CN114128179A

CN114128179A - Signal transmission method and device

Info

Publication number: CN114128179A
Application number: CN202080014828.6A
Authority: CN
Inventors: 金爵宁; 汪浩; 关文康; 花梦
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2022-03-01
Also published as: WO2022000345A1

Abstract

A signal transmission method and device are provided, wherein the method comprises the following steps: the first equipment generates a wireless signal according to the pre-coding matrix; the precoding matrix is determined according to a right singular matrix and an orthogonal matrix corresponding to a channel matrix between the first device and the second device; the orthogonal matrix is determined according to a Modulation and Coding Scheme (MCS) of the wireless signal; the first device transmits the wireless signal to the second device. In the above process, the precoding matrix is determined according to the orthogonal matrix, and the orthogonal matrix is used to implement interleaving among sub-channels on the premise of not increasing the transmission power, thereby implementing mixing of the transmission signals to different sub-channels, introducing space diversity gain, and reducing the channel quality difference of each layer of the receiving end.

Description

Signal transmission method and device

Technical Field

The present disclosure relates to the field of wireless communications technologies, and in particular, to a signal transmission method and apparatus.

Background

In a conventional wireless communication system, a signal transmission model of a point-to-point Multiple-Input Multiple-Output (MIMO) channel may be represented as follows:

y＝HPx+n···(1)

wherein

A matrix of channels is represented which,

a pre-coding matrix is represented which,

indicating a transmission symbol or a transmission signal,

representing zero-mean complex white gaussian noise,

representing the received signal. The sending end improves the system performance by designing a precoding matrix P. n is_SRepresenting the number of non-interfering parallel sub-channels or data streams, n_RRepresenting the number of receiving antennas, n_TIndicating the number of transmit antennas.

When x obeys ideal Gaussian distribution, the optimal precoding matrix P of the channel capacity is reached_optHas the following structure:

P _opt＝V _HΣ _WF···(2)

wherein V_HThe right singular matrix obtained after singular value decomposition for the channel matrix H, i.e.

Σ _WFA (diagonal) matrix is assigned to the power obtained by the water-filling algorithm. Will be provided with

And P_opt＝V _HΣ _WFThe signal transmission model substituted into the MIMO channel can be equivalently expressed as:

optimal precoding matrix P_optThe physical meaning of (A) is as follows: 1) through V_HChanging the channel matrix H to n_SParallel sub-channels not interfering with each other, wherein_HEach diagonal element of (a) represents a parallel subchannel; 2) performing water injection power distribution according to the channel strength of the parallel sub-channels, wherein ∑ is_WFThe square of each diagonal element of (a) represents the power allocated to that subchannel. At high signal-to-noise ratios, the optimal power allocation is approximated by allocating the same power to each sub-channel, i.e., Σ, according to the nature of the water-filling algorithm_WFAnd I is approximately distributed. The optimal precoding matrix at this time can be simplified to the following form:

P _opt＝V _H···(4)

however, in actual communications, each component of the transmitted symbol x is selected from a set of discrete constellations. In addition, to reduce system complexity, when n is used_SAnd when the code word is less than or equal to 4, all the sub-channels transmit the same code word, namely the same modulation constellation and channel coding are used. At this time, the system performance is determined by the worst sub-channel, and thusThe optimal precoding matrix in actual communication cannot obtain a good spatial diversity gain.

For example, suppose the modulation scheme of the transmitted symbol x is Quadrature Phase Shift Keying (QPSK), n_S2, the channel matrix is

V corresponding to the channel_HI. Neglecting the power allocation matrix, then P_optI. At this time, since the stream subchannel with singular value of 0.01 is too weak, the Log-likelihood ratio (LLR) of the bits carried by the symbols transmitted on the subchannel is too low, thereby causing the whole codeword to be in error.

Disclosure of Invention

An objective of the present invention is to provide a signal transmission method and apparatus, which are used to provide a precoding matrix to obtain a better spatial diversity gain.

It should be understood that, in the solutions provided in the embodiments of the present application, the communication apparatus may be a wireless communication device, or may be a part of a device in the wireless communication device, such as an integrated circuit product, such as a system chip or a communication chip. The wireless communication device may be a computer device that supports wireless communication functionality.

In particular, the wireless communication device may be a terminal, such as a smartphone, or a radio access network device, such as a base station. A system-on-chip may also be referred to as a system-on-chip (SoC), or simply as an SoC chip. The communication chip may include a baseband processing chip and a radio frequency processing chip. The baseband processing chip is sometimes also referred to as a modem (modem) or baseband chip. The rf processing chip is also sometimes referred to as a radio frequency transceiver (transceiver) or rf chip. In a physical implementation, part of the communication chip or all of the communication chip may be integrated inside the SoC chip. For example, the baseband processing chip is integrated in the SoC chip, and the radio frequency processing chip is not integrated with the SoC chip.

In a first aspect, a method is provided, comprising: the first equipment generates a wireless signal according to the pre-coding matrix; the first device transmits the wireless signal to the second device. Wherein the precoding matrix is based on a right singular matrix V corresponding to a channel matrix H between the first device and the second device_HAnd an orthogonal matrix V_PDetermining; the orthogonal matrix V_PIs determined according to the modulation coding scheme, MCS, of the wireless signal.

In the above procedure, the precoding matrix is based on the orthogonal matrix V_PDetermined, orthogonal matrix V_PThe method has the advantages that the interleaving among the sub-channels is realized on the premise of not increasing the transmitting power, so that the transmitting signals are mixed to different sub-channels, the space diversity gain is introduced, and the channel quality difference of each layer of the receiving end is reduced.

In an optional implementation manner, the first device includes a first association relationship, where the first association relationship is an association relationship between an MCS and a generation parameter; the generation parameters are used for determining the orthogonal matrix V_P(ii) a The first device determines the orthogonal matrix V according to the generation parameters associated with the MCS of the wireless signal in the first association relation_P。

In an optional implementation manner, the generation parameter associated with the MCS is an angle value when the wireless signal is modulated by the MCS, so that a block error rate BLER of the wireless signal is minimum.

In an optional implementation manner, the first device includes a second association relationship, where the second association relationship is an association relationship between an MCS, a type of a demodulation algorithm, and a generation parameter; the generation parameters are used for determining the orthogonal matrix V_P；

The first device determines the orthogonal matrix V according to the MCS of the wireless signal and the generation parameter associated with the type of the demodulation algorithm of the second device for demodulating the wireless signal in the second association relation_P。

In an optional implementation manner, the MCS and a generation parameter associated with a type of a demodulation algorithm used by the second device to demodulate the radio signal are angle values at which a block error rate BLER of the radio signal is minimized when the radio signal is modulated by the MCS and the second device uses the type of the demodulation algorithm.

In an optional implementation, the right singular matrix V_HFeedback from the second device; or, the right singular matrix V_HChannel estimation is determined for the first device based on channel reciprocity.

In an optional implementation manner, when the first device is a terminal device, the MCS of the wireless signal is from the second device; or, when the first device is a network device, the MCS of the wireless signal is determined by the first device.

In an optional implementation manner, the precoding matrix satisfies the following form: p ═ V_HV _P。

In a second aspect, the present application further provides a communication device having a method for implementing the method provided in the first aspect. The communication device may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or units corresponding to the above functions.

In one possible implementation, the communication device includes: a processor configured to enable the communication apparatus to perform the respective functions of the first device in the above-illustrated communication method. The communication device may also include a memory, which may be coupled to the processor, that retains program instructions and data necessary for the communication device. Optionally, the communication apparatus further comprises a communication interface for supporting communication between the communication apparatus and a second device or the like.

In one possible implementation, the communication device comprises corresponding functional units, each for implementing the steps in the above method. The functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions.

In a possible implementation manner, the structure of the communication device includes a processing unit and a communication unit, and these units may perform corresponding functions in the foregoing method example, which is specifically referred to the detailed description in the method example, and is not described herein again.

In a third aspect, a method is provided, comprising: the second device receiving the wireless signal from the first device; the wireless signals are generated according to a precoding matrix; wherein the precoding matrix is based on a right singular matrix V corresponding to a channel matrix H between the first device and the second device_HAnd an orthogonal matrix V_PDetermining; the orthogonal matrix V_PIs determined according to a Modulation Coding Scheme (MCS) of the wireless signal; the second device decodes the wireless signal according to the precoding matrix.

In the above process, the precoding matrix is determined according to the orthogonal matrix, and the orthogonal matrix is used to implement interleaving among sub-channels on the premise of not increasing the transmission power, thereby implementing mixing of the transmission signals to different sub-channels, introducing space diversity gain, and reducing the channel quality difference of each layer of the receiving end.

In an optional implementation manner, the first device includes a first association relationship, where the first association relationship is an association relationship between an MCS and a generation parameter; the generation parameters are used for determining the orthogonal matrix V_P(ii) a The second device determines the orthogonal matrix V according to the generation parameters associated with the MCS of the wireless signal in the first association relation_P。

In an optional implementation manner, the first device includes a second association relationship, where the second association relationship is MCS, demodulation algorithm type, and generationThe incidence relation among the parameters; the generation parameters are used for determining the orthogonal matrix V_P；

The second device determines the orthogonal matrix V according to the MCS of the wireless signal and generation parameters associated with the type of demodulation algorithm for demodulating the wireless signal by the second device in the second association relationship_P。

In an optional implementation manner, the right singular matrix is determined by the second device according to channel estimation.

In an optional implementation manner, when the first device is a terminal device, the second device sends the MCS of the wireless signal to the first device.

In a fourth aspect, the present application further provides a communication device having a method for implementing the third aspect. The communication device may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or units corresponding to the above functions.

In one possible implementation, the communication device includes: a processor configured to enable the communication apparatus to perform a corresponding function of the second device in the above-illustrated communication method. The communication device may also include a memory, which may be coupled to the processor, that retains program instructions and data necessary for the communication device. Optionally, the communication apparatus further comprises a communication interface for supporting communication between the communication apparatus and the first device or the like.

The present application further provides a communication apparatus, comprising: a processor and a memory;

wherein the memory is to store program instructions;

the processor is configured to execute program instructions stored in the memory to implement any of the possible methods of the first or second aspects.

The present application further provides a communication apparatus, comprising: a processor and an interface circuit;

wherein the interface circuit is configured to access a memory having stored therein program instructions;

the processor is configured to access the memory through the interface circuit and execute the program instructions stored in the memory to implement any of the possible methods of the first or second aspects.

The present application provides a computer-readable storage medium having computer-readable instructions stored thereon that, when read and executed by a computer, cause the communication device to perform the method of any one of the above possible designs.

The present application provides a computer program product which, when read and executed by a computer, causes the communication device to perform the method of any one of the possible designs described above.

The present application provides a chip, which is connected to a memory, and is configured to read and execute a software program stored in the memory, so as to implement the method in any one of the above possible designs.

The present application provides a system comprising the communication device of the second aspect, and the communication device of the third aspect.

Drawings

FIG. 1 is a schematic diagram of a scenario suitable for use in embodiments of the present application;

fig. 2 is a schematic flow chart of a signal transmission method according to an embodiment of the present application;

fig. 3 is a schematic diagram of wireless signal transmission according to an embodiment of the present application;

fig. 4 is a schematic diagram of wireless signal transmission according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

Embodiments of the present application will be described in further detail 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 Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD), a New Radio (NR), and the like, which are not limited herein.

In this embodiment, the terminal device may be a device having a wireless transceiving function or a chip that can be disposed in any device, and may also be referred to as a 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, an Augmented Reality (AR) terminal, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical treatment (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 network device may be a next Generation base station (gNB) in the NR system, an evolved node B (eNB) in the LTE system, or the like.

Fig. 1 is a schematic view of a scenario applicable to the embodiment of the present application. In fig. 1, a terminal apparatus 102 has access to a network apparatus 101. The network device 101 may determine a precoding matrix used when sending the downlink signal to the terminal device 102 by using the method provided in the embodiment of the present application; accordingly, the terminal device 102 may determine, by using the method provided in the embodiment of the present application, a precoding matrix used when transmitting the uplink signal to the network device 101. The following detailed description is made with reference to the accompanying drawings.

With reference to the foregoing description, as shown in fig. 2, a schematic flow chart of a signal transmission method provided in the embodiment of the present application is shown. Referring to fig. 2, the method includes:

step 201: the first equipment generates a wireless signal according to the pre-coding matrix;

wherein the precoding matrix is based on a right singular matrix V corresponding to a channel matrix H between the first device and the second device_HAnd an orthogonal matrix V_PDetermining; the orthogonal matrix V_PIs determined according to a Modulation Coding Scheme (MCS) of the wireless signal.

For example, in the embodiment of the present application, the precoding matrix P may satisfy the following form:

P＝V _HV _P。

wherein the orthogonal matrix V_PHow this is determined in particular, reference may be made to the following description.

Step 202: the first device transmits the wireless signal to the second device.

Step 203: the second device receives the wireless signal from the first device.

Wherein the wireless signal is generated according to a precoding matrix;

step 204: the second device decodes the wireless signal according to the precoding matrix.

In the flow shown in fig. 2, the types of the first device and the second device are not limited in the embodiment of the present application. For example, the first device may be a terminal device, the second device may be a network device, and the wireless signal sent by the first device is an uplink signal at this time; or the first device may be a network device, and the second device may be a terminal device, where the wireless signal sent by the first device is a downlink signal.

With reference to fig. 2, the following description will take an example in which the first device is a terminal device and the second device is a network device. Fig. 3 is a schematic diagram of wireless signal transmission according to an embodiment of the present application. The process shown in fig. 3 includes:

step 301: the network device indicates the MCS to the terminal device.

The MCS shown is the MCS used by the terminal device to transmit the wireless signal to the network device.

It should be noted that the network device may also configure a transmission mode of the terminal device, and when the transmission description is multi-stream transmission, the MCS used for each stream is the same, and details of the specific process are not repeated.

Step 302: terminal equipment determines right singular matrix V corresponding to channel matrix H_H。

In a first possible implementation manner, the network device may perform channel estimation on a channel between the network device and the terminal device to obtain a channel matrix H. The network equipment can carry out singular value decomposition on the channel matrix to obtain a right singular matrixV _HAnd the right singular matrix V_HAnd indicating the information to the terminal equipment.

In a second possible implementation manner, the terminal device may perform channel estimation according to channel reciprocity to obtain a channel matrix H, and then may perform singular value decomposition on the channel matrix to obtain a right singular matrix V_H。

Step 303: terminal equipment determines orthogonal matrix V_PAnd according to the right singular matrix V_HAnd an orthogonal matrix V_PA precoding matrix is determined.

In a first possible implementation manner, the terminal device may determine the orthogonal matrix V according to the MCS_P。

Specifically, the terminal device may include a first association relationship, where the first association relationship is an association relationship between an MCS and a generation parameter; the generation parameters are used for generating an orthogonal matrix V_P。

The terminal device may determine the orthogonal matrix V according to the generation parameter associated with the MCS acquired from the network device in the first association relationship_P。

For example, the orthogonal matrix V_PThe following form can be satisfied:

wherein G is_ij(θ _ij) The (I, I), (I, j), (j, I) and (j, j) th components of the unit matrix I are replaced by cos (theta)_ij)，-sin(θ _ij)，sin(θ _ij) And cos (θ)_ij) Obtained after that, i ═ 1,2, · -n_S-1；j＝2,3,···n _S；n _SRepresenting the number of data streams comprised by the radio signal, angle theta_ijIs a generating parameter, angle θ_ijIs determined according to MCS, or angle theta_ijIs based on MCS and demodulates the wireless signalIs determined by the type of demodulation algorithm(s) of (a).

Suppose n_SWhen the value is equal to 2, the first association relation may satisfy table 1.

TABLE 1

MCS	Generating parameters
MCS1	θ1
MCS2	θ2
MCS3	θ3
MCS4	θ4
MCS5	θ5

In conjunction with the foregoing description, if the MCS acquired by the terminal device is MCS3, the generation parameter associated with MCS3 may be determined to be θ 3 according to the first association relationship, and the terminal device may substitute the generation parameter θ 3 into equation (5), so that the orthogonal matrix V may be determined_P。

When n is in the specification_SEqual to 2, the generation parameter of each MCS association includes an angle theta_ij(ii) a When n is_SGreater than 2, the generation parameters of each MCS association include a plurality of angles θ_ij。

It should be noted that the first association relationship is configured in the terminal device in advance, and the first association relationship may be determined by a device such as the terminal device or the network device, which is not limited in this embodiment of the application. In the embodiment of the present application, all possible MCS to be used may be determined in advance. With reference to equation (5), for each MCS of all possible MCSs, a generation parameter that minimizes a Block Error Rate (BLER) of the radio signal when the radio signal is modulated by the MCS is used as a generation parameter associated with the MCS. According to the above method, the generation parameter of each MCS association can be determined, thereby determining the first association relationship.

In a second possible implementation manner, the terminal device may determine the orthogonal matrix V according to the MCS and the type of the demodulation algorithm used by the network device to demodulate the wireless signal_P. The type of the demodulation algorithm for the network device to demodulate the wireless signal may be indicated to the terminal device by the network device, and the terminal device may also determine the type of the demodulation algorithm for the network device to demodulate the wireless signal in other manners.

Specifically, the terminal device may include a second association relationship, where the second association relationship is an association relationship between an MCS, a demodulation algorithm type, and a generation parameter; the generation parameters are used for generating an orthogonal matrix V_P。

The terminal device may determine the orthogonal matrix V according to the MCS obtained from the network device in the second association relationship and the generation parameter associated with the type of the demodulation algorithm used by the network device to demodulate the wireless signal_P。

For example, assume n_SWhen it is equal to 2, the second association relation may satisfy table 2.

TABLE 2

MCS	Type of demodulation algorithm	Generating parameters
MCS1	Type 1	θ1
MCS1	Type 2	θ2
MCS2	Type 1	θ3
MCS2	Type 2	θ4

With reference to the foregoing description, if the MCS obtained by the terminal device is MCS1 and the type of the demodulation algorithm for the network device to demodulate the wireless signal is type 2, the generation parameter may be determined to be θ 2 according to the second association relationship, and the terminal device may substitute the generation parameter θ 2 into formula (5) to determine the orthogonal matrix V_P。

It should be noted that the second association relationship is configured in the terminal device in advance, and the second association relationship may be determined by a device such as the terminal device or the network device, which is not limited in this embodiment of the application. In the embodiment of the present application, all possible MCSs and types of demodulation algorithms to be used may be predetermined. In conjunction with equation (5), for each MCS of all possible MCSs to be used, and for each type of demodulation algorithm, the generation parameter that minimizes the BLER of the radio signal when the radio signal is modulated using that MCS and the type of demodulation algorithm is used, is used as the generation parameter associated with that MCS and type of demodulation algorithm. According to the above method, generation parameters associated with each MCS and demodulation algorithm type can be determined, thereby determining the second association relationship.

Step 304: and the terminal equipment transmits a wireless signal to the network equipment by adopting the precoding matrix.

Step 305: and the network equipment receives the wireless signal from the terminal equipment and decodes the wireless signal according to the precoding matrix.

It should be noted that the network device may determine the precoding matrix in the same manner as the terminal device, and the precoding matrix determined by the network device for decoding the wireless signal is the same as the precoding matrix used by the terminal device for transmitting the wireless signal, and the specific process is not repeated.

In connection with the foregoing description, for example, assume that the MCS is QPSK, n_S2, the channel matrix is

The right singular matrix V corresponding to the channel matrix_HI, where I is an identity matrix. Order to

The signal received by the network device is:

because the first sub-channel simultaneously contains the transmitting symbol x₁And x₂The LLRs of all bits are more even during demodulation, so that the demodulation performance of the whole code word can be improved. For example, consider the case of high snr and directly making symbol hard decision, at this time, the received signal y of only the first sub-channel can be passed₁At the same time solve for x₁And x ₂. For example when y₁When x is 0.6+1.2i, x is known₁1+ i and x₂＝1-i。

As can be seen from the above examples, the orthogonal matrix V provided in the embodiments of the present application_PThe effect of spatial subchannel interleaving is achieved by introducing a certain amount of inter-stream interference. For the above example, the introduced Signal-to-Interference Ratio (SIR) between streams can be defined as

For different MCSs, different strength SIR needs to be introduced, so that the receivers of the network devices solve for (x) at the same time₁,x ₂) The probability of (c) is the greatest.

Further, with reference to fig. 2, the following description will take the first device as a network device and the second device as a terminal device as an example. Fig. 4 is a schematic diagram of wireless signal transmission according to an embodiment of the present application. The process shown in fig. 4 includes:

step 401: network equipment determines right singular matrix V corresponding to channel matrix H_H。

In a first possible implementation manner, the network device obtains the right singular matrix V indicated by the terminal device_H。

Specifically, the terminal device may perform channel estimation on a channel between the terminal device and the network device to obtain a channel matrix H. The terminal equipment can carry out singular value decomposition on the channel matrix to obtain a right singular matrix V_HAnd the right singular matrix V_HIndicating to the network device.

In a second possible implementation manner, the network device may perform channel estimation according to channel reciprocity to obtain a channel matrix H, and then may perform singular value decomposition on the channel matrix to obtain a right singular matrix V_H。

Step 402: network device determining orthogonal matrix V_PAnd according to the right singular matrix V_HAnd an orthogonal matrix V _PA precoding matrix is determined.

In a first possible implementation manner, the network device may determine the orthogonal matrix V according to the MCS_P。

Specifically, the network device may include a first association relationship, where the first association relationship is an association relationship between an MCS and a generation parameter; the generation parameters are used for generating an orthogonal matrix V_P。

The network device may determine the orthogonal matrix V according to the generated parameter associated with the MCS in the first association relation_P。

First incidence relation and orthogonal matrix V_PFor details, reference may be made to the foregoing description, which is not repeated herein.

The MCS is determined by the network device, and the network device may determine the MCS to be used before sending the wireless signal to the terminal device, and how to determine the MCS specifically, which is not limited in the embodiment of the present application.

In a second possible implementation manner, the network device may determine the orthogonal matrix V according to the MCS and the type of the demodulation algorithm used by the terminal device to demodulate the wireless signal_P. The type of the demodulation algorithm for the terminal device to demodulate the wireless signal may be indicated to the network device by the terminal device, and the network device may also determine the type of the demodulation algorithm for the terminal device to demodulate the wireless signal in other manners.

Specifically, the network device may include a second association relationship, where the second association relationship is an association relationship between an MCS, a type of a demodulation algorithm, and a generation parameter; the generation parameters are used for generating an orthogonal matrix V_P。

The network device may determine the orthogonal matrix V according to the generation parameters associated with the MCS and the type of the demodulation algorithm for the network device to demodulate the wireless signal in the second association relationship_PFor the specific process, reference may be made to the foregoing description, which is not repeated herein.

Step 403: the network device indicates the MCS to the terminal device.

The MCS shown is the MCS used by the network device to transmit the wireless signal to the terminal device.

It should be noted that the network device may also indicate the precoding matrix to the terminal device, and if the network device does not indicate the precoding matrix, the terminal device may determine the precoding matrix by using the same method as the network device, and details of the specific process are not repeated.

Step 404: and the network equipment sends a wireless signal to the terminal equipment by adopting the precoding matrix.

Step 405: and the terminal equipment receives the wireless signals from the network equipment and decodes the wireless signals according to the precoding matrix.

In the above process, the precoding matrix is obtained by using the right singular matrix and the orthogonal matrix of the channel matrix. Because the orthogonal matrix can mix the transmitted signals to different sub-channels, space diversity gain is introduced, and the channel quality difference of each layer of the receiving end is reduced, thereby performing space interleaving on the transmitted signals among the sub-channels and improving the space diversity gain of the system.

The various embodiments described herein may be implemented as stand-alone solutions or combined in accordance with inherent logic and are intended to fall within the scope of the present application.

In the embodiments provided in the present application, the method provided in the embodiments of the present application is introduced from the perspective of interaction between the devices. In order to implement the functions in the method provided by the embodiments of the present application, the first device or the second device may include a hardware structure and/or a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.

The division of the modules in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. In addition, functional modules in the embodiments of the present application may be integrated into one processor, may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

Similar to the above concept, as shown in fig. 5, an apparatus 500 is further provided to implement the functions of the first device or the second device in the above method. The device may be a software module or a system-on-a-chip, for example. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. The apparatus 500 may comprise: a processing unit 501 and a communication unit 502.

In this embodiment of the present application, the communication unit may also be referred to as a transceiver unit, and may include a transmitting unit and/or a receiving unit, which are respectively configured to perform the steps of transmitting and receiving by the first device or the second device in the foregoing method embodiments.

Hereinafter, the communication device according to the embodiment of the present application will be described in detail with reference to fig. 5 to 6. It should be understood that the description of the apparatus embodiments corresponds to the description of the method embodiments, and therefore, for brevity, details are not repeated here, since the details that are not described in detail may be referred to the above method embodiments.

The communication unit may also be referred to as a transceiver, a transceiving means, etc. A processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, or the like. Alternatively, a device in the communication unit 502 for implementing a receiving function may be regarded as a receiving unit, and a device in the communication unit 502 for implementing a transmitting function may be regarded as a transmitting unit, that is, the communication unit 502 includes a receiving unit and a transmitting unit. A communication unit may also sometimes be referred to as a transceiver, transceiving circuitry, or the like. A receiving unit may also be referred to as a receiver, a receiving circuit, or the like. A transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.

It should be understood that the communication unit 502 is configured to perform the transmitting operation and the receiving operation of the first device in the method embodiment shown in fig. 2, 3, or 4, and the processing unit 501 is configured to perform other operations besides the transceiving operation of the first device in the method embodiment shown in fig. 2, 3, or 4.

Alternatively, the communication unit 502 is configured to perform the sending operation and the receiving operation of the second device in the method embodiment shown in fig. 2, fig. 3, or fig. 4, and the processing unit 501 is configured to perform other operations, except the sending and receiving operations, of the second device in the method embodiment shown in fig. 2, fig. 3, or fig. 4.

As shown in fig. 6, which is a device 600 provided in the embodiment of the present application, the device shown in fig. 6 may be implemented as a hardware circuit of the device shown in fig. 5. The communication device may be adapted to perform the functions of the first device or the second device in the above described method embodiments in the previously illustrated flow charts. For ease of illustration, fig. 6 shows only the main components of the communication device.

The apparatus 600 may also include at least one memory 603 for storing program instructions and/or data. The memory 603 is coupled to the processor 601. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules. The processor 601 may cooperate with the memory 603. The processor 601 may execute program instructions stored in the memory 603. At least one of the at least one memory may be included in the processor.

The apparatus 600 shown in fig. 6 comprises at least one processor 601 and a communication interface 602, the processor 601 being arranged to execute instructions or programs stored in a memory 603. When the instructions or programs stored in the memory 603 are executed, the processor 601 is configured to perform the operations performed by the processing unit 501 in the above-described embodiment, and the communication interface 602 is configured to perform the operations performed by the communication unit 502 in the above-described embodiment.

In embodiments of the present application, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface. In the embodiment of the present application, when the communication interface is a transceiver, the transceiver may include an independent receiver and an independent transmitter; a transceiver that integrates transceiving functions, or a communication interface may also be used.

The apparatus 600 may also include communication lines 604. The communication interface 602, the processor 601, and the memory 603 may be connected to each other via a communication line 604; the communication line 604 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication lines 604 may be divided into address buses, data buses, control buses, and the like. For ease of illustration, only one thick line is shown in FIG. 6, but this is not intended to represent only one bus or type of bus.

Embodiments of the present application further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, may implement the process related to the first device in the embodiments shown in fig. 3 or fig. 4 and provided in the foregoing method embodiments.

Embodiments of the present application further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, may implement the process related to the second device in the embodiments shown in fig. 3 or fig. 4 and provided in the foregoing method embodiments.

Embodiments of the present application further provide a computer program product containing instructions, which when executed perform the method of the first device in the method embodiment shown in fig. 3 or fig. 4.

Embodiments of the present application further provide a computer program product containing instructions, which when executed perform the method of the second device in the method embodiment shown in fig. 3 or fig. 4.

An embodiment of the present application further provides a chip, which includes a processor, where the processor is coupled to a memory, and is configured to execute a computer program or an instruction stored in the memory, and when the processor executes the computer program or the instruction, the processor executes the method of the first device in the method embodiment shown in fig. 3 or fig. 4.

An embodiment of the present application further provides a chip, which includes a processor, where the processor is coupled to a memory, and is configured to execute a computer program or an instruction stored in the memory, and when the processor executes the computer program or the instruction, the processor executes the method of the second device in the method embodiment shown in fig. 3 or fig. 4.

It should also be understood that the reference herein to first, second, and various numerical designations is merely a convenient division to describe and is not intended to limit the scope of the present application.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, some or all of the steps may be executed in parallel or executed sequentially, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

A signal transmission method, comprising:

the first equipment generates a wireless signal according to the pre-coding matrix;

wherein the precoding matrix is based on a right singular matrix V corresponding to a channel matrix H between the first device and the second device_HAnd an orthogonal matrix V_PDetermining; the orthogonal matrix V_PIs determined according to a Modulation Coding Scheme (MCS) of the wireless signal;

the first device transmits the wireless signal to the second device.
The method of claim 1, wherein the first device comprises a first association relationship, and the first association relationship is an association relationship between MCS and generation parameters; the generation parameters are used for determining the orthogonal matrix V_P；

The first device determines the orthogonal matrix V according to the generation parameters associated with the MCS of the wireless signal in the first association relation _P。
The method of claim 2, wherein the generated parameter associated with the MCS is an angle value of the wireless signal when the MCS modulation is adopted such that a block error rate (BLER) of the wireless signal is minimum.
The method according to claim 1, wherein the first device comprises a second association relationship, and the second association relationship is an association relationship between MCS, demodulation algorithm type and generation parameter; the generation parameters are used for determining the orthogonal matrix V_P；

The first device determines the orthogonal matrix V according to the MCS of the wireless signal and the generation parameter associated with the type of the demodulation algorithm of the second device for demodulating the wireless signal in the second association relation_P。
The method of claim 4, wherein the parameter associated with the MCS and the type of demodulation algorithm used by the second device to demodulate the radio signal is an angle value at which the BLER is the minimum when the radio signal is modulated by the MCS and the type of demodulation algorithm used by the second device.
The method according to any of claims 1 to 5, wherein the right singular matrix V_HFeedback from the second device;

or, the right singular matrix V_HChannel estimation is determined for the first device based on channel reciprocity.
The method of any of claims 1 to 6, wherein the MCS for the wireless signal is from the second device when the first device is a terminal device;

or, when the first device is a network device, the MCS of the wireless signal is determined by the first device.
The method according to any of claims 1 to 7, wherein the precoding matrix satisfies the following form:

P＝V _HV _P。
a signal transmission method, comprising:

the second device receiving the wireless signal from the first device; the wireless signals are generated according to a precoding matrix;

wherein the precoding matrix is based on a right singular matrix V corresponding to a channel matrix H between the first device and the second device_HAnd an orthogonal matrix V_PDetermining; the orthogonal matrix V_PIs determined according to a Modulation Coding Scheme (MCS) of the wireless signal;

the second device decodes the wireless signal according to the precoding matrix.
The method of claim 9, wherein the first device comprises a first association relationship, and the first association relationship is an association relationship between MCS and generation parameters; the generation parameters are used for determining the orthogonal matrix V_P；

The second device determines the orthogonal matrix V according to the generation parameters associated with the MCS of the wireless signal in the first association relation_P。
The method of claim 10, wherein the generated parameter associated with the MCS is an angle value of the wireless signal when the MCS modulation is adopted such that a block error rate (BLER) of the wireless signal is minimum.
The method of claim 9, wherein the step of determining the target position is performed by a computerThe first device comprises a second association relation, wherein the second association relation is the association relation among the MCS, the type of the demodulation algorithm and the generation parameter; the generation parameters are used for determining the orthogonal matrix V_P；

The second device determines the orthogonal matrix V according to the MCS of the wireless signal and generation parameters associated with the type of demodulation algorithm for demodulating the wireless signal by the second device in the second association relationship_P。
The method of claim 12, wherein the parameter associated with the MCS and the type of the demodulation algorithm used by the second device to demodulate the radio signal is an angle value at which the block error rate BLER of the radio signal is minimized when the radio signal is modulated by the MCS and the type of the demodulation algorithm is used by the second device.
The method according to any of claims 9 to 13, wherein the right singular matrix V_HDetermined for the second device based on the channel estimate.
The method of any of claims 9 to 14, wherein the second device sends the MCS of the wireless signal to the first device when the first device is a terminal device.
The method according to any of claims 9 to 15, wherein the precoding matrix satisfies the following form:

P＝V _HV _P。
a communications apparatus, comprising: a processor and a memory;

wherein the memory is to store program instructions;

the processor is configured to execute program instructions stored in the memory to implement the method of any of claims 1 to 16.
A communications apparatus, comprising:

a processor and an interface circuit;

wherein the interface circuit is configured to access a memory having stored therein program instructions;

the processor is configured to access the memory through the interface circuit and execute program instructions stored in the memory to implement the method of any of claims 1 to 16.
A computer-readable storage medium, characterized in that a program code is stored in the computer-readable storage medium, which program code, when executed by a computer, implements the method of any one of claims 1 to 16.
A computer program product comprising program code means for performing the method of any one of claims 1 to 16 when said program code means is executed by a computer.