CN111585630B

CN111585630B - Method for indicating and determining precoding vector and communication device

Info

Publication number: CN111585630B
Application number: CN201910182198.2A
Authority: CN
Inventors: 高翔; 刘鹍鹏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-02-15
Filing date: 2019-03-11
Publication date: 2021-09-21
Anticipated expiration: 2039-03-11
Also published as: CN111585630A

Abstract

The application provides a method for indicating a precoding vector, which comprises the following steps: generating first indication information, wherein the first indication information is used for indicating P frequency domain vectors and K space-frequency merging coefficients, the P frequency domain vectors belong to N frequency domain vector sets, the K space-frequency merging coefficients belong to N space-frequency merging coefficient sets, the N frequency domain vector sets correspond to the N space vector sets one by one, the N space-frequency merging coefficient sets correspond to the N space vector sets one by one, the N space vector sets at least comprise a first space vector set and a second space vector set, at least one space vector set in the N space vector sets corresponds to at least two transmission layers, N, P, K is greater than or equal to 2, and the number of bits of information corresponding to the first space vector set in the first indication information is greater than the number of bits of information corresponding to the second space vector set; and sending the first indication information. The method can reduce the reporting overhead to the maximum extent on the premise of ensuring the minimum system performance loss.

Description

Method for indicating and determining precoding vector and communication device

Technical Field

The present application relates to the field of communications, and more particularly, to indicating and determining a precoding vector and a communication apparatus.

Background

At present, a non-uniform quantization method for a space-frequency compression codebook is known, in which different numbers of space-domain vectors and different numbers of frequency-domain vectors are used for different transmission layers, and/or different numbers of combining coefficients are used for different transmission layers for reporting.

However, this scheme configures a smaller number of spatial and/or frequency domain vectors for weaker transmission layers (the larger the transmission layer index is, the smaller the corresponding channel characteristic value is), which may result in poor PMI accuracy for the weaker transmission layers (e.g., transmission layer #3, transmission layer #4), resulting in poor performance for transmission layer #3, transmission layer # 4.

In order to improve the performance of the transmission layer #3 and the transmission layer #4 under the condition of keeping the reporting overhead unchanged, one implementation is to reduce the overhead of the transmission layer #1 and the transmission layer #2, and one implementation way of reducing the overhead of the transmission layer #1 and the transmission layer #2 is to adjust the number of space-domain vectors and/or frequency-domain vectors, which may cause the performance loss of the transmission layer #1 and the transmission layer #2 to be large, and finally affect the overall performance.

Disclosure of Invention

The application provides a method for indicating and determining a precoding vector and a communication device, which aim to reduce the reporting overhead to the maximum extent on the premise of ensuring the minimum system performance loss.

In a first aspect, a method of indicating a precoding vector is provided. The method may be performed by the terminal device, or may be performed by a chip configured in the terminal device.

Specifically, the method comprises the following steps: generating first indication information indicating the P frequency domain vectors and the K space-frequency combining coefficients, the P frequency domain vectors belong to N sets of frequency domain vectors, the K space-frequency combining coefficients belong to N sets of space-frequency combining coefficients, the N frequency domain vector sets correspond to the N space domain vector sets one by one, the N space-frequency combining coefficient sets correspond to the N space domain vector sets one by one, the N sets of spatial vectors include at least a first set of spatial vectors and a second set of spatial vectors, and at least one set of spatial vectors of the N sets of spatial vectors corresponds to at least two transmission layers, N, P, K is greater than or equal to 2, the first indication information comprises information corresponding to the first space vector set and information corresponding to the second space vector set, the bit number of the first indication information carrying the information corresponding to the first space domain vector set is larger than the bit number of the information carrying the second space domain vector set; and sending the first indication information.

It should be noted that the information corresponding to each space vector set may include an index number of a frequency domain vector corresponding to the space vector set, and the number and position of the space-frequency combining coefficients with nonzero/zero amplitude corresponding to the space vector set indicate quantization information of the space-frequency vector coefficients corresponding to the space vector set. The quantization information of the space-frequency combining coefficient may include an amplitude quantization value and a phase quantization value of the space-frequency combining coefficient, and may also include a wideband amplitude quantization value corresponding to each space-frequency vector, a differential amplitude quantization value corresponding to each space-frequency combining coefficient, and a phase quantization value of each space-frequency combining coefficient.

In the present application, the larger the transmission layer index is, the smaller the channel matrix eigenvalue or signal to interference plus noise ratio (SINR) corresponding to the transmission layer is, for example, the channel matrix eigenvalue or SINR corresponding to transmission layer #2 is smaller than the channel matrix eigenvalue or SINR corresponding to transmission layer # 1.

Based on the technical scheme, the space vector corresponding to different transmission layers is grouped according to the influence degree of the strength of the space vector on the system performance aiming at the frequency domain compression codebook, more bits are distributed to the space vector with larger influence on the system performance (for example, a first space vector set) for reporting, and less quantization bits are distributed to the space vector with smaller influence on the system performance (a second space vector set) for reporting, so that the reporting overhead is reduced to the maximum extent on the premise of ensuring the minimum system performance loss.

It should be noted that the space vector having a large influence on the system performance may be a relatively strong space vector, and the space vector having a small influence on the system performance may be a relatively weak space vector, where a sum of squared magnitudes of space-frequency combining coefficients corresponding to the relatively strong space vector and the relatively weak space vector corresponding to the same transmission layer is greater than or equal to a sum of squared magnitudes of space-frequency combining coefficients corresponding to the relatively weak space vector and the transmission layer, or a minimum value of the space-frequency combining coefficients corresponding to the relatively strong space vector is greater than or equal to a maximum value of the space-frequency combining coefficients corresponding to the relatively weak space vector.

In one possible implementation manner, the N sets of frequency domain vectors include a first set of frequency domain vectors and a second set of frequency domain vectors, the P frequency domain vectors include P1 frequency domain vectors in the first set of frequency domain vectors and P2 frequency domain vectors in the second set of frequency domain vectors, the first set of frequency domain vectors corresponds to the first set of spatial vectors, the second set of frequency domain vectors corresponds to the second set of spatial vectors, P1 is greater than P2, and P2 is greater than or equal to 1.

Based on the above technical solution, by making the number of frequency domain vectors determined for the first space vector set greater than the number of frequency domain vectors determined for the second space vector set, the number of bits carrying information corresponding to the first space vector set (e.g., the index number of the frequency domain vector corresponding to the first space vector set) in the first indication information is greater than the number of bits carrying information corresponding to the second space vector set (e.g., the index number of the frequency domain vector corresponding to the second space vector set), thereby reducing the reporting overhead to the maximum extent on the premise of ensuring that the system performance loss is minimized.

In a possible implementation manner, the N space-frequency merging coefficient sets include a first space-frequency merging coefficient set and a second space-frequency merging coefficient set, the first space-frequency merging coefficient set corresponds to the first space-domain vector set, the second space-frequency merging coefficient set corresponds to the second space-domain vector set, and a quantization bit number of each space-frequency merging coefficient in the first space-frequency merging coefficient set is greater than a quantization bit number of each space-frequency merging coefficient in the second space-frequency merging coefficient set.

Based on the above technical solution, by making the quantization bit number of each space-frequency combining coefficient in the first space-frequency combining coefficient set larger than the quantization bit number of each space-frequency combining coefficient in the second space-frequency combining coefficient set, the bit number of the first indication information carrying information corresponding to the first space-frequency vector set (for example, the quantization information of the space-frequency combining coefficient corresponding to the first space-frequency vector set) is larger than the bit number of the second indication information carrying information corresponding to the second space-frequency vector set (for example, the quantization information of the space-frequency combining coefficient corresponding to the second space-frequency vector set), so as to reduce the reporting overhead to the maximum extent on the premise of ensuring that the system performance loss is minimized.

In one possible implementation, the quantization bit of each space-frequency combination coefficient in the first set of space-frequency combination coefficients includes at least one of an amplitude quantization bit and a phase quantization bit; the quantization bits of each space-frequency combination coefficient in the second set of space-frequency combination coefficients comprise at least one of amplitude quantization bits and phase quantization bits.

It should be noted that the amplitude quantization bits may include a wideband amplitude quantization bit and a differential amplitude quantization bit.

In one possible implementation, the first indication information is further used to indicate Q spatial vectors, Q is greater than or equal to 2, and the Q spatial vectors include Q in the first spatial vector set₁A spatial vector and Q in the second set of spatial vectors₂A plurality of spatial vectors, wherein each spatial vector in the first set of spatial vectors corresponds to S frequency domain vectors, P₁Equal to S or P₁Is equal to S and Q₁S is greater than or equal to 1, each spatial vector in the second set of spatial vectors corresponds to R frequency domain vectors, P₂Equal to R or P₂Is equal to R and Q₂R is greater than or equal to 1.

In one possible implementation, the method further includes: receiving second indication information indicating at least one of: the number Q of space vectors in the first set of space vectors ₁The number Q of the space vectors in the second space vector set₂The number P of the frequency domain vectors in the first frequency domain vector set₁The number P of the frequency domain vectors in the second frequency domain vector set₂The number of space-frequency combining coefficients in the first space-frequency combining coefficient set and the number of space-frequency combining coefficients in the second space-frequency combining coefficient set.

It is noted that the number of frequency-domain combining coefficients included in each set of spatial vectors may be p times the number of frequency-domain units, p <1 and p may be 3/4, 1/2, 1/4 or 1/8. Furthermore, the number of space-frequency combining coefficients may be β times the number of space-frequency vector pairs, β <1 and may take on values of 3/4, 1/2, 1/4 or 1/8. Therefore, the second indication information may also indicate the above-described scale factors p and β.

In a possible implementation manner, the number of space-frequency combining coefficients in the first space-frequency combining coefficient set is greater than the number of space-frequency combining coefficients in the second space-frequency combining coefficient set.

Based on the above technical solution, by making the number of the space-frequency combining coefficients determined for the first space-frequency combining coefficient set greater than the number of the space-frequency combining coefficients determined for the second space-frequency combining coefficient set, the number of bits carrying information corresponding to the first space-domain vector set (for example, quantization information of the space-frequency combining coefficients corresponding to the first space-domain vector set) in the first indication information is greater than the number of bits carrying information corresponding to the second space-domain vector set (for example, quantization information of the space-frequency combining coefficients corresponding to the second space-domain vector set), so as to reduce the reporting overhead to the maximum extent on the premise of ensuring that the system performance loss is minimized.

In one possible implementation, Q in the first set of spatial vectors₁The spatial vectors include a portion of the vector corresponding to the first transmission layer and a portion of the vector corresponding to the second transmission layer, Q in the second set of spatial vectors₂The spatial vectors include a partial vector corresponding to the first transmission layer and a partial vector corresponding to the second transmission layer.

Based on the above technical solution, when the number of the transmission layers is 2, by dividing the space domain vector corresponding to the transmission layer #1 (e.g., the first transmission layer) into two parts of strong and weak, and dividing the space domain vector corresponding to the transmission layer #2 (e.g., the second transmission layer) into two parts of strong and weak, and combining a stronger set of spatial vectors corresponding to the transmission layer #1 and a stronger set of spatial vectors corresponding to the transmission layer #2 into a first set of spatial vectors, combining a weaker set of spatial vectors corresponding to the transmission layer #1 and a weaker set of spatial vectors corresponding to the transmission layer #2 into a second set of spatial vectors, and the bit number of the first indication information carrying the information corresponding to the first space vector set is larger than the bit number of the information carrying the second space vector set, therefore, on the premise of ensuring the minimum system performance loss, the reporting overhead is reduced to the maximum extent.

In a possible implementation manner, a value of N is 3, the N space vector sets further include a third space vector set, the space vectors in the third space vector set include all vectors corresponding to a third transmission layer, the first indication information further includes information corresponding to the third space vector set, and a number of bits carrying the information corresponding to the third space vector set in the first indication information is smaller than a number of bits carrying the information corresponding to the first space vector set.

Further, the number of bits carrying information corresponding to the third space vector set in the first indication information generated by the terminal device is smaller than the number of bits carrying information corresponding to the first space vector set and is greater than the number of bits carrying information corresponding to the second space vector set.

Based on the above technical solution, when the number of the transmission layers is 3, the spatial vector corresponding to the transmission layer #1 (e.g., the first transmission layer) is divided into two parts, namely a strong part and a weak part, the spatial vector corresponding to the transmission layer #2 (e.g., the second transmission layer) is divided into two parts, a group of stronger spatial vectors corresponding to the transmission layer #1 and a group of stronger spatial vectors corresponding to the transmission layer #2 are merged into a first spatial vector set, a group of weaker spatial vectors corresponding to the transmission layer #1 and a group of weaker spatial vectors corresponding to the transmission layer #2 are merged into a second spatial vector set, all spatial vectors corresponding to the transmission layer #3 are determined as a third spatial vector set, and the number of bits of the spatial vector set corresponding to the third spatial vector set in the first indication information is smaller than the number of bits of the spatial vector set corresponding to the information and larger than the number of the bits of the spatial vector set corresponding to the second spatial vector set, therefore, on the premise of ensuring the minimum system performance loss, the reporting overhead is reduced to the maximum extent.

In a possible implementation manner, a value of N is 3, the N space vector sets further include a third space vector set, the space vectors in the third space vector set include all vectors corresponding to a third transmission layer and all vectors corresponding to a fourth transmission layer, the first indication information further includes information corresponding to the third space vector set, and a bit number of information corresponding to the third space vector set carried in the first indication information is smaller than a bit number of information corresponding to the first space vector set carried in the first indication information.

Based on the above technical solution, when the number of the transmission layers is 4, the spatial vector corresponding to the transmission layer #1 (e.g., the first transmission layer) is divided into two parts, namely a strong part and a weak part, the spatial vector corresponding to the transmission layer #2 (e.g., the second transmission layer) is divided into two parts, a group of stronger spatial vectors corresponding to the transmission layer #1 and a group of stronger spatial vectors corresponding to the transmission layer #2 are merged into a first spatial vector set, a group of weaker spatial vectors corresponding to the transmission layer #1 and a group of weaker spatial vectors corresponding to the transmission layer #2 are merged into a second spatial vector set, all spatial vectors corresponding to the transmission layer #3 and all spatial vectors corresponding to the transmission layer #4 are determined as a third spatial vector set, and the number of bits of information carrying the third spatial vector set in the first indication information is smaller than the number of bits of information carrying the first spatial vector set, and the number of bits is larger than the number of bits for carrying the information corresponding to the second space vector set, so that the reporting overhead is reduced to the maximum extent on the premise of ensuring the minimum system performance loss.

In a possible implementation manner, a value of N is 4, the N space vector sets further include a third space vector set and a fourth space vector set, the space vectors in the third space vector set include a partial vector corresponding to a third transmission layer, the space vectors in the fourth space vector set include a partial vector corresponding to the third transmission layer, the first indication information further includes information corresponding to the third space vector set and information corresponding to the fourth space vector set, and a bit number of the first indication information that carries the information corresponding to the third space vector set is greater than a bit number of the first indication information that carries the information corresponding to the fourth space vector set and is less than a bit number of the first indication information that carries the information corresponding to the first space vector set.

In a possible implementation manner, a value of N is 4, the N space vector sets further include a third space vector set and a fourth space vector set, the space vectors in the third space vector set include a partial vector corresponding to a third transmission layer and a partial vector corresponding to a fourth transmission layer, the space vectors in the fourth space vector set include a partial vector corresponding to the third transmission layer and a partial vector corresponding to the fourth transmission layer, the first indication information further includes information corresponding to the third space vector set and information corresponding to the fourth space vector set, and a number of bits of information corresponding to the third space vector set in the first indication information is greater than a number of bits of information corresponding to the fourth space vector set and is less than a number of bits of information corresponding to the first space vector set.

Further, the number of bits carrying information corresponding to the second space vector set in the first indication information generated by the terminal device is greater than the number of bits carrying information corresponding to the fourth space vector set and is less than the number of bits carrying information corresponding to the third space vector set.

Based on the above technical solution, when the number of the transmission layers is 4, the space vector corresponding to the transmission layer #1 is divided into two parts according to the strength of the space vector, the space vector corresponding to the transmission layer #2 is divided into two parts according to the strength of the space vector, the space vector corresponding to the transmission layer #3 is divided into two parts according to the strength of the space vector, the space vector corresponding to the transmission layer #4 is divided into two parts according to the strength of the space vector, a group of strong space vectors corresponding to the transmission layer #1 and a group of strong space vectors corresponding to the transmission layer #2 are merged into a first space vector set, a group of weak space vectors corresponding to the transmission layer #1 and a group of weak space vectors corresponding to the transmission layer #2 are merged into a second space vector set, a group of strong space vectors corresponding to the transmission layer #3 and a group of strong space vectors corresponding to the transmission layer #4 are determined as a third space vector set, merging a weaker group of space vectors corresponding to the transmission layer #3 and a weaker group of space vectors corresponding to the transmission layer #4 into a fourth space vector set, wherein the number of bits of information corresponding to the third space vector set carried in the first indication information is larger than the number of bits of information corresponding to the fourth space vector set and smaller than the number of bits of information corresponding to the first space vector set, and the number of bits of information corresponding to the second space vector set carried in the first indication information is larger than the number of bits of information corresponding to the fourth space vector set and smaller than the number of bits of information corresponding to the third space vector set, so that the reporting overhead is reduced to the maximum extent on the premise of ensuring the minimum system performance loss.

In one possible implementation, the sum of the number of spatial vectors in the N sets of spatial vectors is equal to the sum of the number of spatial vectors corresponding to all transmission layers.

In one possible implementation, the value of N is 3, the N sets of spatial vectors further include a third set of spatial vectors, the spatial vectors in the first set of spatial vectors comprise a portion of vectors corresponding to the first transmission layer and a portion of vectors corresponding to the second transmission layer, the spatial vectors in the second set of spatial vectors include a portion vector corresponding to the first transmission layer, a portion vector corresponding to the second transmission layer, a portion vector corresponding to the third transmission layer, and a portion vector corresponding to the fourth transmission layer, the spatial vectors in the third set of spatial vectors comprises a portion of vectors corresponding to the third transmission layer and a portion of vectors corresponding to the fourth transmission layer, the first indication information further includes information corresponding to the third space vector set, and the number of bits carrying the information corresponding to the third space vector set in the first indication information is smaller than the number of bits carrying the information corresponding to the first space vector set.

Based on the above technical solution, when the number of the transmission layers is 4, by dividing the spatial vector corresponding to the transmission layer #1 (e.g., the first transmission layer) into two strong and weak portions, dividing the spatial vector corresponding to the transmission layer #2 (e.g., the second transmission layer) into two strong and weak portions, dividing the spatial vector corresponding to the transmission layer #3 (e.g., the third transmission layer) into two strong and weak portions, dividing the spatial vector corresponding to the transmission layer #4 (e.g., the fourth transmission layer) into two strong and weak portions, merging the strong set of spatial vectors corresponding to the transmission layer #1 and the strong set of spatial vectors corresponding to the transmission layer #2 into a first set of spatial vectors, merging the weak set of spatial vectors corresponding to the transmission layer #1, the weak set of spatial vectors corresponding to the transmission layer #2, the weak set of spatial vectors corresponding to the transmission layer #3 and the weak set of spatial vectors corresponding to the transmission layer #4 into a second set of spatial vectors, and determining a group of stronger space vectors corresponding to the transmission layer #3 and a group of stronger space vectors corresponding to the transmission layer #4 as a third space vector set, and enabling the number of bits of information corresponding to the third space vector set carried in the first indication information to be smaller than the number of bits of information corresponding to the first space vector set and larger than the number of bits of information corresponding to the second space vector set, so that the reporting overhead is reduced to the maximum extent on the premise of ensuring the minimum system performance loss.

In a possible implementation manner, a value of N is 3, the N space vector sets further include a third space vector set, the space vectors in the first space vector set include partial vectors corresponding to the first transmission layer and the second transmission layer, the space vectors in the second space vector set include partial vectors corresponding to the first transmission layer, partial vectors corresponding to the second transmission layer, and partial vectors corresponding to the third transmission layer, the space vectors in the third space vector set include partial vectors corresponding to the third transmission layer, the first indication information further includes information corresponding to the third space vector set, and a number of bits in the first indication information that carries the information corresponding to the third space vector set is smaller than a number of bits that carries the information corresponding to the first space vector set.

Based on the above technical solution, when the number of the transmission layers is 3, the spatial vector corresponding to the transmission layer #1 (e.g., the first transmission layer) is divided into two strong and weak portions, the spatial vector corresponding to the transmission layer #2 (e.g., the second transmission layer) is divided into two strong and weak portions, the spatial vector corresponding to the transmission layer #3 (e.g., the third transmission layer) is divided into two strong and weak portions, the stronger set of spatial vectors corresponding to the transmission layer #1 and the stronger set of spatial vectors corresponding to the transmission layer #2 are merged into a first set of spatial vectors, the weaker set of spatial vectors corresponding to the transmission layer #1, the weaker set of spatial vectors corresponding to the transmission layer #2 and the weaker set of spatial vectors corresponding to the transmission layer #3 are merged into a second set of spatial vectors, the stronger set of spatial vectors corresponding to the transmission layer #3 is determined as a third set of spatial vectors, and the bit number of the information corresponding to the third space vector set carried in the first indication information is smaller than the bit number of the information corresponding to the first space vector set and larger than the bit number of the information corresponding to the second space vector set, so that the reporting overhead is reduced to the maximum extent on the premise of ensuring the minimum system performance loss.

In a possible implementation manner, the sum of squared amplitudes of the space-frequency combining coefficients corresponding to each transmission layer in the first set of space-frequency combining coefficients is greater than or equal to the sum of squared amplitudes of the space-frequency combining coefficients corresponding to the transmission layers in the second set of space-frequency combining coefficients, or the minimum value of the amplitude values corresponding to the space-frequency combining coefficients corresponding to each transmission layer in the first set of space-frequency combining coefficients is greater than or equal to the maximum value of the amplitude values of the space-frequency combining coefficients corresponding to the transmission layers in the second set of space-frequency combining coefficients, or the minimum value of the broadband amplitude values corresponding to the space-frequency combining coefficients corresponding to each transmission layer in the first set of space-frequency combining coefficients is greater than or equal to the maximum value of the broadband amplitude values of the space-frequency combining coefficients corresponding to the transmission layers in the second set of space-frequency combining coefficients.

In a possible implementation manner, the N sets of space-frequency merging coefficients further include a third set of space-frequency merging coefficients and a fourth set of space-frequency merging coefficients, the third set of space-frequency merging coefficients corresponds to the third set of space-frequency vectors, the fourth set of space-frequency merging coefficients corresponds to the fourth set of space-frequency vectors, a sum of squared amplitudes of space-frequency merging coefficients corresponding to each transmission layer in the third set of space-frequency merging coefficients is greater than or equal to a sum of squared amplitudes of space-frequency merging coefficients of the transmission layers in the fourth set of space-frequency merging coefficients, or a minimum value of amplitude values corresponding to space-frequency merging coefficients corresponding to each transmission layer in the third set of space-frequency merging coefficients is greater than or equal to a maximum value of amplitude values of space-frequency merging coefficients of the transmission layers in the fourth set of space-frequency merging coefficients, or a minimum value of wide-band amplitude values corresponding to space-frequency merging coefficients corresponding to each transmission layer in the third set of space-frequency merging coefficients is greater than or equal to the fourth set of space-frequency merging coefficients The maximum value of the wideband amplitude value of the space-frequency combination coefficient of the transmission layer.

In one possible implementation, the space vector in the first space vector set includes a space vector corresponding to a first polarization direction of a first transmission layer and a space vector corresponding to a first polarization direction of a second transmission layer, and the space vector in the second space vector set includes a space vector corresponding to a second polarization direction of the first transmission layer and a space vector corresponding to a second polarization direction of the second transmission layer.

In a possible implementation manner, a value of N is 3, the N space vector sets further include a third space vector set, the space vectors in the third space vector set include a space vector corresponding to a first polarization direction of a third transmission layer and a space vector corresponding to a second polarization direction of the third transmission layer, the first indication information further includes information corresponding to the third space vector set, and a bit number of information corresponding to the third space vector set carried in the first indication information is smaller than a bit number of information corresponding to the first space vector set carried in the first indication information.

In a possible implementation manner, a value of N is 3, the N space vector sets further include a third space vector set, a space vector in the third space vector set includes a space vector corresponding to a first polarization direction of a third transmission layer, a space vector corresponding to a second polarization direction of the third transmission layer, a space vector corresponding to a first polarization direction of a fourth transmission layer, and a space vector corresponding to a second polarization direction of the fourth transmission layer, the first indication information further includes information corresponding to the third space vector set, and a number of bits carrying information corresponding to the third space vector set in the first indication information is smaller than a number of bits carrying information corresponding to the first space vector set.

In a possible implementation manner, the value of N is 4, the N spatial vector sets further include a third spatial vector set and a fourth spatial vector set, the spatial vectors in the third set of spatial vectors include a spatial vector corresponding to the first polarization direction of the third transmission layer and a spatial vector corresponding to the first polarization direction of the fourth transmission layer, the spatial vectors in the fourth set of spatial vectors include a spatial vector corresponding to the second polarization direction of the third transmission layer and a spatial vector corresponding to the second polarization direction of the fourth transmission layer, the first indication information further includes information corresponding to the third set of spatial vectors and information corresponding to the fourth set of spatial vectors, the bit number of the first indication information carrying the information corresponding to the third space vector set is larger than the bit number of the first indication information carrying the information corresponding to the fourth space vector set and smaller than the bit number of the first indication information carrying the information corresponding to the first space vector set.

In a possible implementation manner, a value of N is 3, the N space vector sets further include a third space vector set, the space vectors in the first space vector set include a space vector corresponding to a first polarization direction of the first transmission layer and a space vector corresponding to a first polarization direction of the second transmission layer, the space vectors in the second space vector set include a space vector corresponding to a second polarization direction of the first transmission layer, a space vector corresponding to a second polarization direction of the second transmission layer and a space vector corresponding to a second polarization direction of the third transmission layer, the space vectors in the third space vector set include a space vector corresponding to a first polarization direction of the third transmission layer, the first indication information further includes information corresponding to the third space vector set, and a number of bits of the space vectors in the first indication information carrying the space information corresponding to the third space vector set is smaller than a ratio of the information corresponding to the first space vector set The number of the bits.

In a possible implementation manner, a value of N is 3, the N space vector sets further include a third space vector set, the space vectors in the first space vector set include space vectors corresponding to a first polarization direction of a first transmission layer, the space vectors in the second space vector set include space vectors corresponding to a second polarization direction of the first transmission layer, the space vectors in the third space vector set include space vectors corresponding to the first polarization direction of a second transmission layer, space vectors corresponding to the first polarization direction of a third transmission layer, space vectors corresponding to the second polarization direction of the second transmission layer and space vectors corresponding to the second polarization direction of the third transmission layer, the first indication information further includes information corresponding to the third space vector set, and a number of space vectors in the first indication information that carry information corresponding to the third space vector set is smaller than a number of space vectors that carry information corresponding to the first vector set The number of bits of (c).

In a possible implementation manner, the value of N is 4, the N spatial vector sets further include a third spatial vector set and a fourth spatial vector set, the spatial vectors in the first spatial vector set include spatial vectors corresponding to the first polarization direction of the first transmission layer, the spatial vectors in the second spatial vector set include spatial vectors corresponding to the second polarization direction of the first transmission layer, the spatial vectors in the third spatial vector set include spatial vectors corresponding to the first polarization direction of the second transmission layer and spatial vectors corresponding to the first polarization direction of the third transmission layer, the spatial vectors in the fourth spatial vector set include spatial vectors corresponding to the second polarization direction of the second transmission layer and spatial vectors corresponding to the second polarization direction of the third transmission layer, the first indication information further includes information corresponding to the third spatial vector set and information corresponding to the fourth spatial vector set, the bit number of the first indication information carrying the information corresponding to the third space vector set is larger than the bit number of the first indication information carrying the information corresponding to the fourth space vector set and smaller than the bit number of the first indication information carrying the information corresponding to the first space vector set.

In a possible implementation manner, the reference amplitude value corresponding to the first polarization direction of the first transmission layer is greater than the reference amplitude value corresponding to the second polarization direction of the first transmission layer, and the reference amplitude value corresponding to the first polarization direction of the second transmission layer is greater than the reference amplitude value corresponding to the second polarization direction of the second transmission layer.

In a possible implementation manner, the reference amplitude value corresponding to the first polarization direction of the third transmission layer is larger than the reference amplitude value corresponding to the second polarization direction of the third transmission layer.

In a possible implementation manner, the reference amplitude value corresponding to the first polarization direction of the fourth transmission layer is larger than the reference amplitude value corresponding to the second polarization direction of the fourth transmission layer.

In one possible implementation, the frequency domain vectors in the second set of frequency domain vectors corresponding to the first transmission layer are determined from the frequency domain vectors in the first set of frequency domain vectors corresponding to the first transmission layer, and the frequency domain vectors in the second set of frequency domain vectors corresponding to the second transmission layer are determined from the frequency domain vectors in the first set of frequency domain vectors corresponding to the second transmission layer.

In a possible implementation manner, the N spatial vector sets further include a third frequency domain vector set and a fourth frequency domain vector set, the third frequency domain vector set corresponds to the third spatial vector set, the fourth frequency domain vector set corresponds to the fourth spatial vector set, frequency domain vectors in the fourth frequency domain vector set corresponding to the third transmission layer are determined from the frequency domain vectors in the third frequency domain vector set corresponding to the third transmission layer, and frequency domain vectors in the fourth frequency domain vector set corresponding to the fourth transmission layer are determined from the frequency domain vectors in the third frequency domain vector set corresponding to the fourth transmission layer.

In a second aspect, a method of determining a precoding vector is provided. The method may be performed by a network device, or may be performed by a chip configured in the network device.

Specifically, the method comprises the following steps: receiving first indication information indicating P frequency domain vectors and K space-frequency combining coefficients, the P frequency domain vectors belong to N sets of frequency domain vectors, the K space-frequency combining coefficients belong to N sets of space-frequency combining coefficients, the N frequency domain vector sets correspond to the N space domain vector sets one by one, the N space-frequency combining coefficient sets correspond to the N space domain vector sets one by one, the N sets of spatial vectors include at least a first set of spatial vectors and a second set of spatial vectors, and at least one set of spatial vectors of the N sets of spatial vectors corresponds to at least two transmission layers, N, P, K is greater than or equal to 2, the first indication information comprises information corresponding to the first space vector set and information corresponding to the second space vector set, the bit number of the first indication information carrying the information corresponding to the first space domain vector set is larger than the bit number of the information carrying the second space domain vector set; and determining a precoding vector according to the first indication information.

It should be noted that the space vector having a large influence on the system performance may be a stronger space vector, and the space vector having a smaller influence on the system performance may be a weaker space vector, where a sum of squared amplitudes of the space-frequency combining coefficients corresponding to the stronger space vector is greater than or equal to a sum of squared amplitudes of the space-frequency combining coefficients corresponding to the weaker space vector, or a minimum value of the amplitude values of the space-frequency combining coefficients corresponding to the stronger space vector is greater than or equal to a maximum value of the amplitude values of the space-frequency combining coefficients corresponding to the weaker space vector.

In one possible implementation, the N sets of frequency domain vectors include a first set of frequency domain vectors and a second set of frequency domain vectors, and the P sets of frequency domain vectors include P in the first set of frequency domain vectors₁A frequency domain vector and P in the second set of frequency domain vectors₂A plurality of frequency domain vectors, the first set of frequency domain vectors corresponding to the first set of spatial vectors, the second set of frequency domain vectors corresponding to the second set of spatial vectors, P₁Greater than P₂And P is₂Greater than or equal to 1.

In one possible implementation, the first indication information is further used to indicate Q spatial vectors, Q is greater than or equal to 2, and the Q spatial vectors include Q in the first spatial vector set ₁A spatial vector and Q in the second set of spatial vectors₂A plurality of spatial vectors, wherein each spatial vector in the first set of spatial vectors corresponds to S frequency domain vectors, P₁Equal to S or P₁Is equal to S and Q₁S is greater than or equal to 1, each spatial vector in the second set of spatial vectors corresponds to R frequency domain vectors, P₂Equal to R or P₂Is equal to R and Q₂R is greater than or equal to 1.

In one possible implementation, the method further includes: sending second indication information, wherein the second indication information is used for indicating at least one of the following items: the number Q of space vectors in the first set of space vectors₁The number Q of the space vectors in the second space vector set₂The number P of the frequency domain vectors in the first frequency domain vector set₁The number P of the frequency domain vectors in the second frequency domain vector set₂The number of the space-frequency combining coefficients in the first space-frequency combining coefficient set and the second space-frequency combining coefficient setThe number of space-frequency combining coefficients in the space-frequency combining coefficient set.

In one possible implementation, L in the first set of spatial vectors₁The spatial vectors include a partial vector corresponding to the first transmission layer and a partial vector corresponding to the second transmission layer, L in the second set of spatial vectors₂The spatial vectors include a partial vector corresponding to the first transmission layer and a partial vector corresponding to the second transmission layer.

In a third aspect, a method for determining a target space-frequency matrix is provided, which may be performed by a terminal device or a chip configured in the terminal device.

Specifically, the method comprises the following steps: the terminal equipment determines first information, wherein the first information is used for determining that R transmission layers are in N_fA corresponding target space-frequency matrix V on each frequency domain unit, wherein the target space-frequency matrix V is N_sLine R N_fA matrix of the columns is formed,

wherein

For the R-th transmission layer, the target space-frequency vector corresponding to the b-th frequency domain unit, R is greater than or equal to 1 and less than or equal to R, the above-mentioned amplitude quantization bits may include wideband amplitude quantization bits, b is greater than or equal to 1 and less than or equal to N _fSaid target space-frequency matrix V satisfies

The W is₁Is N composed of alpha L space vectors selected from the space vector set_sA matrix of rows α L and columns, W₃＝[W_f(1),…,W_f(αL)]Wherein W is_f(i) M selected from the set of frequency domain vectors for the ith spatial vector_iM formed by frequency domain vectors_iRow RN_fMatrix of columns, set of frequency domain vectors may be RN_fMultiplying by RN_fThe vector contained by the orthogonal DFT matrix or the oversampled DFT matrix of size, or RN_fMultiplying by RN_fThe conjugate transpose of the orthogonal DFT matrix of size or the conjugate transpose of the oversampled DFT matrix contains vectors,

W₂ ⁽ⁱ⁾is that the corresponding dimension of each space vector is 1M_iThe space-frequency merging coefficient matrix; and the terminal equipment sends the first information to the network equipment.

In a possible implementation manner, the α L space-domain beam basis vectors adopt the same M frequency-domain basis vector, and the target space-frequency matrix

Wherein W₁Is N composed of alpha L space beam base vectors selected from the space beam base vector set_sA matrix of rows α L and columns, W₃M rows RN formed by M frequency domain basis vectors selected from frequency domain basis vector set_fMatrix of columns, W₂Is a space-frequency merging coefficient matrix with dimension alpha L M.

In a possible implementation manner, the first information includes first indication information, second indication information, and third indication information, where the first indication information is used to indicate index numbers of α L space-domain vectors, the second indication information is used to indicate an index number of a frequency-domain vector corresponding to each space-domain vector, and the third indication information is used to indicate amplitude and phase quantization values of space-frequency merging coefficients.

The above method can be regarded as combining the space-frequency vectors of R transmission layers into a higher dimensional space-frequency matrix (N) with larger dimension_sRow RN_fA matrix of columns). And performing two-domain compression on the high-dimensional space-frequency matrix.

In a possible implementation manner, the first information may further include fourth indication information and fifth indication information, where the fourth indication information is used to indicate the number of the non-zero-magnitude combining coefficients, and the fifth indication information is used to indicate indexes of the non-zero-magnitude combining coefficients.

In a fourth aspect, an apparatus for indicating a precoding vector is provided, which includes various modules or units for performing the method in any one of the possible implementations of the first aspect.

In a fifth aspect, a device for indicating a precoding vector is provided, where the device for indicating a precoding vector may be a terminal device in the above method design, or a chip disposed in the terminal device. The apparatus for indicating a precoding vector includes: a processor, coupled to the memory, may be configured to execute the instructions in the memory to implement the method of any one of the possible implementations of the first aspect. Optionally, the apparatus for indicating a precoding vector further comprises a memory. Optionally, the means for indicating a precoding vector further comprises a communication interface, the processor being coupled to the communication interface.

In one implementation, the means for indicating a precoding vector is a terminal device. When the means for indicating a precoding vector is a terminal device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the means for indicating the precoding vector is a chip configured in the terminal device. When the means for indicating a precoding vector is a chip configured in the terminal device, the communication interface may be an input/output interface.

Alternatively, the transceiver may be a transmit-receive circuit. Alternatively, the input/output interface may be an input/output circuit.

In a sixth aspect, an apparatus for determining a precoding vector is provided, which includes various modules or units for performing the method in any one of the possible implementations of the second aspect.

In a seventh aspect, a device for determining a precoding vector is provided, where the device for determining a precoding vector may be a network device designed by the foregoing method, or a chip disposed in the network device. The apparatus for determining a precoding vector includes: a processor, coupled to the memory, may be configured to execute the instructions in the memory to implement the method of any of the possible implementations of the second aspect. Optionally, the apparatus for determining a precoding vector further comprises a memory. Optionally, the apparatus for determining a precoding vector further comprises a communication interface, the processor being coupled to the communication interface.

In one implementation, the means for determining the precoding vector is a network device. When the means for determining the precoding vector is a network device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the means for determining the precoding vector is a chip configured in the network device. When the means for determining the precoding vector is a chip configured in the network device, the communication interface may be an input/output interface.

In an eighth aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions), which when executed, causes a computer to perform the method of any of the possible implementations of the first or second aspect described above.

In a ninth aspect, a computer-readable medium is provided, which stores a computer program (which may also be referred to as code or instructions) that, when executed on a computer, causes the computer to perform the method of any one of the possible implementations of the first or second aspect.

Drawings

Fig. 1 is a schematic diagram of a communication system suitable for indicating and determining a precoding vector according to an embodiment of the present application;

fig. 2 is a schematic flow chart of a method for indicating and determining a precoding vector provided by an embodiment of the present application;

fig. 3 is a schematic block diagram of an apparatus for indicating a precoding vector according to an embodiment of the present application;

fig. 4 is another schematic block diagram of an apparatus for indicating precoding vectors according to an embodiment of the present application;

fig. 5 is a schematic block diagram of an apparatus for determining a precoding vector according to an embodiment of the present application;

fig. 6 is another schematic block diagram of an apparatus for determining a precoding vector according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, a future fifth Generation (5G) System, or a New Radio Network (NR), etc.

For the convenience of understanding the embodiments of the present application, a communication system applicable to the embodiments of the present application will be first described in detail by taking the communication system shown in fig. 1 as an example. Fig. 1 is a schematic diagram of a communication system 100 suitable for use in a method of indicating and determining a precoding vector according to an embodiment of the present application. As shown in fig. 1, the communication system 100 may include at least one network device, such as the network device 110 shown in fig. 1; the communication system 100 may also include at least one terminal device, such as the terminal device 120 shown in fig. 1. Network device 110 and terminal device 120 may communicate via a wireless link. Each communication device, such as network device 110 or terminal device 120, may be configured with multiple antennas. For each communication device in the communication system 100, the configured plurality of antennas may include at least one transmit antenna for transmitting signals and at least one receive antenna for receiving signals. Accordingly, communication between communication devices in the communication system 100, such as between the network device 110 and the terminal device 120, may be via multiple antenna techniques.

It should be understood that the network device in the communication system may be any device having a wireless transceiving function. The network devices include, but are not limited to: evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), home base station (e.g., home evolved Node B or home Node B, HNB), baseband unit (BBU), Access Point (AP) in wireless fidelity (WiFi) system, wireless relay Node, wireless backhaul Node, Transmission Point (TP) or Transmission and Reception Point (TRP), etc., and may also be 5G, such as NR, gbb in the system, or transmission point (TRP or TP), one or a group of base stations in the 5G system may also include multiple antennas, or panels, and may also be configured as network panels or NB, such as a baseband unit (BBU), or a Distributed Unit (DU), etc.

In some deployments, the gNB may include a Centralized Unit (CU) and a DU. The gNB may also include a Radio Unit (RU). The CU implements part of the function of the gNB and the DU implements part of the function of the gNB. For example, a CU implements Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP) functions, and a DU implements Radio Link Control (RLC), Medium Access Control (MAC) and Physical (PHY) functions. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as the RRC layer signaling, may also be considered to be transmitted by the DU or the DU + CU under this architecture. It is to be understood that the network device may be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU may be divided into network devices in a Radio Access Network (RAN), or may be divided into network devices in a Core Network (CN), which is not limited in this application.

It should also be understood that terminal equipment in the wireless communication system may also be referred to as User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The embodiments of the present application do not limit the application scenarios.

It should also be understood that fig. 1 is a simplified schematic diagram that is merely illustrated for ease of understanding, and that other network devices or other terminal devices, which are not shown in fig. 1, may also be included in the communication system 100.

In order to facilitate understanding of the embodiments of the present application, the following description is briefly made of terms related to the embodiments of the present application.

1. The precoding technology comprises the following steps: under the condition of known channel state, a transmitting device (such as a network device) can process a signal to be transmitted by means of a precoding matrix matched with channel resources, so that the signal to be transmitted after precoding is adaptive to a channel, and the complexity of eliminating the influence between channels by a receiving device (such as a terminal device) is reduced. Therefore, by precoding the signal to be transmitted, the received signal quality (e.g., signal to interference plus noise ratio (SINR)) is improved. Therefore, the precoding technique can help to improve the performance of transmission between the sending device and multiple receiving devices on the same time-frequency resource, that is, the performance of a multi-user multiple input multiple output (MU-MIMO) system.

It should be understood that the related description regarding the precoding technique is merely exemplary for ease of understanding and is not intended to limit the scope of the embodiments of the present application. In a specific implementation process, the sending device may also perform precoding in other manners. For example, when the channel information (for example, but not limited to, the channel matrix) cannot be obtained, precoding is performed using a preset precoding matrix or a weighting processing method. For brevity, the detailed contents thereof are not described herein again.

2. Precoding matrix and Precoding Matrix Indication (PMI): the PMI may be used to indicate a precoding matrix. The precoding matrix may be, for example, a precoding matrix corresponding to each frequency domain unit determined by the terminal device based on a channel matrix of each frequency domain unit (e.g., a frequency domain subband, or R times of the frequency domain subband, R1 or 1/2, or RB).

The channel matrix may be determined by the terminal device through channel estimation or the like or based on channel reciprocity. However, it should be understood that the specific method for determining the channel matrix by the terminal device is not limited to the foregoing, and the specific implementation manner may refer to the prior art, which is not listed here for brevity.

The precoding matrix may be obtained by performing Singular Value Decomposition (SVD) on the channel matrix or a covariance matrix of the channel matrix, or may be obtained by performing eigenvalue decomposition (EVD) on the covariance matrix of the channel matrix.

It should be understood that the determination manner of the precoding matrix listed above is only an example, and should not constitute any limitation to the present application. The determination of the precoding matrix can be made by referring to the prior art, and for the sake of brevity, it is not listed here.

In this embodiment, the precoding matrix corresponding to the frequency domain unit may refer to a precoding matrix fed back by the frequency domain unit, and may be, for example, a precoding matrix that performs channel measurement and feedback based on a reference signal on the frequency domain unit. The precoding matrix corresponding to the frequency domain unit may be a precoding matrix for precoding data to be subsequently transmitted through the frequency domain unit. Hereinafter, the precoding matrix corresponding to a frequency domain element may also be simply referred to as the precoding matrix of the frequency domain element, and the precoding vector corresponding to a frequency domain element may also be referred to as the precoding vector of the frequency domain element.

It should be further noted that, in the embodiment of the present application, a precoding matrix determined by a network device based on feedback of a terminal device may be directly used for downlink data transmission; the precoding matrix finally used for downlink data transmission may also be obtained through some beamforming methods, for example, including zero-forcing (ZF), regularized zero-forcing (RZF), minimum mean-squared error (MMSE), signal-to-leakage-and-noise (SLNR), and so on. This is not a limitation of the present application. Unless otherwise specified, the precoding matrix (or vector) referred to in the following may refer to a precoding matrix (or vector) determined by the network device based on the terminal device feedback.

3. Precoding vector: a precoding matrix may comprise one or more vectors, such as column vectors. One precoding matrix may be used to determine one or more precoding vectors.

When the number of transmission layers is 1 and the number of polarization directions of the transmit antennas is also 1, the precoding vector may be a precoding matrix. When the number of transmission layers is multiple and the number of polarization directions of the transmit antennas is 1, the precoding vector may refer to a component of the precoding matrix on one transmission layer. When the number of transmission layers is 1 and the number of polarization directions of the transmit antennas is multiple, the precoding vector may refer to a component of the precoding matrix in one polarization direction. When the number of transmission layers is multiple and the number of polarization directions of the transmit antennas is also multiple, the precoding vector may refer to a component of the precoding matrix in one transmission layer and one polarization direction.

It should be understood that the precoding vector may also be determined from the vector in the precoding matrix, e.g., by mathematically transforming the vector in the precoding matrix. The mathematical transformation relation between the precoding matrix and the precoding vector is not limited in the present application.

4. Antenna port (antenna port): referred to as a port for short. Which may be understood as a virtual antenna identified by the receiving device. Or spatially distinguishable transmit antennas. One antenna port may be configured for each virtual antenna, each virtual antenna may be a weighted combination of multiple physical antennas, each antenna port may correspond to one reference signal, and thus, each antenna port may be referred to as a port of one reference signal. In the embodiment of the present application, an antenna port may refer to an actual independent transmit unit (TxRU).

5. Spatial domain vector (spatial domain vector): or spatial basis vectors or spatial beam vectors. Each element in the spatial vector may represent a weight of each antenna port. Based on the weight of each antenna port represented by each element in the space-domain vector, signals of each antenna port are linearly superposed, and a region with stronger signals can be formed in a certain direction of space.

For convenience of explanation, the spatial vector is assumed to be denoted as u. The length of the space-domain vector u may be the number of transmit antenna ports N in one polarization direction_s，N_sIs more than or equal to 1 and is an integer. The space vector may be, for example, of length N_sA column vector or a row vector. This is not a limitation of the present application.

The definition of the spatial vector can be referred to two-dimensional (2dimensions, 2D) -discrete Fourier transform (D) defined in the type II codebook in NR protocol TS 38.214 version 15(release 15, R15)iscrete Fourier Transform, DFT) vector or oversampled 2D-DFT vector v_l,m. For brevity, further description is omitted here.

6. Spatial vector set: the set of candidate spatial vectors may include a plurality of spatial vectors of different lengths to correspond to different numbers of transmit antenna ports. In the embodiment of the present application, the length of the space-domain vector is N _sTherefore, the length of each space domain vector in the space domain vector set to which the space domain vector belongs reported by the terminal device is N_s。

In one possible design, the set of spatial vectors may include N_sA space vector of N_sThe space-domain vectors can be orthogonal to each other two by two. Each spatial vector in the set of spatial vectors may be taken from a 2D-DFT matrix. Wherein 2D may represent two different directions, e.g., a horizontal direction and a vertical direction. If the number of antenna ports in the horizontal direction and the vertical direction is N respectively₁And N₂Then N_s＝N₁N₂。

The N is_sA spatial vector can be written, for example

The N is_sThe space vector can construct a matrix

If each space vector in the set of space vectors is taken from a 2D-DFT matrix, then

Wherein D_NIs an NxN orthogonal DFT matrix, the element of the m-th row and the N-th column is

In another possible design, the set of spatial vectors may be passed through an oversampling factorO_sExpansion to O_s×N_sA spatial vector. In this case, the set of spatial vectors may include O_sA plurality of subsets, each subset may include N_sA spatial vector. N in each subset_sThe space-domain vectors can be orthogonal to each other two by two. Each spatial vector in the set of spatial vectors may be taken from an oversampled 2D-DFT matrix. Wherein the oversampling factor O _sIs a positive integer. Specifically, O_s＝O₁×O₂，O₁May be an oversampling factor in the horizontal direction, O₂May be an oversampling factor in the vertical direction. O is₁≥1，O₂≥1，O₁、O₂Are not 1 at the same time and are integers.

O < th > in the set of spatial vectors_s(1≤o_s≤O_sAnd o is_sIs an integer) of subsets_sThe spatial vectors can be respectively written as

Based on the o_sN of the subset_sThe space vector can construct a matrix

Thus, each spatial vector in the set of spatial vectors may be taken from a 2D-DFT matrix or an oversampled 2D-DFT matrix. Each column vector in the set of spatial vectors may be referred to as a 2D-DFT vector or an oversampled 2D-DFT vector. In other words, the spatial vector may be a 2D-DFT vector or an oversampled 2D-DFT vector.

7. Frequency domain vector (frequency domain vector): the vector for representing the change rule of the channel in the frequency domain is provided in the embodiment of the application. Each frequency domain vector may represent a law of variation. Since the signal may travel multiple paths from the transmit antenna to the receive antenna as it travels through the wireless channel. Multipath delay causes frequency selective fading, which is a change in the frequency domain channel. Therefore, the variation law of the channel in the frequency domain caused by the time delay on different transmission paths can be represented by different frequency domain vectors.

For convenience of explanation hereinafter, the frequency domain vector is assumed to be denoted as v. The length of the frequency domain vector may be the number of frequency domain units, or the number of frequency domain units (e.g., reporting band) that need to report CSI. In addition, the length of the frequency domain vector may also be a preset value, such as an integer that is a multiple of 2, 3, or 5. The length of the frequency domain vector is denoted N_f，N_fIs more than or equal to 1 and is an integer.

8. Frequency domain vector set: the set of vectors formed by the candidate frequency domain vectors may comprise a plurality of frequency domain vectors of different lengths. One or more frequency domain vectors of the set of frequency domain vectors are selected for constructing a precoding vector.

In one possible design, the set of frequency domain vectors may include a plurality of frequency domain vectors. The plurality of frequency domain vectors may be orthogonal to each other two by two. Each frequency domain vector in the set of frequency domain vectors may be taken from a DFT matrix or an IDFT matrix (i.e., the conjugate transpose of the DFT matrix).

For example, the N_fA frequency domain vector can be written, for example

The N is_fThe frequency domain vectors can construct a matrix B_f，

In another possible design, the set of frequency domain vectors may be passed through an oversampling factor O_fExpansion to O_f×N_fA frequency domain vector. In this case, the set of frequency domain vectors may include O _fA plurality of subsets, each subset may include N_fA frequency domain vector. N in each subset_fThe frequency domain vectors can be orthogonal to each other two by two. Each subset may be referred to as an orthogonal set. Each frequency domain vector in the set of frequency domain vectors may be taken from an oversampled DFT matrix or a conjugate transpose of an oversampled DFT matrixAnd (4) matrix. Wherein the oversampling factor O_fIs a positive integer.

E.g., the o-th in the set of frequency domain vectors_f(1≤o_f≤O_fAnd o is_fIs an integer) of subsets_fThe frequency domain vectors can be respectively recorded as

Based on the o_fN of the subset_fThe frequency domain vectors can construct a matrix

Thus, each frequency domain vector in the set of frequency domain vectors may be taken from a DFT matrix or an oversampled DFT matrix, or from a conjugate transpose of a DFT matrix or a conjugate transpose of an oversampled DFT matrix. Each column vector in the set of frequency domain vectors may be referred to as a DFT vector or an oversampled DFT vector. In other words, the frequency domain vector may be a DFT vector or an oversampled DFT vector.

9. Space-frequency component matrix: a space-frequency component matrix may be determined from a space-frequency vector and a frequency-domain vector. A matrix of space-frequency components may be determined, for example, by a conjugate transpose of a space-domain vector and a frequency-domain vector, e.g., uxv ^HDimension may be N_s×N_f。

It should be appreciated that the space-frequency component matrix may be a representation of the space-frequency fundamental unit defined by a space-frequency vector and a frequency-domain vector. The space-frequency basic unit may also be represented, for example, as a space-frequency component vector, which may be determined, for example, by the Kronecker product of a space-domain vector and a frequency-domain vector; the space-frequency basic unit can also be represented as a space-frequency vector pair, for example. The present application is not limited to the specific representation of the space-frequency basic unit. Based on the same concept, those skilled in the art should be able to determine various possible forms from a spatial domain vector and a frequency domain vector within the scope of the present application. In addition, if a different form from the above list is defined for the spatial vector or the frequency domain vector, the operation relationship between the spatial component matrix and the spatial vector or the frequency domain vector may be different. The application does not limit the operation relation between the space-frequency component matrix and the space-domain vector and the frequency-domain vector.

10. Space-frequency matrix: in the embodiment of the present application, the space-frequency matrix may be understood as an intermediate quantity for determining the precoding matrix. For a terminal device, the space-frequency matrix may be determined by a precoding matrix or a channel matrix. For the network device, the space-frequency matrix may be a weighted sum of a plurality of space-frequency component matrices for recovering the downlink channel or the precoding matrix.

As previously mentioned, the space-frequency component matrix may be represented by a dimension N_s×N_fThe space-frequency matrix can also be expressed as a dimension N_s×N_fOf the matrix of (a). The dimension is N_s×N_fThe space-frequency matrix may include N_fEach length is N_sThe column vector of (2). The N is_fThe column vector may be related to N_fEach column vector may be used to determine a precoding vector for the corresponding frequency domain element.

For example, the space-frequency matrix may be denoted as V,

wherein, V₁To

Is and N_fN corresponding to each frequency domain unit_fEach column vector can be N in length for a single polarization direction antenna_s. The N is_fEach column vector corresponds to N_fTarget precoding vectors for individual frequency domain units. I.e. the space-frequency matrix can be regarded as N_fAnd combining the target precoding vectors corresponding to the frequency domain units to form a joint matrix.

It should be understood that the space-frequency matrix is only one expression for determining the intermediate quantity of the precoding matrix, and should not be taken as an admission of the present applicationConstitute any limitation. For example, the column vectors in the space-frequency matrix are sequentially connected from the left to the right, or arranged according to other predefined rules, so that the length N can also be obtained_s×N_fMay be referred to as a space-frequency vector.

It should also be understood that the dimensions of the space-frequency matrix and the space-frequency vector shown above are merely examples and should not be construed as limiting the present application in any way. For example, the space-frequency matrix may have a dimension N _f×N_sThe matrix of (2). Each row vector may correspond to a frequency domain unit for determining a precoding vector of the corresponding frequency domain unit.

In addition, when the transmitting antenna is configured with a plurality of polarization directions, the dimension of the space-frequency matrix can be further expanded. For example, for a dual polarized directional antenna, the dimension of the space-frequency matrix may be 2N_s×N_fOr N_f×2N_sIn which V is₁To

Is and N_fN corresponding to each frequency domain unit_fColumn vectors each having a length of 2N_s. It should be understood that the present application is not limited to the number of polarization directions of the transmit antennas.

11. And (3) double-domain compression: including spatial domain compression and frequency domain compression. Spatial compression may refer to the selection of one or more spatial vectors in a set of spatial vectors as the spatial vectors from which to construct the precoding vectors. Frequency domain compression may refer to selecting one or more frequency domain vectors in a set of frequency domain vectors as the frequency domain vectors from which to construct the precoding vectors. The selected spatial vector is part or all of the spatial vectors in the set of spatial vectors. The selected frequency domain vector is part or all of the set of frequency domain vectors.

The selected one or more spatial vectors may form a spatial beam basis matrix W ₁Wherein W is₁Each corresponding to a selected one of the spatial vectors. The selected one or more frequency domain vectors may form a frequency domain basis matrix W₃Wherein W is₃Each of (1) toOne column vector corresponds to a selected one of the frequency domain vectors. The space-frequency matrix V for a transmission layer may be represented as the result of a linear combination of the selected one or more space-frequency vectors and the selected one or more frequency-domain vectors,

wherein, if dual polarization directions are adopted, L space vectors, W, are selected for each polarization direction of each transmission layer₁Has a dimension of 2N_sX2L. In one possible implementation, the same L space vectors are used for the two polarization directions

At this time, W₁Can be expressed as

Wherein I_S(i) Indicating the index corresponding to the selected spatial vector. In addition, L spatial vectors that are not exactly the same may be used for the two polarization directions.

For example, if each spatial domain vector selects the same M frequency domain vectors, then

Has dimension of M × N_f，W₃Each column vector corresponds to a frequency domain vector, and the frequency domain vector corresponding to each space domain vector is W at the moment₃M frequency domain vectors.

Is a space-frequency merging coefficient matrix with the dimension of 2L multiplied by M. Space-frequency merging coefficient matrix

The ith row in (b) corresponds to the ith space vector in 2L space vectors and a space-frequency merging coefficient matrix

The jth column in (a) corresponds to the jth frequency-domain basis vector in the M frequency-domain basis vectors. The space-frequency merging coefficient corresponding to the ith space-frequency vector is a space-frequency merging coefficient matrix

The ith row vector in (b), the space-frequency merging coefficient corresponding to the ith space-domain vector is a space-frequency merging coefficient matrix

The element contained in the ith row vector of (a).

Each of the L spatial vectors may correspond to a different frequency-domain basis vector. At this time, the process of the present invention,

wherein

M corresponding to the ith space vector_iM formed by frequency domain vectors_iLine N_fA matrix of columns.

Wherein

Is that the dimension corresponding to the ith space vector is 1 × M_iThe space-frequency combination coefficient matrix of (a),

the space-frequency merging coefficient contained in the vector number is the space-frequency merging coefficient corresponding to the ith space vector. At this time, the process of the present invention,

in total comprise

And a merging coefficient. If the number of the frequency domain vectors corresponding to each space domain vector is M, then

The total number of the merging coefficients is 2 LM.

In addition, the space-frequency matrix V can also be expressed as

At this time W₃Each row vector of (a) corresponds to a selected one of the frequency domain vectors.

It should be noted that each polarization direction of the same transmission layer corresponds to L space vectors, and the two polarization directions of the transmission layer correspond to 2L space vectors in total.

In the embodiment of the present application, 2L spatial vectors selected for two polarization directions of one transmission layer are referred to as spatial vectors corresponding to the transmission layer, and assuming that M frequency vectors are selected for each of the 2L spatial vectors, 2L × M frequency vectors corresponding to the 2L spatial vectors are referred to as frequency vectors corresponding to the transmission layer, and 2L × M space-frequency combining coefficients corresponding to the 2L spatial vectors are referred to as space-frequency combining coefficients corresponding to the transmission layer.

It should also be noted that, in one embodiment, only the merge coefficient matrix needs to be reported

A subset of all the merging coefficients contained in (a). The base station indicates the maximum number K0 of the merging coefficients needing to be reported through the indication information, the UE actually reports K1 merging coefficients, and K₁<＝K₀<2 LM. For the unreported combining coefficient, the corresponding space-frequency combining coefficient is considered to be 0.

It should be noted that, for a transport layer, the space-frequency matrix may be determined by two-domain compression according to the above method. For a plurality of transmission layers, each transmission layer can adopt the same two-domain compression method to determine the space-frequency matrix corresponding to each transmission layer. Taking 2 transmission layers as an example, the 2 transmission layers may use the same L space vectors, or may use L space vectors that are not completely the same. The 2 transmission layers may use the same M frequency domain vectors, or each spatial vector of each transmission layer may correspond to a different frequency domain vector.

It should be further noted that the number L of space-domain vectors, the number M of frequency-domain vectors, and the maximum number K of space-frequency merging coefficients to be reported₀May be configured by the network device through higher layer signaling. The network device can directly configure the specific values of the number L of the space-frequency vectors, the number M of the frequency-domain vectors and the maximum number K0 of the space-frequency merging coefficients to be reported through a high-level signaling, and can also configure indexes corresponding to the specific values. Furthermore, the number of frequency domain combining coefficients may be p times the frequency domain unit, p<1 and the value of p can be 3/4, 1/2, 1/4 or 1/8, and the maximum number K0 of space-frequency merging coefficients needing to be reported can be beta times of 2LM, and the beta is<1 and can take on the values 3/4, 1/2, 1/4 or 1/8.

The matrix defined by one spatial vector and one frequency domain vector may be, for example, the above-described spatial-frequency component matrix. The selected one or more spatial vectors and one or more frequency domain vectors may be used to determine one or more matrices of space-frequency components. The weighted sum of the one or more space-frequency component matrices may be used to construct a space-frequency matrix corresponding to one transmission layer. In other words, the space-frequency matrix may be approximated as a weighted sum of the space-frequency component matrices determined by the selected one or more space-frequency vectors and one or more frequency-domain vectors described above. Here, a space-frequency vector and a frequency-domain vector used to construct a space-frequency component matrix may be referred to as a space-frequency vector pair.

Therefore, after the network device obtains the space vector, the frequency domain vector and the space-frequency combination coefficient which can be used for constructing the space-frequency matrix, the precoding vector corresponding to each frequency domain unit can be further determined based on the constructed space-frequency matrix.

For the purpose of facilitating understanding of the embodiments of the present application, the following description will be made before describing the embodiments of the present application.

First, in the embodiments of the present application, "for indicating" may include for direct indicating and for indirect indicating. For example, when a certain indication information is described as the indication information I, the indication information may be included to directly indicate I or indirectly indicate I, and does not necessarily represent that I is carried in the indication information.

If the information indicated by the indication information is referred to as information to be indicated, in a specific implementation process, there are many ways of indicating the information to be indicated, for example, but not limited to, directly indicating the information to be indicated, such as the information to be indicated itself or an index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein an association relationship exists between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other part of the information to be indicated is known or predetermined. For example, the indication of the specific information may be implemented by means of a predetermined arrangement order of the respective information (e.g., protocol specification), thereby reducing the indication overhead to some extent. Meanwhile, the universal parts of all information can be identified and indicated in a unified mode, so that the indicating overhead caused by independently indicating the same information is reduced. For example, it will be understood by those skilled in the art that the precoding matrix is composed of precoding vectors, and that each precoding vector in the precoding matrix may have the same components in terms of composition or other attributes.

The specific indication method may be any of various existing indication methods, such as, but not limited to, the above indication methods, various combinations thereof, and the like. The specific details of various indication modes can refer to the prior art, and are not described in detail herein. As can be seen from the above description, when a plurality of information of the same type are required to be indicated, for example, different information may be indicated differently. In a specific implementation process, a required indication manner may be selected according to a specific need, and the indication manner selected in the embodiment of the present application is not limited, so that the indication manner related to the embodiment of the present application should be understood to cover various methods that enable a party to be indicated to obtain information to be indicated.

In addition, other equivalent forms of the information to be indicated may exist, for example, a row vector may be represented as a column vector, a matrix may be represented by a transposed matrix of the matrix, a matrix may also be represented as a vector or an array, the vector or the array may be formed by connecting each row vector or column vector of the matrix, a kronecker product of two vectors may also be represented as a product of one vector and a transposed vector of another vector, and the like. The technical solutions provided in the embodiments of the present application should be understood to cover various forms. For example, reference to some or all of the features in the embodiments of the present application should be understood to encompass various manifestations of such features.

The information to be indicated may be sent together as a whole, or may be sent separately by dividing into a plurality of pieces of sub information, and the sending periods and/or sending timings of these pieces of sub information may be the same or different. Specific transmission method this application is not limited. The sending period and/or sending timing of the sub information may be predefined, for example, predefined according to a protocol, or may be configured by the transmitting end device by sending configuration information to the receiving end device. The configuration information may include, for example and without limitation, one or a combination of at least two of radio resource control signaling, such as RRC signaling, MAC layer signaling, such as MAC-CE signaling, and physical layer signaling, such as Downlink Control Information (DCI).

Second, in the embodiments shown below, the first, second, third, fourth and various numerical numbers are merely for convenience of description and are not intended to limit the scope of the embodiments of the present application. For example, different fields, different indication information, etc. are distinguished.

Third, "predefined" may be implemented by saving a corresponding code, table, or other means that can be used to indicate related information in advance in a device (for example, including a terminal device and a network device), and the present application is not limited to a specific implementation manner thereof. Wherein "saving" may refer to saving in one or more memories. The one or more memories may be separate devices or may be integrated in the encoder or decoder, the processor, or the communication device. The one or more memories may also be provided as a portion of a stand-alone device, a portion of which is integrated into a decoder, a processor, or a communication device. The type of memory may be any form of storage medium and is not intended to be limiting of the present application.

Fourth, the "protocol" referred to in the embodiments of the present application may refer to a standard protocol in the communication field, and may include, for example, an LTE protocol, an NR protocol, and a related protocol applied in a future communication system, which is not limited in the present application.

Fifth, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, and c, may represent: a, or, b, or, c, or, a and b, or, a and c, or, b and c, or, a, b and c. Wherein a, b and c may be single or plural respectively.

The following describes in detail a method for indicating and determining a precoding vector according to an embodiment of the present application with reference to the drawings.

It should be understood that the methods provided by the embodiments of the present application may be applied to systems that communicate via multiple antenna techniques, such as the communication system 100 shown in fig. 1. The communication system may include at least one network device and at least one terminal device. The network device and the terminal device can communicate through a multi-antenna technology.

It should also be understood that the embodiments shown below do not particularly limit the specific structure of the execution subject of the method provided by the embodiments of the present application, as long as the communication can be performed according to the method provided by the embodiments of the present application by running the program recorded with the code of the method provided by the embodiments of the present application, for example, the execution subject of the method provided by the embodiments of the present application may be a terminal device or a network device, or a functional module capable of calling the program and executing the program in the terminal device or the network device.

Hereinafter, the method for indicating and determining a precoding vector provided by the embodiment of the present application is described in detail by taking an interaction between a network device and a terminal device as an example without loss of generality.

Fig. 2 is a schematic flow chart of a method 200 for indicating and determining a precoding vector provided by an embodiment of the present application, shown from the perspective of device interaction. As shown, the method 200 may include steps 210 through 240.

The individual steps in the process are described in detail below.

In step 220, the terminal device generates first indication information indicating the M frequency domain vectors and the K space-frequency combining coefficients.

In this embodiment, the P frequency-domain vectors may belong to N sets of frequency-domain vectors, and the K space-frequency combining coefficients may belong to N sets of space-frequency combining coefficients, N, P, K being greater than or equal to 2. The N frequency domain vector sets correspond to the N space domain vector sets one by one, and the N space-frequency merging coefficient sets correspond to the N space domain vector sets one by one.

By way of example and not limitation, at least one of the N spatial vector sets corresponds to at least two transmission layers, for example, the at least one spatial vector set may include spatial vector #1, spatial vector #2, spatial vector #3, spatial vector #4, spatial vector #5, spatial vector #6, spatial vector #7, and spatial vector #8, where spatial vector #1, spatial vector #2, spatial vector #3, and spatial vector #4 may be spatial vectors corresponding to one transmission layer, and spatial vector #5, spatial vector #6, spatial vector #7, and spatial vector #8 may be spatial vectors corresponding to another transmission layer. As another example, the at least one spatial vector set may include spatial vector #1, spatial vector #2, spatial vector #3, spatial vector #4, spatial vector #5, spatial vector #6, spatial vector #7, and spatial vector #8, where two transmission layers correspond to the same spatial vector, i.e., spatial vectors # 1-8 may be spatial vectors corresponding to one transmission layer and spatial vectors corresponding to another transmission layer. By way of example and not limitation, the N spatial vector sets include at least a first spatial vector set and a second spatial vector set, and the terminal device may indicate, to the network device, information corresponding to the first spatial vector set and information corresponding to the second spatial vector set through the first indication information.

For example, the first indication information may include information corresponding to the first spatial vector set and information corresponding to the second spatial vector set, the information corresponding to the first spatial vector set may be PMI indication information corresponding to the first spatial vector set, and may be used to indicate a frequency domain vector corresponding to the first spatial vector set and a space-frequency merging coefficient corresponding to the first spatial vector set, and similarly, the information corresponding to the second spatial vector set may indicate a frequency domain vector corresponding to the second spatial vector set and a space-frequency merging coefficient corresponding to the second spatial vector set.

For example, the information corresponding to the first spatial vector set may include an index number of a frequency domain vector corresponding to the first spatial vector set, an indication of the number and position of space-frequency combining coefficients with non-zero/zero amplitude corresponding to the first spatial vector set, and quantization information of the space-frequency vector coefficients corresponding to the first spatial vector set, and the information corresponding to the second spatial vector set may include an index number of a frequency domain vector corresponding to the second spatial vector set, an indication of the number and position of space-frequency combining coefficients with non-zero/zero amplitude corresponding to the second spatial vector set, and quantization information of the space-frequency vector coefficients corresponding to the second spatial vector set.

The quantization information of the space-frequency combining coefficient may include an amplitude quantization value and a phase quantization value of the space-frequency combining coefficient, and may also include a wideband amplitude quantization value corresponding to each space-frequency vector, a differential amplitude quantization value corresponding to each space-frequency combining coefficient, and a phase quantization value of each space-frequency combining coefficient. And the differential amplitude quantization value corresponding to each space-frequency merging coefficient is a quantization result of the difference value between the amplitude value of each space-frequency merging coefficient and the broadband amplitude value of the space-frequency vector corresponding to the space-frequency merging coefficient. The amplitude quantization value, the differential amplitude quantization value, the phase quantization value of the space-frequency combining coefficient and the wideband amplitude quantization value corresponding to each space-frequency vector may be selected from a preset candidate quantization value set, and the candidate quantization values included in the preset candidate quantization value set may be pre-stored in a table form, and the quantization information used for indicating the amplitude quantization value, the phase quantization value, the differential amplitude quantization value of the space-frequency combining coefficient and the wideband amplitude quantization value corresponding to each space-frequency vector may be indexes corresponding to the candidate quantization values in the pre-stored table (or the candidate quantization value set). The wideband amplitude value corresponding to the space domain vector may be a maximum value in the amplitude values of the space-frequency combining coefficients corresponding to the space domain vector, may also be an average value of the amplitude values of the space-frequency combining coefficients corresponding to the space domain vector, and may also be a wideband amplitude value defined in the R15Type II codebook, that is, an average value of the amplitudes of the space-frequency vector combining coefficients corresponding to all the frequency domain units.

It should be noted that, when the terminal device indicates the position of the nonzero space-frequency combining coefficient to the network device through the first information, each polarization direction of the transmission layer may be respectively indicated, for example, if the number of space-domain vectors corresponding to each polarization direction of the transmission layer is L, each space-domain vector corresponds to M frequency-domain vectors, and the terminal device may indicate by using a bitmap (bitmap) having a length of 2 lxm; or, when the positions of the nonzero space-frequency combining coefficients corresponding to each polarization direction of the same transmission layer are the same, the terminal device may use the same indication for the two polarization directions of the same transmission layer, for example, the terminal device may use a bitmap with a length of L × M for indication.

In this embodiment, the number of bits of the first indication information carrying information corresponding to the first space vector set is greater than the number of bits of the second space vector set carrying information corresponding to the second space vector set.

In step 230, the terminal device transmits the first indication information. Accordingly, the network equipment receives the first indication information sent by the terminal equipment. In step 240, the network device determines a precoding vector according to the received first indication information.

Further, in this embodiment of the present application, the first indication information may be further used to indicate Q spatial vectors, where Q is greater than or equal to 2, and the Q spatial vectors include Q in the first spatial vector set ₁A spatial vector and Q in the second set of spatial vectors₂A plurality of space-domain vectors, the first set of space-domain vectors corresponding to a first set of frequency-domain vectors of the N sets of frequency-domain vectors, the first set of space-domain vectors corresponding to a first set of spatial-frequency combining coefficients of the N sets of spatial-frequency combining coefficients, the second set of space-domain vectors corresponding to a second set of frequency-domain vectors of the N sets of frequency-domain vectors, the first set of space-domain vectors corresponding to a second set of spatial-frequency combining coefficients of the N sets of spatial-frequency combining coefficients, the P sets of frequency-domain vectors including P sets of frequency-domain vectors of the first set of frequency-domain vectors₁A frequency domain vector and P in the second set of frequency domain vectors₂A frequency domain vector, the K space-frequency combining coefficients including K in the first set of space-frequency combining coefficients₁A space-frequency combining coefficient and K in the second set of space-frequency combining coefficients₂And space-frequency combining coefficients. The indication of the Q spatial vectors may respectively indicate an index of a spatial vector corresponding to each transmission layer, or respectively indicate an index of a spatial vector corresponding to each spatial vector set. Each transmission layer may correspond to the same number of spatial vectors or different numbers of spatial vectors. For example, each transmission layer corresponds to 2L space vectors. Or the larger the transmission layer index is, the smaller the corresponding space vector number is. The index indicating the space vector corresponding to each transmission layer or each space vector set can be indicated by adopting a combination number mode, namely the length of the information bit for indicating X space vector indexes is

It should be noted that Q space vectors reported by the terminal device to the network device are determined from space vectors corresponding to multiple transmission layers, P frequency vectors reported by the terminal device to the network device are determined from frequency vectors corresponding to multiple transmission layers, and K space-frequency combining coefficients reported by the terminal device to the network device are determined from space-frequency combining coefficients corresponding to multiple transmission layers.

When the terminal device determines N space vector sets, N frequency domain vector sets, and N space-frequency combining coefficient sets, the number of space vectors included in each space vector set, the number of frequency domain vectors included in each frequency domain vector set, the number of space-frequency combining coefficients included in each space-frequency combining coefficient set, and the number of quantization bits corresponding to the space-frequency combining coefficients in each space-frequency combining coefficient set may be indicated by the network device through signaling, or may be pre-configured, or may be determined based on a preset rule, where the preset rule is consistent for the terminal device and the network device. For example, the number of spatial vectors included in each spatial vector set, the number of frequency domain vectors included in each frequency domain vector set, and the number of space-frequency combining coefficients included in each space-frequency combining coefficient set may be distributed according to a predefined proportion. Or the number of space vectors contained in each space vector set, the number of frequency domain vectors contained in each frequency domain vector set, the number of space-frequency combining coefficients contained in each space-frequency combining coefficient set, and the quantization bit number corresponding to the space-frequency combining coefficients in each space-frequency combining coefficient set can be distributed according to the number of transmission layers and preset values.

It should be noted that, the above description is only given by taking as an example that the network device indicates the number of spatial vectors corresponding to each transmission layer through the second indication information, and indicates the number of spatial vectors included in each spatial vector set, the number of frequency domain vectors included in each frequency domain vector set, and the number of space-frequency combining coefficients included in each space-frequency combining coefficient set, but the present invention is not limited thereto.

For example, the network device may indicate, by the second indication information, the number of spatial vectors corresponding to each transmission layer, only the number of spatial vectors included in a part of the set of spatial vectors, only the number of frequency domain vectors included in a part of the set of frequency domain vectors, and/or only the number of space-frequency combining coefficients included in a part of the set of space-frequency combining coefficients, for example, the terminal device may determine, according to the number of spatial vectors corresponding to each transmission layer and the number of spatial vectors included in a part of the set of spatial vectors, the number of spatial vectors included in another part of the set of spatial vectors, and/or the terminal device may determine, according to the number of frequency domain vectors corresponding to each transmission layer and the number of frequency domain vectors included in a part of the set of frequency domain vectors, the number of frequency domain vectors included in another part of the set of frequency domain vectors, and/or the terminal device may determine the number of space-frequency combining coefficients included in another part of the space-frequency combining coefficient set according to the number of space-frequency combining coefficients corresponding to each transmission layer indicated by the network device and the number of space-frequency combining coefficients included in the part of the space-frequency combining coefficient set.

Method 200 may also include step 210 prior to step 220 when indicated by signaling by the network device.

In step 210, the network device sends second indication information to the terminal device, and accordingly, the terminal device receives the second indication information sent by the network device, where the second indication information is used to indicate at least one of the following:

the number of space-frequency vectors in the first set of space-frequency vectors, the number of space-frequency vectors in the second set of space-frequency vectors, the number of frequency-frequency vectors in the first set of frequency-frequency vectors, the number of frequency-frequency vectors in the second set of frequency-frequency vectors, the number of space-frequency combining coefficients in the first set of space-frequency combining coefficients, and the number of space-frequency combining coefficients in the second set of space-frequency combining coefficients.

For example, in order to make the number of bits carrying the information corresponding to the first space vector set in the first indication information larger than the number of bits carrying the information corresponding to the second space vector set, the network device may configure a larger number of frequency domain vectors for the first space vector set and a smaller number of frequency domain vectors for the second space vector set through the second indication information, that is, the number P of frequency domain vectors included in the first frequency domain vector set ₁Is greater than the number P of frequency domain vectors included in the second set of frequency domain vectors₂。

Further, the network device may be configured to determine, for each of the first set of spatial vectors, a second indication informationThe space domain vectors are all configured with a large number of frequency domain vectors, and each space domain vector in the second space domain vector set is configured with a small number of frequency domain vectors. For example, each spatial vector in the first set of spatial vectors uses the same number of frequency domain vectors, and the number of frequency domain vectors corresponding to each spatial vector is S₁Each space domain vector in the second space domain vector set adopts the same number of frequency domain vectors, and the number of the frequency domain vectors corresponding to each space domain vector is S₂Then S is₁>S₂。

It should be noted that the number of frequency domain vectors in each frequency domain vector set indicated by the first indication information may be an upper limit of the number of frequency domain vectors in the frequency domain vector set indicated by the second indication information. That is, the number of frequency domain vectors reported by the terminal device through the first indication information may be less than or equal to the number of frequency domain vectors configured by the network device through the second indication information.

In addition, in order to make the number of bits carrying the information corresponding to the first space vector set in the first indication information greater than the number of bits carrying the information corresponding to the second space vector set, the network device may configure a larger number of space-frequency combining coefficients for the first space vector set and a smaller number of space-frequency combining coefficients for the second space vector set through the second indication information, that is, the number of space-frequency combining coefficients included in the first space-frequency combining coefficient set is greater than the number of space-frequency combining coefficients included in the second space-frequency combining coefficient set.

It should be noted that the number of space-frequency combining coefficients in each space-frequency combining coefficient set indicated by the first indication information may be an upper limit of the number of space-frequency combining coefficients in the space-frequency combining coefficient set indicated by the second indication information. That is, the number of the space-frequency combining coefficients reported by the terminal device through the first indication information may be less than or equal to the number of the space-frequency combining coefficients configured by the network device through the second indication information.

It is noted that the number of frequency domain combining coefficients may be p times the frequency domain unit, p <1 and p may take on the value 3/4, 1/2, 1/4 or 1/8. Furthermore, the number of space-frequency combining coefficients may be β times the number of space-frequency vector pairs, β <1 and may take on values of 3/4, 1/2, 1/4 or 1/8. Therefore, the second indication information may also indicate the above-described scale factors p and β.

In addition, in order to make the number of bits carrying the information corresponding to the first space vector set in the first indication information greater than the number of bits carrying the information corresponding to the second space vector set, the network device may allocate a greater number of quantization bits to each space-frequency combining coefficient in the first space-frequency combining coefficient set through the second indication information, that is, the number of quantization bits of each space-frequency combining coefficient in the first space-frequency combining coefficient set is greater than the number of quantization bits of each space-frequency combining coefficient in the second space-frequency combining coefficient set.

In an embodiment of the present application, the quantization bit of each space-frequency combination coefficient in the first space-frequency combination coefficient set includes at least one of an amplitude quantization bit and a phase quantization bit, and the quantization bit of each space-frequency combination coefficient in the second space-frequency combination coefficient set includes at least one of an amplitude quantization bit and a phase quantization bit. The amplitude quantization bit may be the number of bits required to quantize the amplitude value corresponding to each space-frequency merging coefficient, or may be the sum of the wideband amplitude value of the space-frequency vector corresponding to the space-frequency merging coefficient and the number of bits required to quantize the differential amplitude value corresponding to the space-frequency merging coefficient.

For example, in order to make the number of bits carrying the information corresponding to the first space vector set in the first indication information greater than the number of bits carrying the information corresponding to the second space vector set, the network device may allocate a greater number of amplitude quantization bits to each space-frequency combining coefficient in the first space-frequency combining coefficient set through the second indication information or a preset rule, that is, the number of amplitude quantization bits of each space-frequency combining coefficient in the first space-frequency combining coefficient set is greater than the number of amplitude quantization bits of each space-frequency combining coefficient in the second space-frequency combining coefficient set; or, a greater number of phase quantization bits are allocated to each space-frequency combining coefficient in the first space-frequency combining coefficient set, that is, the number of phase quantization bits of each space-frequency combining coefficient in the first space-frequency combining coefficient set is greater than the number of phase quantization bits of each space-frequency combining coefficient in the second space-frequency combining coefficient set; alternatively, the terminal device may allocate a greater number of phase quantization bits and amplitude quantization bits to each space-frequency combining coefficient in the first space-frequency combining coefficient set, that is, the number of phase quantization bits of each space-frequency combining coefficient in the first space-frequency combining coefficient set is greater than the number of phase quantization bits of each space-frequency combining coefficient in the second space-frequency combining coefficient set, and the number of amplitude quantization bits of each space-frequency combining coefficient in the first space-frequency combining coefficient set is greater than the number of amplitude quantization bits of each space-frequency combining coefficient in the second space-frequency combining coefficient set.

It should be noted that the amplitude quantization bits may include a wideband amplitude quantization bit and a differential amplitude quantization bit. In this case, the above-mentioned allocating a larger number of amplitude quantization bits to each space-frequency combination coefficient in the first set of space-frequency combination coefficients may be understood as: allocating a greater number of quantization bits to the wideband amplitude and/or the differential amplitude of each space-frequency combination coefficient in the first space-frequency combination coefficient set; accordingly, a smaller number of amplitude quantization bits are allocated to each space-frequency combination coefficient in the second set of space-frequency combination coefficients, which can be understood as: a smaller number of quantization bits is allocated to the wideband amplitude and/or the differential amplitude of each space-frequency combination coefficient in the second set of space-frequency combination coefficients.

In general, when the terminal device reports N space vector sets, N frequency domain vector sets, and N space-frequency combining coefficient sets to the network device through the first indication information, the number of space vectors included in each space vector set is consistent with the number of space vectors configured for the corresponding space vector set by the network device through the second indication information, the number of frequency domain vectors included in each frequency domain vector set is consistent with the number of frequency domain vectors configured for the corresponding frequency domain vector set by the network device through the second indication information, and the number of space-frequency combining coefficient sets included in each space-frequency combining coefficient set is consistent with the number of space-frequency combining coefficient sets configured for the corresponding space-frequency combining coefficient set by the network device through the first indication information.

For example, the number of frequency domain vectors configured for the first space vector set by the network device through the second indication information is P₁The number of the space domain vectors configured for the second frequency domain vector set by the network equipment is P₂The number of frequency domain vectors in the first frequency domain vector set included in the first indication information sent by the terminal device to the network device is also P₁The number of frequency domain vectors in the second set of frequency domain vectors included in the first indication information is also P₂(ii) a The number of the space-frequency merging coefficients configured for the first space-frequency merging coefficient set by the network equipment is K₁The number of the space-frequency merging coefficients configured by the network device for the second space-frequency merging coefficient set is K₂The number of space-domain vectors in the first space-frequency combining coefficient set included in the first indication information sent by the terminal device to the network device is also K₁The number of space-frequency vectors in the second set of space-frequency combining coefficients included in the first indication information is also K₂。

In this embodiment of the application, when the terminal device reports the frequency domain vector sets to the network device through the first indication information, the number of frequency domain vectors included in each frequency domain vector set may be smaller than the number of frequency domain vectors configured for the frequency domain vector set by the network device, that is, the number of frequency domain vectors included in each frequency domain vector set configured for the terminal device by the network device is the maximum value of the number of frequency domain vectors actually included in each frequency domain vector set reported to the network device by the terminal device, and at this time, the terminal device may also report the number of actually reported frequency domain vectors to the network device through the first indication information.

When the terminal device reports the space-frequency combining coefficient set to the network device through the first indication information, the number of space-frequency combining coefficients included in each space-frequency combining coefficient set may be smaller than the number of space-frequency combining coefficients configured for the space-frequency combining coefficient set by the network device, that is, the number of space-frequency combining coefficients included in each space-frequency combining coefficient set configured for the terminal device by the network device is the maximum value of the number of space-frequency combining coefficients actually included in each space-frequency combining coefficient set reported to the network device by the terminal device, and at this time, the terminal device may also report the number of space-frequency combining coefficients actually reported to the network device through the first indication information.

When the terminal device reports the quantization information of the space-frequency combination coefficient to the network device through the first indication information, the actually used quantization bit number may be smaller than or equal to the quantization bit number allocated by the network device through the second indication information, that is, the quantization bit number configured by the network device for the space-frequency combination coefficient in each space-frequency combination coefficient set of the terminal device is the maximum value of the actually used quantization bit number when the terminal device reports the space-frequency combination coefficient in each space-frequency combination coefficient set to the network device.

In this embodiment of the present application, the frequency domain vectors corresponding to any two spatial vectors in the same spatial vector set may be completely the same, or may be partially the same, or may be completely different.

For example, it is assumed that each space vector in the first space vector set corresponds to S frequency domain vectors, and if S frequency domain vectors corresponding to any two space vectors in the first space vector set are completely the same, the number P of frequency domain vectors included in the first frequency domain vector set reported to the network device by the terminal device is₁Equal to S, that is, only reporting the S frequency domain vectors aiming at all the space domain vectors in the first space domain vector set; if the number of the frequency domain vectors corresponding to two space domain vectors in the first space domain vector set is S, and the S frequency domain vectors are not completely the same or completely different, the number P of the frequency domain vectors in the first frequency domain vector set reported to the network device by the terminal device is P₁Is equal to S and the number Q of space vectors in the first space vector set₁The product of (a) and (b), that is, for each space domain vector in the first space domain vector set, S frequency domain vectors corresponding to each space domain vector are reported, wherein S is greater than or equal to 1. If the number of the frequency domain vectors corresponding to two space domain vectors in the first space domain vector set is not completely equal, the number of the frequency domain vectors corresponding to the ith space domain vector is S _iAnd the frequency domain vectors corresponding to the two space domain vectors are not completely the same or completely different, and the number P of the frequency domain vectors included in the first frequency domain vector set reported to the network device by the terminal device₁Equal to the number of frequency domain vectors corresponding to the space domain vectors included in the first set of space domain vectorsSum of eyes

That is, for each space domain vector in the first space domain vector set, S corresponding to each space domain vector is reported_iA frequency domain vector of, wherein S_iGreater than or equal to 1.

For example, assume that each space vector in the second space vector set corresponds to R frequency domain vectors, and if R frequency domain vectors corresponding to any two space vectors in the second space vector set are completely the same, the number P of frequency domain vectors included in the second frequency domain vector set reported to the network device by the terminal device is₂Equal to R, that is, only reporting the R frequency domain vectors aiming at all the space domain vectors in the second space domain vector set; if the number of the frequency domain vectors corresponding to two space domain vectors in the second space domain vector set is R, and the R frequency domain vectors are not completely the same or different, the number P of the frequency domain vectors in the second frequency domain vector set reported to the network device by the terminal device ₂Equal to R and the number Q of space vectors included in the second set of space vectors₂And (3) reporting R frequency domain vectors corresponding to each space domain vector aiming at each space domain vector in the second space domain vector set, wherein R is greater than or equal to 1. If the number of the frequency domain vectors corresponding to two space domain vectors in the second space domain vector set is not completely equal, the number of the frequency domain vectors corresponding to the ith space domain vector is R_iAnd the frequency domain vectors corresponding to the two space domain vectors are not completely the same or completely different, and the number P of the frequency domain vectors included in the first frequency domain vector set reported to the network device by the terminal device₁Is equal to the sum of the corresponding frequency domain vectors of the spatial vectors included in the first set of spatial vectors

That is, for each space domain vector in the first space domain vector set, reporting the R corresponding to each space domain vector_iA frequency domain vector, wherein R_iGreater than or equal to 1.

The following describes a method for generating the first indication information by the terminal device in detail for different scenarios.

First, in the embodiment of the present application, the larger the transmission layer index is, the smaller the channel matrix eigenvalue or signal to interference plus noise ratio (SINR) corresponding to the transmission layer is, for example, the channel matrix eigenvalue or SINR corresponding to the transmission layer #2 is smaller than the channel matrix eigenvalue or SINR corresponding to the transmission layer # 1.

The number of transmission layers in scene 1 is 2, and the value of N is 2.

In this embodiment of the present application, 2 transmission layers may be denoted as a transmission layer #1 and a transmission layer #2, at this time, a value of N may be 2, the N space vector sets include a first space vector set and a second space vector set, the N frequency domain vector sets include a first frequency domain vector set and a second frequency domain vector set, the N space-frequency merging coefficient sets include a first space-frequency merging coefficient set and a second space-frequency merging coefficient set, and a bit number of information corresponding to the first space vector set in first indication information generated by the terminal device is greater than a bit number of information corresponding to the second space vector set.

The terminal device may determine the first set of spatial vectors and the second set of spatial vectors from the spatial vector corresponding to the transmission layer #1 and the spatial vector corresponding to the transmission layer # 2. For example, the terminal device may determine a partial vector of the spatial vectors corresponding to the transmission layer #1 and a partial vector of the spatial vectors corresponding to the transmission layer #2 as a first spatial vector set, and determine another partial vector of the spatial vectors corresponding to the transmission layer #1 and another partial vector of the spatial vectors corresponding to the transmission layer #2 as a second spatial vector set.

The terminal device may divide the space domain vector corresponding to the transmission layer #1 into two parts according to the strength of the space domain vector, and divide the space domain vector corresponding to the transmission layer #2 into two parts according to the strength of the space domain vector. For example, the terminal device may divide the space domain vector corresponding to the transmission layer #1 into two parts according to the magnitude value of the space-frequency combining coefficient, the square of the magnitude value, or the wideband magnitude value corresponding to the transmission layer #1, and may divide the space domain vector corresponding to the transmission layer #2 into two parts according to the magnitude value of the space-frequency combining coefficient, the square of the magnitude value, or the wideband magnitude value corresponding to the transmission layer # 2.

For example, the terminal device may sort the space domain vector corresponding to the transmission layer #1 according to the magnitude relation of the magnitude value, the square of the magnitude value, or the wide-band magnitude value of the space-frequency combining coefficient corresponding to the space domain vector, and when the magnitude value, the square of the magnitude value, or the wide-band magnitude value of the space-frequency combining coefficient corresponding to the space domain vector is larger, it represents that the space domain vector is stronger, and when the magnitude value, the square of the magnitude value, or the wide-band magnitude value of the space-frequency combining coefficient corresponding to the space domain vector is smaller, it represents that the space domain vector is weaker.

Assuming that the spatial vectors corresponding to the transmission layer #1 are the spatial vector #3 corresponding to the transmission layer #1, the spatial vector #4 corresponding to the transmission layer #1, the spatial vector #2 corresponding to the transmission layer #1, and the spatial vector #1 corresponding to the transmission layer #1 according to the above method, the terminal device may divide the spatial vector #3 corresponding to the transmission layer 1 and the spatial vector #4 corresponding to the transmission layer #1 into a stronger group, and divide the spatial vector #2 corresponding to the transmission layer #1 and the spatial vector #1 corresponding to the transmission layer #1 into a weaker group. Assuming that the spatial vectors corresponding to the transmission layer #2 are the spatial vector #4 corresponding to the transmission layer #2, the spatial vector #2 corresponding to the transmission layer #2, the spatial vector #3 corresponding to the transmission layer #2, and the spatial vector #1 corresponding to the transmission layer #2 according to the above method, the terminal device may divide the spatial vector #4 corresponding to the transmission layer #2 and the spatial vector #2 corresponding to the transmission layer #2 into a stronger group, and divide the spatial vector #3 corresponding to the transmission layer #2 and the spatial vector #1 corresponding to the transmission layer #2 into a weaker group.

The terminal device may merge the stronger set of spatial vectors corresponding to the transmission layer #1 and the stronger set of spatial vectors corresponding to the transmission layer #2 into a first set of spatial vectors (i.e., the spatial vectors in the first set of spatial vectors are spatial vector #3 corresponding to the transmission layer #1, spatial vector #4 corresponding to the transmission layer #2, and spatial vector #2 corresponding to the transmission layer #2), at which time L ₁Is 4, a weaker set of space vectors corresponding to the transport layer #1 is paired with the transport layer #2The corresponding weaker set of space vectors is merged into a second set of space vectors (i.e., the space vectors in the second set of space vectors are space vector #2 for transport layer 1, space vector #1 for transport layer 1, space vector #3 for transport layer #2, and space vector #1 for transport layer # 2), at which point L₂Is 4. At this time, the Q space vectors reported to the network device by the aforementioned terminal device are the sum of the numbers of space vectors included in the first space vector set and the second space vector set.

Assuming that the spatial vectors corresponding to the transmission layer #1 are the spatial vector #3 corresponding to the transmission layer #1, the spatial vector #4 corresponding to the transmission layer #1, the spatial vector #2 corresponding to the transmission layer #1, and the spatial vector #1 corresponding to the transmission layer #1 according to the above method, the terminal device may divide the spatial vector #3 corresponding to the transmission layer 1 and the spatial vector #4 corresponding to the transmission layer #1 into a stronger group, and divide the spatial vector #2 corresponding to the transmission layer 1 and the spatial vector #1 corresponding to the transmission layer #1 into a weaker group. Assuming that the spatial vectors corresponding to the transmission layer #2 are the spatial vector #4 corresponding to the transmission layer #2, the spatial vector #6 corresponding to the transmission layer #2, the spatial vector #5 corresponding to the transmission layer #2, and the spatial vector #3 corresponding to the transmission layer #2 according to the above method, the terminal device may divide the spatial vector #4 corresponding to the transmission layer #2 and the spatial vector #6 corresponding to the transmission layer #2 into a stronger group, and divide the spatial vector #5 corresponding to the transmission layer #2 and the spatial vector #3 corresponding to the transmission layer #2 into a weaker group.

The terminal device may merge the stronger set of spatial vectors corresponding to the transmission layer #1 and the stronger set of spatial vectors corresponding to the transmission layer #2 into a first set of spatial vectors (i.e., the spatial vectors in the first set of spatial vectors are spatial vector #3 corresponding to the transmission layer 1, spatial vector #4 corresponding to the transmission layer #2, and spatial vector #6 corresponding to the transmission layer # 2), at which time L₁Is 4, the weaker set of spatial vectors corresponding to the transmission layer #1 and the weaker set of spatial vectors corresponding to the transmission layer #2 are merged into a second set of spatial vectors (i.e., the spatial vectors in the second set of spatial vectors are the spatial vector #2 corresponding to the transmission layer 1, the spatial vectors in the second set of spatial vectors are transmittedSpatial vector #1 for layer 1, spatial vector #5 for transport layer #2, and spatial vector #3 for transport layer # 2), in which case L₂Is 4. At this time, the Q space vectors reported to the network device by the aforementioned terminal device are the sum of the numbers of space vectors included in the first space vector set and the second space vector set. It should be noted that, when the space vector corresponding to the transmission layer #1 is completely the same as the space vector corresponding to the transmission layer #2, the terminal device may only divide the space vector corresponding to the transmission layer #1 into two parts according to the strength of the space vector, or the terminal device may only divide the space vector corresponding to the transmission layer #2 into two parts according to the strength of the space vector.

For example, the space vector corresponding to the transmission layer #1 is a space vector #1 to a space vector #6, the space vector corresponding to the transmission layer #2 is also a space vector #1 to a space vector #6, and the terminal device may divide the space vector corresponding to the transmission layer #1 into two parts according to the magnitude value, the square of the magnitude value, or the wide-band magnitude value of the space-frequency combining coefficient corresponding to each space vector of the transmission layer #1, or may divide the space vector corresponding to the transmission layer #2 into two parts according to the magnitude value, the square of the magnitude value, or the wide-band magnitude value of the space-frequency combining coefficient corresponding to each space vector of the transmission layer # 2. In addition, the strength of the same space domain vector corresponding to the two transmission layers (for example, the amplitude value of the space-frequency combination coefficient, the square of the amplitude value, or the average value of the wide-band amplitude value corresponding to each space domain vector corresponding to the two transmission layers) can be comprehensively considered, and the space domain vector #1 to the space domain vector #6 can be divided into two parts.

Assuming that the space domain vector corresponding to the transmission layer #1 is the space domain vector #2 corresponding to the transmission layer #1, the space domain vector #4 corresponding to the transmission layer #1, the space domain vector #3 corresponding to the transmission layer #1, the space domain vector #1 corresponding to the transmission layer #1, the space domain vector #5 corresponding to the transmission layer #1, and the space domain vector #6 corresponding to the transmission layer #1 according to the above method, the terminal device may divide the space domain vector #2 corresponding to the transmission layer #1, the space domain vector #3 corresponding to the transmission layer #1, and the space domain vector #4 corresponding to the transmission layer #1 into a stronger group, and divide the space domain vector #1 corresponding to the transmission layer #1, the space domain vector #5 corresponding to the transmission layer #1, and the space domain vector #6 corresponding to the transmission layer #1 into a weaker group.

The terminal device may determine the stronger set of space vectors as a first set of space vectors, at which point L₁Is 3, the weaker set of space vectors is determined as a second set of space vectors, at which time L₂Is 3. At this time, the Q space vectors reported to the network device by the aforementioned terminal device are the sum of the numbers of space vectors included in the first space vector set and the second space vector set.

For the determined first and second sets of spatial vectors, the terminal device may determine P for the first set of spatial vectors ₁A frequency domain vector, determining P for the second set of space domain vectors₂A frequency domain vector, P₁The frequency domain vectors form the first set of frequency domain vectors, P₂The frequency domain vectors form the second set of frequency domain vectors. At this time, the P frequency domain vectors reported to the network device by the aforementioned terminal device are the frequency domain vectors included in the first frequency domain vector set and the second frequency domain vector set.

In order to make the number of bits carrying the information corresponding to the first space vector set in the first indication information larger than the number of bits carrying the information corresponding to the second space vector set, the terminal device may determine a greater number of frequency domain vectors, that is, P frequency domain vectors, for the first space vector set based on the second indication information sent by the network device or based on pre-configuration₁Greater than P₂The number of frequency domain vectors in the first set of frequency domain vectors indicated in the first indication informationThe number is greater than the number of frequency domain vectors in the second set of frequency domain vectors indicated in the first indication information.

For example, if the first indication information carries the index numbers of the frequency domain vectors included in the first frequency domain vector set and the index numbers of the frequency domain vectors included in the second frequency domain vector set, the number of the frequency domain vectors in the first frequency domain vector set indicated in the first indication information is greater than the number of the frequency domain vectors in the second frequency domain vector set indicated in the first indication information, which means that: the number of the index numbers of the frequency domain vectors included in the first frequency domain vector set carried in the first indication information is greater than the number of the index numbers of the frequency domain vectors included in the second frequency domain vector set carried in the first indication information, so that the number of bits carrying the information corresponding to the first space domain vector set (for example, the index numbers of the frequency domain vectors corresponding to the first space domain vector set) in the first indication information is greater than the number of bits carrying the information corresponding to the second space domain vector set (for example, the index numbers of the frequency domain vectors corresponding to the second space domain vector set). Further, the number of the index numbers of the frequency domain vectors corresponding to each space vector in the first space vector set carried in the first indication information is greater than the number of the index numbers of the frequency domain vectors corresponding to each space vector in the second space vector set carried in the first indication information, so that the number of bits carrying the information corresponding to the first space vector set in the first indication information is greater than the number of bits carrying the information corresponding to the second space vector set.

In addition, for the determined first space vector set and the second space vector set, the terminal device may determine K for the first space vector set from space-frequency merging coefficients determined by the space vector reported to the network device and the frequency vector reported to the network device₁Determining K space-frequency merging coefficients from the K space-frequency merging coefficients for a second set of space vectors₂Space-frequency combining coefficient, K₁The space-frequency combining coefficients form a first set of space-frequency combining coefficients, K₂The space-frequency combining coefficients form a second set of space-frequency combining coefficients. At this time, the K space-frequency combining coefficients reported by the aforementioned terminal device to the network device are the first space-frequency combining systemThe number set and the space-frequency combining coefficients comprised in the second set of space-frequency combining coefficients.

In order to make the number of bits carrying the information corresponding to the first space vector set in the first indication information larger than the number of bits carrying the information corresponding to the second space vector set, the terminal device may determine a greater number of space-frequency combining coefficients, that is, K, for the first space-frequency combining coefficient set based on the second indication information sent by the network device or based on a pre-configuration₁Greater than K₂The number of the space-frequency combining coefficients in the first space-frequency combining coefficient set indicated in the first indication information is more than the number of the space-frequency combining coefficients in the second space-frequency combining coefficient set indicated in the first indication information.

For example, the first indication information carries quantization information of the space-frequency combining coefficients included in the first space-frequency combining coefficient and quantization information of the space-frequency combining coefficients included in the second space-frequency combining coefficient set, and the fact that the number of the space-frequency combining coefficients in the first space-frequency combining coefficient set indicated in the first indication information is greater than the number of the space-frequency combining coefficients in the second space-frequency combining coefficient set indicated in the first indication information means that: the number of pieces of quantization information of the space-frequency merging coefficients included in the first space-frequency merging coefficient set carried in the first indication information is greater than the number of pieces of quantization information of the space-frequency merging coefficients included in the second space-frequency merging coefficient set carried in the first indication information, so that the number of bits carrying information corresponding to the first space-frequency vector set (for example, quantization information of the space-frequency merging coefficients corresponding to the first space-frequency vector set) in the first indication information is greater than the number of bits carrying information corresponding to the second space-frequency vector set (for example, quantization information of the space-frequency merging coefficients corresponding to the second space-frequency vector set).

In addition, for the determined first and second sets of space-frequency combining coefficients, the terminal device may determine a larger number of quantization bits for each space-frequency combining coefficient in the first set of space-frequency combining coefficients based on second indication information sent by the network device or based on a pre-configuration, that is, the number of quantization bits of each space-frequency combining coefficient in the first set of space-frequency combining coefficients is greater than the number of quantization bits of each space-frequency combining coefficient in the second set of space-frequency combining coefficients, so that the number of bits carrying information corresponding to the first set of space-frequency vectors (e.g., quantization information of space-frequency combining coefficients corresponding to the first set of space-frequency vectors) in the first indication information is greater than the number of space-frequency vectors carrying information corresponding to the second set of space-frequency vectors (e.g., quantization information of space-frequency combining coefficients corresponding to the second set of space-frequency vectors).

The number of transmission layers in scene 2 is 3, and the value of N is 3.

In this embodiment of the application, 3 transmission layers may be denoted as a transmission layer #1, a transmission layer #2, and a transmission layer #3, at this time, a value of N may be 3, where the N space vector sets include a first space vector set, a second space vector set, and a third space vector set, the N frequency domain vector sets include a first frequency domain vector set, a second frequency domain vector set, and a third frequency domain vector set, the N space-frequency combining coefficient sets include a first space-frequency combining coefficient set, a second space-frequency combining coefficient set, and a third space-frequency combining coefficient set, at this time, the first indication information generated by the terminal device further includes information corresponding to the third space vector set, and a bit number of information corresponding to the third space vector set carried in the first indication information generated by the terminal device is smaller than a bit number of information corresponding to the first space vector set. Further, the number of bits carrying information corresponding to the third space vector set in the first indication information generated by the terminal device is smaller than the number of bits carrying information corresponding to the first space vector set and is greater than the number of bits carrying information corresponding to the second space vector set.

The terminal device may determine a first set of spatial vectors and a second set of spatial vectors from the spatial vectors corresponding to the transmission layer #1 and the spatial vectors corresponding to the transmission layer #2, and the terminal device may determine a third set of spatial vectors from the spatial vectors corresponding to the transmission layer # 3. For example, the terminal device may determine a partial vector of the spatial vectors corresponding to the transmission layer #1 and a partial vector of the spatial vectors corresponding to the transmission layer #2 as a first spatial vector set, and determine another partial vector of the spatial vectors corresponding to the transmission layer #1 and another partial vector of the spatial vectors corresponding to the transmission layer #2 as a second spatial vector set. And determining all the spatial vectors corresponding to the transmission layer #3 as a third spatial vector set.

The terminal device may divide the space vector corresponding to the transmission layer #1 into two parts according to the strength of the space vector according to the method described in the scene 1, divide the space vector corresponding to the transmission layer #2 into two parts according to the strength of the space vector, merge a group of stronger space vectors corresponding to the transmission layer #1 and a group of stronger space vectors corresponding to the transmission layer #2 into a first space vector set, merge a group of weaker space vectors corresponding to the transmission layer #1 and a group of weaker space vectors corresponding to the transmission layer #2 into a second space vector set, and determine all space vectors corresponding to the transmission layer #3 as a third space vector set. At this time, the Q space vectors reported to the network device by the aforementioned terminal device are the sum of the numbers of space vectors included in the first space vector set, the second space vector set, and the third space vector set.

The terminal device may determine a first spatial vector set from the spatial vector corresponding to the transmission layer #1 and the spatial vector corresponding to the transmission layer #2, a second spatial vector set from the spatial vector corresponding to the transmission layer #1 and the spatial vector corresponding to the transmission layer #2 and the spatial vector corresponding to the transmission layer #3, and a third spatial vector set from the spatial vector corresponding to the transmission layer # 3.

For example, the terminal device may determine a partial vector of the spatial vectors corresponding to the transmission layer #1 and a partial vector of the spatial vectors corresponding to the transmission layer #2 as a first spatial vector set, determine another partial vector of the spatial vectors corresponding to the transmission layer #1, another partial vector of the spatial vectors corresponding to the transmission layer #2, and a partial vector of the spatial vectors corresponding to the transmission layer #3 as a second spatial vector set, and determine another partial vector of the spatial vectors corresponding to the transmission layer #3 as a third spatial vector set.

The terminal device may divide the space vector corresponding to the transmission layer #1 into two parts according to the strength of the space vector according to the method described in the scene 1, divide the space vector corresponding to the transmission layer #2 into two parts according to the strength of the space vector, divide the space vector corresponding to the transmission layer #3 into two parts according to the strength of the space vector, merge a group of stronger space vectors corresponding to the transmission layer #1 and a group of stronger space vectors corresponding to the transmission layer #2 into a first space vector set, merge a group of weaker space vectors corresponding to the transmission layer #1, a group of weaker space vectors corresponding to the transmission layer #2 and a group of weaker space vectors corresponding to the transmission layer #3 into a second space vector set, and determine a group of stronger space vectors corresponding to the transmission layer #3 as a third space vector set. At this time, the Q space vectors reported to the network device by the aforementioned terminal device are the sum of the numbers of space vectors included in the first space vector set, the second space vector set, and the third space vector set.

In addition, the terminal device may determine a first spatial vector set from the spatial vectors corresponding to the transmission layer #1, and determine a second spatial vector set and a third spatial vector set from the spatial vectors corresponding to the transmission layer #2 and the transmission layer # 3.

For example, the terminal device may determine all spatial vectors corresponding to the transmission layer #1 as a first set of spatial vectors, determine a partial vector of the spatial vectors corresponding to the transmission layer #2 and a partial vector of the spatial vectors corresponding to the transmission layer #3 as a second set of spatial vectors, and determine another partial vector of the spatial vectors corresponding to the transmission layer #2 and another partial vector of the spatial vectors corresponding to the transmission layer #3 as a third set of spatial vectors.

The terminal device may divide the space vector corresponding to the transmission layer #2 into two parts according to the strength of the space vector according to the method described in the scene 1, divide the space vector corresponding to the transmission layer #3 into two parts according to the strength of the space vector, merge all the space vectors corresponding to the transmission layer #1 into a first space vector set, merge a weaker set of space vectors corresponding to the transmission layer #2 and a weaker set of space vectors corresponding to the transmission layer #3 into a second space vector set, and determine a stronger set of space vectors corresponding to the transmission layer #2 and a stronger set of space vectors corresponding to the transmission layer #3 as a third space vector set. At this time, the Q space vectors reported to the network device by the aforementioned terminal device are the sum of the numbers of space vectors included in the first space vector set, the second space vector set, and the third space vector set.

Further, the terminal device may determine a first spatial vector set and a second spatial vector set from spatial vectors corresponding to the transmission layer #1, and may determine a third spatial vector set from spatial vectors corresponding to the transmission layer #2 and the transmission layer # 3.

For example, the terminal device may determine a part of the spatial vectors corresponding to the transmission layer #1 as a first set of spatial vectors, determine another part of the spatial vectors corresponding to the transmission layer #1 as a second set of spatial vectors, and determine all the spatial vectors corresponding to the transmission layer #2 and all the spatial vectors corresponding to the transmission layer #3 as a third set of spatial vectors.

The terminal device may divide the space vector corresponding to the transmission layer #1 into two parts according to the strength of the space vector according to the method described in the scene 1, determine a first space vector set from a stronger set of space vectors corresponding to the transmission layer #1, determine a second space vector set from a weaker set of space vectors corresponding to the transmission layer #1, and determine all space vectors corresponding to the transmission layer #2 and all space vectors corresponding to the transmission layer #3 as a third space vector set. At this time, the Q space vectors reported to the network device by the aforementioned terminal device are the sum of the numbers of space vectors included in the first space vector set, the second space vector set, and the third space vector set.

For the determined first, second, and third sets of spatial vectors, the terminal device may determine P for the first set of spatial vectors₁Determining a Pth space vector set for the second space vector set₂Determining P for the third set of space vectors₃A frequency domain vector, P₁The frequency domain vectors form the first set of frequency domain vectors, P₂The frequency domain vectors form the second set of frequency domain vectors, P₃The frequency domain vectors form the set of third frequency domain vectors. At this time, the P frequency domain vectors reported to the network device by the aforementioned terminal device are the frequency domain vectors included in the first frequency domain vector set, the second frequency domain vector set, and the third frequency domain vector set.

In order to make the first indication information carry the bit number of the information corresponding to the third space vector setThe terminal device may determine a greater number of frequency domain vectors for the first space vector set based on second indication information sent by the network device or based on pre-configuration, allocate a smaller number of frequency domain vectors to the second space vector set, and allocate the number of frequency domain vectors to the third space vector set between the number of frequency domain vectors allocated to the first space vector set and the number of frequency domain vectors allocated to the second space vector set, that is, P is the number of bits less than the number of bits carrying information corresponding to the first space vector set and greater than the number of bits carrying information corresponding to the second space vector set ₃Greater than P₂And is less than P₁The number of frequency domain vectors in the third set of frequency domain vectors indicated in the first indication information is greater than the number of frequency domain vectors in the second set of frequency domain vectors indicated in the first indication information and is less than the number of frequency domain vectors in the first set of frequency domain vectors indicated in the first indication information.

For example, the first indication information carries the index number of the frequency domain vector included in the first frequency domain vector set, the index number of the frequency domain vector included in the second frequency domain vector set, and the index number of the frequency domain vector included in the third frequency domain vector set, and then the number of the frequency domain vectors in the third frequency domain vector set indicated in the first indication information is greater than the number of the frequency domain vectors in the second frequency domain vector set indicated in the first indication information, and is less than the number of the frequency domain vectors in the first frequency domain vector set indicated in the first indication information means: the number of the index numbers of the frequency domain vectors included in the third frequency domain vector set carried in the first indication information is greater than the number of the index numbers of the frequency domain vectors included in the second frequency domain vector set carried in the first indication information and is less than the number of the index numbers of the frequency domain vectors included in the first frequency domain vector set carried in the first indication information, so that the number of bits carrying the information corresponding to the third spatial domain vector set (for example, the index numbers of the frequency domain vectors corresponding to the third spatial domain vector set) in the first indication information is greater than the number of bits carrying the information corresponding to the second spatial domain vector set (for example, the index numbers of the frequency domain vectors corresponding to the second spatial domain vector set) and is less than the number of bits carrying the information corresponding to the first spatial domain vector set (for example, the index numbers of the frequency domain vectors corresponding to the first spatial domain vector set).

In addition, for the determined first set of spatial vectors and the determined second set of spatial vectors, the terminal device may determine K for the first set of spatial vectors₁Determining K for the second space vector set based on the space-frequency merging coefficients₂Determining K for the third space vector set based on the space-frequency merging coefficients₃Space-frequency combining coefficient, K₁The space-frequency combining coefficients form a first set of space-frequency combining coefficients, K₂The space-frequency combining coefficients form a second set of space-frequency combining coefficients, K₃The space-frequency combining coefficients form a third set of space-frequency combining coefficients. At this time, the K space-frequency combining coefficients reported by the terminal device to the network device are the space-frequency combining coefficients included in the first space-frequency combining coefficient set, the second space-frequency combining coefficient set, and the third space-frequency combining coefficient set.

In order to make the number of bits carrying information corresponding to the third set of space vectors in the first indication information smaller than the number of bits carrying information corresponding to the first set of space vectors and larger than the number of bits carrying information corresponding to the second set of space vectors, the terminal device may determine, based on second indication information sent by the network device or based on a pre-configuration, a greater number of space-frequency combining coefficients for the first set of space-frequency combining coefficients, determine a greater number of space-frequency combining coefficients for the second set of space-frequency combining coefficients, where the number of space-frequency combining coefficients determined for the third set of space-frequency combining coefficients is between the number of space-frequency combining coefficients determined for the first set of space-frequency combining coefficients and the number of space-frequency combining coefficients determined for the second set of space-frequency combining coefficients, i.e., K ₃Greater than K₂And K is₃Less than K₁The number of the space-frequency combining coefficients in the third space-frequency combining coefficient set indicated in the first indication information is greater than the number of the space-frequency combining coefficients in the second space-frequency combining coefficient set indicated in the first indication information and is less than the number of the space-frequency combining coefficients in the first space-frequency combining coefficient set indicated in the first indication information.

For example, the first indication information carries quantization information of the space-frequency combining coefficients included in the first space-frequency combining coefficient, quantization information of the space-frequency combining coefficients included in the second space-frequency combining coefficient set, and quantization information of the space-frequency combining coefficients included in the third space-frequency combining coefficient set, and then the number of the space-frequency combining coefficients in the third space-frequency combining coefficient set indicated in the first indication information is greater than the number of the space-frequency combining coefficients in the second space-frequency combining coefficient set indicated in the first indication information, and is less than the number of the space-frequency combining coefficients in the first space-frequency combining coefficient set indicated in the first indication information means: the number of the quantization information of the space-frequency combining coefficients included in the third set of space-frequency combining coefficients carried in the first indication information is larger than the number of the quantization information of the space-frequency combining coefficients included in the second set of space-frequency combining coefficients carried in the first indication information, and is smaller than the amount of quantization information of the space-frequency combining coefficients included in the first set of space-frequency combining coefficients carried in the first indication information, so that the number of bits carrying information corresponding to the third set of space-frequency vectors (e.g., quantized information of space-frequency coefficients corresponding to the third set of space-frequency vectors) in the first indication information is greater than the number of bits carrying information corresponding to the second set of space-frequency vectors (e.g., quantized information of space-frequency coefficients corresponding to the second set of space-frequency vectors), and is less than the bit number of the information (for example, the quantization information of the space-frequency merging coefficient corresponding to the first space-domain vector set) corresponding to the first space-domain vector set carried in the first indication information.

In addition, for the determined first, second and third sets of space-frequency combining coefficients, the terminal device may determine a larger number of quantization bits for each space-frequency combining coefficient in the first set of space-frequency combining coefficients, a smaller number of quantization bits for each space-frequency combining coefficient in the second set of space-frequency combining coefficients, the number of quantization bits determined for each space-frequency combining coefficient in the third set of space-frequency combining coefficients being between the number of quantization bits determined for each space-frequency combining coefficient in the first set of space-frequency combining coefficients and the number of quantization bits determined for each space-frequency combining coefficient in the second set of space-frequency combining coefficients, i.e. the quantization for each space-frequency combining coefficient in the third set of space-frequency combining coefficients is greater than the number of quantization bits for each space-frequency combining coefficient in the second set of space-frequency combining coefficients, based on second indication information sent by the network device or based on a pre-configuration, and is smaller than the quantization bit number of each space-frequency merging coefficient in the first space-frequency merging coefficient set, so that the bit number of the first indication information carrying information corresponding to the third space-frequency vector set (for example, quantization information of the space-frequency merging coefficient corresponding to the third space-frequency vector set) is larger than the bit number of the first indication information carrying information corresponding to the second space-frequency vector set (for example, quantization information of the space-frequency merging coefficient corresponding to the second space-frequency vector set), and is smaller than the bit number of the first indication information carrying information corresponding to the first space-frequency vector set (for example, quantization information of the space-frequency merging coefficient corresponding to the first space-frequency vector set).

It should be noted that each space vector in the second space vector set may correspond to S identical frequency domain vectors, and in a specific implementation, only S frequency domain vectors may be reported for the second space vector set, or only the wideband amplitude value corresponding to each space vector may be reported for the second space vector set.

The number of transmission layers in scene 3 is 4, and the value of N is 3.

In this embodiment of the present application, 4 transmission layers may be denoted as a transmission layer #1, a transmission layer #2, a transmission layer #3, and a transmission layer #4, at this time, a value of N may be 3, where the N space vector sets include a first space vector set, a second space vector set, and a third space vector set, the N frequency vector sets include a first frequency vector set, a second frequency vector set, and a third frequency vector set, the N space-frequency merging coefficient sets include a first space-frequency merging coefficient set, a second space-frequency merging coefficient set, and a third space-frequency merging coefficient set, at this time, the first indication information generated by the terminal device further includes information corresponding to the third space vector set, and a bit number of information that carries the third space vector set in the first indication information generated by the terminal device is smaller than a bit number of information that carries the first space vector set. Further, the number of bits carrying information corresponding to the third space vector set in the first indication information generated by the terminal device is smaller than the number of bits carrying information corresponding to the first space vector set and is greater than the number of bits carrying information corresponding to the second space vector set.

The terminal device may determine a first spatial vector set and a second spatial vector set from the spatial vector corresponding to the transmission layer #1 and the spatial vector corresponding to the transmission layer #2, and the terminal device may determine a third spatial vector set from the spatial vector corresponding to the transmission layer #3 and the spatial vector corresponding to the transmission layer # 4.

For example, the terminal device may determine a partial vector of the spatial vectors corresponding to the transmission layer #1 and a partial vector of the spatial vectors corresponding to the transmission layer #2 as a first spatial vector set, determine another partial vector of the spatial vectors corresponding to the transmission layer #1 and another partial vector of the spatial vectors corresponding to the transmission layer #2 as a second spatial vector set, and determine all spatial vectors corresponding to the entire spatial vectors corresponding to the transmission layer #3 and the transmission layer #4 as a third spatial vector set.

The terminal device may divide the space vector corresponding to the transmission layer #1 into two parts according to the strength of the space vector according to the method described in the scene 1, divide the space vector corresponding to the transmission layer #2 into two parts according to the strength of the space vector, merge a group of stronger space vectors corresponding to the transmission layer #1 and a group of stronger space vectors corresponding to the transmission layer #2 into a first space vector set, merge a group of weaker space vectors corresponding to the transmission layer #1 and a group of weaker space vectors corresponding to the transmission layer #2 into a second space vector set, and determine all space vectors corresponding to the transmission layer #3 and all space vectors corresponding to the transmission layer #4 as a third space vector set. At this time, the Q space vectors reported to the network device by the aforementioned terminal device are the space vectors included in the first space vector set, the second space vector set, and the third space vector set. The terminal device may determine a first spatial vector set from the spatial vector corresponding to the transmission layer #1 and the spatial vector corresponding to the transmission layer #2, determine a second spatial vector set from the spatial vector corresponding to the transmission layer #1, the spatial vector corresponding to the transmission layer #2, the spatial vector corresponding to the transmission layer #3, and the spatial vector corresponding to the transmission layer #4, and determine a third spatial vector set from the spatial vector corresponding to the transmission layer #3 and the spatial vector corresponding to the transmission layer # 4.

For example, the terminal device may determine a partial vector of the spatial vectors corresponding to the transmission layer #1 and the transmission layer #2 as a first spatial vector set, determine another partial vector of the spatial vectors corresponding to the transmission layer #1, another partial vector of the spatial vectors corresponding to the transmission layer #2, and a partial vector of the spatial vectors corresponding to the partial vector of the transmission layer #3 and the transmission layer #4 as a second spatial vector set, and determine another partial vector of the spatial vectors corresponding to the other partial vector of the transmission layer #3 and the transmission layer #4 as a third spatial vector set.

The terminal device may divide the space domain vector corresponding to the transmission layer #1 into two parts according to the strength of the space domain vector, divide the space domain vector corresponding to the transmission layer #2 into two parts according to the strength of the space domain vector, divide the space domain vector corresponding to the transmission layer #3 into two parts according to the strength of the space domain vector, divide the space domain vector corresponding to the transmission layer #4 into two parts according to the strength of the space domain vector, merge a stronger set of space domain vectors corresponding to the transmission layer #1 and a stronger set of space domain vectors corresponding to the transmission layer #2 into a first space domain vector set, merge a weaker set of space domain vectors corresponding to the transmission layer #1, a weaker set of space domain vectors corresponding to the transmission layer #2, a weaker set of space domain vectors corresponding to the transmission layer #3 and a weaker set of space domain vectors corresponding to the transmission layer #4 into a second space domain set according to the method described in the scene 1, a stronger set of spatial vectors corresponding to transmission layer #3 and a stronger set of spatial vectors corresponding to transmission layer #4 are determined as a third set of spatial vectors. At this time, the Q space vectors reported to the network device by the aforementioned terminal device are the sum of the numbers of space vectors included in the first space vector set, the second space vector set, and the third space vector set.

For the determined first, second, and third sets of spatial vectors, the terminal device may determine P for the first set of spatial vectors₁A plurality of frequency domain vectors, P included in the second set of frequency domain vectors is determined for the second set of spatial vectors₂Determining P for the third set of space vectors₃A frequency domain vector, P₁A frequency domain vector constituting the firstSet of frequency domain vectors, P₂The frequency domain vectors form the second set of frequency domain vectors, P₃The frequency domain vectors form the set of third frequency domain vectors. At this time, the P frequency domain vectors reported to the network device by the aforementioned terminal device are the frequency domain vectors included in the first frequency domain vector set, the second frequency domain vector set, and the third frequency domain vector set.

In order to make the number of bits carrying information corresponding to the third set of space vectors in the first indication information smaller than the number of bits carrying information corresponding to the first set of space vectors and larger than the number of bits carrying information corresponding to the second set of space vectors, the terminal device may determine a larger number of frequency domain vectors for the first set of space vectors based on the second indication information sent by the network device or based on pre-configuration, allocate a smaller number of frequency domain vectors to the second set of space vectors, and allocate the number of frequency domain vectors to the third set of space vectors between the number of frequency domain vectors allocated to the first set of space vectors and the number of frequency domain vectors allocated to the second set of space vectors, that is, P ₃Greater than P₂And is less than P₁The number of frequency domain vectors in the third set of frequency domain vectors indicated in the first indication information is greater than the number of frequency domain vectors in the second set of frequency domain vectors indicated in the first indication information and is less than the number of frequency domain vectors in the first set of frequency domain vectors indicated in the first indication information.

In addition, for the determined first, second and third sets of spatial vectors, the terminal device may determine K for the first set of spatial vectors₁Determining K for the second space vector set based on the space-frequency merging coefficients₂Determining K for the third space vector set based on the space-frequency merging coefficients₃Space-frequency combining coefficient, K₁The space-frequency combining coefficients form a first set of space-frequency combining coefficients, K₂The space-frequency combining coefficients form a second set of space-frequency combining coefficients, K₃The space-frequency combining coefficients form a third set of space-frequency combining coefficients. At this time, the K space-frequency combining coefficients reported by the terminal device to the network device are the space-frequency combining coefficients included in the first space-frequency combining coefficient set, the second space-frequency combining coefficient set, and the second space-frequency combining coefficient set.

The number of transmission layers of scene 4 is 4, and the value of N is 4.

In this embodiment, 4 transmission layers may be denoted as transmission layer #1, transmission layer #2, transmission layer #3, and transmission layer #4, where N may be 4, the N spatial vector sets include a first spatial vector set, a second spatial vector set, a third spatial vector set, and a fourth spatial vector set, the N frequency domain vector sets include a first frequency domain vector set, a second frequency domain vector set, a third spatial vector set, and a fourth frequency domain vector set, the N space-frequency merging coefficient sets include a first space-frequency merging coefficient set, a second space-frequency merging coefficient set, a third space-frequency merging coefficient set, and a fourth space-frequency merging coefficient set, where the first indication information generated by the terminal device further includes information corresponding to the third spatial vector set and information corresponding to the fourth spatial vector set, and the number of bits of information corresponding to the third spatial vector set in the first indication information generated by the terminal device is greater than the number of bits of spatial information corresponding to the fourth spatial vector set, and is less than the bit number of the information corresponding to the first space vector set.

The terminal device may determine the first spatial vector set and the second spatial vector set from the spatial vector corresponding to the transmission layer #1 and the spatial vector corresponding to the transmission layer #2, and the terminal device may determine the third spatial vector set and the fourth spatial vector set from the spatial vector corresponding to the transmission layer #3 and the spatial vector corresponding to the transmission layer # 4.

For example, the terminal device may determine a partial vector of the spatial vectors corresponding to the transmission layer #1 and a partial vector of the spatial vectors corresponding to the transmission layer #2 as a first spatial vector set, determine another partial vector of the spatial vectors corresponding to the transmission layer #1 and another partial vector of the spatial vectors corresponding to the transmission layer #2 as a second spatial vector set, determine a partial vector of the spatial vectors corresponding to the transmission layer #3 and a partial vector of the spatial vectors corresponding to the transmission layer #4 as a third spatial vector set, and determine another partial vector of the spatial vectors corresponding to the transmission layer #3 and another partial vector of the spatial vectors corresponding to the transmission layer #4 as a fourth spatial vector set.

The terminal device may divide the space vector corresponding to the transmission layer #1 into two parts according to the strength of the space vector, divide the space vector corresponding to the transmission layer #2 into two parts according to the strength of the space vector, divide the space vector corresponding to the transmission layer #3 into two parts according to the strength of the space vector, divide the space vector corresponding to the transmission layer #4 into two parts according to the strength of the space vector, merge a stronger set of space vectors corresponding to the transmission layer #1 and a stronger set of space vectors corresponding to the transmission layer #2 into a first space vector set, merge a weaker set of space vectors corresponding to the transmission layer #1 and a weaker set of space vectors corresponding to the transmission layer #2 into a second space vector set, determine a stronger set of space vectors corresponding to the transmission layer #3 and a stronger set of space vectors corresponding to the transmission layer #4 as a third space vector set, the weaker set of spatial vectors corresponding to transport layer #3 and the weaker set of spatial vectors corresponding to transport layer #4 are merged into a fourth set of spatial vectors. At this time, the Q space vectors reported to the network device by the aforementioned terminal device are the sum of the numbers of space vectors included in the first space vector set, the second space vector set, the third space vector set, and the fourth space vector set.

For the determined first, second, third and fourth space vector sets, the terminal device may determine P for the first space vector set₁A frequency domain vector, determining P for the second set of space domain vectors₂Determining P for the third set of space vectors₃Determining P for the third set of space vectors₄A frequency domain vector, P₁The frequency domain vectors form the first set of frequency domain vectors, P₂The frequency domain vectors form the second set of frequency domain vectors, P₃The frequency domain vectors form the third set of frequency domain vectors, P₄A number of frequency domain vectors constitute the fourth set of frequency domain vectors. At this time, the P frequency domain vectors reported to the network device by the aforementioned terminal device are the frequency domain vectors included in the first frequency domain vector set, the second frequency domain vector set, the third frequency domain vector set, and the fourth frequency domain vector set.

In order to enable the bit number of the information corresponding to the first space vector set in the first indication information to be larger than the bit number of the information corresponding to the third space vector set, the bit number of the information corresponding to the third space vector set to be larger than the bit number of the information corresponding to the second space vector set, and the bit number of the information corresponding to the second space vector set to be larger than the bit number of the information corresponding to the fourth space vector set The number of the frequency domain vectors determined for the first set of space vectors is greater than the number of the frequency domain vectors determined for the third set of space vectors, the number of the frequency domain vectors determined for the third set of space vectors is greater than the number of the frequency domain vectors determined for the second set of space vectors, the number of the frequency domain vectors determined for the second set of space vectors is greater than the number of the frequency domain vectors determined for the fourth set of space vectors, that is, P, may be determined by the terminal device based on the second indication information sent by the network device or based on a pre-configuration₁Greater than P₃，P₃Greater than P₂，P₂Greater than P₄The number of frequency domain vectors in the first frequency domain vector set indicated in the first indication information is greater than the number of frequency domain vectors in the third frequency domain vector set indicated in the first indication information, the number of frequency domain vectors in the third frequency domain vector set indicated in the first indication information is greater than the number of frequency domain vectors in the second frequency domain vector set indicated in the first indication information, and the number of frequency domain vectors in the second frequency domain vector set indicated in the first indication information is greater than the number of frequency domain vectors in the fourth frequency domain vector set indicated in the first indication information.

For example, the first indication information carries the index number of the frequency domain vector included in the first set of frequency domain vectors, the index number of the frequency domain vector included in the second set of frequency domain vectors, the index number of the frequency domain vector included in the third set of frequency domain vectors, and the index number of the frequency domain vector included in the fourth set of frequency domain vectors, then the number of frequency domain vectors in the first set of frequency domain vectors indicated in the first indication information is greater than the number of frequency domain vectors in the third set of frequency domain vectors indicated in the first indication information, the number of frequency domain vectors in the third set of frequency domain vectors indicated in the first indication information is greater than the number of frequency domain vectors in the second set of frequency domain vectors indicated in the first indication information, the number of frequency domain vectors in the second set of frequency domain vectors indicated in the first indication information being greater than the number of frequency domain vectors in the fourth set of frequency domain vectors indicated in the first indication information means: the number of index numbers of frequency domain vectors included in a first frequency domain vector set carried in the first indication information is greater than the number of index numbers of frequency domain vectors included in a third frequency domain vector set carried in the first indication information, the number of index numbers of frequency domain vectors included in the third frequency domain vector set carried in the first indication information is greater than the number of index numbers of frequency domain vectors included in a second frequency domain vector set carried in the first indication information, the number of index numbers of frequency domain vectors included in the second frequency domain vector set carried in the first indication information is greater than the number of index numbers of frequency domain vectors included in a fourth frequency domain vector set carried in the first indication information, so that the number of bits carrying information corresponding to the first vector space set (e.g., the index numbers of frequency domain vectors corresponding to the first space domain vector set) in the first indication information is greater than the number carrying information corresponding to the third space vector set (e.g., index number of the frequency domain vector corresponding to the third spatial vector set), the number of bits carrying information corresponding to the third spatial vector set (e.g., the index number of the frequency domain vector corresponding to the third spatial vector set) in the first indication information is greater than the number of bits carrying information corresponding to the second spatial vector set (e.g., the index number of the frequency domain vector corresponding to the second spatial vector set), and the number of bits carrying information corresponding to the second spatial vector set (e.g., the index number of the frequency domain vector corresponding to the second spatial vector set) in the first indication information is greater than the number of bits carrying information corresponding to the fourth spatial vector set (e.g., the index number of the frequency domain vector corresponding to the fourth spatial vector set).

In addition, for the determined first, second and third sets of spatial vectors, the terminal device may determine K for the first set of spatial vectors₁Determining K for the second space vector set based on the space-frequency merging coefficients₂Determining K for the third space vector set based on the space-frequency merging coefficients₃Determining K for the fourth space vector set based on the space-frequency merging coefficients₄Space-frequency combining coefficient, K₁The space-frequency combining coefficients form a first set of space-frequency combining coefficients, K₂The space-frequency combining coefficients form a second set of space-frequency combining coefficients, K₃The space-frequency combining coefficients form a third set of space-frequency combining coefficients, K₄The space-frequency combining coefficients form a fourth set of space-frequency combining coefficients. At this time, the aforementioned terminal device goes to the networkThe K space-frequency combining coefficients reported by the network device are the space-frequency combining coefficients included in the first space-frequency combining coefficient set, the second space-frequency combining coefficient set, the third space-frequency combining coefficient set and the fourth space-frequency combining coefficient set.

In order to enable the number of bits carrying information corresponding to the first space vector set to be greater than the number of bits carrying information corresponding to the third space vector set, the number of bits carrying information corresponding to the third space vector set to be greater than the number of bits carrying information corresponding to the second space vector set, and the number of bits carrying information corresponding to the second space vector set to be greater than the number of bits carrying information corresponding to the fourth space vector set, the terminal device may determine, based on second indication information sent by the network device or based on pre-configuration, that the number of space-frequency combining coefficients determined for the first space-frequency combining coefficient set is greater than the number of space-frequency combining coefficients determined for the third space-frequency combining coefficient set, the number of space-frequency combining coefficients determined for the third space-frequency combining coefficient set is greater than the number of space-frequency combining coefficients determined for the second space-frequency combining coefficient set, and the number of space-frequency combining coefficients determined for the second space-frequency combining coefficient set is greater than the number of space-frequency combining coefficients determined for the fourth space-frequency combining coefficient set And determining the number of space-frequency merging coefficients. Namely K ₁Greater than K₃，K₃Greater than K₂，K₂Greater than K₄The number of space-frequency combining coefficients in the first space-frequency combining coefficient set indicated in the first indication information is greater than the number of space-frequency combining coefficients in the third space-frequency combining coefficient set indicated in the first indication information, the number of space-frequency combining coefficients in the third space-frequency combining coefficient set indicated in the first indication information is greater than the number of space-frequency combining coefficients in the second space-frequency combining coefficient set indicated in the first indication information, and the number of space-frequency combining coefficients in the second space-frequency combining coefficient set indicated in the first indication information is greater than the number of space-frequency combining coefficients in the fourth space-frequency combining coefficient set indicated in the first indication information.

For example, the first indication information carries quantization information of the space-frequency combining coefficients included in the first space-frequency combining coefficient, quantization information of the space-frequency combining coefficients included in the second space-frequency combining coefficient set, quantization information of the space-frequency combining coefficients included in the third space-frequency combining coefficient set, and quantization information of the space-frequency combining coefficients included in the fourth space-frequency combining coefficient set, so that the number of the space-frequency combining coefficients in the first space-frequency combining coefficient set indicated in the first indication information is greater than the number of the space-frequency combining coefficients in the third space-frequency combining coefficient set indicated in the first indication information, the number of the space-frequency combining coefficients in the third space-frequency combining coefficient set indicated in the first indication information is greater than the number of the space-frequency combining coefficients in the second space-frequency combining coefficient set indicated in the first indication information, and the number of the space-frequency combining coefficients in the second space-frequency combining coefficient set indicated in the first indication information is greater than the number of the space-frequency combining coefficients indicated in the first indication information The number of space-frequency combining coefficients in the fourth set of space-frequency combining coefficients means: the number of pieces of quantization information of the space-frequency combining coefficients included in the first space-frequency combining coefficient set carried in the first indication information is greater than the number of pieces of quantization information of the space-frequency combining coefficients included in the third space-frequency combining coefficient set carried in the first indication information, the number of pieces of quantization information of the space-frequency combining coefficients included in the third space-frequency combining coefficient set carried in the first indication information is greater than the number of pieces of quantization information of the space-frequency combining coefficients included in the second space-frequency combining coefficient set carried in the first indication information, the number of pieces of quantization information of the space-frequency combining coefficients included in the second space-frequency combining coefficient set carried in the first indication information is greater than the number of pieces of quantization information of the space-frequency combining coefficients included in the fourth space-frequency combining coefficient set carried in the first indication information, so that the first indication information carries information corresponding to the first space-frequency vector set (for example, the quantization information of the space-frequency combining coefficient corresponding to the first space vector set) is greater than the number of bits for carrying information corresponding to the third space vector set (for example, the quantization information of the space-frequency combining coefficient corresponding to the third space vector set), the number of bits for carrying information corresponding to the third space vector set (for example, the quantization information of the space-frequency combining coefficient corresponding to the third space vector set) in the first indication information is greater than the number of bits for carrying information corresponding to the second space vector set (for example, the quantization information of the space-frequency combining coefficient corresponding to the second space vector set), and the number of bits for carrying information corresponding to the second space vector set (for example, the quantization information of the space-frequency combining coefficient corresponding to the second space vector set) in the first indication information is greater than the number of bits for carrying information corresponding to the fourth space vector set (for example, the quantization information of the space-frequency combining coefficient corresponding to the fourth space vector set).

In addition, for the determined first, second, and third and fourth sets of space-frequency combining coefficients, the terminal device may determine, based on second indication information sent by the network device or based on a pre-configuration, that the number of quantization bits determined for each space-frequency combining coefficient in the first set of space-frequency combining coefficients is greater than the number of quantization bits determined for each space-frequency combining coefficient in the third set of space-frequency combining coefficients, that the number of quantization bits determined for each space-frequency combining coefficient in the third set of space-frequency combining coefficients is greater than the number of quantization bits determined for each space-frequency combining coefficient in the second set of space-frequency combining coefficients, that the number of quantization bits determined for each space-frequency combining coefficient in the second set of space-frequency combining coefficients is greater than the number of quantization bits determined for each space-frequency combining coefficient in the fourth set of space-frequency combining coefficients, so that the number of bits of the first indication information carrying information corresponding to the first space vector set (e.g., quantized information of the space-frequency combining coefficient corresponding to the first space vector set) is greater than the number of bits of the third space vector set (e.g., quantized information of the space-frequency combining coefficient corresponding to the third space vector set), the number of bits of the first indication information carrying information corresponding to the third space vector set (e.g., quantized information of the space-frequency combining coefficient corresponding to the third space vector set) is greater than the number of bits of the second space vector set (e.g., quantized information of the space-frequency combining coefficient corresponding to the second space vector set), the number of bits of the first indication information carrying information corresponding to the second space vector set (e.g., quantized information of the space-frequency combining coefficient corresponding to the second space vector set) is greater than the number of bits of the first indication information carrying information corresponding to the fourth space vector set (e.g., quantization information of the space-frequency combination coefficient corresponding to the fourth set of space-domain vectors).

It should be further noted that, in the scenes 1 to 4, when the space domain vector corresponding to one transmission layer is divided into at least two parts of space domain vectors according to the strength of the space domain vector, the number of the space domain vectors included in any two parts of space domain vectors may not be equal, that is, when the space domain vector corresponding to one transmission layer is divided into at least two parts of space domain vectors according to the strength of the space domain vector, all the space domain vectors corresponding to the transmission layer may not be equally divided

It should be further noted that, the method for indicating a precoding vector provided in the embodiment of the present application is described above by taking only the maximum number of transmission layers as 4 as an example, but this does not limit the embodiment of the present application at all, and the method for indicating a precoding vector provided in the embodiment of the present application may also be applied to a scenario in which the number of transmission layers is greater than 4.

It should be further noted that the number of the transmission layers listed above and the number of the N sets of spatial vectors determined from the spatial vectors corresponding to the multiple transmission layers are only exemplary, and do not limit the embodiments of the present application in any way.

In this embodiment, the spatial vector set corresponding to the transmission layer may be further divided into two parts by taking the polarization direction as the granularity, for example, for one transmission layer, the spatial vector corresponding to one polarization direction of the transmission layer may be determined as the spatial vector in a certain spatial vector set, and the spatial vector corresponding to the other polarization direction of the transmission layer may be determined as the spatial vector in another spatial vector set.

For example, for each transmission layer, each polarization direction of the transmission layer corresponds to one merging coefficient quantized reference amplitude value, when the merging coefficient quantized reference amplitude value corresponding to one polarization direction is larger, the spatial vector corresponding to the polarization direction is stronger, and when the merging coefficient quantized reference amplitude value corresponding to one polarization direction is smaller, the spatial vector corresponding to the polarization direction is weaker. The combining coefficient quantization reference amplitude value corresponding to each polarization direction may be the maximum amplitude value of the space-frequency combining coefficient corresponding to the polarization direction, and the combining coefficient quantization reference amplitude value corresponding to the stronger space-domain vector is greater than or equal to the combining coefficient quantization reference amplitude value corresponding to the weaker space-domain vector. The merging coefficient quantization reference amplitude value corresponding to the stronger spatial vector may be normalized to 1.

The terminal device may also sort the space domain vectors corresponding to each transmission layer in each polarization direction according to a magnitude relationship between the maximum amplitude values or the sum of squares of the amplitude values of the space-frequency combining coefficients corresponding to the space domain vectors, when the maximum amplitude values or the sum of squares of the amplitude values of the space-frequency combining coefficients corresponding to the space domain vectors corresponding to one polarization direction are larger, the space domain vector corresponding to the polarization direction is stronger, and when the maximum amplitude values or the sum of squares of the amplitude values of the space-frequency combining coefficients corresponding to the space domain vector corresponding to one polarization direction is smaller, the space domain vector corresponding to the polarization direction is weaker.

In the specific division, a stronger set of spatial vectors (i.e., spatial vectors corresponding to one polarization direction) may be determined as spatial vectors in one spatial vector set, and a weaker set of spatial vectors (i.e., spatial vectors corresponding to another polarization direction) may be determined as spatial vectors in another spatial vector set.

The following describes the above technical solution in detail for different scenarios.

The number of transmission layers in scene 5 is 3, and the value of N is 4.

In this embodiment, 3 transmission layers may be denoted as transmission layer #1, transmission layer #2, and transmission layer #3, where N may be 4, the N space vector sets include a first space vector set, a second space vector set, a third space vector set, and a fourth space vector set, the N frequency domain vector sets include a first frequency domain vector set, a second frequency domain vector set, a third frequency domain vector set, and a fourth vector frequency domain set, the N space-frequency merging coefficient sets include a first space-frequency merging coefficient set, a second space-frequency merging coefficient set, a third space-frequency merging coefficient set, and a fourth space-frequency merging coefficient set, where the first indication information generated by the terminal device further includes information corresponding to the third space vector set and information corresponding to the fourth space vector set, and the number of bits of the space vector information corresponding to the third space vector set in the first indication information generated by the terminal device is greater than the number of bits of the space vector information corresponding to the fourth space vector set, and is less than the bit number of the information corresponding to the first space vector set.

Further, the bit number of the first indication information generated by the terminal device, which carries information corresponding to the second space vector set, is greater than or equal to the bit number of the first indication information, which carries information corresponding to the fourth space vector set, and is less than the bit number of the first indication information, which carries information corresponding to the third space vector set.

If two polarization directions exist in each transmission layer, the terminal device may determine a first space vector set and a second space vector set from the space vector corresponding to the transmission layer #1, and the terminal device may determine a third space vector set from the space vector corresponding to the transmission layer #2 and the space vector corresponding to the transmission layer # 3. For example, the terminal device may set L corresponding to the first polarization direction for the transmission layer #1₁Determining the space vectors as a first space vector set, and corresponding to the transmission layer #1 in the second polarization direction₁Determining space vectors as a second space vector set, and determining L corresponding to the transmission layer #2 in the first polarization direction₂L corresponding to space vector and transmission layer #3 in first polarization direction₃Determining spatial vectors as a third set of spatial vectors, and corresponding to L of the transmission layer #2 in the second polarization direction₂L corresponding to space vector and transmission layer #3 in the second polarization direction₃The spatial vectors are determined as a fourth set of spatial vectors.

The terminal device may divide the space vector of the transmission layer #1 corresponding to two polarization directions (e.g., the first polarization direction and the second polarization direction) into two parts with the polarization directions as granularity, where each part includes L corresponding to one polarization direction₁A space vector for dividing the space vector corresponding to the transmission layer #2 in two polarization directions into two parts with the polarization direction as granularity, each part including a poleChange L corresponding to direction₂A space vector dividing the space vector corresponding to the transmission layer #3 in two polarization directions into two parts by taking the polarization direction as granularity, wherein each part comprises L corresponding to one polarization direction₃A spatial vector.

A stronger set of spatial vectors corresponding to a certain polarization direction (e.g., a first polarization direction) of the transmission layer #1 is determined as a first set of spatial vectors, a weaker set of spatial vectors corresponding to another polarization direction (e.g., a second polarization direction) of the transmission layer #1 is determined as a second set of spatial vectors, a stronger set of spatial vectors corresponding to a certain polarization direction (e.g., a first polarization direction) of the transmission layer #2 and a stronger set of spatial vectors corresponding to a certain polarization direction (e.g., a first polarization direction) of the transmission layer #3 are merged into a third set of spatial vectors, a weaker set of spatial vectors corresponding to the other polarization direction (e.g., the second polarization direction) of the transmission layer #2 and a weaker set of spatial vectors corresponding to the other polarization direction (e.g., the second polarization direction) of the transmission layer #3 are merged into a fourth set of spatial vectors. At this time, the Q space vectors reported to the network device by the aforementioned terminal device are the sum of the numbers of space vectors included in the first space vector set, the second space vector set, and the third space vector set.

In order to make the number of bits carrying information corresponding to the first set of spatial vectors in the first indication information larger than the number of bits carrying information corresponding to the third set of spatial vectors, and the bit number of the information corresponding to the third space domain vector set is larger than the bit number of the information corresponding to the second space domain vector set, and the number of bits carrying information corresponding to the second set of space vectors is greater than the number of bits carrying information corresponding to the fourth set of space vectors, and the terminal device may determine, based on the second indication information sent by the network device or based on the pre-configuration, that the number of frequency domain vectors determined for the first set of space vectors is greater than the number of frequency domain vectors determined for the third set of space vectors, that the number of frequency domain vectors determined for the third set of space vectors is greater than the number of frequency domain vectors determined for the second set of space vectors, and that the number of frequency domain vectors determined for the second set of space vectors is greater than the number of frequency domain vectors determined for the fourth set of space vectors.Number, i.e. P₁Greater than P₃，P₃Greater than P₂，P₂Greater than P₄The number of frequency domain vectors in the first frequency domain vector set indicated in the first indication information is greater than the number of frequency domain vectors in the third frequency domain vector set indicated in the first indication information, the number of frequency domain vectors in the third frequency domain vector set indicated in the first indication information is greater than the number of frequency domain vectors in the second frequency domain vector set indicated in the first indication information, and the number of frequency domain vectors in the second frequency domain vector set indicated in the first indication information is greater than the number of frequency domain vectors in the fourth frequency domain vector set indicated in the first indication information.

For the first set of spatial vectors, the same number of frequency domain vectors (S) may be determined for each spatial vector corresponding to each transmission layer in the first set of spatial vectors₁A frequency domain vector); for the second set of spatial vectors, the same number of frequency domain vectors (S) may be determined for each spatial vector corresponding to each transmission layer in the second set of spatial vectors₂A frequency domain vector); for the third set of spatial vectors, the same number of frequency domain vectors (S) may be determined for each spatial vector corresponding to each transmission layer in the third set of spatial vectors₃A frequency domain vector); for the fourth set of spatial vectors, the same number of frequency domain vectors (S) may be determined for each spatial vector corresponding to each transmission layer in the fourth set of spatial vectors₄A frequency domain vector). The terminal device may be based on the second indication information sent by the network device or based on pre-configuration, the number of frequency domain vectors determined for the first set of space vectors is greater than the number of frequency domain vectors determined for the third set of space vectors, the number of frequency domain vectors determined for the third set of space vectors is greater than the number of frequency domain vectors determined for the second set of space vectors, the number of frequency domain vectors determined for the second set of space vectors is greater than the number of frequency domain vectors determined for the fourth set of space vectors, that is, S ₁Greater than S₃，S₃Greater than S₂，S₂Greater than S₄。

Further, in order to make the number of bits carrying information corresponding to the first set of spatial vectors larger than the number of bits carrying information corresponding to the third set of spatial vectors, the number of bits carrying information corresponding to the third set of spatial vectors larger than the number of bits carrying information corresponding to the second set of spatial vectors, and the number of bits carrying information corresponding to the second set of spatial vectors larger than the number of bits carrying information corresponding to the fourth set of spatial vectors in the first indication information, the terminal device may determine, based on the second indication information transmitted by the network device or based on a pre-configuration, that the number of frequency domain vectors determined for each spatial vector in the first set of spatial vectors is larger than the number of frequency domain vectors determined for each spatial vector in the third set of spatial vectors, the number of frequency domain vectors determined for each spatial vector in the third set of spatial vectors is larger than the number of frequency domain vectors determined for each spatial vector in the second set of spatial vectors, the number of frequency domain vectors determined for each space vector in the second set of space vectors is greater than the number of frequency domain vectors determined for each space vector in the fourth set of space vectors.

In addition, for the determined first, second and third sets of spatial vectors, the terminal device may determine K for the first set of spatial vectors ₁Determining K for the second space vector set based on the space-frequency merging coefficients₂Determining K for the third space vector set based on the space-frequency merging coefficients₃Determining K for the fourth space vector set based on the space-frequency merging coefficients₄Space-frequency combining coefficient, K₁The space-frequency combining coefficients form a first set of space-frequency combining coefficients, K₂The space-frequency combining coefficients form a second set of space-frequency combining coefficients, K₃The space-frequency combining coefficients form a third set of space-frequency combining coefficients, K₄The space-frequency combining coefficients form a fourth set of space-frequency combining coefficients. At this time, the K space-frequency combining coefficients reported by the terminal device to the network device are the space-frequency combining coefficients included in the first space-frequency combining coefficient set, the second space-frequency combining coefficient set, the third space-frequency combining coefficient set, and the fourth space-frequency combining coefficient setAnd (4) counting.

In addition, for the determined first, second, and third and fourth sets of space-frequency combining coefficients, the terminal device may determine, based on second indication information sent by the network device or based on a pre-configuration, that the number of quantization bits determined for each space-frequency combining coefficient in the first set of space-frequency combining coefficients is greater than the number of quantization bits determined for each space-frequency combining coefficient in the third set of space-frequency combining coefficients, that the number of quantization bits determined for each space-frequency combining coefficient in the third set of space-frequency combining coefficients is greater than the number of quantization bits determined for each space-frequency combining coefficient in the second set of space-frequency combining coefficients, that the number of quantization bits determined for each space-frequency combining coefficient in the second set of space-frequency combining coefficients is greater than the number of quantization bits determined for each space-frequency combining coefficient in the fourth set of space-frequency combining coefficients, so that the number of bits of the first indication information carrying information corresponding to the first space vector set (e.g., quantized information of the space-frequency combining coefficient corresponding to the first space vector set) is greater than the number of bits of the third space vector set (e.g., quantized information of the space-frequency combining coefficient corresponding to the third space vector set), the number of bits of the first indication information carrying information corresponding to the third space vector set (e.g., quantized information of the space-frequency combining coefficient corresponding to the third space vector set) is greater than the number of bits of the second space vector set (e.g., quantized information of the space-frequency combining coefficient corresponding to the second space vector set), the number of bits of the first indication information carrying information corresponding to the second space vector set (e.g., quantized information of the space-frequency combining coefficient corresponding to the second space vector set) is greater than the number of bits of the first indication information carrying information corresponding to the fourth space vector set (e.g., quantization information of the space-frequency combination coefficient corresponding to the fourth set of space-domain vectors). The quantization bit number corresponding to the space-frequency merging coefficient comprises an amplitude quantization bit and a phase quantization bit. Wherein the amplitude quantization bit may be a bit (may be 3 bits) indicating a differential amplitude value of the space-frequency combination coefficient with respect to the quantization reference amplitude corresponding to the polarization direction in which the space-frequency combination coefficient is located. Wherein the phase quantization bit may be a bit (which may be 3 bits or 4 bits) for indicating a phase value of the space-frequency combining coefficient.

The number of transmission layers in scene 6 is 4, and the value of N is 4.

If there are two polarization directions in each transmission layer, the terminal device may determine a first space vector set and a second space vector set from the space vector corresponding to the transmission layer #1 and the space vector corresponding to the transmission layer #2, and the terminal device may transmit the first space vector set and the second space vector setAnd determining a third space vector set and a fourth space vector set from the space vector corresponding to the layer #3 and the space vector corresponding to the transmission layer # 4. For example, the terminal device may set L corresponding to the first polarization direction for the transmission layer #1₁L corresponding to space vector and transmission layer #2 in the first polarization direction₂Determining the space vectors as a first space vector set, and corresponding to the transmission layer #1 in the second polarization direction₁L corresponding to the space vector and the transmission layer #2 in the second polarization direction₂Determining space vectors as a second space vector set, and determining L corresponding to the transmission layer #3 in the first polarization direction₃L corresponding to space vector and transmission layer #4 in the first polarization direction ₄Determining spatial vectors as a third set of spatial vectors, and corresponding to L of the transmission layer #3 in the second polarization direction₃L corresponding to the space vector and the transmission layer #4 in the second polarization direction₄The spatial vectors are determined as a fourth set of spatial vectors.

The terminal device may divide the space vector of the transmission layer #1 corresponding to two polarization directions (e.g., the first polarization direction and the second polarization direction) into two parts with the polarization directions as granularity, where each part includes L corresponding to one polarization direction₁A space vector dividing the space vector corresponding to the transmission layer #2 in two polarization directions into two parts by taking the polarization direction as granularity, wherein each part comprises L corresponding to one polarization direction₂A space vector dividing the space vector corresponding to the transmission layer #3 in two polarization directions into two parts by taking the polarization direction as granularity, wherein each part comprises L corresponding to one polarization direction₃A space vector dividing the space vector corresponding to the transmission layer #4 in two polarization directions into two parts by taking the polarization direction as granularity, wherein each part comprises L corresponding to one polarization direction₄A spatial vector.

A stronger set of spatial vectors corresponding to a certain polarization direction (e.g., a first polarization direction) of the transmission layer #1 and a stronger set of spatial vectors corresponding to a certain polarization direction (e.g., a first polarization direction) of the transmission layer #2 are merged into a first set of spatial vectors, a weaker set of spatial vectors corresponding to a certain polarization direction (e.g., a second polarization direction) of the transmission layer #1 and a weaker set of spatial vectors corresponding to a certain polarization direction (e.g., a second polarization direction) of the transmission layer #2 are merged into a second set of spatial vectors, a stronger set of spatial vectors corresponding to a certain polarization direction (e.g., a first polarization direction) of the transmission layer #3 and a stronger set of spatial vectors corresponding to a certain polarization direction (e.g., a first polarization direction) of the transmission layer #4 are merged into a third set of spatial vectors, a certain polarization direction (e.g., second polarization direction) is combined with a weaker set of spatial vectors corresponding to a certain polarization direction (e.g., the second polarization direction) of the transmission layer #4 into a fourth set of spatial vectors. At this time, the Q space vectors reported to the network device by the aforementioned terminal device are the sum of the numbers of space vectors included in the first space vector set, the second space vector set, and the third space vector set.

In order to make the number of bits carrying information corresponding to the first set of space vectors in the first indication information larger than the number of bits carrying information corresponding to the third set of space vectors, the number of bits carrying information corresponding to the third set of space vectors larger than the number of bits carrying information corresponding to the second set of space vectors, and the number of bits carrying information corresponding to the second set of space vectors larger than the number of bits carrying information corresponding to the fourth set of space vectors, the terminal device may determine, based on the second indication information sent by the network device or based on a pre-configuration, that the number of frequency domain vectors determined for the first set of space vectors is larger than the number of frequency domain vectors determined for the third set of space vectors, that the number of frequency domain vectors determined for the third set of space vectors is larger than the number of frequency domain vectors determined for the second set of space vectors, that the number of frequency domain vectors determined for the second set of space vectors is larger than the number of frequency domain vectors determined for the fourth set of space vectors, i.e. P₁Greater than P₃，P₃Greater than P₂，P₂Greater than P₄The number of frequency domain vectors in the first frequency domain vector set indicated in the first indication information is greater than the number of frequency domain vectors in the third frequency domain vector set indicated in the first indication information, and the number of frequency domain vectors in the third frequency domain vector set indicated in the first indication information is greater than the number of frequency domain vectors in the first indication information The indicated number of frequency domain vectors in the second set of frequency domain vectors, the indicated number of frequency domain vectors in the second set of frequency domain vectors in the first indication information is greater than the indicated number of frequency domain vectors in the fourth set of frequency domain vectors in the first indication information. For the first set of spatial vectors, the same number of frequency domain vectors (S) may be determined for each spatial vector corresponding to each transmission layer in the first set of spatial vectors₁A frequency domain vector); for the second set of spatial vectors, the same number of frequency domain vectors (S) may be determined for each spatial vector corresponding to each transmission layer in the second set of spatial vectors₂A frequency domain vector); for the third set of spatial vectors, the same number of frequency domain vectors (S) may be determined for each spatial vector corresponding to each transmission layer in the third set of spatial vectors₃A frequency domain vector); for the fourth set of spatial vectors, the same number of frequency domain vectors (S) may be determined for each spatial vector corresponding to each transmission layer in the fourth set of spatial vectors₄A frequency domain vector). The terminal device may be based on the second indication information sent by the network device or based on pre-configuration, the number of frequency domain vectors determined for the first set of space vectors is greater than the number of frequency domain vectors determined for the third set of space vectors, the number of frequency domain vectors determined for the third set of space vectors is greater than the number of frequency domain vectors determined for the second set of space vectors, the number of frequency domain vectors determined for the second set of space vectors is greater than the number of frequency domain vectors determined for the fourth set of space vectors, that is, S ₁Greater than S₃，S₃Greater than S₂，S₂Greater than S₄，

In addition, for the determined first, second and third sets of spatial vectors, the terminal device may determine K for the first set of spatial vectors ₁Determining K for the second space vector set based on the space-frequency merging coefficients₂Determining K for the third space vector set based on the space-frequency merging coefficients₃Determining K for the fourth space vector set based on the space-frequency merging coefficients₄Space-frequency combining coefficient, K₁The space-frequency combining coefficients form a first set of space-frequency combining coefficients, K₂The space-frequency combining coefficients form a second set of space-frequency combining coefficients, K₃The space-frequency combining coefficients form a third set of space-frequency combining coefficients, K₄The space-frequency combining coefficients form a fourth set of space-frequency combining coefficients. At this time, the K space-frequency combining coefficients reported by the terminal device to the network device are space-frequency combining coefficients included in the first space-frequency combining coefficient set, the second space-frequency combining coefficient set, the third space-frequency combining coefficient set, and the fourth space-frequency combining coefficient set.

In order to make the number of bits carrying information corresponding to the first space vector set larger than the number of bits carrying information corresponding to the third space vector set, the number of bits carrying information corresponding to the third space vector set larger than the number of bits carrying information corresponding to the second space vector set, and the number of bits carrying information corresponding to the second space vector set larger than the number of bits carrying information corresponding to the fourth space vector set in the first indication information, The terminal device may determine, based on the second indication information sent by the network device or based on a pre-configuration, that the number of space-frequency combining coefficients determined for the first space-frequency combining coefficient set is greater than the number of space-frequency combining coefficients determined for the third space-frequency combining coefficient set, the number of space-frequency combining coefficients determined for the third space-frequency combining coefficient set is greater than the number of space-frequency combining coefficients determined for the second space-frequency combining coefficient set, and the number of space-frequency combining coefficients determined for the second space-frequency combining coefficient set is greater than the number of space-frequency combining coefficients determined for the fourth space-frequency combining coefficient set. Namely K₁Greater than K₃，K₃Greater than K₂，K₂Greater than K₄The number of space-frequency combining coefficients in the first space-frequency combining coefficient set indicated in the first indication information is greater than the number of space-frequency combining coefficients in the third space-frequency combining coefficient set indicated in the first indication information, the number of space-frequency combining coefficients in the third space-frequency combining coefficient set indicated in the first indication information is greater than the number of space-frequency combining coefficients in the second space-frequency combining coefficient set indicated in the first indication information, and the number of space-frequency combining coefficients in the second space-frequency combining coefficient set indicated in the first indication information is greater than the number of space-frequency combining coefficients in the fourth space-frequency combining coefficient set indicated in the first indication information.

For scenarios 5 and 6, the number of spatial vectors and the number of frequency domain vectors configured for different transmission layers and different polarization directions are listed in table 1.

TABLE 1

Wherein L represents the number of space vectors corresponding to each polarization direction in each transmission layer, and the value of L may be configured by the network device. M₀Indicating the number of frequency domain vectors corresponding to each space domain vector for each transmission layer in rank 1 and rank 2. M₀The value of (a) may be network device configured. Furthermore, M₀The value of (a) can be determined based on a network device configuration parameter p and a preset rule, wherein

p can be 1/2 or 1/4, N₃Represents the number of frequency domain units, and N₃＝R N_SB。N_SBRepresenting the number of frequency domain subbands, R may take on a value of 1 or 2. M_r,l,pWhen rank is r, the index is the transmission layer of l, and the index is the number of frequency domain vectors configured by the network equipment in the polarization direction of p or reported by the terminal equipment. With N _SBWhen the base station configures rank 1 or rank 2, p 1/2 is taken as an example, and for rank 1 or rank 2, the number of frequency domain vectors corresponding to each space domain vector of each transmission layer is M₀7. For rank3, M_3,0,0＝7,M_3,0,1＝4,M_3,1,0＝M_3,2,0＝6,M_3,1,1＝M_3,2,13. That is, for transmission layer 1, each space domain vector corresponding to the first polarization direction corresponds to 7 frequency domain vectors, and for transmission layer 1, the second polarization direction corresponds toEach space domain vector of (1) corresponds to 4 frequency domain vectors, for transmission layer 2, each space domain vector corresponding to the first polarization direction corresponds to 6 frequency domain vectors, for transmission layer 2, each space domain vector corresponding to the second polarization direction corresponds to 3 frequency domain vectors, for transmission layer 3, each space domain vector corresponding to the first polarization direction corresponds to 6 frequency domain vectors, and for transmission layer 3, each space domain vector corresponding to the second polarization direction corresponds to 3 frequency domain vectors. And for each transmission layer, the merging coefficient quantization reference amplitude value corresponding to the first polarization direction is greater than or equal to the merging coefficient quantization reference amplitude value corresponding to the first polarization direction. For rank 4: m_4,0,0＝M_4,1,0＝6,M_4,0,1＝M_4,1,1＝3,M_4,2,0＝M_4,3,0＝4,M_4,2,1＝M_4,3,12. That is, for transmission layer 1, each space domain vector corresponding to the first polarization direction corresponds to 6 frequency domain vectors, for transmission layer 1, each space domain vector corresponding to the second polarization direction corresponds to 3 frequency domain vectors, for the transmission layer 2, each space domain vector corresponding to the first polarization direction corresponds to 6 frequency domain vectors, for transmission layer 2, each space domain vector corresponding to the second polarization direction corresponds to 3 frequency domain vectors, for the transmission layer 3, each space domain vector corresponding to the first polarization direction corresponds to 4 frequency domain vectors, for the transmission layer 3, each space domain vector corresponding to the second polarization direction corresponds to 2 frequency domain vectors, for the transmission layer 4, each space domain vector corresponding to the first polarization direction corresponds to 4 frequency domain vectors, for the transmission layer 4, each space domain vector corresponding to the second polarization direction corresponds to 2 frequency domain vectors. And for each transmission layer, the merging coefficient quantization reference amplitude value corresponding to the first polarization direction is greater than or equal to the merging coefficient quantization reference amplitude value corresponding to the first polarization direction. M _p,r,lThe value of can also be based on the network device configuration parameter v_r,l,pDetermined by a preset rule, wherein

In the above, the method for indicating a precoding vector and determining a precoding vector provided in the embodiment of the present application is described in detail with reference to fig. 1 to fig. 2. Hereinafter, a communication device according to an embodiment of the present application will be described in detail with reference to fig. 3 to 6.

Fig. 3 shows a schematic block diagram of an apparatus 300 for indicating a precoding vector according to an embodiment of the present application. The apparatus 300 is configured to perform the method performed by the terminal device in the foregoing method embodiment. Alternatively, the specific form of the apparatus 300 may be a chip in a terminal device. The embodiments of the present application do not limit this. The apparatus 300 comprises:

a processing module 301, configured to generate first indication information, where the first indication information indicates the P frequency-domain vectors and the K space-frequency combining coefficients, the P frequency domain vectors belong to N sets of frequency domain vectors, the K space-frequency combining coefficients belong to N sets of space-frequency combining coefficients, the N frequency domain vector sets correspond to the N space domain vector sets one by one, the N space-frequency combining coefficient sets correspond to the N space domain vector sets one by one, the N sets of spatial vectors include at least a first set of spatial vectors and a second set of spatial vectors, and at least one set of spatial vectors of the N sets of spatial vectors corresponds to at least two transmission layers, N, P, K is greater than or equal to 2, the first indication information comprises information corresponding to the first space vector set and information corresponding to the second space vector set, the bit number of the first indication information carrying the information corresponding to the first space vector set is larger than the bit number of the information carrying the second space vector set.

The transceiver module 302 is configured to transmit the first indication information.

Optionally, the N sets of frequency domain vectors include a first set of frequency domain vectors and a second set of frequency domain vectors, and the P frequency domain vectors include P in the first set of frequency domain vectors₁A frequency domain vector and P in the second set of frequency domain vectors₂A plurality of frequency domain vectors, the first set of frequency domain vectors corresponding to the first set of spatial vectors, the second set of frequency domain vectors corresponding to the second set of spatial vectors, P₁Greater than P₂And P is₂Greater than or equal to 1.

Optionally, the N sets of space-frequency combining coefficients include a first set of space-frequency combining coefficients and a second set of space-frequency combining coefficients, the first set of space-frequency combining coefficients corresponds to the first set of space-frequency vectors, the second set of space-frequency combining coefficients corresponds to the second set of space-frequency vectors, and a number of quantization bits of each space-frequency combining coefficient in the first set of space-frequency combining coefficients is greater than a number of quantization bits of each space-frequency combining coefficient in the second set of space-frequency combining coefficients.

Optionally, the quantization bit of each space-frequency combination coefficient in the first set of space-frequency combination coefficients comprises at least one of an amplitude quantization bit and a phase quantization bit; the quantization bits of each space-frequency combination coefficient in the second set of space-frequency combination coefficients comprise at least one of amplitude quantization bits and phase quantization bits.

Optionally, the first indication information is further used to indicate Q spatial vectors, Q is greater than or equal to 2, and the Q spatial vectors include Q in the first spatial vector set₁A spatial vector and Q in the second set of spatial vectors₂A plurality of spatial vectors, wherein each spatial vector in the first set of spatial vectors corresponds to S frequency domain vectors, P₁Equal to S or P₁Is equal to S and Q₁S is greater than or equal to 1, each spatial vector in the second set of spatial vectors corresponds to R frequency domain vectors, P₂Equal to R or P₂Is equal to R and Q₂R is greater than or equal to 1.

Optionally, the transceiver module 302 is further configured to receive second indication information, where the second indication information indicates at least one of the following: the number Q of space vectors in the first set of space vectors₁The number Q of the space vectors in the second space vector set₂The number P of the frequency domain vectors in the first frequency domain vector set₁The number P of the frequency domain vectors in the second frequency domain vector set₂The number of space-frequency combining coefficients in the first space-frequency combining coefficient set and the number of space-frequency combining coefficients in the second space-frequency combining coefficient set.

Optionally, the number of space-frequency combining coefficients in the first set of space-frequency combining coefficients is greater than the number of space-frequency combining coefficients in the second set of space-frequency combining coefficients.

Optionally, Q in the first set of spatial vectors₁The spatial vectors include a portion of the vector corresponding to the first transmission layer and a portion of the vector corresponding to the second transmission layer, Q in the second set of spatial vectors₂The spatial vectors include a partial vector corresponding to the first transmission layer and a partial vector corresponding to the second transmission layer.

Optionally, a value of N is 3, the N space vector sets further include a third space vector set, the space vectors in the third space vector set include all vectors corresponding to a third transmission layer, the first indication information further includes information corresponding to the third space vector set, and a bit number of information carrying the information corresponding to the third space vector set in the first indication information is smaller than a bit number of information carrying the information corresponding to the first space vector set.

Optionally, a value of N is 3, the N space vector sets further include a third space vector set, the space vectors in the third space vector set include all vectors corresponding to the third transmission layer and all vectors corresponding to the fourth transmission layer, the first indication information further includes information corresponding to the third space vector set, and a number of bits carrying the information corresponding to the third space vector set in the first indication information is smaller than a number of bits carrying the information corresponding to the first space vector set.

Optionally, the value of N is 4, the N spatial vector sets further include a third spatial vector set and a fourth spatial vector set, the spatial vectors in the third spatial vector set include a partial vector corresponding to the third transmission layer and a partial vector corresponding to the fourth transmission layer, the spatial vectors in the fourth spatial vector set include a partial vector corresponding to the third transmission layer and a partial vector corresponding to the fourth transmission layer, the first indication information further includes information corresponding to the third spatial vector set and information corresponding to the fourth spatial vector set, and a number of bits of information corresponding to the third spatial vector set in the first indication information is greater than a number of bits of information corresponding to the fourth spatial vector set and smaller than a number of bits of information corresponding to the first spatial vector set.

Optionally, a sum of the number of the spatial vectors in the N spatial vector sets is equal to a sum of the number of the spatial vectors corresponding to all the transmission layers.

Optionally, the value of N is 3, the N sets of spatial vectors further include a third set of spatial vectors, the spatial vectors in the first set of spatial vectors include a partial vector corresponding to the first transmission layer and a partial vector corresponding to the second transmission layer, the spatial vectors in the second set of spatial vectors include a portion vector corresponding to the first transmission layer, a portion vector corresponding to the second transmission layer, a portion vector corresponding to the third transmission layer, and a portion vector corresponding to the fourth transmission layer, the spatial vectors in the third set of spatial vectors comprises a portion of vectors corresponding to the third transmission layer and a portion of vectors corresponding to the fourth transmission layer, the first indication information further includes information corresponding to the third space vector set, and the number of bits carrying the information corresponding to the third space vector set in the first indication information is smaller than the number of bits carrying the information corresponding to the first space vector set.

Optionally, the value of N is 3, the N spatial vector sets further include a third spatial vector set, the spatial vectors in the first spatial vector set include partial vectors corresponding to the first transmission layer and the second transmission layer, the spatial vectors in the second spatial vector set include partial vectors corresponding to the first transmission layer, partial vectors corresponding to the second transmission layer and partial vectors corresponding to the third transmission layer, the spatial vectors in the third spatial vector set include partial vectors corresponding to the third transmission layer, the first indication information further includes information corresponding to the third spatial vector set, and the number of bits carrying the information corresponding to the third spatial vector set in the first indication information is smaller than the number of bits carrying the information corresponding to the first spatial vector set.

Optionally, the sum of squared amplitudes of the space-frequency combining coefficients corresponding to each transmission layer in the first set of space-frequency combining coefficients is greater than or equal to the sum of squared amplitudes of the space-frequency combining coefficients corresponding to the transmission layers in the second set of space-frequency combining coefficients, or a minimum value of the amplitude values corresponding to the space-frequency combining coefficients corresponding to each transmission layer in the first set of space-frequency combining coefficients is greater than or equal to a maximum value of the amplitude values of the space-frequency combining coefficients corresponding to the transmission layers in the second set of space-frequency combining coefficients, or a minimum value of the wide-band amplitude values corresponding to the space-frequency combining coefficients corresponding to each transmission layer in the first set of space-frequency combining coefficients is greater than or equal to a maximum value of the wide-band amplitude values of the space-frequency combining coefficients corresponding to the transmission layers in the second set of space-frequency combining coefficients.

Optionally, the N sets of space-frequency combining coefficients further include a third set of space-frequency combining coefficients and a fourth set of space-frequency combining coefficients, the third set of space-frequency combining coefficients corresponds to the third set of spatial vectors, the fourth set of space-frequency combining coefficients corresponds to the fourth set of spatial vectors, a sum of squared amplitudes of space-frequency combining coefficients corresponding to each transmission layer in the third set of space-frequency combining coefficients is greater than or equal to a sum of squared amplitudes of space-frequency combining coefficients of the transmission layers in the fourth set of space-frequency combining coefficients, or a minimum value of space-frequency combining coefficients corresponding to each transmission layer in the third set of space-frequency combining coefficients is greater than or equal to a maximum value of space-frequency combining coefficients in the fourth set of space-frequency combining coefficients, or a minimum value of wide-band amplitude values corresponding to space-frequency combining coefficients corresponding to each transmission layer in the third set of space-frequency combining coefficients is greater than or equal to a minimum value of space-frequency combining coefficients corresponding to the transmission layers in the fourth set of space-frequency combining coefficients The maximum of the wideband amplitude values of the coefficients are combined.

Optionally, the space vectors in the first space vector set include a space vector corresponding to a first polarization direction of the first transmission layer and a space vector corresponding to a first polarization direction of the second transmission layer, and the space vectors in the second space vector set include a space vector corresponding to a second polarization direction of the first transmission layer and a space vector corresponding to a second polarization direction of the second transmission layer.

Optionally, a value of N is 3, the N space vector sets further include a third space vector set, the space vectors in the third space vector set include a space vector corresponding to a first polarization direction of a third transmission layer and a space vector corresponding to a second polarization direction of the third transmission layer, the first indication information further includes information corresponding to the third space vector set, and a number of bits carrying the information corresponding to the third space vector set in the first indication information is smaller than a number of bits carrying the information corresponding to the first space vector set.

Optionally, a value of N is 3, the N space vector sets further include a third space vector set, a space vector in the third space vector set includes a space vector corresponding to a first polarization direction of a third transmission layer, a space vector corresponding to a second polarization direction of the third transmission layer, a space vector corresponding to a first polarization direction of a fourth transmission layer, and a space vector corresponding to a second polarization direction of the fourth transmission layer, the first indication information further includes information corresponding to the third space vector set, and a number of bits carrying the information corresponding to the third space vector set in the first indication information is smaller than a number of bits carrying the information corresponding to the first space vector set.

Optionally, the value of N is 4, the N sets of spatial vectors further include a third set of spatial vectors and a fourth set of spatial vectors, the spatial vectors in the third set of spatial vectors include a spatial vector corresponding to the first polarization direction of the third transmission layer and a spatial vector corresponding to the first polarization direction of the fourth transmission layer, the spatial vectors in the fourth set of spatial vectors include a spatial vector corresponding to the second polarization direction of the third transmission layer and a spatial vector corresponding to the second polarization direction of the fourth transmission layer, the first indication information further includes information corresponding to the third set of spatial vectors and information corresponding to the fourth set of spatial vectors, the bit number of the first indication information carrying the information corresponding to the third space vector set is larger than the bit number of the first indication information carrying the information corresponding to the fourth space vector set and smaller than the bit number of the first indication information carrying the information corresponding to the first space vector set.

Optionally, the value of N is 3, the N sets of spatial vectors further include a third set of spatial vectors, the spatial vectors in the first set of spatial vectors include spatial vectors corresponding to a first polarization direction of a first transmission layer and spatial vectors corresponding to a first polarization direction of a second transmission layer, the space domain vectors in the second space domain vector set comprise the space domain vector corresponding to the second polarization direction of the first transmission layer, the space domain vector corresponding to the second polarization direction of the second transmission layer and the space domain vector corresponding to the second polarization direction of the third transmission layer, the spatial vectors in the third set of spatial vectors comprise spatial vectors corresponding to the first polarization direction of the third transmission layer, the first indication information further includes information corresponding to the third space vector set, and the number of bits carrying the information corresponding to the third space vector set in the first indication information is smaller than the number of bits carrying the information corresponding to the first space vector set.

Optionally, the value of N is 3, the N sets of spatial vectors further include a third set of spatial vectors, the spatial vectors in the first set of spatial vectors comprise spatial vectors corresponding to a first polarization direction of a first transmission layer, the spatial vectors in the second set of spatial vectors include spatial vectors corresponding to a second polarization direction of the first transmission layer, the space domain vectors in the third space domain vector set comprise a space domain vector corresponding to the first polarization direction of the second transmission layer, a space domain vector corresponding to the first polarization direction of the third transmission layer, a space domain vector corresponding to the second polarization direction of the second transmission layer and a space domain vector corresponding to the second polarization direction of the third transmission layer, the first indication information further includes information corresponding to the third space vector set, and the number of bits carrying the information corresponding to the third space vector set in the first indication information is smaller than the number of bits carrying the information corresponding to the first space vector set.

Optionally, the value of N is 4, the N spatial vector sets further include a third spatial vector set and a fourth spatial vector set, the spatial vectors in the first spatial vector set include spatial vectors corresponding to the first polarization direction of the first transmission layer, the spatial vectors in the second spatial vector set include spatial vectors corresponding to the second polarization direction of the first transmission layer, the spatial vectors in the third spatial vector set include spatial vectors corresponding to the first polarization direction of the second transmission layer and spatial vectors corresponding to the first polarization direction of the third transmission layer, the spatial vectors in the fourth spatial vector set include spatial vectors corresponding to the second polarization direction of the second transmission layer and spatial vectors corresponding to the second polarization direction of the third transmission layer, and the first indication information further includes information corresponding to the third spatial vector set and information corresponding to the fourth spatial vector set, the bit number of the first indication information carrying the information corresponding to the third space vector set is larger than the bit number of the first indication information carrying the information corresponding to the fourth space vector set and smaller than the bit number of the first indication information carrying the information corresponding to the first space vector set.

Optionally, the reference amplitude value corresponding to the first polarization direction of the first transmission layer is greater than the reference amplitude value corresponding to the second polarization direction of the first transmission layer, and the reference amplitude value corresponding to the first polarization direction of the second transmission layer is greater than the reference amplitude value corresponding to the second polarization direction of the second transmission layer.

Optionally, the reference amplitude value corresponding to the first polarization direction of the third transmission layer is greater than the reference amplitude value corresponding to the second polarization direction of the third transmission layer.

Optionally, the reference amplitude value corresponding to the first polarization direction of the fourth transmission layer is greater than the reference amplitude value corresponding to the second polarization direction of the fourth transmission layer.

Optionally, the frequency domain vectors in the second set of frequency domain vectors corresponding to the first transmission layer are determined from the frequency domain vectors in the first set of frequency domain vectors corresponding to the first transmission layer, and the frequency domain vectors in the second set of frequency domain vectors corresponding to the second transmission layer are determined from the frequency domain vectors in the first set of frequency domain vectors corresponding to the second transmission layer.

Optionally, the N sets of spatial vectors further include a third set of frequency domain vectors and a fourth set of frequency domain vectors, the third set of frequency domain vectors corresponds to the third set of spatial vectors, the fourth set of frequency domain vectors corresponds to the fourth set of spatial vectors, frequency domain vectors in the fourth set of frequency domain vectors corresponding to the third transmission layer are determined from frequency domain vectors in the third set of frequency domain vectors corresponding to the third transmission layer, and frequency domain vectors in the fourth set of frequency domain vectors corresponding to the fourth transmission layer are determined from frequency domain vectors in the third set of frequency domain vectors corresponding to the fourth transmission layer.

It should be understood that the apparatus 300 for indicating a precoding vector according to the embodiment of the present application may correspond to a terminal device in the embodiment of the method 200 according to the embodiment of the present application, and the apparatus 300 may include a module for performing the method performed by the terminal device in the embodiment of the method 200 in fig. 2. Moreover, the above and other operations and/or functions of each module in the apparatus 300 are respectively for implementing corresponding steps executed by the terminal device in the embodiment of the method 200 in fig. 2, so that beneficial effects in the foregoing embodiment of the method may also be implemented, and for brevity, no further description is provided here.

It should also be understood that the various modules in the apparatus 300 may be implemented in software and/or hardware, and are not particularly limited in this regard. In other words, the apparatus 300 is presented in the form of a functional module. As used herein, a "module" may refer to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other devices that may provide the described functionality. Alternatively, in a simple embodiment, one skilled in the art will recognize that the device 300 may take the form shown in FIG. 4. The processing module 301 may be implemented by a processor 401 and a memory 402 as shown in fig. 4. The transceiver module 302 may be implemented by the transceiver 403 shown in fig. 4. In particular, the processor is implemented by executing a computer program stored in the memory. Alternatively, when the apparatus 300 is a chip, then the functions and/or implementation procedures of the transceiver module 302 can also be implemented by pins or circuits, etc. Optionally, the memory is a storage unit in the chip, such as a register, a cache, and the like, and the storage unit may also be a storage unit located outside the chip in the computer device, such as the memory 402 shown in fig. 4.

Fig. 4 is a schematic block diagram of an apparatus 400 for indicating a precoding vector according to an embodiment of the present application. As shown in fig. 4, the apparatus 400 includes: a processor 401.

In one possible implementation, the processor 401 is configured to: generating first indication information indicating the P frequency domain vectors and the K space-frequency combining coefficients, the P frequency domain vectors belong to N sets of frequency domain vectors, the K space-frequency combining coefficients belong to N sets of space-frequency combining coefficients, the N frequency domain vector sets correspond to the N space domain vector sets one by one, the N space-frequency combining coefficient sets correspond to the N space domain vector sets one by one, the N sets of spatial vectors include at least a first set of spatial vectors and a second set of spatial vectors, and at least one set of spatial vectors of the N sets of spatial vectors corresponds to at least two transmission layers, N, P, K is greater than or equal to 2, the first indication information comprises information corresponding to the first space vector set and information corresponding to the second space vector set, the bit number of the first indication information carrying the information corresponding to the first space vector set is larger than the bit number of the information carrying the second space vector set.

The processor 401 is further configured to invoke an interface to perform the following actions: and sending the first indication information.

Optionally, the first indication information further comprisesFor indicating Q spatial vectors, Q being greater than or equal to 2, the Q spatial vectors comprising Q in the first set of spatial vectors₁A spatial vector and Q in the second set of spatial vectors₂A plurality of spatial vectors, wherein each spatial vector in the first set of spatial vectors corresponds to S frequency domain vectors, P₁Equal to S or P₁Is equal to S and Q₁S is greater than or equal to 1, each spatial vector in the second set of spatial vectors corresponds to R frequency domain vectors, P₂Equal to R or P₂Is equal to R and Q₂R is greater than or equal to 1.

Optionally, the processor 401 is further configured to invoke an interface to perform the following actions: receiving second indication information indicating at least one of: the number Q of space vectors in the first set of space vectors₁The number Q of the space vectors in the second space vector set₂The number P of the frequency domain vectors in the first frequency domain vector set₁The number P of the frequency domain vectors in the second frequency domain vector set₂The number of space-frequency combining coefficients in the first space-frequency combining coefficient set and the number of space-frequency combining coefficients in the second space-frequency combining coefficient set.

Optionally, the sum of squared amplitudes of the space-frequency combining coefficients corresponding to each transmission layer in the first set of space-frequency combining coefficients is greater than or equal to the sum of squared amplitudes of the space-frequency combining coefficients corresponding to the transmission layers in the second set of space-frequency combining coefficients, or the minimum value corresponding to each transmission layer in the amplitude values corresponding to the space-frequency combining coefficients in the first set of space-frequency combining coefficients is greater than or equal to the maximum value in the amplitude values of the space-frequency combining coefficients corresponding to the transmission layers in the second set of space-frequency combining coefficients, or the minimum value in the wideband amplitude values corresponding to the space-frequency combining coefficients corresponding to each transmission layer in the first set of space-frequency combining coefficients is greater than or equal to the maximum value in the wideband amplitude values of the space-frequency combining coefficients corresponding to the transmission layers in the second set of space-frequency combining coefficients.

Optionally, the N sets of space-frequency combining coefficients further include a third set of space-frequency combining coefficients and a fourth set of space-frequency combining coefficients, the third set of space-frequency combining coefficients corresponds to the third set of space-frequency vectors, the fourth set of space-frequency combining coefficients corresponds to the fourth set of space-frequency vectors, a sum of squared amplitudes of space-frequency combining coefficients corresponding to each transmission layer in the third set of space-frequency combining coefficients is greater than or equal to a sum of squared amplitudes of space-frequency combining coefficients of the transmission layers in the fourth set of space-frequency combining coefficients, or a minimum value of amplitude values corresponding to space-frequency combining coefficients corresponding to each transmission layer in the third set of space-frequency combining coefficients is greater than or equal to a maximum value of amplitude values of space-frequency combining coefficients of the transmission layers in the fourth set of space-frequency combining coefficients, or a minimum value of broadband amplitude values corresponding to space-frequency combining coefficients corresponding to each transmission layer in the third set of space-frequency combining coefficients is greater than or equal to a minimum value of space-frequency combining coefficients corresponding to the transmission layers in the fourth set of space-frequency combining coefficients The maximum of the wideband amplitude values of the coefficients are combined.

It should be understood that the processor 401 may call an interface to perform the above receiving action, where the called interface may be a logical interface or a physical interface, and the embodiment of the present application is not limited thereto. Alternatively, the physical interface may be implemented by a transceiver. Optionally, the apparatus 400 may further comprise a transceiver 403.

Optionally, the apparatus 400 further includes a memory 402, where the program code in the above method embodiments may be stored in the memory 402, so as to be called by the processor 401.

Specifically, if the apparatus 400 includes a processor 401, a memory 402 and a transceiver 403, the processor 401, the memory 402 and the transceiver 403 communicate with each other via internal connection paths to transmit control and/or data signals. In one possible design, the processor 401, the memory 402, and the transceiver 403 may be implemented by chips, and the processor 401, the memory 402, and the transceiver 403 may be implemented in the same chip, or may be implemented in different chips, or any two functions may be combined and implemented in one chip. The memory 402 may store program code, which the processor 401 calls to implement the respective functions of the apparatus 400, stored by the memory 402.

It should be understood that the apparatus 400 may also be used to perform other steps and/or operations on the terminal device side in the foregoing embodiments, and details are not described herein for brevity.

Fig. 5 shows a schematic block diagram of an apparatus 500 for determining a precoding vector according to an embodiment of the present application. The apparatus 500 is configured to perform the method performed by the network device in the foregoing method embodiment. Alternatively, the specific form of the apparatus 500 may be a chip in a network device. The embodiments of the present application do not limit this. The apparatus 500 comprises:

a transceiver module 501, configured to receive first indication information, where the first indication information is used to indicate P frequency domain vectors and K space-frequency combining coefficients, the P frequency domain vectors belong to N sets of frequency domain vectors, the K space-frequency combining coefficients belong to N sets of space-frequency combining coefficients, the N frequency domain vector sets correspond to the N space domain vector sets one by one, the N space-frequency combining coefficient sets correspond to the N space domain vector sets one by one, the N sets of spatial vectors include at least a first set of spatial vectors and a second set of spatial vectors, and at least one set of spatial vectors of the N sets of spatial vectors corresponds to at least two transmission layers, N, P, K is greater than or equal to 2, the first indication information comprises information corresponding to the first space vector set and information corresponding to the second space vector set, the bit number of the first indication information carrying the information corresponding to the first space vector set is larger than the bit number of the information carrying the second space vector set.

A processing module 502, configured to determine a precoding vector according to the first indication information.

Optionally, the N sets of frequency domain vectors include a first set of frequency domain vectors and a second set of frequency domain vectorsThe P frequency domain vectors include P in the first set of frequency domain vectors₁A frequency domain vector and P in the second set of frequency domain vectors₂A plurality of frequency domain vectors, the first set of frequency domain vectors corresponding to the first set of spatial vectors, the second set of frequency domain vectors corresponding to the second set of spatial vectors, P₁Greater than P₂And P is₂Greater than or equal to 1.

Optionally, the transceiver module 501 is further configured to send second indication information, where the second indication information indicates at least one of the following: the number Q of space vectors in the first set of space vectors₁The number Q of the space vectors in the second space vector set₂In the first set of frequency domain vectorsNumber of frequency domain vectors P₁The number P of the frequency domain vectors in the second frequency domain vector set₂The number of space-frequency combining coefficients in the first space-frequency combining coefficient set and the number of space-frequency combining coefficients in the second space-frequency combining coefficient set.

Optionally, L in the first set of spatial vectors₁The spatial vectors include a partial vector corresponding to the first transmission layer and a partial vector corresponding to the second transmission layer, L in the second set of spatial vectors₂The spatial vectors include a partial vector corresponding to the first transmission layer and a partial vector corresponding to the second transmission layer.

It should be understood that the apparatus 500 for determining a precoding vector according to an embodiment of the present application may correspond to a network device in the embodiment of the method 200 according to an embodiment of the present application, and the apparatus 500 may include a module for performing the method performed by the network device in the embodiment of the method 200 in fig. 2. Moreover, the above and other operations and/or functions of each module in the apparatus 500 are respectively for implementing corresponding steps executed by the network device in the embodiment of the method 200 in fig. 2, so that beneficial effects in the foregoing embodiment of the method may also be implemented, and for brevity, no further description is provided here.

It should also be understood that the various modules in the apparatus 500 may be implemented in software and/or hardware, and are not particularly limited in this regard. In other words, the apparatus 500 is presented in the form of a functional module. As used herein, a "module" may refer to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other devices that may provide the described functionality. Alternatively, in a simple embodiment, one skilled in the art will recognize that the device 500 may take the form shown in FIG. 6. The processing module 501 may be implemented by the processor 601 and the memory 602 shown in fig. 6. The transceiver module 502 may be implemented by the transceiver 603 shown in fig. 6. In particular, the processor is implemented by executing a computer program stored in the memory. Alternatively, when the apparatus 500 is a chip, the functions and/or implementation processes of the transceiver module 502 can be implemented by pins or circuits. Optionally, the memory is a storage unit in the chip, such as a register, a cache, and the like, and the storage unit may also be a storage unit located outside the chip in the computer device, such as the memory 602 shown in fig. 6.

Fig. 6 is a schematic block diagram illustrating an apparatus 600 for determining a precoding vector according to an embodiment of the present application. As shown in fig. 6, the apparatus 600 includes: a processor 601.

In one possible implementation, the processor 601 is configured to invoke an interface to perform the following actions: receiving first indication information indicating P frequency domain vectors and K space-frequency combining coefficients, the P frequency domain vectors belong to N sets of frequency domain vectors, the K space-frequency combining coefficients belong to N sets of space-frequency combining coefficients, the N frequency domain vector sets correspond to the N space domain vector sets one by one, the N space-frequency combining coefficient sets correspond to the N space domain vector sets one by one, the N sets of spatial vectors include at least a first set of spatial vectors and a second set of spatial vectors, and at least one set of spatial vectors of the N sets of spatial vectors corresponds to at least two transmission layers, N, P, K is greater than or equal to 2, the first indication information comprises information corresponding to the first space vector set and information corresponding to the second space vector set, the bit number of the first indication information carrying the information corresponding to the first space vector set is larger than the bit number of the information carrying the second space vector set.

The processor 601 is further configured to: and determining a precoding vector according to the first indication information.

Optionally, the processor 601 is further configured to invoke an interface to perform the following actions: sending second indication information, wherein the second indication information is used for indicating at least one of the following items: the number Q of space vectors in the first set of space vectors₁The number Q of the space vectors in the second space vector set₂The number P of the frequency domain vectors in the first frequency domain vector set₁The number P of the frequency domain vectors in the second frequency domain vector set₂The number of space-frequency combining coefficients in the first space-frequency combining coefficient set and the number of space-frequency combining coefficients in the second space-frequency combining coefficient set.

Optionally, L in the first set of spatial vectors₁The space-domain vectors include a partial vector corresponding to the first transmission layer and a partial vector corresponding to the second transmission layerL in a set of domain vectors₂The spatial vectors include a partial vector corresponding to the first transmission layer and a partial vector corresponding to the second transmission layer.

It should be understood that the processor 601 may call an interface to perform the above receiving action, where the called interface may be a logical interface or a physical interface, and the embodiment of the present application is not limited thereto. Alternatively, the physical interface may be implemented by a transceiver. Optionally, the apparatus 600 may further comprise a transceiver 603.

Optionally, the apparatus 600 further includes a memory 602, and the memory 602 may store the program codes in the above method embodiments, so as to be called by the processor 601.

Specifically, if the apparatus 600 includes the processor 601, the memory 602, and the transceiver 603, the processor 601, the memory 602, and the transceiver 603 communicate with each other through the internal connection path to transmit control and/or data signals. In one possible design, the processor 601, the memory 602, and the transceiver 603 may be implemented by chips, and the processor 601, the memory 602, and the transceiver 603 may be implemented in the same chip, or may be implemented in different chips, or any two functions may be implemented in one chip. The memory 602 may store program code, which the processor 601 calls to implement the corresponding functions of the apparatus 600 stored in the memory 602.

It should be understood that the apparatus 600 may also be used to perform other steps and/or operations on the terminal device side in the foregoing embodiments, and details are not described herein for brevity.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of indicating a precoding vector, comprising:

generating first indication information, where the first indication information is used to indicate P frequency domain vectors and K space-frequency merging coefficients, where the P frequency domain vectors belong to N frequency domain vector sets, the K space-frequency merging coefficients belong to N space-frequency merging coefficient sets, the N frequency domain vector sets correspond to the N space domain vector sets one to one, the N space-frequency merging coefficient sets correspond to the N space domain vector sets one to one, the N space domain vector sets at least include a first space domain vector set and a second space domain vector set, at least one space domain vector set in the N space domain vector sets corresponds to at least two transmission layers, N, P, K is greater than or equal to 2, the first indication information includes information corresponding to the first space domain vector set and information corresponding to the second space domain vector set, and the number of space domains carrying information corresponding to the first space domain vector set in the first indication information is greater than the ratio of carrying information corresponding to the second space domain set A number of bits;

And sending the first indication information.

2. The method of claim 1, wherein the set of N frequency domain vectors comprises a first set of frequency domain vectors and a second set of frequency domain vectors, and wherein the P frequency domain vectors comprise P of the first set of frequency domain vectors₁A frequency domain vector and P in the second set of frequency domain vectors₂A plurality of frequency domain vectors, the first set of frequency domain vectors corresponding to the first set of spatial vectors, the second set of frequency domain vectors corresponding to the second set of spatial vectors, P₁Greater than P₂And P is₂Greater than or equal to 1.

3. The method according to claim 1 or 2, wherein the N sets of space-frequency combining coefficients include a first set of space-frequency combining coefficients and a second set of space-frequency combining coefficients, the first set of space-frequency combining coefficients corresponds to the first set of spatial vectors, the second set of space-frequency combining coefficients corresponds to the second set of spatial vectors, and the number of quantization bits of each space-frequency combining coefficient in the first set of space-frequency combining coefficients is greater than the number of quantization bits of each space-frequency combining coefficient in the second set of space-frequency combining coefficients.

4. The method of claim 3, wherein the quantization bits for each space-frequency combining coefficient in the first set of space-frequency combining coefficients comprise at least one of amplitude quantization bits and phase quantization bits;

The quantization bits of each space-frequency combination coefficient in the second set of space-frequency combination coefficients comprise at least one of amplitude quantization bits and phase quantization bits.

5. The method of claim 2, wherein the first indication information is further used to indicate Q spatial vectors, Q being greater than or equal to 2, the Q spatial vectors comprising Q in the first set of spatial vectors₁A spatial vector and Q in the second set of spatial vectors₂A spatial domain vector of the spatial domain vector,

wherein each space domain vector in the first set of space domain vectors corresponds to S frequency domain vectors, P₁Equal to S or P₁Is equal to S and Q₁S is greater than or equal to 1, each spatial vector in the second set of spatial vectors corresponds to R frequency domain vectors, P₂Equal to R or P₂Is equal to R and Q₂R is greater than or equal to 1.

6. The method of claim 3, further comprising:

receiving second indication information, wherein the second indication information is used for indicating at least one of the following items:

the number Q of space vectors in the first set of space vectors₁And the number Q of the space vectors in the second space vector set₂The number P of frequency domain vectors in the first frequency domain vector set ₁The number P of frequency domain vectors in the second set of frequency domain vectors₂The number of space-frequency merging coefficients in the first space-frequency merging coefficient set and the number of space-frequency merging coefficients in the second space-frequency merging coefficient set.

7. The method of claim 6, wherein the number of space-frequency combining coefficients in the first set of space-frequency combining coefficients is greater than the number of space-frequency combining coefficients in the second set of space-frequency combining coefficients.

8. The method of claim 1 or 2, wherein L in the first set of spatial vectors₁The space-domain vectors include a partial vector corresponding to a first transmission layer and a partial vector corresponding to a second transmission layer, L in the second set of space-domain vectors₂The spatial vectors include a partial vector corresponding to the first transmission layer and a partial vector corresponding to the second transmission layer.

9. The method according to claim 8, wherein a value of N is 3, the N spatial vector sets further include a third spatial vector set, spatial vectors in the third spatial vector set include all vectors corresponding to a third transmission layer, the first indication information further includes information corresponding to the third spatial vector set, and a number of bits carrying the information corresponding to the third spatial vector set in the first indication information is smaller than a number of bits carrying the information corresponding to the first spatial vector set.

10. The method according to claim 8, wherein a value of N is 3, the N spatial vector sets further include a third spatial vector set, spatial vectors in the third spatial vector set include all vectors corresponding to a third transmission layer and all vectors corresponding to a fourth transmission layer, the first indication information further includes information corresponding to the third spatial vector set, and a number of bits carrying the information corresponding to the third spatial vector set in the first indication information is smaller than a number of bits carrying the information corresponding to the first spatial vector set.

11. The method of claim 8, wherein N is 4, wherein the N sets of spatial vectors further comprise a third set of spatial vectors and a fourth set of spatial vectors, the spatial vectors in the third set of spatial vectors comprise a portion of vectors corresponding to a third transmission layer and a portion of vectors corresponding to a fourth transmission layer, the spatial vectors in the fourth set of spatial vectors include a portion vector corresponding to the third transmission layer and a portion vector corresponding to the fourth transmission layer, the first indication information further includes information corresponding to the third set of spatial vectors and information corresponding to the fourth set of spatial vectors, the bit number of the first indication information carrying the information corresponding to the third space vector set is larger than the bit number of the first indication information carrying the information corresponding to the fourth space vector set and smaller than the bit number of the first indication information carrying the information corresponding to the first space vector set.

12. The method of claim 1 or 2, wherein N has a value of 3, the N spatial vector sets further comprise a third spatial vector set, the spatial vectors in the first spatial vector set comprise partial vectors corresponding to the first transmission layer and the second transmission layer, the spatial vectors in the second set of spatial vectors include a portion of vectors corresponding to the first transmission layer, a portion of vectors corresponding to the second transmission layer, and a portion of vectors corresponding to a third transmission layer, the spatial vectors in the third set of spatial vectors comprise a portion of the vectors corresponding to the third transmission layer, the first indication information further includes information corresponding to the third space vector set, and the number of bits carrying the information corresponding to the third space vector set in the first indication information is smaller than the number of bits carrying the information corresponding to the first space vector set.

13. The method according to claim 1 or 2, wherein the sum of the number of spatial vectors in the N sets of spatial vectors is equal to the sum of the number of spatial vectors corresponding to all transmission layers.

14. The method according to claim 8, wherein a sum of squared amplitudes of the space-frequency combining coefficients corresponding to each transmission layer in the first set of space-frequency combining coefficients is greater than or equal to a sum of squared amplitudes of the space-frequency combining coefficients corresponding to the transmission layer in the second set of space-frequency combining coefficients, or a minimum value of the amplitude values corresponding to the space-frequency combining coefficients corresponding to each transmission layer in the first set of space-frequency combining coefficients is greater than or equal to a maximum value of the amplitude values of the space-frequency combining coefficients corresponding to the transmission layer in the second set of space-frequency combining coefficients, or a minimum value of the wideband amplitude values corresponding to the space-frequency combining coefficients corresponding to each transmission layer in the first set of space-frequency combining coefficients is greater than or equal to a maximum value of the wideband amplitude values of the space-frequency combining coefficients corresponding to the transmission layer in the second set of space-frequency combining coefficients.

15. The method according to claim 11, wherein the N sets of space-frequency combining coefficients further include a third set of space-frequency combining coefficients and a fourth set of space-frequency combining coefficients, the third set of space-frequency combining coefficients corresponds to the third set of space-frequency vectors, the fourth set of space-frequency combining coefficients corresponds to the fourth set of space-frequency vectors, a sum of squared amplitudes of the space-frequency combining coefficients corresponding to each transmission layer in the third set of space-frequency combining coefficients is greater than or equal to a sum of squared amplitudes of the space-frequency combining coefficients corresponding to the transmission layer in the fourth set of space-frequency combining coefficients, or a minimum value of the amplitude values corresponding to the space-frequency combining coefficients corresponding to each transmission layer in the third set of space-frequency combining coefficients is greater than or equal to a maximum value of the amplitude values of the space-frequency combining coefficients corresponding to the transmission layer in the fourth set of space-frequency combining coefficients, or a wideband amplitude corresponding to the space-frequency combining coefficients corresponding to each transmission layer in the third set of space-frequency combining coefficients is greater than or equal to a wideband amplitude corresponding to the space-frequency combining coefficients corresponding to the fourth set of space-frequency combining coefficients The minimum value of the values is greater than or equal to the maximum value of the wideband amplitude values of the space-frequency combining coefficients of the transmission layer in the fourth set of space-frequency combining coefficients.

16. The method of claim 1 or 2, wherein the spatial vectors in the first set of spatial vectors comprise spatial vectors corresponding to a first polarization direction of a first transmission layer and spatial vectors corresponding to a first polarization direction of a second transmission layer, and wherein the spatial vectors in the second set of spatial vectors comprise spatial vectors corresponding to a second polarization direction of the first transmission layer and spatial vectors corresponding to a second polarization direction of the second transmission layer.

17. The method according to claim 16, wherein a value of N is 3, the N spatial vector sets further include a third spatial vector set, spatial vectors in the third spatial vector set include a spatial vector corresponding to a first polarization direction of a third transmission layer and a spatial vector corresponding to a second polarization direction of the third transmission layer, the first indication information further includes information corresponding to the third spatial vector set, and a number of bits carrying the information corresponding to the third spatial vector set in the first indication information is smaller than a number of bits carrying the information corresponding to the first spatial vector set.

18. The method according to claim 16, wherein a value of N is 3, the N spatial vector sets further include a third spatial vector set, spatial vectors in the third spatial vector set include a spatial vector corresponding to a first polarization direction of a third transmission layer, a spatial vector corresponding to a second polarization direction of the third transmission layer, a spatial vector corresponding to a first polarization direction of a fourth transmission layer, and a spatial vector corresponding to a second polarization direction of the fourth transmission layer, the first indication information further includes information corresponding to the third spatial vector set, and a number of bits carrying the information corresponding to the third spatial vector set in the first indication information is smaller than a number of bits carrying the information corresponding to the first spatial vector set.

19. The method according to claim 16, wherein N is 4, the N sets of spatial vectors further include a third set of spatial vectors and a fourth set of spatial vectors, the spatial vectors in the third set of spatial vectors include spatial vectors corresponding to a first polarization direction of a third transmission layer and spatial vectors corresponding to a first polarization direction of a fourth transmission layer, the spatial vectors in the fourth set of spatial vectors include spatial vectors corresponding to a second polarization direction of the third transmission layer and spatial vectors corresponding to a second polarization direction of a fourth transmission layer, the first indication information further includes information corresponding to the third set of spatial vectors and information corresponding to the fourth set of spatial vectors, the first indication information carries information corresponding to the third set of spatial vectors in a larger number of bits than the information corresponding to the fourth set of spatial vectors, and the number of bits is less than the number of bits of the information corresponding to the first space vector set.

20. The method according to claim 1 or 2, wherein a value of N is 3, the N spatial vector sets further include a third spatial vector set, the spatial vectors in the first spatial vector set include a spatial vector corresponding to a first polarization direction of a first transmission layer and a spatial vector corresponding to a first polarization direction of a second transmission layer, the spatial vectors in the second spatial vector set include a spatial vector corresponding to a second polarization direction of the first transmission layer, a spatial vector corresponding to a second polarization direction of the second transmission layer and a spatial vector corresponding to a second polarization direction of a third transmission layer, the spatial vectors in the third spatial vector set include a spatial vector corresponding to a first polarization direction of the third transmission layer, the first indication information further includes vector information corresponding to the third spatial vector set, and a number of bits carrying information corresponding to the third spatial vector set in the first indication information is smaller than a number of bits carrying information corresponding to the first spatial vector set The number of bits of information corresponding to the set of domain vectors.

21. The method according to claim 1 or 2, wherein a value of N is 3, the N sets of spatial vectors further include a third set of spatial vectors, the spatial vectors in the first set of spatial vectors include spatial vectors corresponding to a first polarization direction of a first transmission layer, the spatial vectors in the second set of spatial vectors include spatial vectors corresponding to a second polarization direction of the first transmission layer, the spatial vectors in the third set of spatial vectors include spatial vectors corresponding to the first polarization direction of a second transmission layer, spatial vectors corresponding to the first polarization direction of a third transmission layer, spatial vectors corresponding to the second polarization direction of the second transmission layer and spatial vectors corresponding to the second polarization direction of the third transmission layer, the first indication information further includes information corresponding to the third set of spatial vectors, and a number of bits of the first indication information carrying information corresponding to the third set of spatial vectors is smaller than a number of bits carrying information corresponding to the third set of spatial vectors The bit number of the information corresponding to a space vector set.

22. The method according to claim 1 or 2, wherein N is 4, the N sets of spatial vectors further include a third set of spatial vectors and a fourth set of spatial vectors, the spatial vectors in the first set of spatial vectors include spatial vectors corresponding to the first polarization direction of the first transmission layer, the spatial vectors in the second set of spatial vectors include spatial vectors corresponding to the second polarization direction of the first transmission layer, the spatial vectors in the third set of spatial vectors include spatial vectors corresponding to the first polarization direction of the second transmission layer and corresponding to the first polarization direction of the third transmission layer, the spatial vectors in the fourth set of spatial vectors include spatial vectors corresponding to the second polarization direction of the second transmission layer and corresponding to the second polarization direction of the third transmission layer, the first indication information further includes information corresponding to the spatial vectors in the third set and corresponding to the fourth set, the bit number of the first indication information carrying the information corresponding to the third space vector set is larger than the bit number of the first indication information carrying the information corresponding to the fourth space vector set and smaller than the bit number of the first indication information carrying the information corresponding to the first space vector set.

23. The method of claim 16, wherein the reference amplitude value corresponding to the first polarization direction of the first transmission layer is larger than the reference amplitude value corresponding to the second polarization direction of the first transmission layer, and wherein the reference amplitude value corresponding to the first polarization direction of the second transmission layer is larger than the reference amplitude value corresponding to the second polarization direction of the second transmission layer.

24. The method of claim 17, wherein the reference amplitude value corresponding to the first polarization direction of the third transmission layer is larger than the reference amplitude value corresponding to the second polarization direction of the third transmission layer.

25. The method of claim 18, wherein the reference amplitude value corresponding to the first polarization direction of the fourth transmission layer is larger than the reference amplitude value corresponding to the second polarization direction of the fourth transmission layer.

26. The method of claim 16, wherein the frequency domain vectors in the second set of frequency domain vectors corresponding to the first transmission layer are determined from frequency domain vectors in the first set of frequency domain vectors corresponding to the first transmission layer, and wherein the frequency domain vectors in the second set of frequency domain vectors corresponding to the second transmission layer are determined from frequency domain vectors in the first set of frequency domain vectors corresponding to the second transmission layer.

27. The method of claim 19, wherein the N sets of spatial vectors further include a third set of frequency domain vectors corresponding to the third set of spatial vectors and a fourth set of frequency domain vectors corresponding to the fourth set of spatial vectors, wherein frequency domain vectors in the fourth set of frequency domain vectors corresponding to the third transmission layer are determined from frequency domain vectors in the third set of frequency domain vectors corresponding to the third transmission layer, and wherein frequency domain vectors in the fourth set of frequency domain vectors corresponding to the fourth transmission layer are determined from frequency domain vectors in the third set of frequency domain vectors corresponding to the fourth transmission layer.

28. A method of determining a precoding vector, comprising:

receiving first indication information, where the first indication information is used to indicate P frequency domain vectors and K space-frequency merging coefficients, where the P frequency domain vectors belong to N frequency domain vector sets, the K space-frequency merging coefficients belong to N space-frequency merging coefficient sets, the N frequency domain vector sets correspond to the N space domain vector sets one to one, the N space-frequency merging coefficient sets correspond to the N space domain vector sets one to one, the N space domain vector sets at least include a first space domain vector set and a second space domain vector set, at least one space domain vector set in the N space domain vector sets corresponds to at least two transmission layers, N, P, K is greater than or equal to 2, the first indication information includes information corresponding to the first space domain vector set and information corresponding to the second space domain vector set, and the number of space domains carrying information corresponding to the first space domain vector set in the first indication information is greater than the ratio of information corresponding to the second space domain set A number of bits;

And determining a precoding vector according to the first indication information.

29. The method as recited in claim 28 wherein the sets of N frequency-domain vectors comprise a first set of frequency-domain vectors and a second set of frequency-domain vectors, the P frequency-domain vectors comprising P of the first set of frequency-domain vectors₁A frequency domain vector and P in the second set of frequency domain vectors₂A plurality of frequency domain vectors, the first set of frequency domain vectors corresponding to the first set of spatial vectors, the second set of frequency domain vectors corresponding to the second set of spatial vectors, P₁Greater than P₂And P is₂Greater than or equal to 1.

30. The method according to claim 28 or 29, wherein the N sets of space-frequency combining coefficients comprise a first set of space-frequency combining coefficients and a second set of space-frequency combining coefficients, the first set of space-frequency combining coefficients corresponds to the first set of spatial vectors, the second set of space-frequency combining coefficients corresponds to the second set of spatial vectors, and the number of quantization bits of each space-frequency combining coefficient in the first set of space-frequency combining coefficients is greater than the number of quantization bits of each space-frequency combining coefficient in the second set of space-frequency combining coefficients.

31. The method of claim 30, wherein the quantization bits for each space-frequency combining coefficient in the first set of space-frequency combining coefficients comprise at least one of amplitude quantization bits and phase quantization bits;

32. The method of claim 29, wherein the first indication information is further used for indicating Q spatial vectors, Q being greater than or equal to 2, the Q spatial vectors comprising Q in the first set of spatial vectors₁A spatial vector and Q in the second set of spatial vectors₂A spatial domain vector of the spatial domain vector,

33. The method of claim 30, further comprising:

sending second indication information, wherein the second indication information is used for indicating at least one of the following items:

34. The method of claim 33, wherein the number of space-frequency combining coefficients in the first set of space-frequency combining coefficients is greater than the number of space-frequency combining coefficients in the second set of space-frequency combining coefficients.

35. The method of claim 28 or 29, wherein L in the first set of spatial vectors₁The space-domain vectors include a partial vector corresponding to a first transmission layer and a partial vector corresponding to a second transmission layer, L in the second set of space-domain vectors₂The spatial vectors include a partial vector corresponding to the first transmission layer and a partial vector corresponding to the second transmission layer.

36. The method according to claim 35, wherein a value of N is 3, the N spatial vector sets further include a third spatial vector set, spatial vectors in the third spatial vector set include all vectors corresponding to a third transmission layer, the first indication information further includes information corresponding to the third spatial vector set, and a number of bits carrying the information corresponding to the third spatial vector set in the first indication information is smaller than a number of bits carrying the information corresponding to the first spatial vector set.

37. The method according to claim 35, wherein a value of N is 3, the N spatial vector sets further include a third spatial vector set, spatial vectors in the third spatial vector set include all vectors corresponding to a third transmission layer and all vectors corresponding to a fourth transmission layer, the first indication information further includes information corresponding to the third spatial vector set, and a number of bits carrying the information corresponding to the third spatial vector set in the first indication information is smaller than a number of bits carrying the information corresponding to the first spatial vector set.

38. The method of claim 35, wherein N is 4, wherein the N sets of spatial vectors further comprise a third set of spatial vectors and a fourth set of spatial vectors, the spatial vectors in the third set of spatial vectors comprise a portion of vectors corresponding to a third transmission layer and a portion of vectors corresponding to a fourth transmission layer, the spatial vectors in the fourth set of spatial vectors include a portion vector corresponding to the third transmission layer and a portion vector corresponding to the fourth transmission layer, the first indication information further includes information corresponding to the third set of spatial vectors and information corresponding to the fourth set of spatial vectors, the bit number of the first indication information carrying the information corresponding to the third space vector set is larger than the bit number of the first indication information carrying the information corresponding to the fourth space vector set and smaller than the bit number of the first indication information carrying the information corresponding to the first space vector set.

39. The method of claim 28 or 29, wherein N has a value of 3, the N spatial vector sets further comprise a third spatial vector set, the spatial vectors in the first spatial vector set comprise partial vectors corresponding to the first transmission layer and the second transmission layer, the spatial vectors in the second set of spatial vectors include a portion of vectors corresponding to the first transmission layer, a portion of vectors corresponding to the second transmission layer, and a portion of vectors corresponding to a third transmission layer, the spatial vectors in the third set of spatial vectors comprise a portion of the vectors corresponding to the third transmission layer, the first indication information further includes information corresponding to the third space vector set, and the number of bits carrying the information corresponding to the third space vector set in the first indication information is smaller than the number of bits carrying the information corresponding to the first space vector set.

40. The method of claim 28 or 29, wherein a sum of a number of spatial vectors in the N sets of spatial vectors is equal to a sum of a number of spatial vectors for all transmission layers.

41. The method as claimed in claim 35, wherein a sum of squared amplitudes of the space-frequency combining coefficients corresponding to each transmission layer in the first set of space-frequency combining coefficients is greater than or equal to a sum of squared amplitudes of the space-frequency combining coefficients corresponding to the transmission layer in the second set of space-frequency combining coefficients, or a minimum value of the amplitude values corresponding to the space-frequency combining coefficients corresponding to each transmission layer in the first set of space-frequency combining coefficients is greater than or equal to a maximum value of the amplitude values of the space-frequency combining coefficients corresponding to the transmission layer in the second set of space-frequency combining coefficients, or a minimum value of the wideband amplitude values corresponding to the space-frequency combining coefficients corresponding to each transmission layer in the first set of space-frequency combining coefficients is greater than or equal to a maximum value of the wideband amplitude values of the space-frequency combining coefficients corresponding to the transmission layer in the second set of space-frequency combining coefficients.

42. The method of claim 38, wherein the N sets of space-frequency combining coefficients further include a third set of space-frequency combining coefficients and a fourth set of space-frequency combining coefficients, the third set of space-frequency combining coefficients corresponds to the third set of spatial vectors, the fourth set of space-frequency combining coefficients corresponds to the fourth set of spatial vectors, a sum of squared amplitudes of the space-frequency combining coefficients corresponding to each transmission layer in the third set of space-frequency combining coefficients is greater than or equal to a sum of squared amplitudes of the space-frequency combining coefficients of the transmission layer in the fourth set of space-frequency combining coefficients, or a minimum value of the amplitude values corresponding to the space-frequency combining coefficients of each transmission layer in the third set of space-frequency combining coefficients is greater than or equal to a maximum value of the amplitude values corresponding to the space-frequency combining coefficients of the transmission layer in the fourth set of space-frequency combining coefficients, or a wide-band amplitude value corresponding to each transmission layer in the third set of space-frequency combining coefficients Is greater than or equal to the maximum value in the wideband amplitude values of the space-frequency combining coefficients of the transport layer in the fourth set of space-frequency combining coefficients.

43. The method of claim 28 or 29, wherein the spatial vectors in the first set of spatial vectors comprise spatial vectors corresponding to a first polarization direction of a first transmission layer and spatial vectors corresponding to a first polarization direction of a second transmission layer, and wherein the spatial vectors in the second set of spatial vectors comprise spatial vectors corresponding to a second polarization direction of the first transmission layer and spatial vectors corresponding to a second polarization direction of the second transmission layer.

44. The method according to claim 43, wherein N is 3, the N spatial vector sets further include a third spatial vector set, the spatial vectors in the third spatial vector set include spatial vectors corresponding to a first polarization direction of a third transmission layer and spatial vectors corresponding to a second polarization direction of the third transmission layer, the first indication information further includes information corresponding to the third spatial vector set, and a number of bits carrying the information corresponding to the third spatial vector set in the first indication information is smaller than a number of bits carrying the information corresponding to the first spatial vector set.

45. The method according to claim 43, wherein N is 3, the N sets of spatial vectors further include a third set of spatial vectors, the spatial vectors in the third set of spatial vectors include a spatial vector corresponding to a first polarization direction of a third transmission layer, a spatial vector corresponding to a second polarization direction of the third transmission layer, a spatial vector corresponding to a first polarization direction of a fourth transmission layer, and a spatial vector corresponding to a second polarization direction of the fourth transmission layer, the first indication information further includes information corresponding to the third set of spatial vectors, and the number of bits carrying the information corresponding to the third set of spatial vectors in the first indication information is smaller than the number of bits carrying the information corresponding to the first set of spatial vectors.

46. The method of claim 43, wherein N is 4, the N sets of spatial vectors further comprise a third set of spatial vectors and a fourth set of spatial vectors, the spatial vectors in the third set of spatial vectors comprise spatial vectors corresponding to a first polarization direction of a third transmission layer and spatial vectors corresponding to a first polarization direction of a fourth transmission layer, the spatial vectors in the fourth set of spatial vectors comprise spatial vectors corresponding to a second polarization direction of the third transmission layer and spatial vectors corresponding to a second polarization direction of a fourth transmission layer, the first indication information further comprises information corresponding to the third set of spatial vectors and information corresponding to the fourth set of spatial vectors, and the number of bits of the information corresponding to the third set of spatial vectors in the first indication information is greater than the number of bits of the information corresponding to the fourth set of spatial vectors, and the number of bits is less than the number of bits of the information corresponding to the first space vector set.

47. The method according to claim 28 or 29, wherein the value of N is 3, the N spatial vector sets further include a third spatial vector set, the spatial vectors in the first spatial vector set include spatial vectors corresponding to the first polarization direction of the first transmission layer and spatial vectors corresponding to the first polarization direction of the second transmission layer, the spatial vectors in the second spatial vector set include spatial vectors corresponding to the second polarization direction of the first transmission layer, spatial vectors corresponding to the second polarization direction of the second transmission layer and spatial vectors corresponding to the second polarization direction of the third transmission layer, the spatial vectors in the third spatial vector set include spatial vectors corresponding to the first polarization direction of the third transmission layer, the first indication information further includes vector information corresponding to the third spatial vector set, and the number of bits carrying the information corresponding to the third spatial vector set in the first indication information is smaller than the number of bits carrying the information corresponding to the first spatial vector set The number of bits of information corresponding to the set of domain vectors.

48. The method according to claim 28 or 29, wherein the value of N is 3, the N sets of spatial vectors further include a third set of spatial vectors, the spatial vectors in the first set of spatial vectors include spatial vectors corresponding to the first polarization direction of the first transmission layer, the spatial vectors in the second set of spatial vectors include spatial vectors corresponding to the second polarization direction of the first transmission layer, the spatial vectors in the third set of spatial vectors include spatial vectors corresponding to the first polarization direction of the second transmission layer, spatial vectors corresponding to the first polarization direction of the third transmission layer, spatial vectors corresponding to the second polarization direction of the second transmission layer and spatial vectors corresponding to the second polarization direction of the third transmission layer, the first indication information further includes information corresponding to the third set of spatial vectors, and the number of bits of the first indication information carrying information corresponding to the third set of spatial vectors is smaller than the number of bits carrying information corresponding to the third set of spatial vectors The bit number of the information corresponding to a space vector set.

49. The method according to claim 28 or 29, wherein N is 4, the N sets of spatial vectors further include a third set of spatial vectors and a fourth set of spatial vectors, the spatial vectors in the first set of spatial vectors include spatial vectors corresponding to the first polarization direction of the first transmission layer, the spatial vectors in the second set of spatial vectors include spatial vectors corresponding to the second polarization direction of the first transmission layer, the spatial vectors in the third set of spatial vectors include spatial vectors corresponding to the first polarization direction of the second transmission layer and corresponding to the first polarization direction of the third transmission layer, the spatial vectors in the fourth set of spatial vectors include spatial vectors corresponding to the second polarization direction of the second transmission layer and corresponding to the second polarization direction of the third transmission layer, the first indication information further includes information corresponding to the spatial information in the third set and corresponding to the fourth set of spatial vectors, the bit number of the first indication information carrying the information corresponding to the third space vector set is larger than the bit number of the first indication information carrying the information corresponding to the fourth space vector set and smaller than the bit number of the first indication information carrying the information corresponding to the first space vector set.

50. The method as claimed in claim 43, wherein the reference amplitude value corresponding to the first polarization direction of the first transmission layer is larger than the reference amplitude value corresponding to the second polarization direction of the first transmission layer, and the reference amplitude value corresponding to the first polarization direction of the second transmission layer is larger than the reference amplitude value corresponding to the second polarization direction of the second transmission layer.

51. The method of claim 39, wherein the reference amplitude value corresponding to the first polarization direction of the third transmission layer is larger than the reference amplitude value corresponding to the second polarization direction of the third transmission layer.

52. The method as claimed in claim 45, wherein the reference amplitude value corresponding to the first polarization direction of the fourth transmission layer is larger than the reference amplitude value corresponding to the second polarization direction of the fourth transmission layer.

53. The method of claim 43, wherein the frequency domain vectors in the second set of frequency domain vectors corresponding to the first transmission layer are determined from frequency domain vectors in the first set of frequency domain vectors corresponding to the first transmission layer, and wherein the frequency domain vectors in the second set of frequency domain vectors corresponding to the second transmission layer are determined from frequency domain vectors in the first set of frequency domain vectors corresponding to the second transmission layer.

54. The method of claim 46 wherein the N sets of spatial vectors further comprise a third set of frequency domain vectors corresponding to the third set of spatial vectors and a fourth set of frequency domain vectors corresponding to the fourth set of spatial vectors, wherein the frequency domain vectors in the fourth set of frequency domain vectors corresponding to the third transmission layer are determined from the frequency domain vectors in the third set of frequency domain vectors corresponding to the third transmission layer, and wherein the frequency domain vectors in the fourth set of frequency domain vectors corresponding to the fourth transmission layer are determined from the frequency domain vectors in the third set of frequency domain vectors corresponding to the fourth transmission layer.

55. An apparatus for indicating a precoding vector, comprising:

a processing module, configured to generate first indication information, where the first indication information is used to indicate P frequency domain vectors and K space-frequency merging coefficients, where the P frequency domain vectors belong to N frequency domain vector sets, the K space-frequency merging coefficients belong to N space-frequency merging coefficient sets, the N frequency domain vector sets correspond to the N space vector sets one to one, the N space-frequency merging coefficient sets correspond to the N space vector sets one to one, the N space vector sets at least include a first space vector set and a second space vector set, at least one space vector set of the N space vector sets corresponds to at least two transmission layers, N, P, K is greater than or equal to 2, the first indication information includes information corresponding to the first space vector set and information corresponding to the second space vector set, and the number of bits for carrying information corresponding to the first space vector set in the first indication information is greater than that for carrying the second space vector set The number of bits of the corresponding information;

And the transceiver module is used for transmitting the first indication information.

56. The apparatus as recited in claim 55 wherein said set of N frequency domain vectors comprises a first set of frequency domain vectors and a second set of frequency domain vectors, said P frequency domain vectors comprising P of said first set of frequency domain vectors₁A frequency domain vector and P in the second set of frequency domain vectors₂A plurality of frequency domain vectors, the first set of frequency domain vectors corresponding to the first set of spatial vectors, the second set of frequency domain vectors corresponding to the second set of spatial vectors, P₁Greater than P₂And P is₂Greater than or equal to 1.

57. The apparatus according to claim 55 or 56, wherein the N sets of space-frequency combining coefficients comprise a first set of space-frequency combining coefficients and a second set of space-frequency combining coefficients, the first set of space-frequency combining coefficients corresponds to the first set of spatial vectors, the second set of space-frequency combining coefficients corresponds to the second set of spatial vectors, and the number of quantization bits of each space-frequency combining coefficient in the first set of space-frequency combining coefficients is greater than the number of quantization bits of each space-frequency combining coefficient in the second set of space-frequency combining coefficients.

58. The apparatus according to claim 57, wherein the quantization bits for each space-frequency combining coefficient in the first set of space-frequency combining coefficients comprise at least one of amplitude quantization bits and phase quantization bits;

59. The apparatus of claim 56, wherein the first indication information is further configured to indicate Q spatial vectors, Q being greater than or equal to 2, the Q spatial vectors comprising Q in the first set of spatial vectors₁A spatial vector and Q in the second set of spatial vectors₂A spatial domain vector of the spatial domain vector,

60. The apparatus of claim 57, wherein the transceiver module is further configured to: receiving second indication information, wherein the second indication information is used for indicating at least one of the following items:

61. The apparatus according to claim 60, wherein the number of space-frequency combining coefficients in the first set of space-frequency combining coefficients is greater than the number of space-frequency combining coefficients in the second set of space-frequency combining coefficients.

62. The apparatus of claim 55 or 56, wherein Q in the first set of spatial vectors₁Each space vector comprises a partial vector corresponding to a first transmission layer and a partial vector corresponding to a second transmission layer, and Q in the second space vector set₂The spatial vectors include a partial vector corresponding to the first transmission layer and a partial vector corresponding to the second transmission layer.

63. The apparatus according to claim 62, wherein a value of N is 3, the N sets of spatial vectors further include a third set of spatial vectors, the spatial vectors in the third set of spatial vectors include all vectors corresponding to a third transmission layer, the first indication information further includes information corresponding to the third set of spatial vectors, and a number of bits carrying the information corresponding to the third set of spatial vectors in the first indication information is smaller than a number of bits carrying the information corresponding to the first set of spatial vectors.

64. The apparatus according to claim 62, wherein a value of N is 3, the N sets of spatial vectors further include a third set of spatial vectors, the spatial vectors in the third set of spatial vectors include all vectors corresponding to a third transmission layer and all vectors corresponding to a fourth transmission layer, the first indication information further includes information corresponding to the third set of spatial vectors, and a number of bits carrying the information corresponding to the third set of spatial vectors in the first indication information is smaller than a number of bits carrying the information corresponding to the first set of spatial vectors.

65. The apparatus of claim 62, wherein N is 4, wherein the N sets of spatial vectors further comprise a third set of spatial vectors and a fourth set of spatial vectors, the spatial vectors in the third set of spatial vectors comprise a portion of vectors corresponding to a third transmission layer and a portion of vectors corresponding to a fourth transmission layer, the spatial vectors in the fourth set of spatial vectors include a portion vector corresponding to the third transmission layer and a portion vector corresponding to the fourth transmission layer, the first indication information further includes information corresponding to the third set of spatial vectors and information corresponding to the fourth set of spatial vectors, the bit number of the first indication information carrying the information corresponding to the third space vector set is larger than the bit number of the first indication information carrying the information corresponding to the fourth space vector set and smaller than the bit number of the first indication information carrying the information corresponding to the first space vector set.

66. The apparatus of claim 55 or 56, wherein N is 3, the N spatial vector sets further comprise a third spatial vector set, the spatial vectors in the first spatial vector set comprise partial vectors corresponding to the first transmission layer and the second transmission layer, the spatial vectors in the second set of spatial vectors include a portion of vectors corresponding to the first transmission layer, a portion of vectors corresponding to the second transmission layer, and a portion of vectors corresponding to a third transmission layer, the spatial vectors in the third set of spatial vectors comprise a portion of the vectors corresponding to the third transmission layer, the first indication information further includes information corresponding to the third space vector set, and the number of bits carrying the information corresponding to the third space vector set in the first indication information is smaller than the number of bits carrying the information corresponding to the first space vector set.

67. The apparatus according to claim 55 or 56, wherein the sum of the number of spatial vectors in the N sets of spatial vectors is equal to the sum of the number of spatial vectors for all transmission layers.

68. The apparatus according to claim 62, wherein a sum of squared amplitudes of the space-frequency combining coefficients corresponding to each transport layer in the first set of space-frequency combining coefficients is greater than or equal to a sum of squared amplitudes of the space-frequency combining coefficients corresponding to the transport layer in the second set of space-frequency combining coefficients, or wherein a minimum value of the amplitude values corresponding to the space-frequency combining coefficients corresponding to each transport layer in the first set of space-frequency combining coefficients is greater than or equal to a maximum value of the amplitude values of the space-frequency combining coefficients corresponding to the transport layer in the second set of space-frequency combining coefficients, or wherein a minimum value of the wideband amplitude values corresponding to the space-frequency combining coefficients corresponding to each transport layer in the first set of space-frequency combining coefficients is greater than or equal to a maximum value of the wideband amplitude values of the space-frequency combining coefficients corresponding to the transport layer in the second set of space-frequency combining coefficients.

69. The apparatus of claim 65, wherein the N sets of space-frequency combining coefficients further comprise a third set of space-frequency combining coefficients and a fourth set of space-frequency combining coefficients, the third set of space-frequency combining coefficients corresponds to the third set of spatial vectors, the fourth set of space-frequency combining coefficients corresponds to the fourth set of spatial vectors, a sum of squared amplitudes of the space-frequency combining coefficients corresponding to each transmission layer in the third set of space-frequency combining coefficients is greater than or equal to a sum of squared amplitudes of the space-frequency combining coefficients of the transmission layer in the fourth set of space-frequency combining coefficients, or a minimum value of the amplitude values corresponding to the space-frequency combining coefficients of each transmission layer in the third set of space-frequency combining coefficients is greater than or equal to a maximum value of the amplitude values corresponding to the space-frequency combining coefficients of the transmission layer in the fourth set of space-frequency combining coefficients, or a wide-band amplitude value corresponding to each transmission layer in the third set of space-frequency combining coefficients Is greater than or equal to the maximum value in the wideband amplitude values of the space-frequency combining coefficients of the transport layer in the fourth set of space-frequency combining coefficients.

70. The apparatus of claim 55 or 56, wherein the spatial vectors in the first set of spatial vectors comprise spatial vectors corresponding to a first polarization direction of a first transmission layer and spatial vectors corresponding to a first polarization direction of a second transmission layer, and wherein the spatial vectors in the second set of spatial vectors comprise spatial vectors corresponding to a second polarization direction of the first transmission layer and spatial vectors corresponding to a second polarization direction of the second transmission layer.

71. The apparatus of claim 70, wherein N is 3, wherein the N spatial vector sets further include a third spatial vector set, wherein spatial vectors in the third spatial vector set include spatial vectors corresponding to a first polarization direction of a third transmission layer and spatial vectors corresponding to a second polarization direction of the third transmission layer, wherein the first indication information further includes information corresponding to the third spatial vector set, and a number of bits in the first indication information that carry the information corresponding to the third spatial vector set is smaller than a number of bits that carry the information corresponding to the first spatial vector set.

72. The apparatus of claim 70, wherein a value of N is 3, the N sets of spatial vectors further include a third set of spatial vectors, the spatial vectors in the third set of spatial vectors include a spatial vector corresponding to a first polarization direction of a third transmission layer, a spatial vector corresponding to a second polarization direction of the third transmission layer, a spatial vector corresponding to a first polarization direction of a fourth transmission layer, and a spatial vector corresponding to a second polarization direction of the fourth transmission layer, the first indication information further includes information corresponding to the third set of spatial vectors, and a number of bits carrying the information corresponding to the third set of spatial vectors in the first indication information is smaller than a number of bits carrying the information corresponding to the first set of spatial vectors.

73. The apparatus according to claim 70, wherein N is 4, the N sets of spatial vectors further comprise a third set of spatial vectors and a fourth set of spatial vectors, the spatial vectors in the third set of spatial vectors comprise spatial vectors corresponding to a first polarization direction of a third transmission layer and spatial vectors corresponding to a first polarization direction of a fourth transmission layer, the spatial vectors in the fourth set of spatial vectors comprise spatial vectors corresponding to a second polarization direction of the third transmission layer and spatial vectors corresponding to a second polarization direction of a fourth transmission layer, the first indication information further comprises information corresponding to the third set of spatial vectors and information corresponding to the fourth set of spatial vectors, the first indication information carries information corresponding to the third set of spatial vectors in a larger number of bits than the information corresponding to the fourth set of spatial vectors, and the number of bits is less than the number of bits of the information corresponding to the first space vector set.

74. The apparatus according to claim 55 or 56, wherein N is 3, the N sets of spatial vectors further comprise a third set of spatial vectors, the spatial vectors in the first set of spatial vectors comprise spatial vectors corresponding to a first polarization direction of a first transmission layer and spatial vectors corresponding to a first polarization direction of a second transmission layer, the spatial vectors in the second set of spatial vectors comprise spatial vectors corresponding to a second polarization direction of the first transmission layer, spatial vectors corresponding to a second polarization direction of the second transmission layer and spatial vectors corresponding to a second polarization direction of a third transmission layer, the spatial vectors in the third set of spatial vectors comprise spatial vectors corresponding to a first polarization direction of the third transmission layer, the first indication information further comprises vector information corresponding to the third set of spatial vectors, and the number of bits of the first indication information carrying information corresponding to the third set of spatial vectors is smaller than the number of bits of the first indication information carrying information corresponding to the third set of spatial vectors The number of bits of information corresponding to the set of domain vectors.

75. The apparatus according to claim 55 or 56, wherein N is 3, the N sets of space vectors further include a third set of space vectors, the space vectors in the first set of space vectors include the space vector corresponding to the first polarization direction of the first transmission layer, the space vectors in the second set of space vectors include the space vector corresponding to the second polarization direction of the first transmission layer, the space vectors in the third set of space vectors include the space vector corresponding to the first polarization direction of the second transmission layer, the space vector corresponding to the first polarization direction of the third transmission layer, the space vector corresponding to the second polarization direction of the second transmission layer and the space vector corresponding to the second polarization direction of the third transmission layer, the first indication information further includes information corresponding to the third set of space vectors, and the number of bits of the first indication information carrying the information corresponding to the third set of space vectors is smaller than the number of bits carrying the information corresponding to the third set of space vectors The bit number of the information corresponding to a space vector set.

76. The apparatus according to claim 55 or 56, wherein N is 4, the N sets of spatial vectors further comprise a third set of spatial vectors and a fourth set of spatial vectors, the spatial vectors in the first set of spatial vectors comprise spatial vectors corresponding to a first polarization direction of a first transmission layer, the spatial vectors in the second set of spatial vectors comprise spatial vectors corresponding to a second polarization direction of the first transmission layer, the spatial vectors in the third set of spatial vectors comprise spatial vectors corresponding to a first polarization direction of a second transmission layer and a first polarization direction of a third transmission layer, the spatial vectors in the fourth set of spatial vectors comprise spatial vectors corresponding to a second polarization direction of a second transmission layer and a second polarization direction of a third transmission layer, the first indication information further comprises information corresponding to the spatial vectors in the third set and the fourth set, the bit number of the first indication information carrying the information corresponding to the third space vector set is larger than the bit number of the first indication information carrying the information corresponding to the fourth space vector set and smaller than the bit number of the first indication information carrying the information corresponding to the first space vector set.

77. The apparatus of claim 70, wherein the reference amplitude value corresponding to the first polarization direction of the first transmission layer is larger than the reference amplitude value corresponding to the second polarization direction of the first transmission layer, and wherein the reference amplitude value corresponding to the first polarization direction of the second transmission layer is larger than the reference amplitude value corresponding to the second polarization direction of the second transmission layer.

78. The apparatus of claim 66, wherein the reference amplitude value corresponding to the first polarization direction of the third transmission layer is larger than the reference amplitude value corresponding to the second polarization direction of the third transmission layer.

79. The apparatus of claim 72, wherein the reference amplitude value corresponding to the first polarization direction of the fourth transmission layer is larger than the reference amplitude value corresponding to the second polarization direction of the fourth transmission layer.

80. The apparatus of claim 70, wherein frequency domain vectors in the second set of frequency domain vectors corresponding to the first transmission layer are determined from frequency domain vectors in the first set of frequency domain vectors corresponding to the first transmission layer, and wherein frequency domain vectors in the second set of frequency domain vectors corresponding to the second transmission layer are determined from frequency domain vectors in the first set of frequency domain vectors corresponding to the second transmission layer.

81. The apparatus of claim 73 wherein the set of N spatial vectors further comprises a third set of frequency domain vectors corresponding to the third set of spatial vectors and a fourth set of frequency domain vectors corresponding to the fourth set of spatial vectors, wherein frequency domain vectors in the fourth set of frequency domain vectors corresponding to the third transmission layer are determined from frequency domain vectors in the third set of frequency domain vectors corresponding to the third transmission layer, and wherein frequency domain vectors in the fourth set of frequency domain vectors corresponding to the fourth transmission layer are determined from frequency domain vectors in the third set of frequency domain vectors corresponding to the fourth transmission layer.

82. An apparatus for determining a precoding vector, comprising:

a transceiver module, configured to receive first indication information, where the first indication information is used to indicate P frequency domain vectors and K space-frequency combining coefficients, where the P frequency domain vectors belong to N frequency domain vector sets, the K space-frequency combining coefficients belong to N space-frequency combining coefficient sets, the N frequency domain vector sets correspond to the N space domain vector sets one to one, the N space-frequency combining coefficient sets correspond to the N space domain vector sets one to one, the N space domain vector sets at least include a first space domain vector set and a second space domain vector set, at least one space domain vector set of the N space domain vector sets corresponds to at least two transmission layers, N, P, K is greater than or equal to 2, the first indication information includes information corresponding to the first space domain vector set and information corresponding to the second space domain vector set, and the number of bits for carrying information corresponding to the first space domain vector set in the first indication information is greater than that for carrying the second space domain vector set The number of bits of the corresponding information;

And the processing module is used for determining a precoding vector according to the first indication information.

83. The apparatus as recited in claim 82 wherein said set of N frequency-domain vectors comprises a first set of frequency-domain vectors and a second set of frequency-domain vectors, said P frequency-domain vectors comprising P of said first set of frequency-domain vectors₁A frequency domain vector and P in the second set of frequency domain vectors₂A plurality of frequency domain vectors, the first set of frequency domain vectors corresponding to the first set of spatial vectors, the second set of frequency domain vectors corresponding to the second set of spatial vectors, P₁Greater than P₂And P is₂Greater than or equal to 1.

84. The apparatus according to claim 82 or 83, wherein the N sets of space-frequency combining coefficients comprise a first set of space-frequency combining coefficients and a second set of space-frequency combining coefficients, the first set of space-frequency combining coefficients corresponds to the first set of spatial vectors, the second set of space-frequency combining coefficients corresponds to the second set of spatial vectors, and a number of quantization bits per space-frequency combining coefficient in the first set of space-frequency combining coefficients is greater than a number of quantization bits per space-frequency combining coefficient in the second set of space-frequency combining coefficients.

85. The apparatus according to claim 84, wherein the quantization bits for each space-frequency combining coefficient in the first set of space-frequency combining coefficients comprise at least one of amplitude quantization bits and phase quantization bits;

86. The apparatus of claim 83, wherein the first indication information is further configured to indicate Q spatial vectors, Q being greater than or equal to 2, the Q spatial vectors comprising Q in the first set of spatial vectors₁A spatial vector and Q in the second set of spatial vectors₂A spatial domain vector of the spatial domain vector,

87. The apparatus according to claim 84, wherein the transceiver module is further configured to: sending second indication information, wherein the second indication information is used for indicating at least one of the following items:

88. The apparatus according to claim 87, wherein the number of space-frequency combining coefficients in said first set of space-frequency combining coefficients is larger than the number of space-frequency combining coefficients in said second set of space-frequency combining coefficients.

89. According to the claimsThe apparatus of 82 or 83, wherein L in the first set of spatial vectors₁The space-domain vectors include a partial vector corresponding to a first transmission layer and a partial vector corresponding to a second transmission layer, L in the second set of space-domain vectors₂The spatial vectors include a partial vector corresponding to the first transmission layer and a partial vector corresponding to the second transmission layer.

90. The apparatus according to claim 89, wherein a value of N is 3, the N sets of spatial vectors further include a third set of spatial vectors, the spatial vectors in the third set of spatial vectors include all vectors corresponding to a third transmission layer, the first indication information further includes information corresponding to the third set of spatial vectors, and a number of bits carrying the information corresponding to the third set of spatial vectors in the first indication information is smaller than a number of bits carrying the information corresponding to the first set of spatial vectors.

91. The apparatus according to claim 89, wherein a value of N is 3, the N sets of spatial vectors further include a third set of spatial vectors, the spatial vectors in the third set of spatial vectors include all vectors corresponding to a third transmission layer and all vectors corresponding to a fourth transmission layer, the first indication information further includes information corresponding to the third set of spatial vectors, and a number of bits in the first indication information carrying the information corresponding to the third set of spatial vectors is smaller than a number of bits carrying the information corresponding to the first set of spatial vectors.

92. The apparatus of claim 89 wherein N is 4, wherein the N sets of spatial vectors further comprise a third set of spatial vectors and a fourth set of spatial vectors, the spatial vectors in the third set of spatial vectors comprise a portion of vectors corresponding to a third transmission layer and a portion of vectors corresponding to a fourth transmission layer, the spatial vectors in the fourth set of spatial vectors include a portion vector corresponding to the third transmission layer and a portion vector corresponding to the fourth transmission layer, the first indication information further includes information corresponding to the third set of spatial vectors and information corresponding to the fourth set of spatial vectors, the bit number of the first indication information carrying the information corresponding to the third space vector set is larger than the bit number of the first indication information carrying the information corresponding to the fourth space vector set and smaller than the bit number of the first indication information carrying the information corresponding to the first space vector set.

93. The apparatus of claim 82 or 83, wherein N is 3, the N spatial vector sets further comprise a third spatial vector set, the spatial vectors in the first spatial vector set comprise partial vectors corresponding to the first transmission layer and the second transmission layer, the spatial vectors in the second set of spatial vectors include a portion of vectors corresponding to the first transmission layer, a portion of vectors corresponding to the second transmission layer, and a portion of vectors corresponding to a third transmission layer, the spatial vectors in the third set of spatial vectors comprise a portion of the vectors corresponding to the third transmission layer, the first indication information further includes information corresponding to the third space vector set, and the number of bits carrying the information corresponding to the third space vector set in the first indication information is smaller than the number of bits carrying the information corresponding to the first space vector set.

94. The apparatus of claim 82 or 83, wherein a sum of a number of spatial vectors in the N sets of spatial vectors is equal to a sum of a number of spatial vectors for all transmission layers.

95. The apparatus according to claim 89, wherein a sum of squared amplitudes of the space-frequency combining coefficients corresponding to each transport layer in the first set of space-frequency combining coefficients is greater than or equal to a sum of squared amplitudes of the space-frequency combining coefficients corresponding to the transport layer in the second set of space-frequency combining coefficients, or wherein a minimum value of the amplitude values corresponding to the space-frequency combining coefficients corresponding to each transport layer in the first set of space-frequency combining coefficients is greater than or equal to a maximum value of the amplitude values of the space-frequency combining coefficients corresponding to the transport layer in the second set of space-frequency combining coefficients, or wherein a minimum value of the wideband amplitude values corresponding to the space-frequency combining coefficients corresponding to each transport layer in the first set of space-frequency combining coefficients is greater than or equal to a maximum value of the wideband amplitude values of the space-frequency combining coefficients corresponding to the transport layer in the second set of space-frequency combining coefficients.

96. The apparatus of claim 92, wherein the N sets of space-frequency combining coefficients further comprise a third set of space-frequency combining coefficients and a fourth set of space-frequency combining coefficients, the third set of space-frequency combining coefficients corresponds to the third set of spatial vectors, the fourth set of space-frequency combining coefficients corresponds to the fourth set of spatial vectors, a sum of squared amplitudes of the space-frequency combining coefficients corresponding to each transmission layer in the third set of space-frequency combining coefficients is greater than or equal to a sum of squared amplitudes of the space-frequency combining coefficients of the transmission layer in the fourth set of space-frequency combining coefficients, or a minimum value of the amplitude values corresponding to the space-frequency combining coefficients of each transmission layer pair in the third set of space-frequency combining coefficients is greater than or equal to a maximum value of the amplitude values of the space-frequency combining coefficients of the transmission layer in the fourth set of space-frequency combining coefficients, or a maximum value of the wide-band amplitude values corresponding to the space-frequency combining coefficients of each transmission layer pair in the third set of space-frequency combining coefficients The small value is larger than or equal to the maximum value in the broadband amplitude value of the space-frequency combination coefficient of the transmission layer in the fourth space-frequency combination coefficient set.

97. The apparatus of claim 82 or 83, wherein the spatial vectors in the first set of spatial vectors comprise spatial vectors corresponding to a first polarization direction of a first transmission layer and spatial vectors corresponding to a first polarization direction of a second transmission layer, and wherein the spatial vectors in the second set of spatial vectors comprise spatial vectors corresponding to a second polarization direction of the first transmission layer and spatial vectors corresponding to a second polarization direction of the second transmission layer.

98. The apparatus of claim 97, wherein N is 3, wherein the N spatial vector sets further include a third spatial vector set, wherein spatial vectors in the third spatial vector set include spatial vectors corresponding to a first polarization direction of a third transmission layer and spatial vectors corresponding to a second polarization direction of the third transmission layer, wherein the first indication information further includes information corresponding to the third spatial vector set, and a number of bits in the first indication information that carry the information corresponding to the third spatial vector set is smaller than a number of bits that carry the information corresponding to the first spatial vector set.

99. The apparatus of claim 97, wherein a value of N is 3, the N sets of spatial vectors further include a third set of spatial vectors, the spatial vectors in the third set of spatial vectors include a spatial vector corresponding to a first polarization direction of a third transmission layer, a spatial vector corresponding to a second polarization direction of the third transmission layer, a spatial vector corresponding to a first polarization direction of a fourth transmission layer, and a spatial vector corresponding to a second polarization direction of the fourth transmission layer, the first indication information further includes information corresponding to the third set of spatial vectors, and a number of bits carrying the information corresponding to the third set of spatial vectors in the first indication information is smaller than a number of bits carrying the information corresponding to the first set of spatial vectors.

100. The apparatus of claim 97, wherein N is 4, the N sets of spatial vectors further comprise a third set of spatial vectors and a fourth set of spatial vectors, the spatial vectors in the third set of spatial vectors comprise spatial vectors corresponding to a first polarization direction of a third transmission layer and spatial vectors corresponding to a first polarization direction of a fourth transmission layer, the spatial vectors in the fourth set of spatial vectors comprise spatial vectors corresponding to a second polarization direction of the third transmission layer and spatial vectors corresponding to a second polarization direction of a fourth transmission layer, the first indication information further comprises information corresponding to the third set of spatial vectors and information corresponding to the fourth set of spatial vectors, and the number of bits of the first indication information carrying the information corresponding to the third set of spatial vectors is greater than the number of bits of the first indication information carrying the information corresponding to the fourth set of spatial vectors, and the number of bits is less than the number of bits of the information corresponding to the first space vector set.

101. The apparatus according to claim 82 or 83, wherein the value of N is 3, the N sets of spatial vectors further include a third set of spatial vectors, the spatial vectors in the first set of spatial vectors include spatial vectors corresponding to the first polarization direction of the first transmission layer and spatial vectors corresponding to the first polarization direction of the second transmission layer, the spatial vectors in the second set of spatial vectors include spatial vectors corresponding to the second polarization direction of the first transmission layer, spatial vectors corresponding to the second polarization direction of the second transmission layer and spatial vectors corresponding to the second polarization direction of the third transmission layer, the spatial vectors in the third set of spatial vectors include spatial vectors corresponding to the first polarization direction of the third transmission layer, the first indication information further includes vector information corresponding to the third set of spatial vectors, and the number of bits carrying information corresponding to the third set of spatial vectors in the first indication information is smaller than the number of bits carrying information corresponding to the first set of spatial vectors The number of bits of information corresponding to the set of domain vectors.

102. The apparatus according to claim 82 or 83, wherein the value of N is 3, the N sets of spatial vectors further include a third set of spatial vectors, the spatial vectors in the first set of spatial vectors include spatial vectors corresponding to the first polarization direction of the first transmission layer, the spatial vectors in the second set of spatial vectors include spatial vectors corresponding to the second polarization direction of the first transmission layer, the spatial vectors in the third set of spatial vectors include spatial vectors corresponding to the first polarization direction of the second transmission layer, spatial vectors corresponding to the first polarization direction of the third transmission layer, spatial vectors corresponding to the second polarization direction of the second transmission layer and spatial vectors corresponding to the second polarization direction of the third transmission layer, the first indication information further includes information corresponding to the third set of spatial vectors, and the number of bits carrying the information corresponding to the third set of spatial vectors in the first indication information is smaller than the number of bits carrying the information corresponding to the third set of spatial vectors in the first indication information The bit number of the information corresponding to a space vector set.

103. The apparatus according to claim 82 or 83, wherein N is 4, the N sets of spatial vectors further comprise a third set of spatial vectors and a fourth set of spatial vectors, the spatial vectors in the first set of spatial vectors comprise spatial vectors corresponding to a first polarization direction of a first transmission layer, the spatial vectors in the second set of spatial vectors comprise spatial vectors corresponding to a second polarization direction of the first transmission layer, the spatial vectors in the third set of spatial vectors comprise spatial vectors corresponding to a first polarization direction of a second transmission layer and a first polarization direction of a third transmission layer, the spatial vectors in the fourth set of spatial vectors comprise spatial vectors corresponding to a second polarization direction of a second transmission layer and a second polarization direction of a third transmission layer, the first indication information further comprises information corresponding to the spatial information corresponding to the third set of spatial vectors and the fourth set of spatial vectors, the bit number of the first indication information carrying the information corresponding to the third space vector set is larger than the bit number of the first indication information carrying the information corresponding to the fourth space vector set and smaller than the bit number of the first indication information carrying the information corresponding to the first space vector set.

104. The apparatus of claim 97, wherein the reference amplitude value corresponding to the first polarization direction of the first transmission layer is larger than the reference amplitude value corresponding to the second polarization direction of the first transmission layer, and wherein the reference amplitude value corresponding to the first polarization direction of the second transmission layer is larger than the reference amplitude value corresponding to the second polarization direction of the second transmission layer.

105. The apparatus of claim 93, wherein the reference amplitude value corresponding to the first polarization direction of the third transmission layer is larger than the reference amplitude value corresponding to the second polarization direction of the third transmission layer.

106. The apparatus of claim 99, wherein the reference amplitude value corresponding to the first polarization direction of the fourth transmission layer is larger than the reference amplitude value corresponding to the second polarization direction of the fourth transmission layer.

107. The apparatus of claim 97, wherein frequency domain vectors in the second set of frequency domain vectors corresponding to the first transmission layer are determined from frequency domain vectors in the first set of frequency domain vectors corresponding to the first transmission layer, and wherein frequency domain vectors in the second set of frequency domain vectors corresponding to the second transmission layer are determined from frequency domain vectors in the first set of frequency domain vectors corresponding to the second transmission layer.

108. The apparatus recited in claim 100 wherein the set of N spatial vectors further comprises a third set of frequency domain vectors corresponding to the third set of spatial vectors and a fourth set of frequency domain vectors corresponding to the fourth set of spatial vectors, wherein the frequency domain vectors in the fourth set of frequency domain vectors corresponding to the third transmission layer are determined from the frequency domain vectors in the third set of frequency domain vectors corresponding to the third transmission layer, and wherein the frequency domain vectors in the fourth set of frequency domain vectors corresponding to the fourth transmission layer are determined from the frequency domain vectors in the third set of frequency domain vectors corresponding to the fourth transmission layer.