WO2017121209A1 - Transmitting signal processing method and apparatus - Google Patents

Abstract

Disclosed in an embodiment of the present invention are a transmitting signal processing method and apparatus. A transmitting terminal transmits, to a second receiving terminal, a first precoding weight fed back by a first receiving terminal. The transmitting terminal receives a phase adjustment parameter calculated according to the first precoding weight and a second channel gain coefficient of the second receiving terminal and fed back by the second receiving terminal. The transmitting terminal performs, on the basis of the received phase adjustment information, a phase adjustment on a second precoding weight. The transmitting terminal uses the first precoding weight and the second precoding weight that has undergone the phase adjustment to perform precoding, respectively, on a symbol sent to the first receiving terminal and a symbol sent to the second receiving terminal, and superimposes the symbols to obtain a transmitting signal. In the transmitting signal processing method provided by the embodiment of the present invention, a corresponding phase adjustment is performed on a precoding weight of one receiving terminal according to a precoding weight of another receiving terminal, such that a demodulation constellation diagram of a transmitting signal formed by superimposition is regular at the receiving terminal. Therefore, even if two receiving terminals adopt different precoding weights, the invention ensures that a constellation diagram of a transmitting signal satisfies a gray mapping rule, thereby meeting a transmission performance requirement.

Description

Transmitting signal processing method and device Technical field

Embodiments of the present invention relate to MU-MIMO technology, and in particular, to a method and a device for processing a transmitted signal.

Background technique

Multi-user multi-antenna technology in wireless communication systems is one of the effective techniques to improve system performance. The specific implementation technologies include non-orthogonal multiple access (NOMA) and multi-user multiple input multiple output (MU-MIMO) technologies.

As one of the 5G potential key technologies, NOMA has significant advantages in improving spectrum efficiency. The NOMA principle is: multi-user information superimposition coding is performed on the transmitting side, and the receiving side uses SIC (Successive Interference Cancellation) to eliminate the interference signal. For example, superimposing coding on the transmitting side of a broadcasting system means superimposing information of a plurality of users, where the superposition is usually a direct addition of power domains, and according to a constellation mapping rule of signals after multi-user superposition, The overlay can be divided into two types that satisfy the Gray mapping rule and the Gray mapping rule. The performance of the superimposed signal that satisfies the Gray mapping rule is better than that of the superimposed signal that does not satisfy the Gray mapping rule. In order to ensure that the superimposed signals can satisfy the Gray mapping rule, multiple users are required to use the same precoding weights for encoding. The specific implementation includes:

First, the transmitting end, such as the base station, determines two users according to the feedback information of the precoding indication (PMI, Precoding Matrix Indicator) of the receiving end, and the precoding weights of the two users are the same;

Then, the transmitting end encodes the two-bit stream to obtain a first codeword stream and a second codeword stream, and then combines the two codeword streams to obtain a first symbol sequence and a second symbol sequence, and simultaneously Two symbol sequences for power allocation;

Then, after the first symbol sequence and the second symbol sequence are layer mapped, the same precoding weight is used to process, to obtain a new first symbol sequence and a new second symbol sequence;

Finally, the new first symbol sequence and the second symbol sequence are superposed to obtain a transmission signal, and the constellation of the transmission signal satisfies the Gray mapping rule.

Although the above method can make the constellation of the transmitted signal satisfy the Gray mapping rule and ensure better transmission performance, the precondition of the above method is that multiple users must adopt the same precoding weight. This undoubtedly increases the difficulty of pairing the base station to the user and reduces the probability of pairing.

For the current MU-MIMO technology, it allows multiple users to adopt different precoding weights, so that the precoding weights of the two users determined by the transmitting end according to the received PMI feedback information may be different. Compared with the traditional techniques using the same precoding weights, the current MU-MIMO technology has certain advantages in user scheduling efficiency when the two are different. However, since MU-MIMO uses different precoding weights, there is no guarantee that the constellation of the superimposed signal satisfies the Gray mapping rule, so the transmission performance is degraded.

In order to improve the transmission performance when multiple users adopt different precoding weights, that is, to ensure that the constellation of the transmitted signal meets the Gray mapping rule at this time, the patent provides a corresponding solution to the defects of the related art.

Summary of the invention

Embodiments of the present invention provide a method and an apparatus for processing a transmission signal, which can meet transmission performance requirements.

In order to achieve the object of the present invention, an embodiment of the present invention provides a method for processing a transmit signal, including: transmitting, by a transmitting end, a first pre-encoding weight fed back by a first receiving end to a second receiving end;

The transmitting end receives the phase adjustment parameter calculated from the second receiving end and calculated according to the first precoding weight and the second channel gain coefficient of the second receiving end itself;

The transmitting end performs phase adjustment on the second precoding weight based on the received phase adjustment information;

The transmitting end pre-codes and superimposes the symbols sent to the first receiving end and the symbols of the second receiving end by using the first pre-encoding weight and the phase-adjusted second pre-coding weight respectively. transmit a signal.

Optionally, the method further includes: the transmitting end determining the first receiving end and the second receiving end according to the precoding indication PMI feedback information of the receiving end and the channel quality information that is fed back.

Optionally, the sending, by the first receiving end, the first pre-coding weight to the second receiving end includes:

The first precoding weight is indicated by the index number of the codeword and is sent to the second receiving end;

Or, the first precoding weight is indicated by the pilot and sent to the second receiving end.

Optionally, the number of columns of the first precoding weight is 1.

Optionally, the calculating, by the second receiving end, the phase adjustment information according to the first precoding weight and the channel gain coefficient of the second receiving end includes:

The second receiving end takes a first n column vector of a right singular matrix of its own downlink channel gain coefficient matrix to form a matrix, where n is the number of columns of the second precoding weight; and the formed matrix is reused The conjugate matrix is multiplied by the first precoding weight to obtain a projection vector;

The phase of each row element on the diagonal of the phase parameter matrix G as the phase adjustment information is equal to the phase of the same row element of the obtained projection vector, the phase parameter matrix G is a diagonal matrix, and the diagonal of the phase parameter matrix G The modulus of the online elements is 1.

Optionally, the feeding, by the second receiving end, the phase adjustment information to the transmitting end includes:

The second receiving end quantizes the phase of the element on the diagonal line in the phase parameter matrix G, and feeds back the quantized phase parameter to the transmitting end to indicate a specific phase adjustment parameter; or

The second receiving end determines a reference set of a phase adjustment parameter according to a given codebook set, a number of transmit antennas, and a precoding layer, and finds a diagonal element in the reference set and the phase parameter matrix G. The closest phase parameter codeword of the vector, and feeding back the index number of the phase parameter codeword to the transmitting end to indicate a specific phase adjustment parameter.

Optionally, the phase adjustment of the second precoding weight includes:

And multiplying the second pre-coding weight matrix by the phase parameter matrix.

Optionally, the precoding and superimposing the symbols sent to the first receiving end and the symbols of the second receiving end to obtain the transmitting signal respectively include:

The transmitting end performs a joint mapping and a layer mapping operation on the first bit stream and the second bit stream corresponding to the first receiving end and the second receiving end to obtain a first symbol sequence and a second symbol sequence;

And precoding the obtained first symbol sequence and the second symbol sequence according to the first precoding weight and the phase adjusted second precoding weight respectively, and superimposing the precoded signals to obtain The transmitted signal.

Optionally, the obtaining the first symbol sequence, the second symbol sequence includes:

Performing a bit operation on the first bit stream and the second bit stream to obtain a third bit stream, the first bit stream is modulated to obtain the first symbol sequence, and the third bit stream is modulated to obtain the second bit stream Sequence; or,

The first bit stream is modulated to obtain the first symbol sequence, and the second bit stream is modulated to obtain a reference second symbol sequence, and performing constellation point adjustment on the reference second symbol sequence according to the first symbol sequence to obtain the first Two symbol sequence.

A further embodiment of the present invention provides a method for processing a transmitted signal, comprising: receiving, by a second receiving end, a first precoding weight value fed back from a first receiving end of the transmitting end;

The second receiving end calculates the phase adjustment information according to the first precoding weight and its own channel gain coefficient and feeds back to the transmitting end.

Optionally, the number of columns of the first precoding weight is 1.

Optionally, the calculating, by the second receiving end, the phase adjustment information according to the first precoding weight and the channel gain coefficient of the second receiving end includes:

The second receiving end takes a first n column vector of a right singular matrix of its own downlink channel gain coefficient matrix to form a matrix, where n is the number of columns of the second precoding weight; and the formed matrix is reused The conjugate matrix is multiplied by the first precoding weight to obtain a projection vector;

The phase of each row of elements on the diagonal of the phase parameter matrix G of the phase adjustment information The bit is equal to the phase of the same row element of the obtained projection vector, the phase parameter matrix G is a diagonal matrix, and the modulus of the elements on the diagonal of the phase parameter matrix G is 1.

Optionally, the feeding, by the second receiving end, the phase adjustment information to the transmitting end includes:

The second receiving end quantizes the phase of the element on the diagonal line in the phase parameter matrix G, and feeds back the quantized phase parameter to the transmitting end to indicate a specific phase adjustment parameter; or

The second receiving end determines a reference set of a phase adjustment parameter according to a given codebook set, a number of transmit antennas, and a precoding layer, and finds a diagonal element in the reference set and the phase parameter matrix G. The closest phase parameter codeword of the vector, and feeding back the index number of the phase parameter codeword to the transmitting end to indicate a specific phase adjustment parameter.

The embodiment of the present invention further provides a transmitting end, including a first acquiring unit and a first processing unit, where

a first acquiring unit, receiving a first precoding weight from the first receiving end, a second precoding weight from the second receiving end, and receiving a phase adjusting parameter from the second receiving end;

a first processing unit, configured to send the first precoding weight to the second receiving end; perform phase adjustment on the second precoding weight based on the received phase adjustment information; and use the received first precoding weight And the phase-adjusted second pre-encoding weights respectively pre-code and superimpose the symbols sent to the first receiving end and the symbols of the second receiving end to obtain a transmitting signal.

Optionally, the first acquiring unit is further configured to: determine the first receiving end and the second receiving end according to precoding weight information and channel quality information reported by each user in the cell.

Optionally, the first processing unit is specifically configured to:

The first precoding weight is indicated by the index number of the codeword and is sent to the second receiving end; or the first precoding weight is indicated by the pilot and sent to the second receiving end;

Right multiplying the second precoding weight matrix by the phase parameter matrix of the phase adjustment information;

And performing a joint mapping and a layer mapping operation on the first bit stream and the second bit stream corresponding to the first receiving end and the second receiving end to obtain a first symbol sequence and a second symbol sequence; according to the first pre- Encoding weight and the second precoding weight after the phase adjustment are respectively obtained The first symbol sequence and the second symbol sequence are precoded, and the precoded signals are superimposed to obtain the transmitted signal.

Optionally, the obtaining the first symbol sequence, the second symbol sequence includes:

Performing a bit operation on the first bit stream and the second bit stream to obtain a third bit stream, the first bit stream is modulated to obtain the first symbol sequence, and the third bit stream is modulated to obtain the second bit stream Sequence; or,

The first bit stream is modulated to obtain the first symbol sequence, and the second bit stream is modulated to obtain a reference second symbol sequence, and performing constellation point adjustment on the reference second symbol sequence according to the first symbol sequence to obtain the first Two symbol sequence.

The embodiment of the present invention further provides a receiving end, including a second processing unit and a second acquiring unit, where

a second acquiring unit, receiving a first precoding weight from the transmitting end;

The second processing unit calculates phase adjustment information according to the received first precoding weight and its own channel gain coefficient; and feeds back the calculated phase adjustment information to the transmitting end.

Optionally, the second processing unit includes: a first computing module, a second computing module, where

The first calculation module is configured to form a matrix by using the first n column vectors of the right singular matrix of the downlink channel gain coefficient matrix of the downlink; wherein n is the number of columns of the second precoding weight;

The second calculation module is configured to: multiply the transposed conjugate matrix of the matrix calculated by the first calculation module by the first pre-encoding weight to obtain a projection vector; as the phase parameter matrix G of the phase adjustment information The phase of each row element on the diagonal is equal to the phase of the same row element of the obtained projection vector, the phase parameter matrix G is a diagonal matrix, and the modulus of the elements on the diagonal of the phase parameter matrix G is 1.

In the embodiment of the present invention, a computer storage medium is further provided, and the computer storage medium may store an execution instruction for executing the transmission signal processing method in the above embodiment.

Compared with the related art, the technical solution of the present application includes: the transmitting end sends the first precoding weight value fed back by the first receiving end to the second receiving end; and the transmitting end receives the first precoding according to the feedback from the second receiving end. a phase adjustment parameter calculated by the weight and the second channel gain coefficient of the second receiving end; the transmitting end performs phase adjustment on the second precoding weight based on the received phase adjustment information; and the transmitting end uses the first precoding weight And the phase-adjusted second pre-encoding weights respectively pre-code and superimpose the symbols sent to the first receiving end and the symbols of the second receiving end to obtain a transmitting signal. The method for processing a transmitted signal provided by the present invention performs a corresponding phase adjustment on a precoding weight of another receiving end according to a precoding weight of one of the receiving ends, so that the demodulated constellation of the superimposed transmitted signal at the receiving end is regular. In this way, even if the two receiving ends adopt different precoding weights, the constellation of the transmitted signal can be guaranteed to meet the Gray mapping rule, thereby satisfying the transmission performance requirement.

Other features and advantages of the invention will be set forth in the description which follows, The objectives and other advantages of the invention may be realized and obtained by means of the structure particularly pointed in the appended claims.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flow chart of a method for processing a transmitted signal according to the present invention;

2 is a beam diagram of a pre-coded remote user and a near user;

3 is a constellation diagram of a superimposed signal without phase adjustment in a multi-antenna system;

4 is a constellation diagram of a phase-adjusted superimposed signal in a multi-antenna system;

Figure 5 is a schematic structural view of a transmitting end of the present invention;

6 is a schematic structural diagram of a receiving end of the present invention;

FIG. 7 is a schematic diagram of a processing procedure of a transmitting end according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic diagram of a process of a first embodiment of a joint mapping process according to the present invention; FIG.

FIG. 9 is a schematic diagram of a process of a second embodiment of the joint mapping process of the present invention.

detailed description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

1 is a flowchart of a method for processing a transmitted signal according to the present invention. The transmitting end, for example, the base station determines two users according to the PMI feedback information of the receiving end, such as the terminal, and the channel quality information that is fed back, that is, the first receiving end (ie, the far user) and the first Two receiving ends (ie, near users); as shown in FIG. 1, the method of the present invention includes:

Step 100: The transmitting end sends the first precoding weight value fed back by the first receiving end to the second receiving end.

In this step, the transmitting end may indicate the first precoding weight through the index number of the codeword; or indicate the first precoding weight through the pilot.

Optionally, the number of columns of the first precoding weight is 1.

Step 101: The transmitting end receives the phase adjustment parameter calculated from the second receiving end and calculated according to the first precoding weight and the second channel gain coefficient of the second receiving end itself.

In this step, the second receiving end calculates the phase adjustment information according to the first precoding weight and the channel gain coefficient of the second receiving end, including:

The second receiving end takes the first n column vector of the right singular matrix of its own downlink channel gain coefficient matrix to form a matrix, and n is the number of columns of the second precoding weight; and multiplies the transposed conjugate matrix of the formed matrix by First precoding weight, obtaining a projection vector;

The phase of each row element on the diagonal of the phase parameter matrix G is equal to the phase of the same row element of the obtained projection vector, the phase parameter matrix G is a diagonal matrix, and the modes of the elements on the diagonal of the phase parameter matrix G are 1. The phase parameter matrix is the phase adjustment information in this step.

In this step, the manner in which the second receiving end feeds back the phase adjustment information to the transmitting end may include:

The second receiving end quantizes the phase of the elements on the diagonal in the phase parameter matrix G and feeds back the quantized phase parameters to the transmitting end to indicate the specific phase adjustment parameters. or,

The second receiving end may determine a reference set of a phase adjustment parameter according to a given codebook set, a number of transmit antennas, and a precoding layer, and the second receiving end searches for a phase parameter matrix G diagonal element in the reference set. The formed vector has the closest phase parameter codeword, and feeds back the index number of the phase parameter codeword to the transmitting end to indicate a specific phase adjustment parameter.

Here, two methods which are most commonly used to judge the proximity of two vectors can be used: assuming vector A: a vector representing a G diagonal element; and a vector B: a vector representing a reference set of phase adjustment parameters.

When the value of the minimum mean square error of the vector B in the vector A and the reference set is the smallest, the vector A and the vector B are the closest; or

When the vector A is different from the vector B in the reference set and takes an absolute value, a difference vector is obtained, and the maximum value of the elements in the difference vector is the minimum value of the maximum value of the difference vector obtained by the vector A and other vectors in the reference set. When vector A is closest to vector B. Expressed by the formula: argmin-[max(A-reference set)].

Step 102: The transmitting end performs phase adjustment on the second precoding weight based on the received phase adjustment information. include:

The second precoding weight matrix is right-multiplied by a phase parameter matrix.

Step 103: The transmitting end pre-codes and superimposes the symbols sent to the first receiving end and the symbols of the second receiving end by using the first pre-encoding weight and the phase-adjusted second pre-encoding weight to obtain a transmitting signal. Specifically include:

The transmitting end performs a joint mapping and a layer mapping operation on the first bit stream and the second bit stream corresponding to the first receiving end and the second receiving end to obtain a first symbol sequence and a second symbol sequence;

The obtained first symbol sequence and the second symbol sequence are precoded according to the first precoding weight and the phase adjusted second precoding weight respectively, and the precoded signals are superimposed to obtain a transmission signal.

Wherein, since the second pre-encoding weight is phase-adjusted according to the first pre-encoding weight, the symbol obtained by linearly superimposing the symbol in the first symbol sequence of the two users and the symbol in the second symbol sequence The constellation diagram satisfies the Gray mapping.

In this step, the first symbol sequence can be obtained in the following manner: the second symbol sequence:

The first bit stream and the second bit stream are bit-operated (eg, XOR, same or) to obtain a third bit stream, the first bit stream is modulated to obtain a first symbol sequence, and the third bit stream is modulated to obtain a second symbol sequence; or,

The first bit stream is modulated to obtain a first symbol sequence, and the second bit stream is modulated to obtain a reference second symbol sequence, and the reference second symbol sequence is constrained according to the first symbol sequence to obtain a second symbol sequence.

It is assumed that the first receiving end corresponds to the far user, and the second receiving end corresponds to the near user. FIG. 2 is a pre-coded beam pattern of the far user and the near user. As shown in FIG. 2, the precoding weight T _F is a pre-user of the far user. The coding weight, the precoding weight T _N is the initial precoding weight of the near user. If the phase adjustment of the precoding weight of one of the users is not performed, the constellation diagram of the multi-user superimposed signal is as shown in FIG. 3, which is obviously unconventional, which is not conducive to the implementation of the Gray mapping rule. However, if the precoding weight of one of the users is phase-adjusted according to the above-described method for transmitting signal processing according to the present invention, then the constellation of the signal after the multi-user superposition is shown in FIG. 4, which is regular and advantageous for mapping. The implementation of the rules.

The method for processing a transmitted signal provided by the present invention performs a corresponding phase adjustment on a precoding weight of one of the receiving ends, so that the demodulated constellation of the superimposed transmitted signal at the receiving end is regular. In this way, even if the two receiving ends adopt different precoding weights, the constellation of the transmitted signal can be guaranteed to meet the Gray mapping rule, thereby satisfying the transmission performance requirement.

The invention also provides a method for processing a transmitted signal, comprising:

The second receiving end receives the first precoding weight value fed back from the first receiving end of the transmitting end;

The second receiving end calculates the phase adjustment information according to the first precoding weight and its own channel gain coefficient and feeds back to the transmitting end.

Optionally, the number of columns of the first precoding weight is 1.

The calculating, by the second receiving end, the phase adjustment information according to the first precoding weight and the channel gain coefficient of the second receiving end includes:

The second receiving end takes a matrix of the first n columns of the right singular matrix of its own downlink channel gain coefficient matrix to form a matrix, where n is the number of columns of the second precoding weight; and the transposed conjugate matrix of the formed matrix is reused Multiplying the first precoding weight to obtain a projection vector;

The phase of each row element on the diagonal of the phase parameter matrix G is equal to the phase of the same row element of the obtained projection vector, the phase parameter matrix G is a diagonal matrix, and the modes of the elements on the diagonal of the phase parameter matrix G are 1. The phase parameter matrix is the phase adjustment information in this step.

The manner in which the second receiving end feeds back the phase adjustment information to the transmitting end may include:

The second receiving end quantizes the phase of the elements on the diagonal in the phase parameter matrix G and feeds back the quantized phase parameters to the transmitting end to indicate the specific phase adjustment parameters. or,

The second receiving end may determine a reference set of phase adjustment parameters according to a given codebook set, the number of transmit antennas, and the number of precoding layers, and find a vector formed by the diagonal element of the phase parameter matrix G in the reference set. A similar phase parameter codeword, and feeding back the index number of the phase parameter codeword to the transmitting end to indicate a specific phase adjustment parameter. 5 is a schematic structural diagram of a transmitting end of the present invention, as shown in FIG. 5, including a first acquiring unit and a first processing unit, where

a first acquiring unit, receiving a first precoding weight from the first receiving end, a second precoding weight from the second receiving end, and receiving a phase adjusting parameter from the second receiving end;

a first processing unit, configured to send the first precoding weight to the second receiving end; perform phase adjustment on the second precoding weight based on the received phase adjustment information; and use the received first precoding weight And the phase-adjusted second pre-encoding weights respectively pre-code and superimpose the symbols sent to the first receiving end and the symbols of the second receiving end to obtain a transmitting signal.

The first acquiring unit is further configured to: determine the first receiving end and the second receiving end according to the precoding weight information and the channel quality information reported by each user in the cell.

The first processing unit is further configured to: emit the superimposed transmitted signal.

In the present invention, the first processing unit is specifically configured to:

The first precoding weight is indicated by the index number of the codeword and is sent to the second receiving end; or the first precoding weight is indicated by the pilot and sent to the second receiving end; The second precoding weight matrix is right-multiplied as a phase parameter matrix of the phase adjustment information;

Performing joint mapping and layer mapping operations on the first bit stream and the second bit stream corresponding to the first receiving end and the second receiving end to obtain a first symbol sequence and a second symbol sequence; adjusting according to the first precoding weight and phase The second pre-encoding weights respectively pre-code the obtained first symbol sequence and the second symbol sequence, and superimpose the pre-encoded signals to obtain a transmission signal.

Wherein, the first symbol sequence can be obtained in the following manner: the second symbol sequence:

The first bit stream and the second bit stream are bit-operated (eg, XOR, same or) to obtain a third bit stream, the first bit stream is modulated to obtain a first symbol sequence, and the third bit stream is modulated to obtain a second symbol sequence; or,

The first bit stream is modulated to obtain a first symbol sequence, and the second bit stream is modulated to obtain a reference second symbol sequence, and the reference second symbol sequence is constrained according to the first symbol sequence to obtain a second symbol sequence.

FIG. 6 is a schematic structural diagram of a receiving end of the present invention. As shown in FIG. 6, the method includes at least a second processing unit and a second acquiring unit, where

a second acquiring unit, receiving a first precoding weight from the transmitting end;

The second processing unit calculates phase adjustment information according to the received first precoding weight and its own channel gain coefficient; and feeds back the calculated phase adjustment information to the transmitting end.

further,

The second processing unit is further configured to receive a transmit signal from the transmit end.

Specifically, the second processing unit includes: a first computing module, a second computing module, where

The first calculation module is configured to form a matrix by using the first n column vectors of the right singular matrix of the downlink channel gain coefficient matrix of the own, where n is the number of layers of the second precoding weight;

The second calculation module is configured to: multiply the transposed conjugate matrix of the matrix calculated by the first calculation module by the first pre-encoding weight to obtain a projection vector; diagonal lines of the phase parameter matrix G The phase of each row element is equal to the phase of the same row element of the obtained projection vector, the phase parameter matrix G is a diagonal matrix, and the modulus of the elements on the diagonal of the phase parameter matrix G is 1. The phase parameter matrix is the phase adjustment information in this step.

The second obtaining unit in the receiving end of the present invention may also be configured to: feed back its first precoding weight to the transmitting end.

It should be noted that the receiving end in the present invention may also include only the same function as the related receiving end, that is, the precoding right value of the present invention is fed back to the transmitting end to receive the transmitting signal from the transmitting end.

The method of the present invention will be described in detail below with reference to specific embodiments.

FIG. 7 is a schematic diagram of a processing procedure of a transmitting end according to the present invention. As shown in FIG. 7 , in the embodiment of the present invention, the lower branch is a near user and corresponds to a second receiving end; the upper branch is a remote user, corresponding to the first receiving end. First, the two bit stream, that is, the second bit stream A _N , the first bit stream A _F is modulated into a complex symbol sequence having a certain power, that is, the second complex symbol sequence _CN and the first complex symbol sequence C _F ; The mapping obtains the second symbol sequence SN and the first symbol sequence SF respectively, and then pre-encodes the two signals respectively, wherein the pre-coding weight corresponding to the second receiving end of the near user is a pre-encoding weight that has undergone phase adjustment; Finally, the precoded signals are superimposed to obtain a transmitted signal S.

First embodiment

Assume that the number of antenna ports on the transmitting end is 2, the number of antenna ports on the receiving end is M, and one layer is used for mapping at the far user layer, and one layer is used for mapping near the user layer, where 1 ≤ l ≤ M, 1 ≤ M ≤ 2 . The specific implementation is described as follows:

First, each user in the cell sends its own PMI and Channel Quality Indicator (CQI) to the base station, and the base station determines the first receiving end and the second receiving end according to the information provided by the user, and the channel quality of the second receiving end is better. At the first receiving end. Here, the first receiving end represents a far user, and the second receiving end represents a near user. The base station then sends the first precoding weight information of the far user to the second receiving end corresponding to the near user, and the first precoding weight of the far user is represented as T _F , where T _F =[P _{F_1} ]. P _{F_1} is the unique column vector of T _F .

Then, the near-user performs singular value decomposition (SVD, Singular Value Decomposition) processing on the measured downlink channel gain coefficient matrix to obtain a right singular matrix V of the near-user channel gain coefficient matrix H. V(:, 1:1) is the initial second precoding weight of the near user, ie. Here, the vector of the first column is the matrix formed by the vector of the first column of the matrix V. l is the number of layers.

Then, the near user calculates the phase parameter matrix G according to the first user's first pre-encoding weights T _F and V(:, 1:1), and G is a diagonal matrix whose expression is as shown in formula (1). :

V(:,1:l) ^H is a conjugate transpose matrix of V(:,1:l), and V(:,1:l) ^H T _{F is} calculated as shown in equation (2):

In the formulas (1) and (2), β _i = θ _i , 1 ≤ _i ≤ 1, that is, the element value on the diagonal of the rotation matrix G can be determined according to V(:, 1: 1) ^H T _F .

Next, the near user needs to feed back the phase adjustment parameters to the base station. Here is an implementation:

The near user quantizes the phase of the elements on the diagonal in the phase parameter matrix G and feeds back the quantized phase parameters to the base station. The quantization method is to quantize β _i in [α, α + 2π), and K bits can be used to represent the overhead of the quantization information, and the quantization candidate has 2 ^K ; α is any real number. K is a natural number.

Thereafter, the base station performs phase adjustment on the initial second precoding weight T _N of the near user according to the phase parameter matrix G, and obtains a new second precoding weight T′ _N =T _N G of the near user. Here, T _N is a matrix whose behavior 2 is l.

Finally, the base station pre-codes the first symbol sequence and the second symbol sequence according to the first pre-coding weight and the new second pre-coding weight, and then performs superposition to obtain the superposed transmission signal.

At the transmitting end of the base station, the source 0 and 1 bit streams are respectively turbo encoded to obtain the second bit stream A _N and the first bit stream A _F . Then, the two codeword streams are subjected to joint mapping processing to generate a second complex symbol sequence C _N and a first complex symbol sequence C _{F of the} modulated signal, where the joint mapping process can be implemented by the following method:

FIG. 8 is a schematic diagram of an implementation process of the joint mapping process of the present invention. As shown in FIG. 8, the second bit stream A _N of the near user is first bit-operated with the first bit stream A _F modulation bit of the far user, such as XOR. The operation or the same operation, and then the first bit stream and the bit-processed second bit stream are separately modulated and power allocated. Among them, the operator is the same or operator or XOR operator.

Thus, the layer-mapped second symbol sequence S _N and the first symbol sequence S _F are separately precoded based on the second user's second precoding weight T′ _N and the far user's first precoding weight T _F . And superimposed, the superimposed transmitted signal S is obtained. The transmitting end transmits a transmitting signal S.

For example, suppose the number of antenna ports on the transmitting end is 4, the number of antenna ports on the receiving end is M, and 1 layer is used for mapping of the far-end user layer, and 1 layer is used for mapping near the user layer. In the above embodiment, 1 ≤ l ≤ M, 1 ≤ M ≤ 4, other implementations are the same, and will not be described here.

For example, it is assumed that the number of antenna ports at the transmitting end is 8, the number of antenna ports at the receiving end is M, and one layer is used for mapping of the far user layer, and one layer is used for mapping near the user layer. In the above embodiment, 1 ≤ l ≤ M, 1 ≤ M ≤ 8, other implementations are the same, and will not be described here.

Second embodiment

Assume that the number of antenna ports on the transmitting end is 2, the number of antenna ports on the receiving end is M, and one layer is used for mapping at the far user layer, and one layer is used for mapping near the user layer, where 1 ≤ l ≤ M, 1 ≤ M ≤ 2 .

The specific implementation is described as follows:

First, each user in the cell sends its own PMI and Channel Quality Indicator (CQI) to the base station, and the base station determines the first receiving end and the second receiving end according to the information provided by the user, and the channel quality of the second receiving end is better. At the first receiving end. Here, the first receiving end represents a far user, and the second receiving end represents a near user. The base station then sends the first precoding weight information of the far user to the second receiving end corresponding to the near user, and the first precoding weight of the far user is represented as T _F , where T _F =[P _{F_1} ]. P _{F_1} is the unique column vector of T _F .

Then, the near-user performs singular value decomposition (SVD, Singular Value Decomposition) processing on the measured downlink channel gain coefficient matrix to obtain a right singular matrix V of the near-user channel gain coefficient matrix H, and then takes the front of the right singular matrix. The matrix V(:, 1:1) formed by the column vectors. l is the number of layers.

Then, the near user calculates the phase parameter matrix G according to the first pre-encoding weights T _F and V(:, 1:1) of the far user, and G is a diagonal matrix, and the expression is still as shown in the formula (1).

Yes, the conjugate transposed matrix, according to the formula, in the second embodiment, it is assumed that the precoding weights of the far user and the near user are taken from the codebook set, so that the given codebook set, the number of transmitting antennas, and The number of precoding layers determines a reference set of phase adjustment parameters. The near user looks for a phase parameter codeword that is closest to the vector formed by the diagonal element of the phase parameter matrix G in the reference set. The near user feeds back the index number of the phase parameter codeword to the base station.

Thereafter, the base station performs phase adjustment on the initial second precoding weight T _N of the near user according to the phase parameter matrix G, and obtains a new second precoding weight T′ _N =T _N G of the near user. Here, T _N is a matrix whose behavior 2 is l.

Finally, the base station pre-codes the first symbol sequence and the second symbol sequence according to the first pre-coding weight and the new second pre-coding weight, and then performs superposition to obtain the superposed transmission signal.

At the transmitting end of the base station, the source 0 and 1 bit streams are respectively turbo encoded to obtain the second bit stream A _N and the first bit stream A _F . Then, the two codeword streams are subjected to joint mapping processing to generate a second complex symbol sequence C _N and a first complex symbol sequence C _{F of the} modulated signal, where the joint mapping process can be implemented by the following method:

9 is a schematic diagram of a second implementation process of the joint mapping process of the present invention. As shown in FIG. 9, the modulation and power allocation are performed on the far-end user and the near-user, and the second modulation signal E _{F of the} near-user, ie, the second receiving end, is obtained. The far user is the first modulated signal E _{N of the} first receiving end, and then the second modulated signal E _N is mirrored. The mirroring operation formula is:

Among them, the operator imag() represents the imaginary part of the complex number, and the operator real() represents the real part of the complex number.

Thus, the layer-mapped second symbol sequence S _N and the first symbol sequence S _F are separately precoded based on the second user's second precoding weight T′ _N and the far user's first precoding weight T _F . And superimposed, the superimposed transmitted signal S is obtained. The transmitting end transmits a transmitting signal S.

For example, suppose the number of antenna ports on the transmitting end is 4, the number of antenna ports on the receiving end is M, and 1 layer is used for mapping of the far-end user layer, and 1 layer is used for mapping near the user layer. In the above embodiment, 1 ≤ l ≤ M, 1 ≤ M ≤ 4, other implementations are the same, and will not be described here.

For example, it is assumed that the number of antenna ports at the transmitting end is 8, the number of antenna ports at the receiving end is M, and one layer is used for mapping of the far user layer, and one layer is used for mapping near the user layer. In the above embodiment, 1 ≤ l ≤ M, 1 ≤ M ≤ 8, other implementations are the same, and will not be described here.

Third embodiment

Assume that the number of antenna ports on the transmitting end is 2, the number of antenna ports on the receiving end is M, and one layer is used for mapping at the far user layer, and one layer is used for mapping near the user layer, where 1 ≤ l ≤ M, 1 ≤ M ≤ 2 .

The specific implementation is described as follows:

First, each user in the cell sends its own PMI and Channel Quality Indicator (CQI) to the base station, and the base station determines the first receiving end and the second receiving end according to the information provided by the user, and the channel quality of the second receiving end is better. At the first receiving end. Here, the first receiving end represents a far user, and the second receiving end represents a near user. The base station then sends the first precoding weight information of the far user to the second receiving end corresponding to the near user, and the first precoding weight of the far user is represented as T _F , where T _F =[P _{F_1} ]. P _{F_1} is the unique column vector of T _F .

Then, the near-user performs singular value decomposition (SVD, Singular Value Decomposition) processing on the measured downlink channel gain coefficient matrix to obtain a right singular matrix V of the near-user channel gain coefficient matrix H, and then takes the front of the right singular matrix. The matrix V(:, 1:1) formed by the column vectors. l is the number of layers.

Then, the near user calculates the phase parameter matrix G according to the first pre-encoding weights T _F and V(:, 1:1) of the far user, and G is a diagonal matrix whose expression is still as in formula (1).

Next, the near user needs to feed back the phase adjustment parameters to the base station. Here is an implementation:

The near user quantizes the phase of the elements on the diagonal in the phase parameter matrix G and feeds back the quantized phase parameters to the base station. The quantization method is to quantize β _i in [α, α + 2π), and K bits can be used to represent the overhead of the quantization information, and the quantization candidate has 2 ^K ; α is any real number. K is a natural number.

Thereafter, the base station performs phase adjustment on the initial second precoding weight T _N of the near user according to the phase parameter matrix G, and obtains a new second precoding weight T′ _N =T _N G of the near user. Here, T _N is a matrix whose behavior 2 is l.

Finally, the base station pre-codes the first symbol sequence and the second symbol sequence according to the first pre-coding weight and the new second pre-coding weight, and then performs superposition to obtain the superposed transmission signal.

At the transmitting end of the base station, the source 0 and 1 bit streams are respectively turbo encoded to obtain the second bit stream A _N and the first bit stream A _F . Then, the two codeword streams are subjected to joint mapping processing to generate a second complex symbol sequence C _N and a first complex symbol sequence C _{F of the} modulated signal, where the joint mapping process can be implemented by the following method:

9 is a schematic diagram of a second implementation process of the joint mapping process of the present invention. As shown in FIG. 9, the modulation and power allocation are performed on the far-end user and the near-user, and the second modulation signal E _{F of the} near-user, ie, the second receiving end, is obtained. The far user is the first modulated signal E _{N of the} first receiving end, and then the second modulated signal E _N is mirrored. The mirroring operation formula is:

Among them, the operator imag() represents the imaginary part of the complex number, and the real () operator represents the real part of the complex number.

Thus, the layer-mapped second symbol sequence S _N and the first symbol sequence S _F are separately precoded based on the second user's second precoding weight T′ _N and the far user's first precoding weight T _F . And superimposed, the superimposed transmitted signal S is obtained. The transmitting end transmits a transmitting signal S.

For example, suppose the number of antenna ports on the transmitting end is 4, the number of antenna ports on the receiving end is M, and 1 layer is used for mapping of the far-end user layer, and 1 layer is used for mapping near the user layer. In the above embodiment, 1 ≤ l ≤ M, 1 ≤ M ≤ 4, other implementations are the same, and will not be described here.

For example, it is assumed that the number of antenna ports at the transmitting end is 8, the number of antenna ports at the receiving end is M, and one layer is used for mapping of the far user layer, and one layer is used for mapping near the user layer. In the above embodiment, 1 ≤ l ≤ M, 1 ≤ M ≤ 8, other implementations are the same, and will not be described here.

Fourth embodiment

Assume that the number of antenna ports on the transmitting end is 2, the number of antenna ports on the receiving end is M, and one layer is used for mapping at the far user layer, and one layer is used for mapping near the user layer, where 1 ≤ l ≤ M, 1 ≤ M ≤ 2 .

The specific implementation is described as follows:

First, each user in the cell sends its own PMI and Channel Quality Indicator (CQI) to the base station, and the base station determines the first receiving end and the second receiving end according to the information provided by the user, and the channel quality of the second receiving end is better. At the first receiving end. Here, the first receiving end represents a far user, and the second receiving end represents a near user. The base station then sends the first precoding weight information of the far user to the second receiving end corresponding to the near user, and the first precoding weight of the far user is represented as T _F , where T _F =[P _{F_1} ]. P _{F_1} is the unique column vector of T _F .

Then, the near-user performs singular value decomposition (SVD, Singular Value Decomposition) processing on the measured downlink channel gain coefficient matrix to obtain a right singular matrix V of the near-user channel gain coefficient matrix H, and then takes the front of the right singular matrix. The matrix V(:, 1:1) formed by the column vectors. l is the number of layers.

Then, the near user calculates the phase parameter matrix G according to the first pre-encoding weights T _F and V(:, 1:1) of the far user, and G is a diagonal matrix, and the expression is still as shown in the formula (1).

Yes, the conjugate transposed matrix, according to the formula, in this embodiment, it is assumed that the precoding weights of the far user and the near user are taken from the codebook set, so that the given codebook set, the number of transmitting antennas, and the preamble can be used according to the given codebook set. The number of coding layers determines a reference set of phase adjustment parameters. The near user looks for a phase parameter codeword that is closest to the vector formed by the G diagonal elements in the reference set of the phase parameter matrix. The near user feeds back the index number of the phase parameter codeword to the base station.

Thereafter, the base station performs phase adjustment on the initial second precoding weight T _N of the near user according to the phase parameter matrix G, and obtains a new second precoding weight T′ _N =T _N G of the near user. Here, T _N is a matrix whose behavior 2 is l.

Finally, the base station pre-codes the first symbol sequence and the second symbol sequence according to the first pre-coding weight and the new second pre-coding weight, and then performs superposition to obtain the superposed transmission signal.

At the transmitting end of the base station, the source 0 and 1 bit streams are respectively turbo encoded to obtain the second bit stream A _N and the first bit stream A _F . Then, the two codeword streams are subjected to joint mapping processing to generate a second complex symbol sequence C _N and a first complex symbol sequence C _{F of the} modulated signal, where the joint mapping process can be implemented by the following method:

FIG. 8 is a schematic diagram of an implementation process of a joint mapping process according to the present invention. As shown in FIG. 8, a second bit stream of a near user performs bit operations with a first bit stream of a far user, such as an exclusive OR operation or a same OR operation. The first bit stream and the bit-processed second bit stream are then separately modulated and power allocated. Among them, the operator is the same or operator or XOR operator.

Thus, the layer-mapped second symbol sequence S _N and the first symbol sequence S _F are separately precoded based on the second user's second precoding weight T′ _N and the far user's first precoding weight T _F . And superimposed, the superimposed transmitted signal S is obtained. The transmitting end transmits a transmitting signal S.

For example, suppose the number of antenna ports on the transmitting end is 4, the number of antenna ports on the receiving end is M, and 1 layer is used for mapping of the far-end user layer, and 1 layer is used for mapping near the user layer. In the above embodiment, 1 ≤ l ≤ M, 1 ≤ M ≤ 4, other implementations are the same, and will not be described here.

For example, if the number of antenna ports at the transmitting end is 8, the number of antenna ports at the receiving end is M, and 1 layer is used for mapping of the far-user layer, and 1 layer is used for mapping near the user layer. In the above embodiment, 1 ≤ 1 ≤ M, 1 ≤ M ≤ 8, other implementations are the same, and will not be described here.

Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the foregoing storage medium may be configured to store program code for performing the following steps:

S1, receiving a phase adjustment parameter calculated according to the first precoding weight and the second channel gain coefficient of the second receiving end, which are fed back from the second receiving end;

S2, performing phase adjustment on the second precoding weight based on the received phase adjustment information;

S3. The transmitting end pre-codes and superimposes the symbols sent to the first receiving end and the symbols of the second receiving end by using the first pre-encoding weight and the phase-adjusted second pre-encoding weight to obtain a transmitting signal.

Optionally, in this embodiment, the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory. A variety of media that can store program code, such as a disc or a disc.

The above is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

In the embodiment of the present invention, the transmitting end sends the first precoding weight value fed back by the first receiving end to the second receiving end; the transmitting end receives the first precoding weight and the second feedback from the second receiving end. a phase adjustment parameter calculated by the second channel gain coefficient of the receiving end; the transmitting end performs phase adjustment on the second precoding weight based on the received phase adjustment information; the transmitting end uses the first precoding weight and the phase adjusted The second precoding weights respectively precode the symbols sent to the first receiving end and the symbols of the second receiving end and superimpose to obtain a transmitting signal. The method for processing a transmitted signal provided by the present invention performs a corresponding phase adjustment on a precoding weight of another receiving end according to a precoding weight of one of the receiving ends, so that the demodulated constellation of the superimposed transmitted signal at the receiving end is regular. In this way, even if the two receiving ends adopt different precoding weights, the constellation of the transmitted signal can be guaranteed to meet the Gray mapping rule, thereby satisfying the transmission performance requirement.

Claims (19)

1. A method for processing a transmitting signal, comprising: transmitting, by a transmitting end, a first precoding weight value fed back by a first receiving end to a second receiving end;

   The transmitting end receives the phase adjustment parameter calculated from the second receiving end and calculated according to the first precoding weight and the second channel gain coefficient of the second receiving end itself;

   The transmitting end performs phase adjustment on the second precoding weight based on the received phase adjustment information;

   The transmitting end pre-codes and superimposes the symbols sent to the first receiving end and the symbols of the second receiving end to obtain a transmitting signal, respectively, using the first pre-encoding weight and the phase-adjusted second pre-coding weight.
2. The method for processing a transmitted signal according to claim 1, wherein the method further comprises: the transmitting end determining, according to the precoding indication PMI feedback information of the receiving end and the channel quality information of the feedback, the first receiving end and the Second receiving end.
3. The method for processing a transmitted signal according to claim 1, wherein the transmitting the first pre-encoding weight fed back by the first receiving end to the second receiving end comprises:

   The first precoding weight is indicated by the index number of the codeword and is sent to the second receiving end;

   Or, the first precoding weight is indicated by the pilot and sent to the second receiving end.
4. The transmission signal processing method according to claim 1, wherein the number of columns of the first precoding weight is one.
5. The method for processing a transmitted signal according to claim 1, wherein the calculating, by the second receiving end, the phase adjustment information according to the first precoding weight and the channel gain coefficient of the second receiving end comprises:

   The second receiving end takes a first n column vector of a right singular matrix of its own downlink channel gain coefficient matrix to form a matrix, where n is the number of columns of the second precoding weight; and the formed matrix is reused The conjugate matrix is multiplied by the first precoding weight to obtain a projection vector;

   The phase of each row element on the diagonal of the phase parameter matrix G as the phase adjustment information is equal to the phase of the same row element of the obtained projection vector, the phase parameter matrix G is a diagonal matrix, and the diagonal of the phase parameter matrix G The modulus of the online elements is 1.
6. The method for processing a transmitted signal according to claim 1, wherein the feeding of the phase adjustment information to the transmitting end by the second receiving end comprises:

   The second receiving end quantizes the phase of the element on the diagonal line in the phase parameter matrix G, and feeds back the quantized phase parameter to the transmitting end to indicate a specific phase adjustment parameter; or

   The second receiving end determines a reference set of a phase adjustment parameter according to a given codebook set, a number of transmit antennas, and a precoding layer, and finds a diagonal element in the reference set and the phase parameter matrix G. The closest phase parameter codeword of the vector, and feeding back the index number of the phase parameter codeword to the transmitting end to indicate a specific phase adjustment parameter.
7. The transmit signal processing method according to claim 1, wherein the phase adjustment of the second precoding weight comprises:

   And multiplying the second pre-coding weight matrix by the phase parameter matrix.
8. The method for processing a transmitted signal according to claim 1, wherein the precoding and superimposing the symbols transmitted to the first receiving end and the symbols of the second receiving end respectively to obtain the transmitted signal comprises:

   The transmitting end performs a joint mapping and a layer mapping operation on the first bit stream and the second bit stream corresponding to the first receiving end and the second receiving end to obtain a first symbol sequence and a second symbol sequence;

   And precoding the obtained first symbol sequence and the second symbol sequence according to the first precoding weight and the phase adjusted second precoding weight respectively, and superimposing the precoded signals to obtain The transmitted signal.
9. The transmission signal processing method according to claim 8, wherein said obtaining a first symbol sequence, the second symbol sequence comprises:

   Performing a bit operation on the first bit stream and the second bit stream to obtain a third bit stream, the first bit stream is modulated to obtain the first symbol sequence, and the third bit stream is modulated to obtain the second bit stream Sequence; or,

   The first bit stream is modulated to obtain the first symbol sequence, and the second bit stream modulation The second symbol sequence is obtained by referring to the second symbol sequence, and the second symbol sequence is obtained by performing constellation point adjustment on the reference second symbol sequence according to the first symbol sequence.
10. A method for processing a transmitted signal, comprising: receiving, by a second receiving end, a first precoding weight value fed back from a first receiving end of the transmitting end;

    The second receiving end calculates the phase adjustment information according to the first precoding weight and its own channel gain coefficient and feeds back to the transmitting end.
11. The transmission signal processing method according to claim 10, wherein the number of columns of the first precoding weight is one.
12. The method for processing a transmitted signal according to claim 10, wherein the calculating, by the second receiving end, the phase adjustment information according to the first precoding weight and the channel gain coefficient of the second receiving end comprises:

    The second receiving end takes a first n column vector of a right singular matrix of its own downlink channel gain coefficient matrix to form a matrix, where n is the number of columns of the second precoding weight; and the formed matrix is reused The conjugate matrix is multiplied by the first precoding weight to obtain a projection vector;

    The phase of each row element on the diagonal of the phase parameter matrix G as the phase adjustment information is equal to the phase of the same row element of the obtained projection vector, the phase parameter matrix G is a diagonal matrix, and the diagonal of the phase parameter matrix G The modulus of the online elements is 1.
13. The method for processing a transmitted signal according to claim 10, wherein the feeding of the phase adjustment information to the transmitting end by the second receiving end comprises:

    The second receiving end quantizes the phase of the element on the diagonal line in the phase parameter matrix G, and feeds back the quantized phase parameter to the transmitting end to indicate a specific phase adjustment parameter; or

    The second receiving end determines a reference set of a phase adjustment parameter according to a given codebook set, a number of transmit antennas, and a precoding layer, and finds a diagonal element in the reference set and the phase parameter matrix G. The closest phase parameter codeword of the vector, and feeding back the index number of the phase parameter codeword to the transmitting end to indicate a specific phase adjustment parameter.
14. a transmitting end, comprising a first acquiring unit and a first processing unit, wherein

    a first acquiring unit, receiving a first precoding weight from the first receiving end, a second precoding weight from the second receiving end, and receiving a phase adjusting parameter from the second receiving end;

    a first processing unit, configured to send the first precoding weight to the second receiving end; perform phase adjustment on the second precoding weight based on the received phase adjustment information; and use the received first precoding weight And the phase-adjusted second pre-encoding weights respectively pre-code and superimpose the symbols sent to the first receiving end and the symbols of the second receiving end to obtain a transmitting signal.
15. The transmitting end according to claim 14, wherein the first obtaining unit is further configured to: determine the first receiving end and the second according to precoding weight information and channel quality information reported by each user in the cell Receiving end.
16. The transmitting end according to claim 14, wherein the first processing unit is specifically configured to:

    The first precoding weight is indicated by the index number of the codeword and is sent to the second receiving end; or the first precoding weight is indicated by the pilot and sent to the second receiving end;

    Right multiplying the second precoding weight matrix by the phase parameter matrix of the phase adjustment information;

    And performing a joint mapping and a layer mapping operation on the first bit stream and the second bit stream corresponding to the first receiving end and the second receiving end to obtain a first symbol sequence and a second symbol sequence; according to the first pre- The encoding weight and the phase adjusted second precoding weight respectively precode the obtained first symbol sequence and the second symbol sequence, and superimpose the precoded signals to obtain the transmission signal.
17. The transmitting end according to claim 16, wherein said obtaining a first symbol sequence, said second symbol sequence comprises:

    Performing a bit operation on the first bit stream and the second bit stream to obtain a third bit stream, the first bit stream is modulated to obtain the first symbol sequence, and the third bit stream is modulated to obtain the second bit stream Sequence; or,

    The first bit stream is modulated to obtain the first symbol sequence, and the second bit stream is modulated to obtain a reference second symbol sequence, and performing constellation point adjustment on the reference second symbol sequence according to the first symbol sequence to obtain the first Two symbol sequence.
18. a receiving end, comprising a second processing unit and a second acquiring unit, wherein

    a second acquiring unit, receiving a first precoding weight from the transmitting end;

    The second processing unit calculates phase adjustment information according to the received first precoding weight and its own channel gain coefficient; and feeds back the calculated phase adjustment information to the transmitting end.
19. The receiving end according to claim 18, wherein the second processing unit comprises: a first computing module, a second computing module; wherein

    The first calculation module is configured to form a matrix by using the first n column vectors of the right singular matrix of the downlink channel gain coefficient matrix of the downlink; wherein n is the number of columns of the second precoding weight;

    The second calculation module is configured to: multiply the transposed conjugate matrix of the matrix calculated by the first calculation module by the first pre-encoding weight to obtain a projection vector; as the phase parameter matrix G of the phase adjustment information The phase of each row element on the diagonal is equal to the phase of the same row element of the obtained projection vector, the phase parameter matrix G is a diagonal matrix, and the modulus of the elements on the diagonal of the phase parameter matrix G is 1.

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