CN114584187A

CN114584187A - Data detection method and communication device

Info

Publication number: CN114584187A
Application number: CN202011378080.6A
Authority: CN
Inventors: 高翔; 刘鹍鹏; 刘显达
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2022-06-03
Also published as: WO2022111119A1

Abstract

The application provides a data detection method and a communication device, wherein the method comprises the following steps: the terminal equipment detects data on a first time-frequency resource and a first space resource, the data on the first time-frequency resource and the first space resource are associated with a first factor, the data on different first time-frequency resources and the first space resource are associated with first factors which are determined independently, the first factor is a scalar and is used for precoding the data associated with the first factor, one first time-frequency resource comprises one or more frequency-domain resource groups, and one first space resource comprises one or more space layers. The data on one first time-frequency resource and one first spatial resource are precoded by the same factor, so that the network device does not have to indicate a factor to the terminal device for each RE and each spatial layer. Therefore, the method provided by the application is beneficial to saving the cost of the indication signaling.

Description

Data detection method and communication device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a data detection method and a communications apparatus.

Background

Currently, Multiple Input and Multiple Output (MIMO) precoding techniques are classified into linear precoding and nonlinear precoding according to different signal processing modes. For linear precoding, the solution of the precoding matrix is only related to the channel matrix. For nonlinear precoding, the calculation of the precoding matrix is related to both the channel matrix and the transmitted modulation symbols (e.g., the transmitting end performs nonlinear operations such as interference cancellation and modulo). For example, the nonlinear precoding includes tomlinson-harashinma precoding (THP) or Vector Perturbation (VP) precoding, and the like. Linear precoding includes zero-forcing (ZF) precoding, regular zero-forcing (RZF) precoding, eigenzero-forcing (EZF) precoding, minimum mean-square error (MMSE) precoding, and the like.

For some linear precoding or nonlinear precoding, a special factor needs to be introduced in the precoding process to perform precoding, so as to reduce data transmission power and improve data transmission performance. Accordingly, the receiving end needs to know the factor used by the transmitting end for precoding, so as to complete correct data detection. Since the optimal factor is related to the transmitted symbols of the network device on the time-frequency resources and the spatial layer. Theoretically, for a Resource Element (RE), the transmission symbols of the network device on each spatial layer correspond to an optimal factor. However, if the network device notifies the terminal device of a factor for each spatial layer for each RE, this may cause a large signaling overhead. Therefore, how to reduce the signaling overhead of the network device notification factor is a problem to be solved urgently at present.

Disclosure of Invention

The application provides a data detection method and a communication device, which are beneficial to reducing the signaling overhead of notification factors of network equipment.

In a first aspect, the present application provides a data detection method, including: the terminal equipment detects data on a first time-frequency resource and a first space resource, the data on the first time-frequency resource and the first space resource are associated with a first factor, the data on different first time-frequency resources and the first space resource are associated with first factors which are determined independently, the first factor is a scalar and is used for precoding the data associated with the first factor, one first time-frequency resource comprises one or more frequency-domain resource groups, and one first space resource comprises one or more space layers.

It can be seen that, based on the method described in the first aspect, data on one first time-frequency resource and one first spatial resource are precoded by the same factor. So that the network device does not have to indicate a factor to the terminal device for each RE and each spatial layer. Therefore, based on the method described in the first aspect, it is beneficial to save the overhead of the indication signaling.

In a possible implementation, the terminal device may further receive at least one reference signal that is precoded, where a second time-frequency resource and a second space resource are associated with one reference signal, data on the second time-frequency resource and the second space resource are associated with a second factor, the second factor is a scalar for precoding the data associated with the second factor, where a second time-frequency resource includes one or more frequency-domain resource groups, and a second space resource includes one or more space layers; the terminal device may also detect data on a second time-frequency resource and a second spatial resource associated with the reference signal based on the reference signal. Based on the possible implementation mode, the time frequency resource scheduled by the network equipment can be divided into the first time frequency resource and the second time frequency resource, so that data on the first time frequency resource and the second time frequency resource can be precoded by using different factors, the granularity of the factors can be finer, and the system performance can be improved. And based on the possible implementation mode, the network equipment does not need to indicate the factors for precoding the second time-frequency resources and the second space resources, so that the cost of indication signaling can be saved.

Alternatively, the reference signal may comprise one or more reference signal symbols, one reference signal symbol representing one reference signal element. The reference signal symbols may be demodulation reference signal (DMRS) symbols, or the reference signal symbols may be symbols on part of resources in one DMRS resource, or the reference signal symbols may also be other types of reference signal symbols. One reference signal may comprise reference signal symbols located in different time frequency units. One reference signal symbol may correspond to one reference signal port, and one reference signal port may correspond to one spatial layer. The reference signal symbols corresponding to different reference signal ports may constitute a reference signal symbol vector. The different reference signal ports may be orthogonal ports, that is, the reference signal symbols corresponding to the different reference signal ports may be sent in one or more of frequency division multiplexing, time division multiplexing, or code division multiplexing. The multiple reference signal symbols may be transmitted on different time frequency resources, or may be transmitted on the same time frequency resource.

In a possible implementation, the terminal device may further receive indication information sent by the network device, where the indication information is used to indicate at least one first information, and one first information is related to one first factor, and one first information is associated with one second time-frequency resource and one second space resource; the specific implementation manner of the terminal device detecting the data on the first time-frequency resource and the first space resource is as follows: and the terminal equipment detects data pre-coded by a first factor related to the first information based on the first information and a target reference signal in at least one reference signal, wherein a second time-frequency resource and a second space resource related to the target reference signal are a second time-frequency resource and a second space resource related to the first information. Based on the possible implementation, the network device may further indicate, by signaling, to the terminal device, first information related to the first factor, so that the terminal device may detect data on the first time-frequency resource and the first spatial resource based on the first information.

Optionally, the second factor associated with the data on the second time-frequency resource and the second spatial resource is further used for precoding the reference signal associated with the second time-frequency resource and the second spatial resource.

Optionally, a first factor is associated with one or more second factors, and a first message is associated with a first factor and a second factor associated with the first factor.

In a possible implementation, the first information is a difference between the first factor and a second factor associated with the first factor, or the first information is a quotient between the first factor and a second factor associated with the first factor. The first information in this possible implementation facilitates the terminal device to accurately detect the data precoded based on the first factor to which the first information relates.

In one possible implementation, the first factor relates to one or more of the following items of information: the data on the first time-frequency resource, a first channel matrix corresponding to the first time-frequency resource or a first pre-coding matrix corresponding to the first time-frequency resource; the second factor relates to one or more of the following information: data on the second time frequency resource, a reference signal associated with the second time frequency resource, a second channel matrix corresponding to the second time frequency resource, or a second precoding matrix corresponding to the second time frequency resource. The data on the first time-frequency resource may be transmission data symbols on all corresponding spatial layers on the first time-frequency resource. The data on the second time-frequency resource may be transmission data symbols on all corresponding spatial layers on the second time-frequency resource. The reference signals associated with the second time-frequency resource may be reference signal symbols corresponding to all spatial layers corresponding to the second time-frequency resource. Based on the possible implementation mode, the corresponding channel matrix, the precoding matrix and the sent data signal are considered in a factor combination mode, the signal and channel characteristics are utilized to the maximum extent, the optimal interference avoidance and signal power improvement are achieved, and the system performance is improved.

In one possible implementation, there are one or more sets of time-frequency resources, one set of time-frequency resources comprising one or more first time-frequency resources and one or more second time-frequency resources. By the division method, one time-frequency resource set is further divided into time-frequency resource subsets with smaller granularity by the first time-frequency resource and the second time-frequency resource, and each time-frequency resource subset only contains less time-frequency resources. Different time frequency resource subsets correspond to different phase factors, and fine phase factor adjustment is facilitated, so that power efficiency improvement brought by the phase factors is improved as much as possible.

In one possible implementation, the first time-frequency resource includes time-domain resources that are different from the time-domain resources included in the second time-frequency resource. For example, the first time-frequency resource and the second time-frequency resource occupy the same subcarrier, but occupy different OFDM symbols. Or the first time-frequency resource and the second time-frequency resource occupy different subcarriers and occupy different OFDM symbols. Based on the possible implementation manner, the second time-frequency resource can be closer to the reference signal resource correspondingly bearing the phase factor corresponding to the second time-frequency resource in time according to the resource allocation manner of the reference signal, and the method is favorable for accurately estimating the equivalent channel corresponding to the data on the second time-frequency resource based on the reference signal.

In one possible implementation, the first time-frequency resource includes frequency-domain resources that are different from frequency-domain resources included in the second time-frequency resource. For example, the first time-frequency resource and the second time-frequency resource occupy different subcarriers, and occupy the same OFDM symbol. Or the first time-frequency resource and the second time-frequency resource occupy different subcarriers and occupy different OFDM symbols. Based on the possible implementation manner, the second time-frequency resource can be closer to the reference signal resource correspondingly bearing the phase factor corresponding to the second time-frequency resource in the frequency domain according to the resource allocation manner of the reference signal, which is beneficial to accurately estimating the equivalent channel corresponding to the data on the second time-frequency resource based on the reference signal.

In a possible implementation, the at least one first information is information in a first information set.

In one possible implementation, the number of the first time-frequency resources and/or the number of the second time-frequency resources are predefined by a protocol; or before the terminal device receives the indication information sent by the network device, the terminal device may further receive configuration information sent by the network device, where the configuration information is used to configure the number of the first time-frequency resources and/or the number of the second time-frequency resources. Based on the possible implementation mode, the notification number of the first information is guaranteed to be fixed, and therefore fixed signaling overhead is guaranteed. Therefore, the terminal equipment only needs to detect the indication information with fixed bit length, thereby being beneficial to reducing the blind detection times, reducing the processing complexity and the processing time delay of the terminal equipment and saving the power consumption of the terminal equipment.

Optionally, the terminal device determines, based on the time-frequency resources of the downlink data scheduled by the network device, the number of the first time-frequency resources and/or the number of the second time-frequency resources, the time-frequency resources included in each first time-frequency resource and/or the time-frequency resources included in each second time-frequency resource. Based on the optional implementation manner, the terminal device can accurately determine the time-frequency resources included in each first time-frequency resource and/or the time-frequency resources included in each second time-frequency resource based on a preset rule.

In a possible implementation, the number of frequency domain resources (or the bandwidth of the second time frequency resource in the frequency domain) included in the second time frequency resource is protocol-specified or configured by the network device. For example, the second time-frequency resource may include 1 PRG as the number of frequency-domain resources. Optionally, the terminal device may divide one or more second time-frequency resources in the scheduled time-frequency resources according to a preset second time-frequency resource division method based on the number of frequency-domain resources included in the second time-frequency resources.

In one possible implementation, the number of frequency domain resources (or the bandwidth of the first time frequency resource in the frequency domain) included in the first time frequency resource is protocol-specified or configured by the network device. For example, the first time-frequency resource may include 1 PRG as the number of frequency-domain resources. Optionally, the terminal device may divide one or more first time-frequency resources in the scheduled time-frequency resources according to a preset first time-frequency resource division method based on the number of frequency domain resources included in the first time-frequency resources.

In a possible implementation, when one or more time-frequency resource sets are available, the number of the time-frequency resource sets and/or the number of first time-frequency resources included in the time-frequency resource sets and/or the number of second time-frequency resources included in the time-frequency resource sets are predefined by a protocol; or, when there are one or more time-frequency resource sets, before the terminal device receives the indication information sent by the network device, the terminal device may further receive configuration information sent by the network device, where the configuration information is used to configure the number of the time-frequency resource sets and/or the number of the first time-frequency resources included in the time-frequency resource sets and/or the number of the second time-frequency resources included in the time-frequency resource sets. Based on the possible implementation mode, the notification number of the first information is guaranteed to be fixed, and therefore fixed signaling overhead is guaranteed. Therefore, the terminal equipment only needs to detect the indication information with fixed bit length, thereby being beneficial to reducing the blind detection times, reducing the processing complexity and the processing time delay of the terminal equipment and saving the power consumption of the terminal equipment.

Optionally, the terminal device determines, based on the time-frequency resources of the downlink data scheduled by the network device, the number of the time-frequency resource sets and/or the number of the first time-frequency resources included in the time-frequency resource set and/or the number of the second time-frequency resources included in the time-frequency resource set, the time-frequency resources included in the first time-frequency resources in each time-frequency resource set and/or the time-frequency resources included in the second time-frequency resources. Based on the optional implementation manner, the terminal device can accurately determine the time-frequency resources included in the first time-frequency resources and/or the time-frequency resources included in the second time-frequency resources in each time-frequency resource set based on a preset rule.

In one possible implementation, the number of first space resources is pre-specified by the protocol; or before the terminal device receives the indication information sent by the network device, the terminal device may further receive configuration information sent by the network device, where the configuration information is used to configure the number of the first space resources. Based on the possible implementation mode, the notification number of the first information is guaranteed to be fixed, and therefore fixed signaling overhead is guaranteed. Therefore, the terminal equipment only needs to detect the indication information with fixed bit length, thereby being beneficial to reducing the blind detection times, reducing the processing complexity and the processing time delay of the terminal equipment and saving the power consumption of the terminal equipment.

Optionally, the terminal device determines the spatial layers included in the first spatial resource based on the number of the spatial layers of the terminal device and the number of the first spatial resource. Based on the possible implementation manner, the terminal device can accurately determine the spatial layer included in the first spatial resource.

In one possible implementation, the process of precoding the data by the first factor is:

wherein s is(s)₁,s₂,…,s_L)^TWhich is indicative of the data that is being transmitted,

is a diagonal matrix, beta is a power adjustment factor,

or

Or

And W is a linear precoding matrix.

In one possible implementation, the process of precoding the data or reference signal by the second factor is:

wherein s ═ s(s)₁,s₂,…,s_L)^TIndicating the data or reference signal that is transmitted,

is a diagonal matrix, beta is a power adjustment factor,

or

Or

And W is a linear precoding matrix.

wherein s ═ s(s)₁,s₂,…,s_L)^TWhich is indicative of the data being transmitted,

is a diagonal matrix, beta is a power adjustment factor,

or

Or

Representing a first factor corresponding to the kth spatial layer, the Q and B matrices being related to the channel matrix H, d ═ d (d)₁,d₂,…,d_L)^Tτ is the modulus operation parameter for the perturbation vector due to the modulus operation.

In one possible implementation, the process of precoding the data by the second factor is:

is a diagonal matrix, beta is a power adjustment factor,

or

Or

Representing a second factor corresponding to the kth spatial layer, the Q and B matrices being related to the channel matrix H, d ═ d (d)₁,d₂,…,d_L)^Tτ is the modulus operation parameter for the perturbation vector due to the modulus operation.

In one possible implementation, the precoding the reference signal by the second factor is as follows:

Or the following steps:

wherein s ═ s(s)₁,s₂,…,_L)^TWhich is indicative of the reference signal being transmitted,

is a diagonal matrix, alpha is a power adjustment factor,

or

Or

Representing the second factor corresponding to the k-th spatial layer, the Q and B matrices are related to the channel matrix H.

In a possible implementation, the terminal device may further receive at least one second reference signal that is precoded, where a second time-frequency resource and a second space resource are associated with a second reference signal, data on the second time-frequency resource and the second space resource are associated with a second factor, the second factor is a scalar for precoding the data associated with the second factor, the second time-frequency resource includes one or more frequency-domain resource groups, and the second space resource includes one or more space layers; the terminal device may further receive at least one first reference signal that is precoded, wherein one first reference signal is precoded based on a first information, one first information is associated with a first factor, and one first information is associated with a second time-frequency resource and a second space resource; the terminal device may also detect, based on a second reference signal, data on a second time-frequency resource and a second spatial resource associated with the second reference signal; the specific implementation manner of the terminal device detecting the data on the first time-frequency resource and the first space resource is as follows: and detecting data pre-coded based on a first factor related to the first information based on a target reference signal in at least one second reference signal and the first reference signal pre-coded by the first information, wherein a second time-frequency resource and a second space resource related to the target reference signal are a second time-frequency resource and a second space resource related to the first information. Based on the possible implementation manner, the first information is carried through the reference signal, and the first information is not indicated through extra signaling, which is beneficial to saving the overhead of the indication signaling.

In a possible implementation, the terminal device may further receive indication information sent by the network device, where the indication information is used to indicate the at least one first factor; the terminal device may further receive at least one reference signal after precoding, where a second time-frequency resource and a second space resource are associated with one reference signal, data on the second time-frequency resource and the second space resource are associated with a second factor, the second factor is a scalar and is used to precode the data associated with the second factor, the second time-frequency resource includes one or more frequency-domain resource groups, and the second space resource includes one or more space layers; the terminal device may also detect, based on the reference signal, data on a second time-frequency resource and a second spatial resource associated with the reference signal; the specific implementation manner of the terminal device detecting the data on the first time-frequency resource and the first space resource is as follows: data precoded based on the first factor is detected based on the first factor. Based on the possible implementation mode, the first factor can be indicated through the indication information, and the second factor is carried through the reference signal, so that the overhead of indication signaling is saved, and the precision of the factor is finer.

In a possible implementation, the terminal device may further receive indication information sent by the network device, where the indication information is used to indicate the at least one first factor; the specific implementation manner of the terminal device detecting the data on the first time-frequency resource and the first space resource is as follows: data pre-coded based on the first factor is detected based on the first factor. Based on the possible implementation manner, the network device does not need to indicate one first factor for each RE and each spatial layer, which is beneficial to saving the overhead of the indication signaling of the indication information.

Optionally, the at least one first factor indicated by the indication information is a factor in a factor set.

Alternatively, the set of factors may also be referred to as a set of candidate factors or a set of quantization factors. The factor combination may be quantized by the network device and the terminal device based on Q bits, Q being an integer greater than 0. Factor set including N-2^QA first factor. Q may be predefined by a protocol, or notified to the terminal device by the network device, or implicitly indicated by some rule. Or the network device quantizes the Q bits to obtain the factor combination and configures the factor combination to the terminal device. Alternatively, the set of factors may be protocol pre-specified.

Optionally, each factor in the factor set may correspond to a factor index, and the indication information may specifically indicate the first factor index. Or, each factor in the factor set corresponds to a parameter value used for determining the factor, and the indication information may specifically indicate an index of the parameter value.

Optionally, the first spatial resource includes a spatial layer, the at least one first factor is a factor in a quantization codebook, the quantization codebook includes P factor vectors, each factor vector is a vector of the quantization codebook, each factor vector includes N factors, the factors of each factor vector are associated with a reference signal port one by one, and P and N are integers greater than zero; the indication information carries an index of the factor vector, that is, the indication information indicates the first factor through the index of the factor vector; the terminal device may determine the first factor from the quantization codebook based on an index of a factor vector carried by the indication information and a reference signal port allocated for the terminal device. In this possible implementation, by presetting a factor vector (or called a factor combination), the granularity of the first factor in the spatial dimension can be made finer, and by indicating the index of one factor vector, a plurality of first factors can be indicated, which can greatly save the overhead of the indication signaling.

In one possible implementation, the terminal device may further receive at least one reference signal that is precoded, one first time-frequency resource and one first space resource being associated with one reference signal; the specific implementation manner of the terminal device detecting the data on the first time-frequency resource and the first space resource is as follows: data on a first time-frequency resource and a first spatial resource is detected based on a reference signal associated with the first time-frequency resource and the first spatial resource. Based on the possible implementation mode, the network equipment does not need to indicate factors adopted by the terminal equipment for precoding the downlink data through the signaling, and the cost of indicating the signaling is saved.

Optionally, one RB includes a plurality of first time-frequency resources. By dividing an RB into a plurality of first time-frequency resources, the first time-frequency resources only contain fewer time-frequency resources. Different first time-frequency resources correspond to different first factors, and fine factor adjustment is facilitated, so that power efficiency brought by the factors is improved as much as possible.

Optionally, the reference signals corresponding to different first time-frequency resources may be the same type of reference signal, or may be different types of reference signals. A reference signal includes all reference signal symbols corresponding to the same first factor.

Optionally, the reference signal associated with the first time-frequency resource and the first spatial resource is precoded based on a first factor associated with the first time-frequency resource and the data on the first spatial resource.

In a second aspect, the present application provides a data detection method, including: the network equipment precodes data on the first time-frequency resource and the first space resource based on the first factor, and sends the precoded data on the first time-frequency resource; data on a first time-frequency resource and a first spatial resource is associated with a first factor, different first time-frequency resources and data on the first spatial resource are associated with independently determined first factors, the first factors are scalars used for precoding data associated with the first factors, a first time-frequency resource comprises one or more frequency-domain resource groups, and a first spatial resource comprises one or more spatial layers.

In one possible implementation, the network device precodes at least one reference signal, and sends the precoded at least one reference signal to the terminal device, where a second time-frequency resource and a second space resource are associated with one reference signal, data on the second time-frequency resource and the second space resource are associated with a second factor, the second factor is a scalar and is used for precoding the data associated with the second factor, a second time-frequency resource includes one or more frequency-domain resource groups, and a second space resource includes one or more space layers; the network device precodes data on the second time frequency resource and the second space resource based on the second factor, and transmits the precoded data on the second time frequency resource.

In a possible implementation, the network device sends indication information to the terminal device, the indication information indicating at least one first information, one first information being related to one first factor, one first information being associated with one second time-frequency resource and one second spatial resource.

In one possible implementation, the second factor associated with the data on the second time-frequency resource and the second spatial resource is further used for precoding reference signals associated with the second time-frequency resource and the second spatial resource.

In a possible implementation, a first factor is associated with one or more second factors, and a first information is related to a first factor and a second factor with which the first factor is associated.

In a possible implementation, the first information is a difference between the first factor and a second factor associated with the first factor, or the first information is a quotient between the first factor and a second factor associated with the first factor.

In one possible implementation, the first factor relates to one or more of the following items of information: the data on the first time-frequency resource, a first channel matrix corresponding to the first time-frequency resource or a first pre-coding matrix corresponding to the first time-frequency resource;

The second factor relates to one or more of the following: data on the second time frequency resource, a reference signal associated with the second time frequency resource, a second channel matrix corresponding to the second time frequency resource, or a second precoding matrix corresponding to the second time frequency resource. The data on the first time-frequency resource may be transmission data symbols on all corresponding spatial layers on the first time-frequency resource. The data on the second time frequency resource may be transmission data symbols on all corresponding spatial layers on the second time frequency resource. The reference signals associated with the second time-frequency resource may be reference signal symbols corresponding to all spatial layers corresponding to the second time-frequency resource.

In one possible implementation, there are one or more sets of time-frequency resources, one set of time-frequency resources comprising one or more first time-frequency resources and one or more second time-frequency resources.

In one possible implementation, the first time-frequency resource includes time-domain resources that are different from the time-domain resources included in the second time-frequency resource.

In one possible implementation, the first time-frequency resource includes frequency-domain resources that are different from frequency-domain resources included in the second time-frequency resource.

In one possible implementation, the number of the first time-frequency resources and/or the number of the second time-frequency resources are predefined by a protocol; or before the network device sends the indication information to the terminal device, the network device may also send configuration information to the terminal device, where the configuration information is used to configure the number of the first time-frequency resources and/or the number of the second time-frequency resources. Based on the possible implementation mode, the notification number of the first information is guaranteed to be fixed, and therefore fixed signaling overhead is guaranteed. Therefore, the terminal equipment only needs to detect the indication information with fixed bit length, thereby being beneficial to reducing the blind detection times, reducing the processing complexity and the processing time delay of the terminal equipment and saving the power consumption of the terminal equipment.

Optionally, the network device determines, based on the time-frequency resource of the downlink data scheduled by the network device, the number of the first time-frequency resources, and/or the number of the second time-frequency resources, the time-frequency resource included in each first time-frequency resource and/or the time-frequency resource included in each second time-frequency resource. Based on the optional implementation manner, the network device can accurately determine the time-frequency resources included in each first time-frequency resource and the time-frequency resources included in each second time-frequency resource based on a preset rule.

In one possible implementation, the number of frequency domain resources (or the bandwidth of the second time frequency resource in the frequency domain) included in the second time frequency resource is protocol-specific or configured by the network device. For example, the second time-frequency resource may include 1 PRG as the number of frequency-domain resources. Optionally, the network device may divide one or more second time-frequency resources in the scheduled time-frequency resources according to a preset second time-frequency resource division method based on the number of frequency-domain resources included in the second time-frequency resources.

In a possible implementation, the number of frequency domain resources included in the first time frequency resource may also be specified by a protocol or configured by a network device. For example, the first time-frequency resource may include 1 PRG as the number of frequency-domain resources. Optionally, the network device may divide one or more first time-frequency resources in the scheduled time-frequency resources according to a preset first time-frequency resource dividing method based on the number of frequency-domain resources included in the first time-frequency resources.

In a possible implementation, when one or more time-frequency resource sets are available, the number of the time-frequency resource sets and/or the number of first time-frequency resources included in the time-frequency resource sets and/or the number of second time-frequency resources included in the time-frequency resource sets are predefined by a protocol; or, when there are one or more time-frequency resource sets, before the network device sends the indication information, the network device may further send configuration information to the terminal device, where the configuration information is used to configure the number of the time-frequency resource sets and/or the number of the first time-frequency resources included in the time-frequency resource set and/or the number of the second time-frequency resources included in the time-frequency resource set.

Optionally, the network device determines, based on the time-frequency resources of the downlink data scheduled by the network device, the number of the time-frequency resource sets and/or the number of the first time-frequency resources included in the time-frequency resource sets and/or the number of the second time-frequency resources included in the time-frequency resource sets, the time-frequency resources included in the first time-frequency resources in each time-frequency resource set and/or the time-frequency resources included in the second time-frequency resources.

In one possible implementation, the number of space resources is pre-specified by the protocol; or, before the network device sends the indication information, the network device may also send configuration information to the terminal device, where the configuration information is used to configure the number of space resources.

Optionally, the network device determines the spatial layers included in the spatial resources based on the number of spatial layers of the terminal device and the number of spatial resources.

is a diagonal matrix, beta is a power adjustment factor,

or

Or

And W is a linear precoding matrix.

Wherein s is(s)₁,s₂,…,s_L)^TIndicating the data or reference signal that is transmitted,

is a diagonal matrix, beta is a power adjustment factor,

or

Or

And W is a linear precoding matrix.

is a diagonal matrix, beta is a power adjustment factor,

or

Or

is a diagonal matrix, beta is a power adjustment factor,

or

Or

or the following steps:

wherein s ═ s(s)₁,s₂,…,s_L)^TWhich is indicative of the reference signal being transmitted,

is a diagonal matrix, alpha is a power adjustment factor,

Or

Or

In a possible implementation, the network device may further precode at least one second reference signal, and transmit the precoded at least one second reference signal to the terminal device, where a second time-frequency resource and a second space resource are associated with the second reference signal, data on the second time-frequency resource and the second space resource are associated with a second factor, the second factor is a scalar for precoding the data associated with the second factor, the second time-frequency resource includes one or more frequency-domain resource groups, and the second space resource includes one or more space layers; the network device may also precode at least one first reference signal, and transmit the precoded at least one first reference signal to the terminal device, wherein a first reference signal is precoded based on a first information, a first information is associated with a first factor, and a first information is associated with a second time-frequency resource and a second space resource; the network device may also precode data on the second time-frequency resource and the second space resource based on the second factor, and transmit the precoded data on the second time-frequency resource.

In a possible implementation, the network device may further send indication information to the terminal device, where the indication information is used to indicate the at least one first factor; the network device may also precode at least one reference signal, and send the precoded at least one reference signal to the terminal device, where a second time-frequency resource and a second space resource are associated with one reference signal, data on the second time-frequency resource and the second space resource are associated with a second factor, the second factor is a scalar and is used for precoding the data associated with the second factor, where one second time-frequency resource includes one or more frequency-domain resource groups, and one second space resource includes one or more space layers; the network device may also precode data on a second time-frequency resource and a second spatial resource based on a second factor, and transmit the precoded data on the second time-frequency resource, where one second time-frequency resource and one second spatial resource are associated with one second factor.

In one possible implementation, the network device may further send indication information to the terminal device, where the indication information is used to indicate the at least one first factor.

Alternatively, the set of factors may also be referred to as a set of candidate factors or a set of quantization factors. The factorThe set may be quantized by the network device and the terminal device based on Q bits, Q being an integer greater than 0. Factor set including N-2^QA first factor. Q may be predefined by a protocol, or notified to the terminal device by the network device, or implicitly indicated by some rule. Or the network device quantizes the Q bits to obtain the factor combination and configures the factor combination to the terminal device. Alternatively, the set of factors may be protocol pre-specified.

Optionally, each first factor in the factor set may correspond to a first factor index, and the indication information may specifically indicate the first factor index. Or, each first factor in the factor set corresponds to a parameter value used for determining the first factor, and the indication information may specifically indicate an index of the parameter value.

Optionally, the first spatial resource includes a spatial layer, the at least one first factor is a first factor in a quantization codebook, the quantization codebook includes P factor vectors, each factor vector is a vector of the quantization codebook, each factor vector includes N first factors, the first factor of each factor vector is associated with a reference signal port one by one, and P and N are integers greater than zero; the indication information carries an index of the factor vector, i.e. the indication information indicates the first factor by the index of the factor vector.

In a possible implementation, the network device may also precode at least one reference signal, and send the precoded at least one reference signal to the terminal device, where one first time-frequency resource and one first space resource are associated with one reference signal.

Optionally, one RB includes a plurality of first time-frequency resources.

In a third aspect, the present application provides a communication apparatus, which may be a terminal device, an apparatus in a terminal device, or an apparatus capable of being used in cooperation with a terminal device. Wherein, the communication device can also be a chip system. The communication device may perform the method of the first aspect. The functions of the communication device can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units corresponding to the above functions. The unit may be software and/or hardware. The operations and advantageous effects performed by the communication device may refer to the method and advantageous effects described in the first aspect, and repeated details are not repeated.

In a fourth aspect, the present application provides a communication apparatus, which may be a network device, an apparatus in a network device, or an apparatus capable of being used in cooperation with a network device. The communication device can also be a chip system. The communication device may perform the method of the second aspect. The functions of the communication device can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units corresponding to the above functions. The unit may be software and/or hardware. The operations and advantageous effects performed by the communication device may refer to the method and advantageous effects described in the second aspect, and repeated details are not repeated.

In a fifth aspect, the present application provides a communication device comprising a processor, wherein the method according to the first or second aspect is performed when the processor invokes a computer program in a memory.

In a sixth aspect, the present application provides a communications apparatus comprising a processor and a memory for storing computer-executable instructions; the processor is configured to execute computer-executable instructions stored by the memory to cause the communication device to perform the method of the first or second aspect.

In a seventh aspect, the present application provides a communication device comprising a processor, a memory, and a transceiver for receiving a channel or signal or transmitting a channel or signal; the memory is used for storing program codes; the processor is configured to call the program code from the memory to perform the method according to the first aspect or the second aspect.

In an eighth aspect, the present application provides a communication device comprising a processor and an interface circuit, the interface circuit configured to receive code instructions and transmit the code instructions to the processor; the processor executes the code instructions to perform a method according to the first or second aspect.

In a ninth aspect, the present application provides a computer-readable storage medium for storing instructions that, when executed, cause a method as in the first or second aspect to be implemented.

In a tenth aspect, the present application provides a computer program product comprising instructions that, when executed, cause a method as in the first or second aspect to be implemented.

Drawings

Fig. 1 is a flowchart of a THP precoding process in the prior art;

fig. 2 is a flow chart of a conventional factor-based THP precoding process;

FIG. 3 is a flow chart of a conventional factor-based linear precoding process;

fig. 4 is a schematic diagram of a communication system provided in an embodiment of the present application;

fig. 5 is a schematic flowchart of a data detection method according to an embodiment of the present application;

fig. 6 is a schematic diagram of a first time-frequency resource and a space resource provided in an embodiment of the present application;

fig. 7 is a schematic diagram of another first time-frequency resource and space resource provided in an embodiment of the present application;

fig. 8 is a schematic diagram of a first time-frequency resource and a space resource provided in an embodiment of the present application;

fig. 9 is a schematic diagram of a first time-frequency resource and a space resource provided in an embodiment of the present application;

fig. 10 is a schematic diagram of a first time-frequency resource and a space resource provided in an embodiment of the present application;

FIG. 11 is a schematic flow chart diagram illustrating another data detection method provided by embodiments of the present application;

FIG. 12 is a diagram of a quantization codebook according to an embodiment of the present application;

FIG. 13 is a schematic flow chart diagram illustrating a further data detection method provided in an embodiment of the present application;

Fig. 14a is a schematic diagram of a first time-frequency resource and a second time-frequency resource provided in an embodiment of the present application;

fig. 14b is a schematic diagram of another first time-frequency resource and a second time-frequency resource provided in the embodiment of the present application;

fig. 15 is a schematic diagram of a first time-frequency resource and a second time-frequency resource according to another embodiment of the present application;

fig. 16 is a schematic diagram of a first time-frequency resource and a second time-frequency resource provided in an embodiment of the present application;

fig. 17 is a schematic diagram of a first time-frequency resource and a second time-frequency resource according to another embodiment of the present application;

fig. 18 is a schematic diagram of a first time-frequency resource and a second time-frequency resource provided in an embodiment of the present application;

fig. 19 is a schematic diagram of another first time-frequency resource and a second time-frequency resource provided in the embodiment of the present application;

fig. 20 is a schematic diagram of a first time-frequency resource and a second time-frequency resource according to another embodiment of the present application;

fig. 21 is a schematic diagram of a first time-frequency resource and a second time-frequency resource provided in an embodiment of the present application;

fig. 22 is a schematic diagram of a time-frequency resource set according to an embodiment of the present application;

fig. 23 is a schematic diagram of another time-frequency resource set provided in the embodiment of the present application;

FIG. 24 is a schematic flow chart diagram illustrating a further data detection method provided by an embodiment of the present application;

fig. 25 is a schematic diagram of a first time-frequency resource and a space resource provided in an embodiment of the present application;

fig. 26a is a schematic diagram of a first time-frequency resource and a second time-frequency resource provided in an embodiment of the present application;

fig. 26b is a schematic diagram of another first time-frequency resource and a second time-frequency resource provided in the embodiment of the present application;

FIG. 27 is a schematic flow chart diagram illustrating a further data detection method provided in an embodiment of the present application;

fig. 28 is a schematic diagram of a first time-frequency resource and a second time-frequency resource according to another embodiment of the present application;

FIG. 29 is a schematic flow chart diagram illustrating a further data detection method provided in an embodiment of the present application;

fig. 30 is a schematic diagram of a first time-frequency resource and a second time-frequency resource provided in an embodiment of the present application;

fig. 31 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 32a is a schematic structural diagram of another communication device provided in the embodiment of the present application;

fig. 32b is a schematic structural diagram of another communication device according to an embodiment of the present application.

Detailed Description

The terms "first" and "second," and the like in the description, claims, and drawings of the present application are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In this application, "at least one" means one or more, "a plurality" means two or more, "at least two" means two or three and three or more, "and/or" for describing an association relationship of associated objects, which means that there may be three relationships, for example, "a and/or B" may mean: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural. For vector or matrix A, its transposed vector or transposed matrix is denoted A ^TThe conjugate transpose vector or the conjugate transpose matrix of which is denoted as A^H。

For better understanding of the embodiments of the present application, the following first introduces related concepts related to the embodiments of the present application:

one, space layer

For a spatial multiplexing Multiple Input Multiple Output (MIMO) system, multiple parallel data streams can be transmitted simultaneously on the same frequency domain resource, and each data stream is referred to as a spatial layer or a spatial stream, which may also be referred to as a layer or a stream for short.

Second, precoding resource block group (PRG)

In the MIMO system, the network device may process data to be transmitted by using a MIMO precoding (precoding) technique to improve signal transmission quality or rate. PRG refers to a frequency domain granularity at which network devices perform precoding using the same precoding matrix, and may include one or more Resource Blocks (RBs) in succession. For example, one PRG may be 2 RBs or 4 RBs or full bandwidth. For all time-frequency resources contained in one PRG, when the network device sends data (such as PDSCH signals) and sends demodulation reference signals (DMRSs), the same precoding matrix is used for precoding. Correspondingly, the terminal equipment assumes that the same precoding matrix is corresponding to the data and the demodulation reference signal in one PRG.

For example, PRG is defined in the standard as follows: the terminal device assumes that the basic granularity for precoding by the network device is P RBs which are consecutive in the frequency domain. The value of P may be {2, 4, full bandwidth }. If the value of P is full bandwidth, downlink data scheduling can not support the scheduling of discontinuous PRBs, and the same precoding matrix and precoding processing mode are adopted for the scheduled time-frequency resources. If P is 2 or 4, the bandwidth part (BWP) i will divide PRGs with consecutive P PRBs as basic granularity, and each PRG may contain 1 or more PRBs. (A UE mayy aggregate that compressing granularity is P'_BWP.i consecutive resource blocks in the frequency domain.P′_BWP.i canbe equal to one of the values among{2,4,wideband}.If P′_BWP.iis determined as"wideband",the UE is not expected to be scheduled with non-contiguous PRBs and the UE may assume that the same precoding is applied to the allocated resource.IfP′_BWP.i is determined as one of the values among{2,4},Precoding Resource Block Group(PRGs)partitions the bandwidth part i with P′_BWP.i consecutive PRBs.Actual number of consecutive PRBs in each PRG could be one or more.The UE may assume the same precoding is applied for any downlink contiguous allocation of PRBs in a PRG.)

Tri, THP (tomlinson-harashinma precoding) precoding

MIMO precoding techniques can be classified into linear precoding and nonlinear precoding, depending on the way of signal processing. The nonlinear precoding can approach the theoretical channel capacity through nonlinear operations such as interference elimination and modulus calculation at the sending end, and the system performance under the scene of channel correlation is obviously improved. Accordingly, processing complexity is greatly increased due to the introduction of nonlinear operations. The THP algorithm is a nonlinear precoding scheme that trades off system performance against complexity. Due to the advantages of low complexity, low system performance loss and the like, the method is widely researched and applied.

Fig. 1 is a flowchart of a THP precoding process. As shown in fig. 1, the THP precoding process includes a non-linear processing stage and a linear processing stage. Suppose that K users perform multi-user transmission, and each user correspondingly transmits a symbol vector

Middle L_kIndicating the number of spatial layers transmitted by the kth user. s_k,l(l∈[1,L_k]) Represents the symbol transmitted by the ith spatial layer of the kth user. The network device sends symbol vector s ═ s(s) to multiple users in the nonlinear processing stage₁,s₂,…,s_K)^TInterference cancellation is performed and in order to avoid the interference cancellation operation causing the transmit power to be unlimited, a modulo operation is also performed after the interference cancellation operation. The modulo operation results in a transmitted symbol vector x ═ x₁,x₂,…,x_K)^T. Then the network device carries out linear processing on the sending symbol vector x and sends the symbol obtained by the linear processing to the terminal device. For convenience of presentation, the total number of transmission space layers of K users is

We re-index each element in the multi-user transmitted symbol vector s, denoted as s ═ s₁,s₂,…,s_L)^T. Similarly, the symbols are transmittedEach element in the vector x is re-indexed by (x ═ x)₁,x₂,…,x_L)^T。

For example, on the network device side (i.e., the transmitting end), for the l-th spatial layer formed by all users, s is set_lAfter nonlinear processing, the output transmission symbol x _lCan be expressed as:

wherein ,B_l，iAnd (3) representing the corresponding element of the ith row and the ith column of the feedback matrix B. The feedback matrix B may be expressed as B-GR^H. The matrix R is the complete channel matrix through all users

Is obtained by QR decomposition of the conjugate transpose of (A), H^HQR. Wherein H_kRepresenting a channel matrix corresponding to the k-th user with a dimension of N_R,k×N_T。N_R,kRepresenting the number of receive antennas, N, of the k-th user_TIndicating the number of transmit antennas of the network device. The matrix G is a diagonal matrix whose main diagonal elements are the inverse of the main diagonal elements of the matrix R, i.e.

wherein ,

the corresponding element in the ith row and ith column of the matrix G is shown.

In the formula (1), the first and second groups,

represents the transmission symbol s_lAnd carrying out interference elimination. Transmitted symbols s of the ith spatial layer due to the kth user_k,lAll the spatial layers of the previous k-1 users and the interference items corresponding to the previous l-1 spatial layers of the users are superposed

This may result in a significant increase in transmit power after THP precoding such that the transmit power is no longer limited. In order to limit the transmission power, as shown in formula (1), the transmission power may be limited

A mold operation is performed. Mod in equation (1)_τX denotes the modulo operation, for a given modulo operation parameter tau,

d_lrepresenting the rounded portion resulting from the modulo operation.

Through the above non-linear operation, the resulting transmit symbol vector x can be represented as:

x＝B^-1(s+dτ)＝B^-1v (2)

Wherein d is (d)₁,d₂,…,d_L)^TIs a perturbation vector due to the modulo operation. (v) where v is₁,v₂,...,v_L)^T，v_l＝s_l+d_lτ，l＝1,2,…,L。

After the non-linear step, a linear process is achieved by multiplying by a unitary matrix Q. And since the modulo operation in the nonlinear processing process brings the modulo loss, in order to reduce the modulo loss, the power back-off operation can be performed by the power normalization factor β after the nonlinear processing. The vector of transmitted symbols obtained after the linear processing operation and the power back-off operation can be represented as:

that is, in order to limit the transmission power, a modulo operation and a power backoff operation are performed in the THP precoding process.

On the terminal device side (i.e., receiving end), the joint received symbol vector of all users can be represented as:

where H is the channel matrix. n is channel noise, G^-1For the diagonal matrix, G and β are as described previously.

Due to G^-1For the diagonal matrix, it can be seen from equation (4) that each spatial layer has no interference of other spatial layers in the ideal case. The data symbols received by the terminal device corresponding to the ith spatial layer can be represented as:

wherein ,g_llIs a diagonal matrix G^-1The element corresponding to the ith row and the ith column in the middle. y is_lAnd receiving symbols of the terminal equipment corresponding to the ith spatial layer. n is _lThe noise corresponding to the ith spatial layer. Due to G^-1The method is a diagonal matrix, therefore, multi-user interference and multi-antenna interference are eliminated through THP precoding, and an MU-MIMO channel is converted into parallel multi-path sub-channels. For the ith spatial layer of the kth user, based on equation (5), the received signal can be expressed as:

wherein g_k,lAnd the equivalent channel coefficient corresponding to the ith spatial layer of the kth user is represented. For the l spatial layer, the k terminal device estimates the equivalent channel coefficient by using the reference signal

Then, based on the received symbol y_k,lAnd

and determining the symbols sent by the network equipment.

Four, factor-based THP precoding

The above describes that in order to limit the transmit power, the modulo operation and power are performed during the THP precoding processAnd (5) backing off operation. However, the mode operation causes mode loss, and the power back-off operation causes power loss. In order to reduce the mode loss and the power loss, the embodiment of the application provides factor-based THP precoding. The factor may also be referred to as a phase factor throughout the embodiments of the present application. Factor-based THP precoding may also be referred to as rotating phase THP precoding, or phase factor rotated THP precoding, or transmit signal rotated THP precoding. As shown in fig. 2, in the THP precoding technique based on factors, the superimposed interference signal corresponding to each spatial layer is phase-rotated by the factors, so that the significant increase of the superimposed interference signal to the signal power is reduced. The same factor is then used for phase compensation after the modulo operation. For example, for the ith spatial layer corresponding to all terminal devices, the corresponding factor may be θ _lOr

Or

Or j θ_l. Hereinafter by a factor of

For example. Corresponding to equation (1), the transmission symbol after the nonlinear processing can be represented as:

similar to equation (2), written in the form of a matrix, the non-linearly processed transmit signal can be expressed as:

x＝B^-1T(s+dτ)＝B^-1Tv (7)

the factor corresponding to each spatial layer may be selected based on a maximum transmit power criterion or a minimum power loss criterion, e.g.

Or

Q may be 0,2), or a combination of quantized factors.

After the non-linear step, a linear process is achieved by multiplying by the unitary matrix Q. And since the modulo operation in the nonlinear processing process brings the modulo loss, in order to reduce the modulo loss, the power back-off operation can be performed by the power normalization factor β after the nonlinear processing. Thus, the process of THP precoding data based on factors can be expressed as:

wherein ,

in the form of a diagonal matrix,

the factor representing the ith main diagonal element corresponding to the ith spatial layer. Where j is the imaginary unit, satisfying j²The same applies hereinafter to-1, and will not be described further hereinafter. By selecting an appropriate factor vector T, the rise of the transmission power can be limited to a large extent to reduce the power loss and the mode loss. Accordingly, the data symbol vector received by all terminal devices can be represented as:

Due to G^-1And T is a diagonal matrix, it can be seen based on equation (9) that each spatial layer has no interference of other spatial layers in an ideal case. The data symbols received on the ith spatial layer for the kth terminal device may be represented as:

wherein ,g_k,land the equivalent channel coefficient corresponding to the ith spatial layer of the kth terminal device is shown. g_k,lIs a diagonal matrix G^-1And the element corresponding to the ith spatial layer of the kth terminal device. It can be seen that for factor-based THP precoding, the terminal device needs to know the factor used by the network device for precoding

Correct data detection can be accomplished.

Factor-based linear precoding

In order to reduce data transmission power and improve data transmission performance, the embodiment of the application provides factor-based linear precoding. For example, the linear precoding may include any one of the following: zero-forcing (ZF) precoding, regular zero-forcing (RZF) precoding, eigenzero-forcing (EZF) precoding, or minimum mean-square error (MMSE) precoding. The factor-based linear precoding may also be referred to as a rotated phase linear precoding, or a phase factor rotated linear precoding, or a transmitted signal rotated linear precoding.

Fig. 3 is a diagram of a factor-based linear precoding. In the technique of the factor-based linear precoding, a phase rotation is performed on a transmission modulation symbol corresponding to each spatial layer by a factor, followed by a linear precoding operation. The process of linear pre-coding data based on factors is as follows:

where x represents the vector of precoded data symbols. Beta is a power adjustment factor. W is a linear precoding matrix.

For the diagonal matrix, the kth main diagonal element corresponds to a factor of the kth spatial layer. Through the selection of the optimal factor T, the power adjustment can be realizedThe value of the factor beta is small, thereby reducing the power loss due to power backoff.

The factor corresponding to each spatial layer can be selected based on a criterion of maximizing transmit power or minimizing power loss, i.e.

Or may be selected based on a criterion that maximizes the sum of received SINRs, i.e.

Or based on a criterion of maximizing the average received SINR, i.e.

Or based on a criterion of maximizing the minimum received SINR, i.e.

Q may be 0,2), or a combination of quantized factors. SINR_lIndicating the received SINR for the ith spatial layer.

Taking the factor-based EZF precoding as an example, assume that the number of transmit antennas in the network device is N _TThe total K terminal devices carry out MU-MIMO transmission, and the number of corresponding transmission streams of each terminal device is L_kThen total number of transmission streams

wherein ,L_kIt may also be greater than or equal to 1, and the number of transmission streams corresponding to each terminal device may be the same or different, and here, the number of transmission streams corresponding to each terminal device is taken as an example. The channel matrix of the kth terminal device is H_kIts corresponding maximum L_kThe feature vector corresponding to each feature value is

wherein V_kDimension of (A) is N_T×L_kIs the channel matrix is H_kObtained by performing SVD decomposition or EVD decomposition, i.e. satisfying

If the linear precoding employs EZF algorithm, the linear precoding matrix can be expressed as:

W＝V(V^HV+δI)^-1 (12)

wherein

Corresponding from K terminal devices

Spliced matrix with dimension N_TL is multiplied by L. Delta is an adjustment factor, which is related to the signal-to-noise ratio. In a method of implementation

wherein

Which is indicative of the power of the noise,

representing the transmit signal power. I is an L by L identity matrix. According to the transmitted signal s ═ s(s)₁,s₂,…,s_K)^TOf a channel matrix

And a linear precoding matrix W ═ W₁ … W_K]Determining the optimal factor corresponding to the ith spatial layer of the kth terminal device

The factor may also be θ_k,lOr

Or

Or j θ_k,lHere by a factor of

For example. Wherein the kth terminal device correspondingly transmits a symbol vector

s_k,l(l∈[1,L_k]) The symbol representing the ith spatial layer transmission of the kth terminal device. W_kA sub-matrix included in the precoding matrix W represents a precoding matrix corresponding to the kth terminal device, and the dimension of the precoding matrix is N_T×L_k. f (s, H, W) represents a factor

Is determined in relation to the transmitted signal s, all terminal device channel matrix H and the precoding matrix W.

The data symbol vectors received by all terminal devices at the receiving end can be represented as:

wherein for the kth terminal device, the received data symbol vector may be represented as:

wherein, T ═ diag (T)₁,T₂,…,T_K)。

Is dimension L_k×L_kRepresents a factor matrix corresponding to the kth terminal device, theta_k,lOr

Or

Or j θ_k，lAnd representing the factor corresponding to the ith spatial layer of the kth terminal device.

Interference caused by other K-1 paired terminal devices corresponding to the kth terminal device, n_kAnd representing the additive noise vector corresponding to the k terminal equipment. For the k terminal equipment, based on the equivalent channel matrix H_kW_kT_kDetection of transmission data is performed.

It can be seen that the terminal device needs to be based on the equivalent channel matrix H_kW_kAnd corresponding factor T_kAnd detecting data. Similarly, after other precoding methods use factors for precoding, the terminal device also needs to know the factors to detect data.

It is assumed that the network device signals the terminal device the factor by which the network device sends the data samples. Since the optimal factor is related to the transmitted symbols of the network device on the time-frequency resources and the spatial layer. Theoretically, for a Resource Element (RE), the transmission symbols of the network device on each spatial layer correspond to an optimal factor. However, if the network device notifies a factor for each RE for each spatial layer, this results in a large signaling overhead.

Therefore, in order to save signaling overhead of notifying a terminal device factor by a network device, the embodiment of the present application provides a data detection method and a communication device. In order to better understand the embodiments of the present application, the following description first describes the system architecture of the embodiments of the present application:

the method provided by the application can be applied to various communication systems, for example, an internet of things (IoT) system, a narrowband band internet of things (NB-IoT) system, a Long Term Evolution (LTE) system, a fifth generation (5th-generation, 5G) communication system, a hybrid architecture of LTE and 5G, a 5G New Radio (NR) system, a new communication system appearing in future communication development, and the like. The method provided by the embodiment of the present application may be adopted as long as the receiving parameters of the physical downlink channel need to be determined in the communication system.

Fig. 4 is a schematic architecture diagram of a communication system according to an embodiment of the present application, to which the solution of the present application is applicable. The communication system may comprise a network device and at least one terminal device, and fig. 4 exemplifies that the communication system comprises an access network device and a terminal device. As shown in fig. 4, the access network device and the terminal device may communicate with each other via a beam. Both the access network device and the terminal device are capable of generating multiple beams.

The access network device related in this embodiment is an entity for transmitting or receiving a signal on a network side, and may be configured to perform interconversion between a received air frame and an Internet Protocol (IP) packet, and serve as a router between the terminal device and the rest of the access network, where the rest of the access network may include an IP network and the like. The access network device may also coordinate management of attributes for the air interface. For example, the access network device may be an evolved Node B (eNB or e-NodeB) in LTE, a new radio controller (NR controller), a enode B (gNB) in 5G system, a centralized network element (centralized unit), a new radio base station, a radio remote module, a micro base station, a relay (relay), a distributed network element (distributed unit), a reception point (TRP) or a Transmission Point (TP), or any other radio access device, but the embodiment of the present invention is not limited thereto.

The terminal device referred to in the embodiments of the present application is an entity for receiving or transmitting signals at a user side. The terminal device may be a device providing voice and/or data connectivity to a user, e.g. a handheld device, a vehicle mounted device, etc. with wireless connection capability. The terminal device may also be other processing devices connected to the wireless modem. The terminal device may communicate with a Radio Access Network (RAN). A terminal device may also be referred to as a wireless terminal, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile), a remote station (remote station), an access point (access point), a remote terminal (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), a user device (user device), or a user equipment (user equipment, UE), among others. Alternatively, the terminal device may also be referred to simply as the user. The terminal equipment may be mobile terminals such as mobile telephones (or so-called "cellular" telephones) and computers with mobile terminals, e.g. portable, pocket, hand-held, computer-included or car-mounted mobile devices, which exchange language and/or data with a radio access network. For example, the terminal device may be a Personal Communication Service (PCS) phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), or the like. Common terminal devices include, for example: the mobile terminal includes a mobile phone, a tablet computer, a notebook computer, a handheld computer, a Mobile Internet Device (MID), and a wearable device, such as a smart watch, a smart bracelet, a pedometer, and the like, but the embodiment of the present application is not limited thereto.

The following describes in detail the data detection method provided in the embodiments of the present application:

referring to fig. 5, fig. 5 is a schematic flow chart of a data detection method according to an embodiment of the present disclosure. As shown in fig. 5, the data detection method includes the following steps 501 and 502. The subjects of execution of the method shown in fig. 5 may be a network device and a terminal device, or the subjects may be a chip in the network device and a chip in the terminal device. Fig. 5 illustrates an execution subject of the method by taking a network device and a terminal device as examples. The same principle is applied to the execution of the data detection method shown in other figures in the embodiment of the present application, and details are not described later. Wherein:

501. the network device precodes data on the first time-frequency resource and the first space resource based on the first factor, and transmits the precoded data on the first time-frequency resource.

The data on one first time-frequency resource and one first space resource are associated with one first factor, the data on different first time-frequency resources and first space resources are associated with independently determined first factors, the first factors are scalars and are used for precoding the data associated with the first factors, one first time-frequency resource comprises one or more frequency-domain resource groups, and one first space resource comprises one or more space layers.

There may be one or more first time-frequency resources, and there may also be one or more first spatial resources. The first number of time frequency resources may be fixed or non-fixed, and the first number of space resources may be fixed or non-fixed. Associating data on a first time-frequency resource and a first spatial resource with a first factor means: the network device may precode the data symbols with the same first factor on the same first time-frequency resource and the same first spatial resource. Throughout the embodiments of the present application, precoding data may be equivalent to preprocessing transmitted data symbols or data modulation symbols, for example, performing phase rotation on the transmitted data symbols or data modulation symbols.

The first factor determined independently by associating data on different first time-frequency resources and first space resources is: the first factor corresponding to one first time-frequency resource and one first space resource is not influenced by the first factors corresponding to other first time-frequency resources and first space resources, and is only related to one or more of a channel matrix, a precoding matrix and transmission data corresponding to the first time-frequency resource and the first space resource.

In an embodiment of the present application, a first time-frequency resource includes one or more frequency-domain resource groups, and a first spatial resource includes one or more spatial layers. The number of frequency-domain resource groups comprised by the different first time-frequency resources may be the same or different. The number of spatial layers comprised by the different first spatial resources may also be the same or different. A frequency-domain resource group refers to a set including a plurality of frequency-domain resources, for example, one frequency-domain resource group may be one or more subcarriers, or a plurality of REs, or one or more RBs, or one or more PRGs in the frequency domain. A first time-frequency resource comprising one or more groups of frequency-domain resources may be understood as: the length of a first time-frequency resource in the frequency domain is equal to the length of the frequency domain of one or more frequency-domain resource groups, or the bandwidth of a first time-frequency resource in the frequency domain is equal to the length of the frequency domain of one or more frequency-domain resource groups, or a first time-frequency resource in the frequency domain comprises one or more frequency-domain resource groups.

Optionally, one first time-frequency resource may further include one or more time units in the time domain, and one time unit may be one or more (orthogonal frequency division multiplexing, OFDM) symbols or one or more slots (slots). The number of time units comprised in the time domain for different first time frequency resources may be the same or different.

The first time-frequency resource can be divided into three ways:

dividing first time-frequency resources according to a frequency domain. That is, the frequency domain resources of different first time frequency resources are different, and the time domain resources of different first time frequency resources are the same.

And dividing the first time-frequency resource according to the time domain. That is, the time domain resources of different first time frequency resources are different, and the frequency domain resources of different first time frequency resources are the same.

And thirdly, dividing the first time-frequency resource according to the time domain and the frequency domain. That is, the frequency domain resources of different first time frequency resources are different, and the time domain resources of different first time frequency resources are also different.

The following further introduces the association relationship between the first time domain resource, the first spatial resource, the first time domain resource, and the data on the first spatial resource and the first factor, taking the division of the first time-frequency resource according to the frequency domain as an example:

example 1: taking the length of a first time domain resource in the frequency domain as the frequency domain length of a PRG, a first spatial resource includes a spatial layer as an example. As shown in fig. 6, it is assumed that there are 2 first time-frequency resources and 2 first spatial resources. Each first time-frequency resource includes a frequency domain length of one PRG in a frequency domain, and the frequency domain resource of each first time-frequency resource is different. In fig. 6, each lattice represents a PRG in the frequency domain dimension, and the same applies to fig. 7 to 10, which will not be described in detail later. The time domain resources of each first time frequency resource are the same, and each first time frequency resource comprises one or more time units in the time domain. Since the time domain resources of each first time-frequency resource are the same, fig. 6 only shows the frequency domain dimension and the spatial domain dimension, and does not show the time domain dimension, and fig. 7 to fig. 10 are the same, and will not be described in detail later. Each first spatial resource includes 1 spatial layer. Wherein the data on the first time-frequency resource 1 and the spatial layer 1 are associated with a factor of 1, i.e. the network device precodes the data on the first time-frequency resource 1 and the spatial layer 1 with the factor of 1. The data on the first time-frequency resource 2 and the spatial layer 1 are associated with a factor of 2, i.e. the network device precodes the data on the first time-frequency resource 2 and the spatial layer 1 with a factor of 2. The data on the first time-frequency resource 1 and the spatial layer 2 are associated with a factor of 3, i.e. the network device precodes the data on the first time-frequency resource 1 and the spatial layer 2 with a factor of 3. The data on the first time-frequency resources 2 and the spatial layer 2 are associated with a factor of 4, i.e. the network device precodes the data on the first time-frequency resources 2 and the spatial layer 2 with a factor of 4.

Example 2: taking the length of a first time domain resource in the frequency domain as the frequency domain length of a PRG, a first spatial resource includes a plurality of spatial layers as an example. As shown in fig. 7, it is assumed that there are 2 first time-frequency resources and 2 first space resources. Each first time-frequency resource includes a frequency domain length of one PRG in a frequency domain, and the frequency domain resource of each first time-frequency resource is different. Each first time-frequency resource comprises one or more time units in the time domain, and the time domain resources of each first time-frequency resource are the same. Each first spatial resource includes 2 spatial layers. The data on the first time-frequency resource 1 and the first space resource 1 are associated with a factor of 1, that is, the network device uses the factor of 1 to precode the data on the first time-frequency resource 1 and the first space resource 1. The data on the first time-frequency resource 2 and the first spatial resource 1 are associated with a factor of 2, i.e. the network device precodes the data on the first time-frequency resource 2 and the first spatial resource 1 with a factor of 2. The data on the first time-frequency resource 1 and the first space resource 2 are associated with a factor of 3, that is, the network device uses the factor of 3 to precode the data on the first time-frequency resource 1 and the first space resource 2. The data on the first time-frequency resource 2 and the first spatial resource 2 are associated with a factor of 4, i.e. the network device precodes the data on the first time-frequency resource 2 and the first spatial resource 2 with a factor of 4.

Example 3: taking the length of a first time domain resource in the frequency domain as the frequency domain length of a plurality of PRGs, a first spatial resource includes a spatial layer as an example. As shown in fig. 8, it is assumed that there are 2 first time-frequency resources and 2 first spatial resources. Each first time-frequency resource includes a frequency domain length of 4 PRGs in a frequency domain, and the frequency domain resource of each first time-frequency resource is different. Each first time-frequency resource comprises one or more time units in the time domain, and the time domain resources of each first time-frequency resource are the same. Each first spatial resource includes 1 spatial layer. Similarly, one first time-frequency resource and one first space resource are associated with one factor, which is not described herein.

Example 4: taking the example that one first time domain resource includes the frequency domain length of multiple PRGs in the frequency domain, and one spatial resource includes multiple spatial layers. As shown in fig. 9, it is assumed that there are 2 first time-frequency resources and 2 first spatial resources. Each first time-frequency resource includes a frequency domain length of 4 PRGs in a frequency domain, and the frequency domain resource of each first time-frequency resource is different. Each first time-frequency resource comprises one or more time units in the time domain, and the time domain resources of each first time-frequency resource are the same. Each first spatial resource includes 2 spatial layers. Similarly, one first time-frequency resource and one first space resource are associated with one factor, which is not described herein.

Example 5: for example, the number of PRGs included in different first time-frequency resources may be different, and the number of spatial layers included in different first spatial resources may be different. As shown in fig. 10, it is assumed that there are 2 first time-frequency resources and 2 first spatial resources. The first time-frequency resource 1 includes frequency domain lengths of 2 PRGs in the frequency domain, and the first time-frequency resource 2 includes frequency domain lengths of 4 PRGs in the frequency domain, and the frequency domain resource of each first time-frequency resource is different. Each first time-frequency resource comprises one or more time units in the time domain, and the time domain resources of each first time-frequency resource are the same. The first spatial resource 1 includes 1 spatial layer. The first spatial resource 2 includes 2 spatial layers. Similarly, one first time-frequency resource and one first space resource are associated with one factor, which is not described herein.

Assuming that the first time-frequency resources are divided according to the time domain, the frequency domain dimension shown in fig. 6 to 10 may be replaced by a time domain dimension, one lattice represents one or more OFDM symbols in the time domain dimension, and the frequency domain resources of the first time-frequency resources 1 and the first time-frequency resources 2 are the same.

In one possible implementation, the protocol may specify the number of first time-frequency resources and/or the number of first space resources in advance. Alternatively, the network device may also send configuration information to configure the number of first time-frequency resources and/or the number of first space resources. Accordingly, the terminal device may receive the configuration information. The configuration information may be Radio Resource Control (RRC) signaling or other signaling. That is, in this possible implementation, the number of the first time-frequency resources is fixed, and the number of the first time-frequency resources does not change with the change of the time-frequency resources of the downlink data scheduled by the network device. And/or the number of the first space resources is fixed, and the number of the first space resources does not change along with the change of the number of the space layers owned by the terminal equipment. Based on the possible implementation mode, the notification number of the guarantee factor is fixed, and therefore fixed signaling overhead is guaranteed. Therefore, the terminal equipment only needs to detect the indication information with fixed bit length, thereby being beneficial to reducing the blind detection times, reducing the processing complexity and the processing time delay of the terminal equipment and saving the power consumption of the terminal equipment.

Optionally, if the number of the first time-frequency resources is specified by the protocol, or the network device configures the number of the first time-frequency resources through the configuration information, the network device may further determine, based on the time-frequency resources of the downlink data scheduled by the network device and the number of the first time-frequency resources, the time-frequency resources included in each first time-frequency resource. Determining the time-frequency resources included in the first time-frequency resource may refer to determining REs, subcarriers, RBs, or PRGs included in the first time-frequency resource in a frequency domain, and determining OFDM symbols included in the first time-frequency resource in a time domain. Correspondingly, the terminal device may also determine the time-frequency resource included in each first time-frequency resource based on the time-frequency resource of the downlink data scheduled by the network device and the number of the first time-frequency resources. Based on the optional implementation manner, the network device and the terminal device can accurately determine the time-frequency resources included in the first time-frequency resources.

Optionally, if the protocol specifies the number of the first space resources, or the network device configures the number of the first space resources through the configuration information, the network device may further determine the space layer included in each first space resource based on the number of the space layers of the terminal device and the number of the first space resources. Accordingly, the terminal device determines the spatial layers included in each first spatial resource based on the number of spatial layers of the terminal device and the number of the first spatial resources. Based on the optional implementation manner, the network device and the terminal device can accurately determine the spatial layer included in the first spatial resource.

The division method of the first time-frequency resource may be a preset rule. Taking the example of dividing the first time-frequency resources according to the frequency domain, the frequency domain resources of different first time-frequency resources are different, and the time domain resources corresponding to different first time-frequency resources are the same. The frequency domain resources contained in the different first time frequency resources are equally divided as much as possible. Taking the basic granularity of the frequency domain resource contained in the first time-frequency resource as PRG as an example, it is assumed that the time-frequency resource of the downlink data scheduled by the network device includes N in the frequency domain_PDSCHThe number of the first time-frequency resources is S, and the first S-1 first time-frequency resources all comprise

PRG, S first time-frequency resource containing residual

And (4) PRG. The rule for dividing the first time-frequency resource according to the frequency domain is applicable to the basic particles of the frequency domain resource contained in the first time-frequency resourceThe degree is RB or RE, and the method is also suitable for time domain division and space domain division of the first time-frequency resources. This rule of dividing the first time-frequency resources in the frequency domain also applies to the division of the first spatial resources.

For example, if the network device configures the number of the first time-frequency resources to be S ═ 2 through the configuration information, the number of the first space resources is 2. The time frequency resource of the downlink data scheduled by the network equipment comprises N in the frequency domain _PDSCH8 PRGs, containing N in the time domain_t14 OFDM symbols. According to a preset division rule, for example, different first time-frequency resources have different frequency domain resources, and the different first time-frequency resources include frequency domain resources that are equally divided, and the time domain resources corresponding to the different first time-frequency resources are the same. The network equipment determines that each first time-frequency resource comprises

The PRGs, i.e., the first time-frequency resource 1, include PRGs 1 through 4 in the frequency domain, and the first time-frequency resource 2 includes PRGs 5 through PRGs 8 in the frequency domain. The first time-frequency resource 1 and the first time-frequency resource 2 occupy the same N in the time domain_t14 OFDM symbols. The number of the spatial layers corresponding to the terminal equipment is 2. According to a preset division rule, for example, the number of spatial layers included in different first spatial resources is the same. The network device determines that the first spatial resource 1 comprises a spatial layer 1 and the first spatial resource 2 comprises a spatial layer 2.

Correspondingly, the terminal equipment determines that the first time-frequency resource 1 comprises PRG 1-PRG 4 in the frequency domain, the first time-frequency resource 2 comprises PRG 5-PRG 8 in the frequency domain, and the first time-frequency resource 1 and the first time-frequency resource 2 occupy the same N in the time domain_t14 OFDM symbols, and determining that the first spatial resource 1 includes a spatial layer 1 and the first spatial resource 2 includes a spatial layer 2.

Of course, the protocol may not specify the number of first time frequency resources and/or the number of first space resources, and the network device may not configure the number of first time frequency resources and/or the number of first space resources. The number of frequency-domain resource groups included in each first time-frequency resource is fixed, and/or the number of spatial layers included in each first spatial resource is fixed. The number of the first time-frequency resources may vary with the change of the time-frequency resources of the downlink data, and the number of the first space resources may vary with the change of the number of the space layers of the terminal device. For example, each first time-frequency resource includes only one RPG in the frequency domain, and if the time-frequency resource of the downlink data includes 2 RPGs, there are 2 first time-frequency resources. If the time frequency resource of the downlink data comprises 4 RPGs, there are 4 first time frequency resources. As another example, each first spatial resource includes only one spatial layer, and if the terminal device has 2 corresponding spatial layers, then there are 2 first spatial resources. If the terminal device has 4 spatial layers in correspondence, there are 4 first spatial resources.

In one possible implementation, the first factor may also be associated with data in only one dimension. For example, data on a first time-frequency resource is associated with a first factor, and one or more groups of frequency-domain resources are included in a first time-frequency resource. Alternatively, data on a first spatial resource comprising a plurality of spatial layers is associated with a first factor.

Throughout the embodiments of the present application, a precoding algorithm that is used by the network device to precode data based on the first factor may be any one of the following algorithms: THP precoding, Zero Forcing (ZF) precoding, Regular Zero Forcing (RZF) precoding, eigenzero forcing (EZF) precoding, or minimum mean-square error (MMSE) precoding. Alternatively, the network device may also use other precoding algorithms to precode the data.

In the entire embodiment of the present application, for the description of the factors and how to perform precoding on data based on the factors, reference may be made to the description of the THP precoding based on the factors and the linear precoding based on the factors in the foregoing, which is not described herein again.

In one possible implementation, the first factor relates to one or more of the following items of information: the data on the first time-frequency resource, the first channel matrix corresponding to the first time-frequency resource or the first precoding matrix corresponding to the first time-frequency resource. The first time-frequency resource is a first time-frequency resource where data associated with the first factor is located. Based on the possible implementation mode, the corresponding channel matrix, the precoding matrix and the sent data signal are considered in a factor combination mode, the signal and channel characteristics are utilized to the maximum extent, the optimal interference avoidance and signal power improvement are achieved, and the system performance is improved.

502. The terminal device detects data on the first time-frequency resource and the first space resource.

For example, assume that a first time-frequency resource and a first space resource are as shown in fig. 6. The terminal device detects the data on the first time-frequency resource 1 and the spatial layer 1. The terminal device detects the data on the first time-frequency resources 2 and the spatial layer 1. The terminal device detects the data on the first time-frequency resources 1 and the spatial layer 2. The terminal device detects the first time-frequency resources 2 and the data on the spatial layer 2. How the terminal device detects the data on the first time-frequency resource and the first spatial resource may refer to the following description, which is not repeated herein.

It can be seen that, based on the method described in fig. 5, data on a first time-frequency resource and a first spatial resource are precoded by the same factor. So that the network device does not have to indicate a factor to the terminal device for each RE and each spatial layer. Therefore, based on the method described in fig. 5, it is advantageous to save signaling overhead.

Referring to fig. 11, fig. 11 is a schematic flow chart of another data detection method according to an embodiment of the present application. In the data detection method shown in fig. 11, the network device may indicate the first factor to the terminal device, and the terminal device may detect data on the first time-frequency resource and the first spatial resource based on the first factor. As shown in fig. 11, the data detection method includes the following steps 1101 to 1103. Wherein:

1101. The network device sends indication information to the terminal device, wherein the indication information indicates at least one first factor.

In an embodiment of the present application, data on a first time-frequency resource and a first spatial resource is associated with a first factor, different first time-frequency resources and data on the first spatial resource are associated with a first factor determined independently, the first factor is a scalar for precoding data associated with the first factor, a first time-frequency resource includes one or more groups of frequency-domain resources, and a first spatial resource includes one or more spatial layers.

For example, if the association relationship between the data on the first time-frequency resource and the first space resource and the first factor is as shown in fig. 6 to 10, the indication information sent by the network device indicates the factor 1 to the factor 4.

The indication information may be Downlink Control Information (DCI) signaling or other signaling capable of indicating a factor.

In one possible implementation, the first factor may be a factor in a set of factors or a factor in a quantization codebook, and the two implementations are described in detail below:

the first factor is a factor in the set of factors.

This set of factors may also be referred to as a set of candidate factors. The network device and the terminal device may quantize the set of factors based on Q bits, Q being an integer greater than 0. Factor set including N-2^QAnd (4) a factor. The factor combination obtained based on Q bit quantization means that N is 2 selected from 0-2 pi^QAnd (4) a factor. Wherein, Q may be predefined by a protocol or notified to the terminal device by the network device.

Optionally, the terminal device may not quantize the Q bits to obtain the factor set. For example, after the network device obtains the factor combination based on Q bits quantization, the factor combination can be configured to the terminal device. Alternatively, the set of factors may be protocol pre-specified.

Optionally, the network device and/or the terminal device may specifically obtain the factor set based on Q bits uniform quantization, that is, select N-2 with equal interval from 0 to 2 pi^QAnd (4) a factor. The set of factors resulting from uniform quantization based on Q bits can be expressed as:

optionally, each factor in the factor set may correspond to a factor index, and the indication information may specifically indicate the index of the first factor when indicating the first factor. Alternatively, each factor in the set of factors corresponds to a parameter value used to determine the factor. The indication information may particularly indicate the first factor by an index of a parameter value indicating the first factor.

For example, each factor in the set of factors corresponds to a value of the parameter K. The factor θ corresponding to the value of K can be expressed as:

that is, factor 0 corresponds to a K value of 0, factor

Corresponding to a K value of 1, …, factor

The corresponding K value is N-1. After the terminal device determines the value K, the factor corresponding to the value K can be determined based on equation (16). Therefore, the indication information may implicitly indicate the first factor by indicating an index of the K value to which the first factor corresponds.

The following further describes the combination of factors and how the indication information indicates the factors, with a specific example:

assuming that Q is 3, a factor set including 8 factors can be uniformly quantized based on Q bits. This set of factors can be expressed as:

as shown in fig. 6 to 10, it is assumed that there are 2 first time-frequency resources and 2 first spatial resources. The network device selects a factor from a set of factors

As a factor of the association of data on the first time-frequency resource 1 and the first spatial resource 1. And selecting factors from the set of factors

As a factor of the data association on the first time-frequency resource 1 and the first spatial resource 2. And selecting factors from the set of factors

As a factor of the association of data on the first time-frequency resource 2 and the first spatial resource 1. And selecting the factor pi from the set of factors as a factor of the association of the first time-frequency resource 2 and the data on the first spatial resource 2. It can be seen that the network device needs to select 4 factors from the set of factors and generate indication information indicating the 4 factors.

In one possible implementation, the indication information may indicate the factors in an order of the first spatial resource and the first time-frequency resource. For example, assuming that one factor requires 3 bits to indicate, the indication information requires 12 bits in total to indicate 4 factors. The 1 st to 3 rd bits are used to indicate the spatial layer 1 and the factor associated with the first time-frequency resource 1. The 4 th to 6 th bits are used to indicate the spatial layer 1 and the factor associated with the first time-frequency resource 2. The 7 th to 9 th bits are used to indicate the spatial layer 2 and the factor associated with the first time-frequency resource 1. The 10 th to 12 th bits are used to indicate the spatial layer 2 and the factor associated with the first time-frequency resource 2.

In another possible implementation, the factors may be indicated in an order of first time-frequency resources and then first spatial resources. For example, bits 1 to 3 are used to indicate a factor associated with the first time-frequency resource 1 and the spatial layer 1. The 4 th to 6 th bits are used to indicate factors associated with the first time-frequency resource 1 and the spatial layer 2. The 7 th to 9 th bits are used to indicate factors associated with the first time-frequency resources 2 and the spatial layer 1. The 10 th to 12 th bits are used to indicate the factors associated with the first time-frequency resource 2 and the spatial layer 2.

In one possible implementation, the indication information may indicate the 4 factors by an index of the 4 factors. The factor index corresponding to each factor in the factor set can be shown in table 1 below. After the terminal device receives the indication information, the factor indicated by the indication information can be determined based on the correspondence shown in table 1 below.

TABLE 1

In another possible implementation, the indication information may indicate the 4 factors by an index of 4K values. Each factor in the set of factors corresponds to a value of the parameter K, K being 0,1, 2. K corresponds to a factor equal to

The correspondence between the factors and the K values is shown in table 2 below. After the terminal device receives the indication information, the K value can be determined based on the correspondence between the K value and the index of the K value shown in table 3 below, and the corresponding factor is calculated based on the K value.

TABLE 2

TABLE 3

Index of K value	Value of K
		0	0
1	1
		2	2
3	3
		4	4
5	5
		6	6
7	7

It is to be noted that in table 1, a smaller index of the factor may correspond to a larger factor, and in table 3, a smaller index of the K value may correspond to a larger K value. In the embodiment of the application, no limitation is made on how the factor index corresponds to the factor, and no limitation is made on how the K value index corresponds to the K value.

The first spatial resource comprises a spatial layer, and the first time-frequency resource and a first factor associated with data on the first spatial resource are factors in a quantization codebook. The quantization codebook comprises P factor vectors, each factor vector is a vector of the quantization codebook, the factor vectors comprise N factors, the factors of the factor vectors are associated with the reference signal ports one by one, and P and N are integers greater than zero. The indication information indicates the first factor by carrying an index of the factor vector. Accordingly, the terminal device may determine the first factor from the quantization codebook based on the index of the factor vector and the reference signal port assigned to the terminal device. By presetting factor vectors (or called factor combinations), the granularity of the factors in the space dimension can be finer, and by indicating the index of one factor vector, a plurality of first factors can be indicated, so that the signaling overhead can be greatly saved.

The following describes how the quantization codebook and the indication information indicate the factor by using specific examples:

fig. 12 is a diagram illustrating a quantization codebook. As shown in fig. 12, the quantization codebook contains P factor vectors, each factor vector being a vector in the codebook, which may be in the form of a column vector or a row vector. Fig. 12 exemplifies that each factor vector is a column vector in the codebook. Alternatively, a factor vector may also be referred to as an array, or a column or a row in a quantization codebook. Each factor vector contains N rows of factors (i.e., each factor vector contains N factors), each row of factors of the factor vector being associated with one DMRS port number. The association relationship may be a fixed association relationship preset by a protocol, or an association relationship pre-configured by a network device. As shown in fig. 12, the first to nth row factors of the factor vector correspond to DMRS ports 0 to DMRS ports N-1, respectively. Alternatively, if the factor vector is a row vector, each factor vector contains N columns of factors, each column of the factor vector being associated with one DMRS port number.

As shown in fig. 8, it is assumed that there are 2 first time-frequency resources and 2 first spatial resources. The first time-frequency resources are divided according to frequency domains, the frequency domain resources of each first time-frequency resource are different, and the time domain resources of each first time-frequency resource are the same. Each of the first time-frequency resources includes a frequency domain length of 4 PRGs in a frequency domain and one or more time units in a time domain. Each first spatial resource includes 1 spatial layer. Then the network device may select two factor vectors from the P factor vectors. Assume that the network device selects a first column of factor vectors for the first time-frequency resource 1, spatial layer 1 and spatial layer 2 and a second column of factor vectors for the first time-frequency resource 2, spatial layer 1 and spatial layer 2. The network equipment sends indication information to the terminal equipment, and the indication information carries the index of the factor vector of the first column and the index of the factor vector of the second column.

In a multi-user multiple-input multiple-output (MU-MIMO) communication scenario, it is assumed that spatial layer 1 corresponds to terminal device 1 and spatial layer 2 corresponds to terminal device 2. The terminal device 1 and the terminal device 2 also store quantization codebooks shown in fig. 12. After terminal device 1 and terminal device 2 receive the indication information, the factor vector of the first column and the factor vector of the second column are determined from the quantization codebook based on the index of the factor vector of the first column and the index of the factor vector of the second column. DMRS port 0 is associated with spatial layer 1, and DMRS port 1 is associated with spatial layer 2. For terminal device 1, the DMRS port allocated by the network device to terminal device 1 is 0. The terminal device 1 determines that 1 in the first column of the factor vector is the first time-frequency resource 1 and the factor 1 associated with the data on the spatial layer 1, and determines that 1 in the second column of the factor vector is the first time-frequency resource 2 and the factor 2 associated with the data on the spatial layer 1. The terminal device 1 detects data precoded based on the factor 1, i.e. detects data on the first time-frequency resource 1 and the spatial layer 1 based on the factor 1. The terminal device 1 detects the data pre-coded based on the factor 2, i.e. detects the data on the first time-frequency resource 2 and the spatial layer 1 based on the factor 2. For terminal device 2, the DMRS port allocated by the network device to terminal device 1 is 1. Terminal device 2 determines in the factor vector of the first column

Factor 3 associated with the data on the first time-frequency resource 1 and the spatial layer 2, and in the factor vector determining the second column

A factor of 4 associated with the first time frequency resource 2 and the data on the spatial layer 2. The terminal device 2 detects the data precoded based on the factor 3, i.e. detects the data on the first time-frequency resource 1 and the spatial layer 2 based on the factor 2. The terminal device 2 detects the data precoded based on the factor 4, i.e. detects the data on the first time-frequency resource 2 and the spatial layer 2 based on the factor 2.

In a communication scenario of multi-user multiple-input multiple-output (SU-MIMO), it is assumed that a terminal device is allocated DMRS port 0 and DMRS port 1 by a network device. DMRS port 0 is associated with spatial layer 1 and DMRS port 1 is associated with spatial layer 2. Then the terminal device determines that 1 in the factor vector of the first column is the factor 1 associated with the first time-frequency resource 1 and the data on spatial layer 1,

a factor of 2 associated with the first time-frequency resource 1 and the data on the spatial layer 2. The terminal device determines 1 in the factor vector of the second column to be the factor 3 associated with the first time-frequency resource 2 and the data on spatial layer 1,

a factor of 4 associated with the first time frequency resources 2 and the data on the spatial layer 2. The terminal device 1 detects data precoded based on the factor 1. The terminal device 1 detects the data precoded based on the factor 2. The terminal device 1 detects the data precoded based on the factor 3. The terminal device 1 detects data precoded based on the factor 4.

It can be seen that the network device only needs to indicate an index of one factor vector for each first time-frequency resource. For a first time-frequency resource, the network device indicates a factor vector with an overhead of

Bits of which

And (6) rounding the upper part. Take the example of a quantization codebook containing 64 vectors of P-factors. Assuming that the number of the first time-frequency resources is 2, the indication information is needed in total

One bit to indicate the factor.

It is worth mentioning that fig. 12 takes the factor e as^jθFor example. The factor can alsoIs e^-jθAlternatively, the factor may be j θ, or the factor may be θ. Where j is the imaginary unit, satisfying j²＝-1。

1102. The network equipment precodes data on the first time-frequency resource and the first space resource based on the first factor, and transmits the precoded data on the first time-frequency resource.

Wherein step 1101 may be performed before step 1102, or after step 1102, or step 1101 may be performed simultaneously with step 1102. The specific implementation manner of step 1102 is the same as the specific implementation manner of step 501, and reference may be specifically made to the description under step 501, which is not described herein again.

1103. The terminal device detects data precoded based on the first factor.

In the embodiment of the application, after receiving the indication information, the terminal device detects data precoded based on the first factor.

Example 1: take the example that the network device uses the THP precoding algorithm based on the factors to precode the data. As can be seen from the foregoing description, the data symbol vector received by all terminal devices can be represented as:

the data signal received by the kth terminal device on the first time-frequency resource and the l spatial layer can be represented by the foregoing formula (10):

wherein, the terminal device can estimate the equivalent channel coefficient corresponding to the l spatial layer by using the DMRS

Terminal equipment based on received signal y_k,lEquivalent channel coefficient

And a first factor

Or

Or j θ_k,lOr-j theta_k,lThe data symbols transmitted by the network device can be recovered. For example, the first factor corresponding to the first time-frequency resource and the data on the l spatial layer is

The terminal device obtains the equivalent channel coefficient of the l spatial layer

And factor

Multiplying to obtain equivalent channel coefficient

Using received signals y_k,lAnd equivalent channel coefficient

The received signal is detected.

Estimating equivalent channel coefficients corresponding to data symbols by using reference signals for terminal equipment

The introduction is as follows:

take DMRS (demodulation reference signal) as an example of the reference signal. The DMRS is used for channel estimation at the receiving end to complete data detection. Generally, on the network device side, DMRS and data perform exactly the same precoding operation (i.e., perform calculation using the same precoding matrix), thereby ensuring that DMRS and data experience the same equivalent channel. Taking the downlink transmission as an example,suppose that a downlink data symbol vector sent by a network device is s^PDsCH＝(s₁,s₂,…,s_L)^TTransmitted DMRS symbol constituting vector

wherein

And the DMRS symbol corresponding to the l < th > DMRS port corresponds to the l < th > spatial layer. The data symbol vector received by the terminal device may be represented as y-HPs^PDSCH+ n. The DMRS symbol vector received by the terminal device may be denoted as r-HPs^RS+ n. Due to the DMRS symbol vector s^RSThe terminal equipment carries out channel estimation on DMRS (demodulation reference signal) and can obtain an equivalent channel as known to a transmitting end and a receiving end

The estimation result of (2). The terminal equipment can complete the data symbol vector s based on the estimation result of the equivalent channel^PDSCHDetection of (3). However, for THP precoding, DMRS cannot adopt the same precoding procedure as data, because the mode operation introduces a disturbance term d_kτ, the original DMRS signal sequence is changed. Therefore, the DMRS signal cannot be known to the receiving end, and thus accurate channel estimation cannot be performed.

For the THP precoding channel estimation problem, DMRS needs to be precoded differently from data. Generally, DMRS may employ linear precoding. In one implementation, if the network device uses a factor-based THP precoding algorithm to precode data, the DMRS symbol vector sent by the sending end is assumed to be s^RSThe network device precoding the DMRS may be represented as:

the DMRS symbol vector received by the terminal device may be represented as:

due to the DMRS symbol vector s^RSIs known to the transceiving end, so that the equivalent channel matrix R can be obtained by a channel estimation algorithm (such as least square LS estimation algorithm or minimum mean square error MMSE algorithm, etc.)^HThe estimation result of (2). It is noted that R^HIs a lower triangular matrix. As described above, the G matrix is a diagonal matrix whose main diagonal elements are the inverse of the main diagonal elements of the R matrix. Thus, the equivalent channel matrix R corresponding to the DMRS^HEquivalent channel matrix G with main diagonal elements corresponding to data symbols^-1The main diagonal elements of (a) are the same. Therefore, the terminal equipment can obtain the equivalent channel matrix

The estimation result of (2). Through the notification signaling sent by the network device, the terminal device can acquire the power factor difference between DMRS precoding and data precoding, that is, the difference between α and β. Based on the power factor difference, the terminal device may determine

The estimation result of (2). Wherein α may also default to 1.

In another implementation, if the network device uses a factor-based THP precoding algorithm to precode data, the DMRS symbol vector sent by the sending end is assumed to be s^RSThe network device precoding the DMRS may be represented as:

where α represents a power normalization factor. The DMRS symbol vector received by the terminal device may be represented as:

due to the DMRS symbol vector s^RSIs known to the transceiving end, so that the equivalent channel matrix can be obtained by a channel estimation algorithm (such as least square LS estimation algorithm or minimum mean square error MMSE algorithm, etc.)

The estimation result of (2). Wherein α may also default to 1.

Example 2: take the example of a network device precoding data using a factor-based EZF precoding algorithm. Based on the aforementioned formula (14), the k-th terminal device is in the first time-frequency resource, L_kThe vector of data symbols received on a spatial layer can be represented as:

wherein ,H_kFor the channel matrix corresponding to the kth terminal device, W_kPrecoding matrix, s, corresponding to the kth terminal equipment_kFor a data symbol vector, n, transmitted by the kth terminal on the first time-frequency resource_kFor the additive noise corresponding to the kth terminal device,

the interference brought by other K-1 paired terminal devices corresponding to the kth terminal device, beta is a power normalization factor or a power control factor,

is dimension L_k×L_kA diagonal matrix of (a) representsFactor matrix, theta, corresponding to k terminal devices_k,lOr

Or

Or j θ_k,lThe first factor corresponding to the ith spatial layer of the kth terminal device is represented, and the following description is omitted for the same reason.

The terminal equipment can estimate the equivalent channel matrix H by using the DMRS_kW_kAnd based on L corresponding to the k terminal device_kFirst factor theta of spatial layer_k,lOr

Or

Or j θ_k，l(l＝1,2,…,L_k) Obtaining corresponding factor matrix

Terminal equipment based on received signal y_kEquivalent channel matrix H_kW_kAnd a factor matrix

The data symbols transmitted by the network device can be recovered.

In one implementation, if the network device uses a factor-based EZF precoding algorithm to precode data, the DMRS symbol vector corresponding to the kth terminal device at the transmitting end is assumed to be

wherein

And the DMRS symbol corresponding to the l < th > DMRS port corresponds to the l < th > spatial layer of the k < th > terminal equipment. DMRS symbol corresponding to kth user by network equipment(Vector)

Performing the pre-coding process can be expressed as:

wherein ,W_kAnd the precoding matrix corresponding to the kth terminal equipment. Generally, DMRS signals of each terminal device are orthogonal, and a corresponding received DMRS symbol vector for a kth terminal device may be expressed as:

n_kand representing the additive noise vector corresponding to the k terminal equipment. I is_kIndicating that the kth terminal device corresponds to the received interference signal. Due to DMRS symbols

Is known to the transceiving end, so that the equivalent channel matrix can be obtained by a channel estimation algorithm (such as least square LS estimation algorithm or minimum mean square error MMSE algorithm, etc.)

The estimation result of (2).

It can be seen that, by implementing the method described in fig. 11, the network device precodes the transmitted data symbols with the same factor for the data on one first time-frequency resource and one first spatial resource, and the network device only needs to indicate one factor for the data on one first time-frequency resource and one first spatial resource. A first time-frequency resource comprises one or more groups of frequency-domain resources and a first spatial resource comprises one or more spatial layers. The network device does not need to indicate one factor per RE and per spatial layer. Therefore, based on the method described in fig. 11, it is beneficial to save signaling overhead of the indication information.

Referring to fig. 13, fig. 13 is a schematic flow chart of another data detection method according to an embodiment of the present application. In the method depicted in fig. 13, in addition to having the first time-frequency resource and the first spatial resource, there is also a second time-frequency resource and a second spatial resource. The data on the second time-frequency resources and the second spatial resources are precoded based on a second factor, and the second factor is carried by the reference signal. As shown in fig. 13, the data detection method includes operations 1301 to 1305 as follows. Wherein:

1301. the network equipment precodes at least one reference signal and sends the precoded at least one reference signal to the terminal equipment.

In the embodiment of the present application, the time-frequency resources of the downlink data scheduled by the network device are divided into one or more first time-frequency resources and one or more second time-frequency resources. Wherein a second time-frequency resource and a second space resource are associated with a reference signal, data on the second time-frequency resource and the second space resource are associated with a second factor, the second factor is a scalar for precoding the data associated with the second factor, the second time-frequency resource comprises one or more frequency-domain resource groups, and the second space resource comprises one or more spatial layers. Data on a first time-frequency resource and a first spatial resource is associated with a first factor, different first time-frequency resources and data on the first spatial resource are associated with first factors that are independently determined, the first factors are scalars used for precoding data associated with the first factors, a first time-frequency resource comprises one or more frequency-domain resource groups, and a first spatial resource comprises one or more spatial layers. For the description of the first time-frequency resource, the first spatial resource and the first factor, reference may be made to the description in the embodiment corresponding to fig. 5 or fig. 11, which is not repeated herein.

Throughout the embodiments of the present application, precoding a reference signal may be equivalent to preprocessing a transmitted reference signal symbol or a transmitted reference signal element, for example, performing phase rotation on the transmitted reference signal symbol or the transmitted reference signal element. A reference signal throughout the context of embodiments of the present application may include one or more reference signal symbols, one reference signal symbol representing one reference signal element. The reference signal symbols may be demodulation reference signal (DMRS) symbols, or the reference signal symbols may be symbols on part of resources in one DMRS resource, or the reference signal symbols may also be other types of reference signal symbols. One reference signal may comprise reference signal symbols located in different time frequency units. One reference signal symbol may correspond to one reference signal port, and one reference signal port may correspond to one spatial layer. The reference signal symbols corresponding to different reference signal ports may constitute a reference signal symbol vector. The different reference signal ports may be orthogonal ports, that is, the reference signal symbols corresponding to the different reference signal ports may be sent in one or more of frequency division multiplexing, time division multiplexing, or code division multiplexing. The multiple reference signal symbols may be transmitted on different time frequency resources, or may be transmitted on the same time frequency resource.

Throughout the embodiments of the present application, precoding a reference signal may be equivalent to preprocessing a transmitted reference signal symbol or a transmitted reference signal element, for example, performing phase rotation on the transmitted reference signal symbol or the transmitted reference signal element.

In this embodiment, the network device performs precoding on the second time-frequency resource and the reference signal associated with the second space resource based on a second factor associated with data on the second time-frequency resource and the second space resource. That is, the second factor associated with data on the second time-frequency resource and the second spatial resource is also used to precode reference signals associated with the second time-frequency resource and the second spatial resource.

In this embodiment, a second time-frequency resource includes one or more resource groups in frequency domain, and a second spatial resource includes one or more spatial layers. The different second time-frequency resources may comprise the same or different number of frequency-domain resource groups. The number of spatial layers comprised by the different second spatial resources may also be the same or different. For a description of the frequency-domain resource group, reference may be made to the description in the embodiment corresponding to fig. 5, which is not repeated herein. A second time-frequency resource comprising one or more groups of frequency-domain resources may be understood as: the length of a second time-frequency resource in the frequency domain is the length of the frequency domain of one or more frequency-domain resource groups, or the frequency-domain bandwidth of a second time-frequency resource is the length of the frequency domain of one or more frequency-domain resource groups, or a second time-frequency resource comprises one or more frequency-domain resource groups in the frequency domain.

Optionally, one second time-frequency resource may further include one or more time units in the time domain. A time unit may be one or more (Orthogonal Frequency Division Multiplexing, OFDM) symbols, or one or more slots (slots). The number of time units comprised in the time domain by the different second time-frequency resources may be the same or different.

For example, assume that there is a first spatial resource and a second spatial resource, both of which are spatial layer 1. Fig. 14a is a schematic diagram of the first time-frequency resource and the second time-frequency resource on the spatial layer 1. As shown in fig. 14a, the first time-frequency resource 1, the first time-frequency resource 2, the second time-frequency resource 1, and the second time-frequency resource 2 respectively include 3 OFDM symbols in the time domain and 2 RBs in the frequency domain. The first time-frequency resource 1, the first time-frequency resource 2, the second time-frequency resource 1 and the second time-frequency resource 2 occupy different OFDM symbols, and the RBs occupied on the frequency domain are the same. Namely, the first time-frequency resource 1, the first time-frequency resource 2, the second time-frequency resource 1 and the second time-frequency resource 2 are divided according to time domain. The time-frequency resources of the white grid in fig. 14a are used for mapping the reference signals. For example, the reference signal may be a DMRS or other reference signal, and fig. 14a takes the reference signal as the DMRS as an example. The time-frequency resources of the white grids in fig. 14b to 23, 26a, 26b, 28 and 30 are also used for mapping the reference signals, and are not described in detail later. Each second time-frequency resource is preceded by a time-frequency resource for mapping the DMRS. Wherein, the data on the second time-frequency resource 1 and the spatial layer 1 and the second factor t ₂Associating, the second time-frequency resource 1 and the spatial layer 1 are associated with the DMRS1, the network device based on the second factor t₂Precoding a DMRS1, and based on a second factor t₂For the second time frequencyThe data on resource 1 and spatial layer 1 are precoded. Data on the first time-frequency resource 1 and the spatial layer 1 and a first factor t₁Associating, the network device based on the first factor t₁Data on the first time-frequency resource 1 and the spatial layer 1 are precoded. Data on the second time-frequency resource 2 and the spatial layer 1 and the second factor t₄Associating, the second time-frequency resource 2 and the spatial layer 1 being associated with a DMRS2, the network device being based on a second factor t₄Precoding a DMRS2, and based on a second factor t₄The data on the second time-frequency resources 2 and the spatial layer 1 are precoded. Data on the first time-frequency resources 2 and spatial layer 1 and a first factor t₃Associating, the network device based on the first factor t₃The data on the first time-frequency resources 2 and the spatial layer 1 are precoded.

As another example, assume that there is a first spatial resource comprising spatial layer 1 and spatial layer 2, and there are two second spatial resources, the second spatial resource 1 comprising spatial layer 1 and the second spatial resource 2 comprising spatial layer 2. Fig. 14a can be understood as a schematic diagram of the first time-frequency resource and the second time-frequency resource on the spatial layer 1. Fig. 14b can be understood as a schematic diagram of the first time-frequency resource and the second time-frequency resource on the spatial layer 2. Second factor t in FIG. 14b ₅Is a factor of the data association on the second time-frequency resource 1 and the second spatial resource 2. The second time-frequency resource 1 and the second spatial resource 2 are associated with DMRS 3. The network device is based on the second factor t₅Precoding a DMRS3, and based on a second factor t₅Data on the second time-frequency resource 1 and the second spatial resource 2 are precoded. Second factor t₆Is a factor of the data association on the second time-frequency resource 2 and the second spatial resource 2. The second time-frequency resource 2 and the second spatial resource 2 are associated with a DMRS4, the network device based on a second factor t₆Precoding a DMRS4, and based on a second factor t₆Data on the second time-frequency resource 2 and the second spatial resource 2 are precoded.

The first time frequency resource and the second time frequency resource can have the following 3 division modes:

the time domain resources included by the first time frequency resources are different from the time domain resources included by the second time frequency resources.

If the time domain resources included in the first time frequency resources are different from the time domain resources included in the second time frequency resources, but the frequency domain resources included in the first time frequency resources are the same as the frequency domain resources included in the second time frequency resources, the first time frequency resources and the second time frequency resources are divided according to time domains. For example, as shown in fig. 14a and 14 b.

For another example, fig. 15 illustrates a second time-frequency resource and two first time-frequency resources. Assuming that there is a first spatial resource and a second spatial resource, both the first spatial resource and the second spatial resource are the spatial layer 1, fig. 15 is a schematic diagram of the first time-frequency resource and the second time-frequency resource on the spatial layer 1, and fig. 16 to fig. 23 are the same and will not be described later. As shown in fig. 15, the second time-frequency resource 1, the first time-frequency resource 1, and the first time-frequency resource 2 respectively include 3 OFDM symbols in the time domain and 2 RBs in the frequency domain. And the second time-frequency resource 1, the first time-frequency resource 1 and the first time-frequency resource 2 comprise different OFDM symbols in the time domain, and comprise the same RB in the frequency domain.

As another example, fig. 16 illustrates two second time-frequency resources and one first time-frequency resource. As shown in fig. 16, the second time-frequency resource 1, the first time-frequency resource 1, and the second time-frequency resource 2 respectively include 3 OFDM symbols in the time domain and 2 RBs in the frequency domain. And the second time frequency resource 1, the first time frequency resource 1 and the second time frequency resource 2 comprise different OFDM symbols in the time domain, and comprise the same RB in the frequency domain.

The method can make the second time frequency resource closer to the reference signal resource correspondingly bearing the factor corresponding to the second time frequency resource in time, and is beneficial to accurately estimating the equivalent channel corresponding to the data on the second time frequency resource based on the reference signal.

The frequency domain resources included by the first time frequency resources are different from the frequency domain resources included by the second time frequency resources.

If the time domain resources included in the first time frequency resources are different from the frequency domain resources included in the second time frequency resources, but the frequency domain resources included in the first time frequency resources are the same as the time domain resources included in the second time frequency resources, the first time frequency resources and the second time frequency resources are divided according to the frequency domain. For example, fig. 17 exemplifies a case where there are one first time-frequency resource and one second time-frequency resource. As shown in fig. 17, the first time-frequency resource and the second time-frequency resource respectively include 9 OFDM symbols in the time domain and 1 RB in the frequency domain. And the first time-frequency resource and the second time-frequency resource comprise the same OFDM symbols in the time domain and different RBs in the frequency domain.

For another example, fig. 18 illustrates a first time-frequency resource and two second time-frequency resources. As shown in fig. 18, the first time-frequency resource 1, the second time-frequency resource 1, and the second time-frequency resource 2 respectively include 9 OFDM symbols in the time domain and 1 RB in the frequency domain. The first time-frequency resource 1, the second time-frequency resource 1 and the second time-frequency resource 2 comprise the same OFDM symbols in the time domain, and comprise different RBs in the frequency domain.

For another example, fig. 19 illustrates two first time-frequency resources and one second time-frequency resource. As shown in fig. 19, the first time-frequency resource 1, the first time-frequency resource 2, and the second time-frequency resource 1 respectively include 9 OFDM symbols in the time domain and 1 different RB in the frequency domain. The first time-frequency resource 1, the first time-frequency resource 2 and the second time-frequency resource 1 comprise the same OFDM symbols in the time domain, and comprise different RBs in the frequency domain.

The method can enable the second time frequency resource to be closer to the reference signal resource correspondingly bearing the factor corresponding to the second time frequency resource in the frequency domain, and is beneficial to accurately estimating the equivalent channel corresponding to the data on the second time frequency resource based on the reference signal.

And the frequency domain resource groups included by the first time-frequency resource and the second time-frequency resource are different, and the time domain resources included by the first time-frequency resource and the time domain resources included by the second time-frequency resource are different. I.e. the first time-frequency resource and the second time-frequency resource are divided according to the time domain and the frequency domain. Optionally, the frequency-domain resource group included in the second time-frequency resource in the frequency domain may be N times that of the first time-frequency resource, or

N is an integer greater than 1. The second spatial resource comprises a number of spatial layersOr may be N times the number of spatial layers included in the first spatial resource or

And (4) doubling.

For example, fig. 20 is an example with two first time-frequency resources and one second time-frequency resource. As shown in fig. 20, the first time-frequency resource 1, the first time-frequency resource 2 and the second time-frequency resource 1 respectively include 3 OFDM symbols in the time domain. The second time-frequency resource 1 includes 2 RBs in the frequency domain, the first time-frequency resource 1 and the first time-frequency resource 2 include 1 RB in the frequency domain, respectively, and the RBs included in the first time-frequency resource 1 and the first time-frequency resource 2 are different.

As another example, fig. 21 illustrates an example having two second time-frequency resources and one first time-frequency resource. As shown in fig. 21, the first time-frequency resource 1, the second time-frequency resource 1 and the second time-frequency resource 2 respectively include 3 OFDM symbols in the time domain. The first time-frequency resource 1 includes 2 RBs in the frequency domain, the second time-frequency resource 1 and the second time-frequency resource 2 include 1 RB in the frequency domain, respectively, and the RBs included in the second time-frequency resource 1 and the second time-frequency resource 2 are different.

In one possible implementation, there are one or more sets of time-frequency resources, one set of time-frequency resources comprising one or more first time-frequency resources and one or more second time-frequency resources. By the division method, one time-frequency resource set is further divided into time-frequency resource subsets with smaller granularity by the first time-frequency resource and the second time-frequency resource, and each time-frequency resource subset only contains less time-frequency resources. Different time frequency resource subsets correspond to different factors, and fine factor adjustment is facilitated, so that power efficiency improvement brought by the factors is improved as much as possible. Certainly, there may also be no concept of a time-frequency resource set, and the time-frequency resources of the downlink data scheduled by the network device are directly divided into one or more first time-frequency resources and one or more second time-frequency resources.

Optionally, the time-frequency resource set may have the following 3 partitioning manners:

dividing a time frequency resource set according to a frequency domain. That is, the frequency domain resources of different time frequency resource sets are different, and the time domain resources of different time frequency resource sets are the same.

For example, as shown in fig. 22, fig. 22 is an example with 2 time-frequency resource sets. The time-frequency resource set 1 includes 7 symbols in the time domain, and the time-frequency resource set 2 also includes 7 symbols in the time domain. The time-frequency resource set 1 includes 2 RBs in the frequency domain. Time-frequency resource set 2 includes 2 RBs in the frequency domain. The RB included in the frequency domain is different between the time-frequency resource set 1 and the time-frequency resource set 2. The set of time-frequency resources 1 comprises a first time-frequency resource 1 and a second time-frequency resource 1. The set of time-frequency resources 2 comprises a first time-frequency resource 2 and a second time-frequency resource 2. The set 1 of time-frequency resources may also comprise a plurality of first time-frequency resources and a plurality of second time-frequency resources. The set of time-frequency resources 2 may also comprise a plurality of first time-frequency resources and a plurality of second time-frequency resources. Fig. 22 exemplifies that the time-frequency resource set 1 includes a first time-frequency resource and a second time-frequency resource, and the time-frequency resource set 2 includes a first time-frequency resource and a second time-frequency resource. Optionally, the time-frequency resources used for mapping the reference signals may not belong to the resources in the time-frequency resource set, and fig. 22 exemplifies that the time-frequency resources used for mapping the reference signals belong to the resources in the time-frequency resource set.

And dividing the time-frequency resource set according to the time domain. That is, the time domain resources of different time frequency resource sets are different, and the frequency domain resources of different time frequency resource sets are the same.

For example, as shown in fig. 23, fig. 23 is an example with 2 time-frequency resource sets. The time-frequency resource set 1 includes 4 symbols in the time domain, and the time-frequency resource set 2 also includes 4 symbols in the time domain. The time frequency resource set 1 and the time frequency resource set 2 comprise different symbols in the time domain. Time-frequency resource set 1 includes 4 RBs in the frequency domain. Time-frequency resource set 2 includes 4 RBs in the frequency domain. The set of time-frequency resources 1 comprises a first time-frequency resource 1 and a second time-frequency resource 1. The set of time-frequency resources 2 comprises a first time-frequency resource 2 and a second time-frequency resource 2. The set 1 of time-frequency resources may also comprise a plurality of first time-frequency resources and a plurality of second time-frequency resources. The set of time-frequency resources 2 may also comprise a plurality of first time-frequency resources and a plurality of second time-frequency resources. Fig. 23 exemplifies that the time-frequency resource set 1 includes a first time-frequency resource and a second time-frequency resource, and the time-frequency resource set 2 includes a first time-frequency resource and a second time-frequency resource.

And thirdly, dividing the time frequency resource set according to the time domain and the frequency domain. That is, the time domain resources of different time frequency resource sets are different, and the frequency domain resources of different time frequency resource sets are different.

In one possible implementation, the number of second time-frequency resources is predefined by the protocol; or before the terminal device receives the indication information sent by the network device, the terminal device may further receive configuration information sent by the network device, where the configuration information is used to configure the number of the second time-frequency resources. Accordingly, the network device may send the configuration information to the terminal device.

Optionally, the network device and the terminal device determine the time frequency resource included in each second time frequency resource based on the time frequency resource of the downlink data scheduled by the network device and the number of the second time frequency resources.

In a possible implementation, the number of frequency domain resources (or the bandwidth of the second time frequency resource in the frequency domain) included in the second time frequency resource is protocol-specified or configured by the network device. For example, the second time-frequency resource may include 1 PRG as the number of frequency-domain resources. Optionally, the terminal device and the network device may divide one or more second time-frequency resources in the scheduled time-frequency resources according to a preset second time-frequency resource division method based on the number of frequency-domain resources included in the second time-frequency resources.

In one possible implementation, when there are one or more time-frequency resource sets, the protocol may pre-specify the number of time-frequency resource sets and/or the number of first time-frequency resources included in a time-frequency resource set and/or the number of second time-frequency resources included in a time-frequency resource set; or, when there are one or more time-frequency resource sets, the network device may also send configuration information to configure the number of the time-frequency resource sets and/or the number of the first time-frequency resources included in the time-frequency resource set and/or the number of the second time-frequency resources included in the time-frequency resource set. Accordingly, the terminal device may receive the configuration information.

In a possible implementation, the network device determines, based on the time-frequency resources of the downlink data scheduled by the network device, and the number of the time-frequency resource sets and/or the number of the first time-frequency resources included in the time-frequency resource sets and/or the number of the second time-frequency resources included in the time-frequency resource sets, the time-frequency resources included in the first time-frequency resources and/or the time-frequency resources included in the second time-frequency resources in each time-frequency resource set.

1302. The network device precodes data on the second time frequency resource and the second space resource based on the second factor, and transmits the precoded data on the second time frequency resource.

In one possible implementation, if the data is precoded by using a linear precoding algorithm, the process of precoding the data or the reference signal by the second factor is as follows:

wherein s＝(s₁,s₂,…,s_L)^TRepresenting the transmitted data or reference signal.

Is a diagonal matrix, beta is a power adjustment factor,

or

Or

And W is a linear precoding matrix.

In one possible implementation, if the THP precoding algorithm is used to precode data, the process of precoding data by the second factor is:

wherein s＝(s₁,s₂,…,s_L)^TRepresenting the data being transmitted.

Is a diagonal matrix, beta is a power adjustment factor,

or

Or

Representing the second factor corresponding to the k-th spatial layer, the Q and B matrices are related to the channel matrix H. d ═ d (d)₁,d₂,…,d_L)^Tτ is the modulus operation parameter for the perturbation vector due to the modulus operation.

In one possible implementation, if the THP precoding algorithm is used to precode data, the process of precoding the reference signal by the second factor is:

or the following steps:

wherein s＝(s₁,s₂,…,s_L)^TIndicating the transmitted reference signal.

Is a diagonal matrix, alpha is a power adjustment factor,

or

Or

1303. The network equipment precodes data on the first time-frequency resource and the first space resource based on the first factor, and transmits the precoded data on the first time-frequency resource.

If the linear precoding algorithm is adopted to precode the data, the process of precoding the data through the first factor is as follows:

wherein s＝(s₁,s₂,…,s_L)^TIndicating the data being transmitted.

Is a diagonal matrix, beta is a power adjustment factor,

or

Or

And W is a linear precoding matrix.

If the THP precoding algorithm is adopted to precode the data, the process of precoding the data through the first factor is as follows:

wherein s＝(s₁,s₂,…,s_L)^TIndicating the data being transmitted.

Is a diagonal matrix, beta is a power adjustment factor,

or

Or

Representing the first factor for the kth spatial layer, the Q and B matrices are related to the channel matrix H. d ═ d (d)₁,d₂,…,d_L)^Tτ is the modulus operation parameter for the perturbation vector due to the modulus operation.

In one possible implementation, the first factor relates to one or more of the following items of information: the data on the first time-frequency resource, the first channel matrix corresponding to the first time-frequency resource or the first precoding matrix corresponding to the first time-frequency resource. The first time-frequency resource is a first time-frequency resource where data associated with the first factor is located.

In one possible implementation, the second factor relates to one or more of the following information: data on the second time frequency resource, a reference signal associated with the second time frequency resource, a second channel matrix corresponding to the second time frequency resource, or a second precoding matrix corresponding to the second time frequency resource. The second time frequency resource is a second time frequency resource where data associated with the second factor is located. The data on the first time-frequency resource may be transmission data symbols on all corresponding spatial layers on the first time-frequency resource. The data on the second time-frequency resource may be transmission data symbols on all corresponding spatial layers on the second time-frequency resource. The reference signals associated with the second time-frequency resource may be reference signal symbols corresponding to all spatial layers corresponding to the second time-frequency resource.

Based on the possible implementation mode, the corresponding channel matrix, the pre-coding matrix and the sent data signal are considered in the factor combination mode, or the corresponding channel matrix, the pre-coding matrix, the sent data signal and the corresponding reference signal are considered in the factor combination mode, so that the signal and channel characteristics are utilized to the maximum extent, the optimal interference avoidance and the signal power improvement are realized, and the system performance is favorably improved.

1304. The terminal equipment detects data on a second time-frequency resource and a second space resource which are associated with the reference signal based on the reference signal.

In the embodiment of the present application, after receiving at least one reference signal, the terminal device detects data on a second time-frequency resource and a second space resource associated with the reference signal based on the reference signal.

1305. The terminal device detects data on the first time-frequency resource and the first space resource.

For example, suppose there is a first spatial resource and a second spatial resource, both of which are spatial layers 1, and fig. 14a is a schematic diagram of the first time-frequency resource and the second time-frequency resource on the spatial layers 1. As shown in FIG. 14a, the data on the second time-frequency resource 1 and the spatial layer 1 and the second factor t ₂Associating, the second time-frequency resource 1 and the spatial layer 1 are associated with the DMRS1, the network device is based on the second factor t₂And precoding the DMRS1, and transmitting the precoded DMRS 1. The network device is based on the second factor t₂And precoding data on the second time-frequency resource 1 and the spatial layer 1, and sending the precoded data on the second time-frequency resource 1. Data on the first time-frequency resource 1 and the spatial layer 1 and a first factor t₁Associating, the network device based on the first factor t₁And precoding the data on the first time-frequency resource 1 and the spatial layer 1, and transmitting the precoded data. After the terminal device receives the DMRS1, data on the second time-frequency resource 1 and the spatial layer 1 are detected based on the DMRS 1. The terminal device will also detect data on the first time-frequency resource 1 and the spatial layer 1.

Similarly, the data on the second time-frequency resource 2 and the spatial layer 1 and the second factor t₄Associated, the second time-frequency resource 2 and spatial layer 1 are associated with DMRS2The network device is based on the second factor t₄And precoding the DMRS2, and transmitting the precoded DMRS 2. The network device is based on the second factor t₄And precoding the data on the second time-frequency resource 2 and the spatial layer 1, and transmitting the precoded data. Data on the first time-frequency resources 2 and spatial layer 1 and a first factor t ₃Associating, the network device based on the first factor t₃And precoding the data on the first time-frequency resource 2 and the spatial layer 1, and transmitting the precoded data. After the terminal device receives the DMRS2, data on the second time-frequency resource 2 and the spatial layer 1 are detected based on the DMRS 2. The terminal device will also detect data on the first time-frequency resources 2 and the spatial layer 1.

Specific implementation manners of the terminal device detecting data on the second time-frequency resource 1 and the spatial layer 1 based on the DMRS1 and detecting data on the second time-frequency resource 2 and the spatial layer 1 based on the DMRS2 may be referred to the description in the embodiment corresponding to fig. 24 below, which is not described herein again. The specific implementation manner of the terminal device detecting the data on the first time-frequency resource 1 and the spatial layer 1 and detecting the data on the first time-frequency resource 2 and the spatial layer 1 can be referred to the description in the embodiment corresponding to fig. 24, fig. 25, or fig. 27, and is not described herein again.

Based on the method described in fig. 13, the time-frequency resources scheduled by the network device may be divided into the first time-frequency resources and the second time-frequency resources, so that the data on the first time-frequency resources and the second time-frequency resources may be precoded using different factors, which may make the granularity of the factors finer, thereby improving the system performance. And the factors for precoding the second time-frequency resources and the second space resources are carried by the reference signals, and the network equipment does not need to indicate the factors for precoding the second time-frequency resources and the second space resources, so that the cost of indicating signaling can be saved.

Referring to fig. 24, fig. 24 is a schematic flow chart of another data detection method according to an embodiment of the present application. Compared to the method described in fig. 13, in the method described in fig. 24, the network device may further indicate first information related to the first factor to the terminal device through signaling, so that the terminal device may detect data on the first time-frequency resource and the first spatial resource based on the first information. As shown in fig. 24, the data detection method includes operations 2401 to 2406 as follows. Wherein:

2401. the network equipment sends indication information to the terminal equipment, wherein the indication information is used for indicating at least one piece of first information.

Wherein a first information is related to a first factor and a first information is associated with a second time-frequency resource and a second space resource.

A second time-frequency resource and a second spatial resource are associated with a reference signal, data on the second time-frequency resource and the second spatial resource are associated with a second factor, the second factor is a scalar for precoding the data associated with the second factor, a second time-frequency resource comprises one or more frequency-domain resource groups, and a second spatial resource comprises one or more spatial layers. Data on a first time-frequency resource and a first spatial resource is associated with a first factor, different first time-frequency resources and data on the first spatial resource are associated with independently determined first factors, the first factors are scalars used for precoding data associated with the first factors, a first time-frequency resource comprises one or more frequency-domain resource groups, and a first spatial resource comprises one or more spatial layers. In the embodiment of the present application, for the related descriptions of the first time-frequency resource, the first spatial resource, the second time-frequency resource, the second spatial resource, the reference signal, the first factor, and the second factor, reference may be made to the descriptions in the embodiments corresponding to fig. 5, fig. 11, and fig. 13, which are not repeated herein.

In a possible implementation, a first factor is associated with one or more second factors, and a first information is related to a first factor and a second factor with which the first factor is associated. And the second time frequency resource and the second space resource in which the data associated with the second factor related to the first information are located are the second time frequency resource and the second space resource associated with the first information.

For example, suppose the utensilThere is a first spatial resource and a second spatial resource, both of which are spatial layers 1, and fig. 14a is a schematic diagram of the first time-frequency resource and the second time-frequency resource on the spatial layers 1. As shown in fig. 14a, the first factor t₁Is a factor of the data association on the first time-frequency resource 1 and the first spatial resource. Second factor t₂Is a factor of the data association on the second time-frequency resource 1 and the second spatial resource. First factor t₃Is a factor of the data association on the first time frequency resource 2 and the first spatial resource. Second factor t₄Is a factor of the association on the second time-frequency resource 2 and the second spatial resource. Wherein the first factor t₁And a second factor t₂And (4) associating. First factor t₃And a second factor t ₄And (5) associating.

The indication information needs to indicate 2 first information. First information 1 and a first factor t₁And a second factor t₂In relation, the first information 1 is associated with a second time-frequency resource 1 and a second spatial resource. The DMRS1 is associated with a second time-frequency resource 1 and a second spatial resource, and thus, the DMRS1 is based on a second factor t₂And carrying out precoding. First information 2 and a first factor t₃And a second factor t₄In relation, the first information 2 is associated with a second time-frequency resource 2 and a second spatial resource. The DMRS2 is associated with a second time-frequency resource 2 and a second spatial resource, and thus, the DMRS2 is based on a second factor t₄And carrying out precoding.

As another example, assume that there is a first spatial resource comprising spatial layer 1 and spatial layer 2, and there are two second spatial resources, the second spatial resource 1 comprising spatial layer 1 and the second spatial resource 2 comprising spatial layer 2. Fig. 14a can be understood as a schematic diagram of the first time-frequency resource and the second time-frequency resource on the spatial layer 1. Fig. 14b can be understood as a schematic diagram of the first time-frequency resource and the second time-frequency resource on the spatial layer 2. Second factor t₅Is a factor of the association of the second time-frequency resource 1 and the second spatial resource 2. Second factor t ₆Is a factor of the association of the second time-frequency resource 2 and the second spatial resource 2. Wherein the first factor t₁And a second factor t₂And the second causeSub-t₅And (4) associating. First factor t₃And a second factor t₄And a second factor t₆And (4) associating.

For the time-frequency resources as shown in fig. 14a and 14b, the indication information needs to indicate 4 first information. First information 1 and a first factor t₁And a second factor t₂In relation, the first information 1 is associated with a second time-frequency resource 1 and a second spatial resource 1. The DMRS1 is associated with a second time-frequency resource 1 and a second spatial resource 1, and thus, the DMRS1 is based on a second factor t₂And carrying out precoding. First information 2 and a first factor t₃And a second factor t₄In relation, the first information 2 is associated with a second time-frequency resource 2 and a second spatial resource 1. The DMRS2 is associated with a second time-frequency resource 2 and a second spatial resource 1, and thus, the DMRS2 is based on a second factor t₄And carrying out precoding. First information 3 and a first factor t₁And a second factor t₅In relation, the first information 3 is associated with the second time-frequency resource 1 and the second spatial resource 2. The DMRS3 is associated with a second time-frequency resource 1 and a second spatial resource 2, and thus, the DMRS3 is based on a second factor t₅And carrying out precoding. First information 4 and a first factor t ₃And a second factor t₆In this regard, the first information 4 relates to the DMRS4, and the first information 4 is associated with the second time-frequency resource 2 and the second spatial resource 2. The DMRS4 is associated with a second time-frequency resource 2 and a second spatial resource 2, and thus, the DMRS4 is based on a second factor t₆And carrying out precoding.

In one possible implementation, the first information is a difference between the first factor and a second factor associated with the first factor, or the first information is a quotient between the first factor and the second factor associated with the first factor. Based on the possible implementation, the terminal device is facilitated to accurately detect the data on the first time-frequency resource and the first space resource.

For example, take fig. 14a as an example. First information 1 and a first factor t₁And a second factor t₂It is related. The first information 1 may be a first factor t₁And a second factor t₂The difference between them. Alternatively, the first information 1 may be the first factor t₁And a second factor t₂The quotient between.

For example, if the first factor t₁Is composed of

Second factor t₂Is composed of

Or, the first factor t₁Is composed of

Second factor t₂Is composed of

The first information 1 may be a first factor t₁And a second factor t₂The difference between them. E.g. the first information 1 may be equal to t₁-t₂Or is equal to t₂-t₁. If the first factor t ₁Is composed of

Second factor t₂Is composed of

The first information 1 may be a first factor t₁And a second factor t₂The quotient between. The first information 1 may be equal to

Or is equal to

Optionally, the first information 1 may also be equal to t₁+t₂Or the first information 1 may also be equal to t₁*t₂。

Similarly, the first information 2 is the first factor t₃And a second factor t₄It is related. The first information 2 may be a first factor t₃And a second factor t₄The difference between them. Alternatively, the first information 2 mayIs a first factor t₃And a second factor t₄The quotient between. Alternatively, the first information 2 may be a first factor t₃And a second factor t₄And (4) summing. Alternatively, the first information 2 may be a first factor t₃And a second factor t₄The product between them.

In one implementation, a second factor may be associated with one or more first factors.

In one possible implementation, the first information indicated by the indication information is information in a first information set. The first set of information may also be referred to as a candidate set of information. The network device and the terminal device may quantize the first set of information based on Q bits, Q being an integer greater than 0. The first information set comprises N-2^QFirst information. Obtaining the first information set based on Q bit quantization means selecting N-2 from 0-2 pi ^QFirst information. Wherein, Q may be predefined by a protocol or notified to the terminal device by the network device.

Optionally, the terminal device may also obtain the first information set without quantization based on Q bits. For example, after the network device obtains the first information set based on Q-bit quantization, the first information set may be configured to the terminal device. Alternatively, the first set of information may be protocol pre-specified.

Optionally, the network device and/or the terminal device may obtain the first information set by uniformly quantizing Q bits, that is, selecting N-2 with equal intervals from 0 to 2 pi^QA value. The principle of quantizing the first information set by the network device and/or the terminal device is the same as the principle of quantizing the factor set by the network device and/or the terminal device in the above method embodiment, and is not described herein again.

Optionally, each value in the first information set may correspond to an index of the first information, and the indication information may specifically indicate the index of the first information when the indication information indicates the first information. Or, each first information in the first information set corresponds to a parameter value used for determining the first information, and the indication information may specifically indicate an index of the parameter value. The terminal device can thus determine the corresponding first information based on the parameter value indicated by the indication information. Optionally, the indication information may indicate the first information in an order of first space resources and then first time-frequency resources. Alternatively, the first information may be indicated in an order of first time-frequency resources and then space resources. The principle of the network device indicating the first information is the same as the principle of the network device indicating the first factor in the above method embodiment, and is not described herein again.

2402. The network equipment precodes at least one reference signal and sends the precoded at least one reference signal to the terminal equipment.

2403. And the network equipment precodes the data on the second time-frequency resource and the second space resource based on the second factor and sends the precoded data on the second time-frequency resource.

2404. The network device precodes data on the first time-frequency resource and the first space resource based on the first factor, and transmits the precoded data on the first time-frequency resource.

For specific implementation manners of step 2402 to step 2404, reference may be made to the specific implementation manners of step 1301 to step 1303 in the method embodiment described in fig. 13, which are not described herein again.

2405. The terminal equipment detects data on a second time-frequency resource and a second space resource which are associated with the reference signal based on the reference signal.

2406. And the terminal equipment detects data pre-coded by a first factor related to the first information based on the first information and a target reference signal in at least one reference signal, wherein a second time-frequency resource and a second space resource related to the target reference signal are a second time-frequency resource and a second space resource related to the first information.

Step 2405 and step 2406 may be performed simultaneously, or step 2405 may be performed before step 2406, or step 2405 may be performed after step 2406.

The present solution is further illustrated by the following specific examples:

assume that there are two second spatial resources, one first spatial resource. The second spatial resource 1 includes a spatial layer 1 and the second spatial resource 2 includes a spatial layer 2. The first spatial resource includes a spatial layer 1 and a spatial layer 2. Fig. 14a is a schematic diagram of the second time-frequency resource and the first time-frequency resource on the spatial layer 1. Fig. 14b is a schematic diagram of the second time-frequency resource and the first time-frequency resource on the spatial layer 2.

The network device sends indication information to the terminal device, and for the time-frequency resources shown in fig. 14a and 14b, the indication information needs to indicate 4 pieces of first information. Wherein, the first information 1 and the first factor t₁And a second factor t₂In relation, the first information 1 is associated with a second time-frequency resource 1 and a second spatial resource 1. First information 2 and a first factor t₃And a second factor t₄In relation, the first information 2 is associated with a second time-frequency resource 2 and a second spatial resource 1. First information 3 and a first factor t₁And a second factor t₅In relation to this, the first information 3 is associated with a second time-frequency resource 1 and a second spatial resource 2. First information 4 and a first factor t ₃And a second factor t₆In relation to this, the first information 4 is associated with the second time-frequency resource 2 and the second spatial resource 2.

The first information 1 is t₁-t₂Or the first information 1 is

The first information 2 is t₃-t₄Or the first information 2 is

The first information 3 is t₁-t₅Or the first information 3 is

The first information 4 is t₃-t₆Or the first information 4 is

The DMRS1 is associated with a second time-frequency resource 1 and a second space resource 1, and the network device uses a second factor t for the DMRS1 corresponding to the space 1₂To carry outAnd (4) precoding. The network device transmits the precoded DMRS1 at symbol 0. The network equipment adopts a second factor t to the data on the second time-frequency resource 1 and the spatial layer 1₂And precoding, and sending the precoded data in the second time-frequency resource 1. The network device adopts a first factor t for data on a first time-frequency resource 1 and a spatial layer 1₁And precoding is carried out, and the precoded data are sent in the first time-frequency resource 1. Similarly, DMRS2 is associated with a second time-frequency resource 2 and a second spatial resource 1, and the network device uses a second factor t for DMRS2 corresponding to space 1₄And carrying out precoding. The network device transmits the precoded DMRS2 at symbol 7. The network device adopts a second factor t for the data on the second time-frequency resource 2 and the spatial layer 1 ₄And precoding is carried out, and the precoded data is sent out from the second time-frequency resource 2. The network device adopts a first factor t for the data on the first time-frequency resource 2 and the spatial layer 1₃And precoding is carried out, and the precoded data are sent in the first time-frequency resource 2. The principle of the network device transmitting the DMRS and the data on the spatial layer 2 is the same as the principle of the network device transmitting the DMRS and the data on the spatial layer 1, and is not described herein again.

After receiving the indication information, the terminal device determines first information 1 to first information 4. After the terminal device detects the precoded DMRS1 on the spatial layer 1, an equivalent channel matrix corresponding to the second time-frequency resource 1 and the spatial layer 1 is obtained based on the DMRS 1. The terminal device obtains the equivalent channel matrixes corresponding to the first time-frequency resource 1 and the spatial layer 1 based on the first information 1 and the equivalent channel matrixes corresponding to the second time-frequency resource 1 and the spatial layer 1, and further detects data on the first time-frequency resource 1 and the spatial layer 1 based on the equivalent channel matrixes corresponding to the first time-frequency resource 1 and the spatial layer 1. And the terminal equipment detects data on the second time-frequency resource 1 and the spatial layer 1 based on the equivalent channel matrixes corresponding to the second time-frequency resource 1 and the spatial layer 1. After the terminal device detects the precoded DMRS2 on the spatial layer 1, an equivalent channel matrix corresponding to the second time-frequency resource 2 and the spatial layer 1 is obtained based on the DMRS 2. The terminal device obtains the equivalent channel matrix corresponding to the first time-frequency resource 2 and the spatial layer 1 based on the first information 2 and the equivalent channel matrix corresponding to the second time-frequency resource 2 and the spatial layer 1, and further detects data on the first time-frequency resource 2 and the spatial layer 1 based on the equivalent channel matrix corresponding to the first time-frequency resource 2 and the spatial layer 1. And the terminal equipment detects data on the second time-frequency resource 2 and the spatial layer 1 based on the equivalent channel matrix corresponding to the second time-frequency resource 2 and the spatial layer 1. The principle of the terminal device detecting data on the spatial layer 2 is the same as the principle of the network device detecting data on the spatial layer 1, and is not described herein again.

Taking DMRS on symbol 0 as an example, 3 specific implementations that the terminal device detects data precoded based on the first factor based on the DMRS and the first information, and the terminal device detects data precoded based on the second factor based on the DMRS are described in detail below.

Firstly, the network equipment is assumed to carry out precoding on data by adopting a THP precoding algorithm. The network device may employ linear precoding for the DMRS symbol on symbol 0. For the kth terminal device, for a set of time-frequency resources, assume

Or

And the second time-frequency resource is a second factor corresponding to the second time-frequency resource and the l spatial layer. The DMRS symbol vectors corresponding to all terminal devices sent by the network device are

wherein

And indicating the DMRS symbol vector corresponding to the kth terminal equipment. The precoding procedure for DMRS on symbol 0 may be:

wherein, the Q matrix is obtained by QR decomposition of the conjugate transpose matrix of the complete channel matrix H of all the terminal equipment, namelyH^HQR. T is a block diagonal matrix

And the second factor matrix is corresponding to the kth terminal equipment. For the kth terminal equipment, corresponding to L_kA spatial layer corresponding to a DMRS symbol vector of

wherein

And the DMRS symbol corresponding to the ith DMRS port of the kth terminal corresponds to the ith spatial layer of the kth terminal. In general, if reference signal ports corresponding to different terminal devices are orthogonal ports, a DMRS precoding process corresponding to a kth terminal device may be:

wherein ,Q_kAnd representing a precoding vector or a precoding sub-matrix corresponding to the kth terminal equipment in the Q matrix. Q_kCorresponding to a partial column vector of the matrix Q, i.e. Q ═ Q₁,Q₂,…,Q_K]，

And representing a second factor matrix corresponding to the kth terminal device, wherein the main diagonal element of the second factor matrix corresponds to a second factor corresponding to each spatial layer of the kth terminal device. The DMRS symbol vector received by the kth terminal device may be represented as:

wherein ,H_kAnd the channel matrix is corresponding to the kth terminal equipment. Reference signal symbol vector

The channel estimation method is known to the transceiving end, so that the equivalent channel matrix corresponding to the second time-frequency resource can be obtained through a channel estimation algorithm

For equivalent channel matrix

Is assumed to have its main diagonal element as

wherein r_llIs the main diagonal element in the R matrix corresponding to the ith spatial layer of the kth terminal device. The R matrix obtains H by carrying out QR decomposition on the conjugate transpose matrix of the complete channel matrix H of all the terminal equipment^H＝QR。

For the kth terminal device, for one time-frequency resource set, based on the foregoing formula (10), the data symbols received by the kth terminal device on the second time-frequency resource 1 and the l spatial layer may be represented as:

wherein

Is a diagonal matrix G^-1And the diagonal element corresponding to the ith spatial layer of the kth terminal device. Equivalent channel coefficients for DMRS estimation

Is equal to

Through the notification signaling sent by the network device, the terminal device can acquire the power factor difference between DMRS precoding and data precoding, that is, the difference between α and β. Based on the power factor difference, the terminal device may determine

Terminal equipment is based on equivalent channel matrix

And receiving the symbol

In conjunction with the mold operation, data transmitted by the network device on the second time-frequency resource 1 and the l-th spatial layer can be detected.

In the same way, suppose

Or

A first factor corresponding to the first time-frequency resource and the l spatial layer. Based on the foregoing formula (10), the data symbols received by the kth terminal device on the first time-frequency resource 1 and the l spatial layer can be represented as:

in one implementation, the first time-frequency resource and the second time-frequency resource are closer in time domain and frequency domain, so that the channel state information is closer. Can generally satisfy

Terminal equipment is based on

And the first information can be determined

Based on the above formula (34), the terminal device is based on the equivalent channel matrix

And receiving the symbol vector

The data transmitted by the network device on the first time-frequency resource 1 and the l-th spatial layer can be detected by combining the mold operation.

Equivalent channel matrix corresponding to the terminal equipment based on the second time-frequency resource 1 and the spatial layer 1

And the first information 1 detects data on the first time-frequency resource 1 and the spatial layer 1 as an example. If t is₁Is composed of

t₂Is composed of

The first information 1 is

Then it is determined that,

if t is₁Is composed of

t₂Is composed of

The first information 1 is

Then it is determined that,

if t is₁Is composed of

t₂Is composed of

The first information 1 is

Then it is determined that,

terminal equipment is based on equivalent channel matrix

And receiving the symbol vector

Data transmitted by the network device on the first time-frequency resource 1 and the spatial layer 1 can be detected. The terminal equipment is based on the equivalent channel matrix corresponding to the second time-frequency resource 1 and the spatial layer 2

The same thing as the first information 3 detects data on the first time-frequency resource 1 and the spatial layer 2 is not described herein.

And secondly, the network equipment is assumed to carry out precoding on the data by adopting a THP precoding algorithm. The network device may employ linear precoding for DMRS on symbol 0. For the kth terminal device, for a set of time-frequency resources, assume

Or

And the second time-frequency resource is a second factor corresponding to the second time-frequency resource and the l spatial layer. The DMRS symbol vector transmitted by the network equipment is

The precoding procedure of DMRS on symbol 0 is:

the Q matrix is obtained by carrying out QR decomposition on the conjugate transpose matrix of the complete channel matrix H of all the terminal equipment. The matrix B may be expressed as B ═ GR ^H. The G matrix is a diagonal matrix whose main diagonal elements are the inverse of the main diagonal elements of the R matrix, i.e. the G matrix is a diagonal matrix

In general, the reference signal ports corresponding to different terminal devices are orthogonal ports, and for the kth terminal device, L corresponds to_kA spatial layer corresponding to DMRS symbol vector of

The DMRS precoding process corresponding to the kth terminal device may be:

wherein ,F_kExpress matrix F ═ QB^-1And the precoding vector or the precoding submatrix corresponding to the kth terminal equipment. F_kCorresponding to a partial column vector of matrix F.

wherein ,H_kFor the kth terminalAnd preparing a corresponding channel matrix.

Is a diagonal matrix whose diagonal elements are the matrix G^-1And (4) elements corresponding to the spatial layer corresponding to the kth terminal device. For the ith spatial layer of the kth terminal device, the received DMRS symbol may be represented as:

wherein

To represent

Row, column, middle, due to DMRS1 symbol vector

The channel estimation method is known to the transceiving end, so that the equivalent channel corresponding to the ith spatial layer of the kth terminal device can be obtained through a channel estimation algorithm

Through the notification signaling sent by the network device, the terminal device can know the power factor difference between DMRS1 precoding and data precoding, that is, the difference between α and β. Based on the power factor difference, the terminal device may determine the equivalent channel matrix corresponding to the second time-frequency resource 1 and the l spatial layer

The estimation result of (2). Based on the above equation (33), the terminal device is based on the equivalent channel matrix

And receiving the symbol

Data sent by the network device on the second time-frequency resource 1 and the ith spatial layer can be detected.

Terminal equipment is based on

And the first information can be determined

And receiving the symbol vector

Data transmitted by the network device on the first time-frequency resource 1 and the l-th spatial layer can be detected. Terminal equipment is based on

And first information determination

Is based on

And first information determination

The principle of (A) is the same, and the description is omitted here.

And thirdly, the network equipment is assumed to precode the data by adopting EZF precoding algorithm. For the kth terminal device, for a set of time-frequency resources, assume

Or

A second factor corresponding to the second time-frequency resource and the l spatial layer. The symbol vector of the DMRS transmitted by the transmitting end at the symbol 0 is

The network device precoding DMRS process may be represented as:

wherein the W matrix is based on the complete channel matrix of all terminal devices

Thus obtaining the compound. If the linear precoding adopts EZF algorithm, the channel matrix of the kth terminal device is H_kIts corresponding maximum L_kThe feature vector corresponding to each feature value is

wherein V_kDimension of (A) is N_T×L_kIs the channel matrix is H_kAnd performing SVD decomposition or EVD decomposition. The linear precoding matrix can be represented as: q ═ V (V)^HV+δI)^-1. wherein

Corresponding from K terminal devices

Spliced matrix with dimension N_TL is multiplied by L. Delta is an adjustment factor, which is related to the signal-to-noise ratio. β is a power normalization factor, or a power adjustment factor. In general, the reference signal ports corresponding to different terminal devices are orthogonal ports. For the kth terminal equipment, corresponding to L_kA spatial layer corresponding to a DMRS symbol vector of

The DMRS precoding process corresponding to the kth terminal device may be:

wherein ,W_kAnd representing a pre-code vector or a pre-coding sub-matrix corresponding to the kth terminal equipment in the Q matrix. W_kCorresponding to a partial column vector of matrix W.

And representing a second factor matrix corresponding to the kth terminal device, wherein the main diagonal element of the second factor matrix corresponds to a second factor corresponding to each spatial layer of the kth terminal device. The symbol vector of the DMRS received by the kth terminal device may be represented as:

wherein ,H_kAnd the channel matrix is corresponding to the kth terminal equipment.

Representing an equivalent channel matrix.

Representing an equivalent interference signal.

Due to the reference signal symbol vector

The estimation result of (2).

Suppose that the data symbol corresponding to the kth terminal device sent by the network device on the second time-frequency resource 1 and the second space resource is

Based on the foregoing equation (14), the data symbol vector received by the terminal device on the second time-frequency resource 1 and the second spatial resource can be represented as:

based on the above formula (42), the terminal device can know that the terminal device is based on the equivalent channel matrix

And receiving the symbol

Data sent by the network device on the second time-frequency resource 1 and the second spatial resource can be detected.

In the same way, the method for preparing the composite material,

a first factor corresponding to the first time-frequency resource and the l spatial layer, or

A factor corresponding to the first time-frequency resource and the l spatial layer, or

A first factor corresponding to the first time-frequency resource and the l spatial layer. The data symbol vector sent by the network device on the first time-frequency resource 1 and the first space resource is

Based on the foregoing equation (14), the data symbol vector received by the terminal device on the first time-frequency resource 1 and the first spatial resource can be represented as:

if t is₁Is composed of

t₂Is composed of

The first information 1 is

Then, for

Row and column element of (1)

Satisfy the requirement of

If t is₁Is composed of

t₂Is composed of

The first information 1 is

Then, for

Row and column element of (1)

Satisfy the requirement of

If t is₁Is composed of

t₂Is composed of

The first information 1 is

Then, for

Row and column element of (1)

Satisfy the requirement of

Terminal equipment is based on equivalent channel matrix

And receiving the symbol

Data transmitted by the network device on the first time frequency resource 1 and the first space resource can be detected.

It can be seen that by implementing the method described in fig. 24, the network device may indicate the first information related to the first factor by the indication information and carry the second factor by the reference signal, which is beneficial to saving signaling overhead.

Referring to fig. 25, fig. 25 is a schematic flowchart of another data detection method according to an embodiment of the present application. The data detection method shown in fig. 25 is different from the data detection method shown in fig. 24 in that, in the data detection method shown in fig. 25, the first information is not notified to the terminal device by additionally transmitting the indication information, but is carried by the reference signal. As shown in fig. 25, the data detection method includes operations 2501 to 2506 as follows. Wherein:

2501. The network equipment precodes at least one second reference signal and sends the precoded at least one second reference signal to the terminal equipment.

A second time-frequency resource and a second spatial resource are associated with a second reference signal, data on the second time-frequency resource and the second spatial resource are associated with a second factor, the second factor is a scalar for precoding the data associated with the second factor, the second time-frequency resource comprises one or more frequency-domain resource groups, and the second spatial resource comprises one or more spatial layers. Data on a first time-frequency resource and a first spatial resource is associated with a first factor, different first time-frequency resources and data on the first spatial resource are associated with first factors that are independently determined, the first factors are scalars used for precoding data associated with the first factors, a first time-frequency resource comprises one or more frequency-domain resource groups, and a first spatial resource comprises one or more spatial layers. In the embodiment of the present application, for the related descriptions of the first time-frequency resource, the first spatial resource, the second time-frequency resource, the second spatial resource, the reference signal, the first factor, and the second factor, reference may be made to the descriptions in the embodiments corresponding to fig. 5, fig. 11, and fig. 13, which are not repeated herein.

In this embodiment, the network device performs precoding on a second reference signal associated with a second time-frequency resource and a second space resource based on a second factor associated with data on the second time-frequency resource and the second space resource. That is, the second factor associated with data on the second time-frequency resource and the second spatial resource is also used to precode a second reference signal associated with the second time-frequency resource and the second spatial resource. For a specific implementation manner of the network device precoding the second reference signal based on the second factor, reference may be made to the specific implementation manner of the network device precoding the reference signal based on the second factor in the embodiment of the method corresponding to fig. 13, which is not described herein again.

2502. The network equipment precodes at least one first reference signal and sends the precoded at least one first reference signal to the terminal equipment.

Wherein one first reference signal is precoded based on one first information. In the embodiment of the present application, for the description of the first information, reference may be made to the description in the embodiment corresponding to fig. 24, which is not described herein again.

Wherein, step 2501 and step 2502 may be performed simultaneously, or step 2501 may be performed before step 2502, or step 2501 may be performed after step 2502.

2503. And the network equipment precodes the data on the second time-frequency resource and the second space resource based on the second factor and sends the precoded data on the second time-frequency resource.

2504. The network device precodes data on the first time-frequency resource and the first space resource based on the first factor, and transmits the precoded data on the first time-frequency resource.

For specific implementation manners of step 2503 and step 2504, reference may be made to the specific implementation manners of step 1302 and step 1303 in the method embodiment described in fig. 13, which are not described herein again.

2505. The terminal device detects data on a second time-frequency resource and a second space resource associated with a second reference signal based on the second reference signal.

In the embodiment of the application, after receiving at least one second reference signal, the terminal device detects data precoded based on a second factor through the reference signal precoded by the second factor.

2506. And the terminal equipment detects data precoded based on a first factor related to the first information based on a target reference signal in at least one second reference signal and the first reference signal precoded through the first information, wherein a second time-frequency resource and a second space resource related to the target reference signal are a second time-frequency resource and a second space resource related to the first information.

In the embodiment of the application, after receiving at least one second reference signal and at least one first reference signal, the terminal device detects data precoded based on a first factor related to the first information based on a target reference signal and the first reference signal precoded by the first information.

Wherein, step 2505 and step 2506 may be performed simultaneously, or step 2505 may be performed before step 2506, or step 2505 may be performed after step 2506.

For example, assume that there are two second spatial resources and one first spatial resource. The second spatial resource 1 includes a spatial layer 1 and the second spatial resource 2 includes a spatial layer 2. The first spatial resource includes a spatial layer 1 and a spatial layer 2. Fig. 26a shows the second time-frequency resources and the first time-frequency resources on spatial layer 1. Fig. 26b shows the second time-frequency resources and the first time-frequency resources on the spatial layer 2. The network equipment adopts a second factor t to the data on the second time frequency resource 1 and the second space resource 1₂And carrying out precoding. The second time-frequency resource 1 and the second space resource 1 are associated with DMRS1, and the network device passes a second factor t to DMRS1₂And carrying out precoding. Network equipment passes first information 1 (namely t) to DMRS2 ₁-t₂) Pre-coding is carried out, and a first factor t is adopted for data on a first time-frequency resource 1 and a first space resource 1₁And carrying out pre-coding. The first information 1 is associated with a second time-frequency resource 1 and a second spatial resource 1.

The network device applies a second factor t to the data on the second time-frequency resource 1 and the second space resource 2₃And carrying out precoding. The second time-frequency resource 1 and the second space resource 2 are associated with DMRS3, and the network device passes a second factor t to DMRS3₃And carrying out precoding. Network equipment passes first information 2 (i.e. t) to DMRS4₁-t₃) And carrying out precoding. The first information 2 is associated with a second time-frequency resource 1 and a second spatial resource 2.

After the terminal device receives the DMRS1, an equivalent channel matrix corresponding to the second time-frequency resource 1 and the second spatial resource 1 is obtained based on the DMRS 1. And the terminal equipment detects data on the second time-frequency resource 1 and the second space resource 1 based on the equivalent channel matrixes corresponding to the second time-frequency resource 1 and the second space resource 1. The terminal device obtains the equivalent channel matrixes corresponding to the first time-frequency resource 1 and the spatial layer 1 based on the equivalent channel matrixes corresponding to the second time-frequency resource 1 and the second spatial resource 1 and the DMRS 2. The terminal device detects data on the first time-frequency resource 1 and the spatial layer 1 based on the equivalent channel matrix corresponding to the first time-frequency resource 1 and the spatial layer 1.

After the terminal device receives the DMRS3, an equivalent channel matrix corresponding to the second time-frequency resource 1 and the second spatial resource 2 is obtained based on the DMRS 3. And the terminal equipment detects data on the second time-frequency resource 1 and the second space resource 2 based on the equivalent channel matrixes corresponding to the second time-frequency resource 1 and the second space resource 2. The terminal device obtains the equivalent channel matrixes corresponding to the first time-frequency resource 1 and the spatial layer 2 based on the equivalent channel matrixes corresponding to the second time-frequency resource 1 and the second spatial resource 2 and the DMRS 4. And the terminal equipment detects data on the first time-frequency resource 1 and the spatial layer 2 based on the equivalent channel matrixes corresponding to the first time-frequency resource 1 and the spatial layer 2.

For a specific implementation manner of the terminal device detecting data on the second time-frequency resource 1 and the second spatial resource, reference may be made to the description in the embodiment corresponding to fig. 24, which is not described herein again.

It is assumed that the network device precodes data with the THP precoding algorithm. The terminal device k may obtain the first information 1 based on the DMRS 2. In one implementation, the DMRS2 may employ zero-forcing precoding, i.e., the precoding matrix satisfies W ═ H^H(HH^H+σ²I)^-1. Where H is the channel matrix corresponding to all users, I is the identity matrix, σ²To adjust the factor, it is related to the noise power, and/or the interference power. First information and

It is relevant. And based on the first information 1 and the equivalent channel matrix corresponding to the second time-frequency resource 1 and the spatial layer 1

Determining an equivalent channel matrix corresponding to the first time-frequency resource 1 and the spatial layer 1

The terminal equipment is based on the first information 1, the second time frequency resource 1 and the equivalent channel matrix corresponding to the spatial layer 1

For a specific implementation of this embodiment, reference may be made to the description in the embodiment corresponding to fig. 24, which is not described herein again. Based on the above formula (34), the terminal device is based on the equivalent channel matrix

And receiving the symbol vector

The data on the first time-frequency resources 1 and the spatial layer 1 can be detected. The same principle for the terminal device to detect the data on the first time-frequency resource 1 and the spatial layer 2 is also applied, which is not described herein again.

Assume that the network device precodes the data with EZF precoding algorithm. The terminal device may obtain the first information 1 based on the DMRS2, obtain the first information 2 based on the DMRS4, and obtain the equivalent channel matrix corresponding to the first information 1, the first information 2, the second time-frequency resource 1, and the second spatial resource

Determining an equivalent channel matrix corresponding to the first time-frequency resource 1 and the first space resource

The terminal equipment determines a first time-frequency resource 1 and an equivalent channel matrix corresponding to a first space resource

For a specific implementation manner of this embodiment, reference may be made to the description in the method embodiment corresponding to fig. 24, which is not described herein again. Terminal equipment is based on equivalent channel matrix

And receiving the symbol

Data transmitted by the network device on the first time-frequency resource 1 and the first space resource can be detected.

Referring to fig. 27, fig. 27 is a schematic flowchart of a data detection method according to an embodiment of the present disclosure. The data detection method shown in fig. 27 is different from the data detection method shown in fig. 24 in that, in the data detection method shown in fig. 27, the indication information indicates not the first information but the first factor. As shown in fig. 27, the data detection method includes operations 2701 to 2706 as follows. Wherein:

2701. the network equipment sends indication information to the terminal equipment, wherein the indication information is used for indicating at least one first factor.

2702. The network equipment precodes at least one reference signal and sends the precoded at least one reference signal to the terminal equipment.

In the embodiment of the present application, the time-frequency resources of the downlink data scheduled by the network device are divided into one or more first time-frequency resources and one or more second time-frequency resources. Wherein a second time-frequency resource and a second space resource are associated with a reference signal, data on the second time-frequency resource and the second space resource are associated with a second factor, the second factor is a scalar for precoding the data associated with the second factor, the second time-frequency resource comprises one or more frequency-domain resource groups, and the second space resource comprises one or more spatial layers. Data on a first time-frequency resource and a first spatial resource is associated with a first factor, different first time-frequency resources and data on the first spatial resource are associated with first factors that are independently determined, the first factors are scalars used for precoding data associated with the first factors, a first time-frequency resource comprises one or more frequency-domain resource groups, and a first spatial resource comprises one or more spatial layers. In the embodiment of the present application, for the related descriptions of the first time-frequency resource, the first spatial resource, the second time-frequency resource, the second spatial resource, the reference signal, the first factor, and the second factor, reference may be made to the descriptions in the embodiments corresponding to fig. 5, fig. 11, and fig. 13, which are not repeated herein.

2703. The network device precodes data on the second time frequency resource and the second space resource based on the second factor, and transmits the precoded data on the second time frequency resource.

2704. The network equipment precodes data on the first time-frequency resource and the first space resource based on the first factor, and transmits the precoded data on the first time-frequency resource.

2705. The terminal equipment detects data on a second time-frequency resource and a second space resource which are associated with the reference signal based on the reference signal.

The specific implementation manners of step 2702 to step 2705 may refer to the specific implementation manners of step 1301 to step 1304, which are not described herein again.

2706. The terminal device detects data precoded based on the first factor.

Step 2705 and step 2706 may be executed simultaneously, or step 2705 may be executed before step 2706, or step 2705 may be executed after step 2706.

For example, assume that there is one second spatial resource and one first spatial resource. The second spatial resource includes a spatial layer 1, and the first spatial resource includes the spatial layer 1. Fig. 28 illustrates the second time-frequency resource and the first time-frequency resource on the spatial layer 1. The network device passes the second factor t to the DMRS1 ₂Precoding and using a second factor t on a second time-frequency resource and spatial layer 1₂And carrying out precoding. The network equipment sends indication information to the terminal equipment, and the indication information indicates the first factor t₁And the network device uses the first factor t on the first time-frequency resources and spatial layer 1₁And carrying out precoding.

After the terminal device receives the DMRS1, the terminal device detects the second time-frequency resource and data on spatial layer 1 through DMRS 1. For a specific implementation principle, please refer to the corresponding description in the embodiment corresponding to fig. 24, which is not described herein again.

The terminal equipment receives the first factor t₁Then, an equivalent channel matrix corresponding to the first time-frequency resource and the spatial layer 1 may be predicted based on the DMRS2, and the first factor t and the equivalent channel matrix corresponding to the first time-frequency resource and the spatial layer 1 may be obtained₁The first time-frequency resources and the data on spatial layer 1 are detected. For a specific implementation principle that the terminal device predicts the first time-frequency resource and the equivalent channel matrix corresponding to the spatial layer 1 based on the DMRS2, please refer to the corresponding description in the embodiment corresponding to fig. 11, which is not described herein again.

Referring to fig. 29, fig. 29 is a schematic flowchart of another data detection method according to an embodiment of the present application. The difference between the data detection method shown in fig. 29 and the data detection method shown in fig. 11 is that in the data detection method shown in fig. 29, all the factors corresponding to the time-frequency resources and the spatial layers are carried by the reference signals, and no additional signaling is required to notify the first factor. As shown in fig. 29, the data detection method includes operations 2901 through 2903 as follows. Wherein:

2901. The network equipment precodes at least one reference signal and sends the precoded at least one reference signal to the terminal equipment.

A first time-frequency resource and a first spatial resource are associated with a reference signal, data on a first time-frequency resource and a first spatial resource are associated with a first factor, different first time-frequency resources and data on the first spatial resource are associated with independently determined first factors, the first factors are scalars for precoding data associated with the first factors, a first time-frequency resource comprises one or more groups of frequency-domain resources, a first spatial resource comprises one or more spatial layers. For the description of the first time-frequency resource, the first spatial resource and the first factor, reference may be made to the description in the embodiment corresponding to fig. 5, which is not repeated herein.

The network equipment performs precoding on a reference signal associated with a first time-frequency resource and a first space resource by using a first factor associated with data on the first time-frequency resource and the first space resource.

In one possible implementation, one RB includes a plurality of first time-frequency resources. By dividing an RB into a plurality of first time-frequency resources, the first time-frequency resources only contain fewer time-frequency resources. Different first time-frequency resources correspond to different factors, and fine factor adjustment is facilitated, so that power efficiency improvement brought by the factors is improved as much as possible.

In one possible implementation, the reference signals corresponding to different first time-frequency resources may be the same type of reference signal, or may be different types of reference signals.

For example, as shown in fig. 30, it is assumed that there are 2 first time-frequency resources and 2 first spatial resources. Each first spatial resource includes a spatial layer. Each of the first time-frequency resources includes a frequency domain length of 4 RBs in a frequency domain, and the frequency domain resource of each of the first time-frequency resources is different. Each bin represents an RB in the frequency domain dimension in fig. 30. The time domain resources of each first time frequency resource are the same, and each first time frequency resource comprises one or more time units in the time domain. Since the time domain resources of each first time-frequency resource are the same, fig. 30 shows only the frequency domain dimension and the spatial domain dimension, and does not show the time domain dimension. As shown in fig. 30, a white lattice is used to map the reference signal. Reference signals are taken as DMRS as an example. DMRS1 is mapped on spatial layer 1 and the first RB, DMRS2 is mapped on spatial layer 2 and the first RB, DMRS3 is mapped on spatial layer 1 and the fifth RB, and DMRS4 is mapped on spatial layer 2 and the fifth RB.

The first time-frequency resource 1 and the data on spatial layer 1 are associated with a factor of 1. The first time-frequency resources 2 and the spatial layer 1 are associated with a factor of 2. The first time-frequency resources 1 and the spatial layer 2 are associated with a factor 3. The first time-frequency resources 2 and the spatial layer 2 are associated with a factor 4.

The network device precodes the DMRS1 with a factor of 1, the network device precodes the DMRS2 with a factor of 3, the network device precodes the DMRS3 with a factor of 2, and the network device precodes the DMRS4 with a factor of 4.

And the network equipment transmits the precoded DMRS 1-DMRS 4 to the terminal equipment. After receiving the DMRSs 1 to 4, the terminal device detects data on the first time-frequency resource 1 and the spatial layer 1 based on the DMRSs 1. Data on the first time-frequency resource 1 and the spatial layer 2 is detected based on the DMRS 2. Data on the first time-frequency resource 2 and the spatial layer 1 is detected based on the DMRS 3. Data on the first time-frequency resource 2 and the spatial layer 2 is detected based on the DMRS 4.

For a specific implementation manner of the terminal device detecting data on the first time-frequency resource and the spatial layer based on the DMRS, refer to the specific implementation manner of the terminal device detecting data on the second time-frequency resource 1 and the second spatial resource based on the DMRS in the method embodiment corresponding to fig. 24, which is not described herein again.

2902. The network equipment precodes data on the first time-frequency resource and the first space resource based on the first factor, and transmits the precoded data on the first time-frequency resource.

2903. The terminal device detects data on the first time-frequency resource and the first spatial resource based on a reference signal associated with the first time-frequency resource and the first spatial resource.

In the embodiment of the present application, after receiving at least one reference signal, the terminal device detects data on the first time-frequency resource and the first spatial resource based on the reference signal associated with the first time-frequency resource and the first spatial resource.

It can be seen that based on the method described in fig. 29, the network device can complete the detection of the data on the first time-frequency resource and the first space resource without indicating the first factor through an additional signaling, which is beneficial to saving signaling overhead.

Referring to fig. 31, fig. 31 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication apparatus shown in fig. 31 may be configured to perform part or all of the functions of the terminal device in the method embodiments described in fig. 5, 11, 13, 24, 25, 27, and 29. The device may be a terminal device, or a device in the terminal device, or a device capable of being used in cooperation with the terminal device. The communication device can also be a chip system. The communication apparatus shown in fig. 31 may include a communication unit 3101 and a processing unit 3102. Among them, the processing unit 3102 is used to perform data processing. The communication unit 3101 is integrated with a receiving unit and a transmitting unit. The communication unit 3101 may also be referred to as a transceiver unit. Alternatively, communication section 3101 may be divided into a reception section and a transmission section. The processing unit 3102 and the communication unit 3101 are similar and will not be described in detail below. Wherein:

A communication unit 3101 configured to detect data on a first time-frequency resource and a first spatial resource, the data on one first time-frequency resource and one first spatial resource being associated with a first factor, the data on a different first time-frequency resource and the first spatial resource being associated with an independently determined first factor, the first factor being a scalar for precoding the data associated with the first factor, one first time-frequency resource comprising one or more groups of frequency-domain resources, one first spatial resource comprising one or more spatial layers.

In a possible implementation, the communication unit 3101 is further configured to receive at least one precoded reference signal, where a second time-frequency resource and a second spatial resource are associated with one reference signal, and data on the second time-frequency resource and the second spatial resource are associated with a second factor, the second factor being a scalar for precoding the data associated with the second factor, where a second time-frequency resource includes one or more frequency-domain resource groups, and a second spatial resource includes one or more spatial layers; the communication unit 3101 is further configured to detect data on a second time-frequency resource and a second spatial resource associated with a reference signal based on the reference signal.

In a possible implementation, the communication unit 3101 is further configured to receive indication information sent by the network device, where the indication information is used to indicate at least one first information, one first information is related to one first factor, and one first information is associated with one second time-frequency resource and one second space resource; the manner of detecting data on the first time-frequency resource and the first space resource by the communication unit 3101 is specifically: and detecting data pre-coded by a first factor related to the first information based on the first information and a target reference signal in at least one reference signal, wherein a second time-frequency resource and a second space resource associated with the target reference signal are a second time-frequency resource and a second space resource associated with the first information.

In one possible implementation, the first factor relates to one or more of the following: the data on the first time-frequency resource, a first channel matrix corresponding to the first time-frequency resource or a first pre-coding matrix corresponding to the first time-frequency resource; the second factor relates to one or more of the following information: data on the second time frequency resource, a reference signal associated with the second time frequency resource, a second channel matrix corresponding to the second time frequency resource, or a second precoding matrix corresponding to the second time frequency resource. The data on the first time-frequency resource may be transmission data symbols on all corresponding spatial layers on the first time-frequency resource. The data on the second time-frequency resource may be transmission data symbols on all corresponding spatial layers on the second time-frequency resource. The reference signals associated with the second time-frequency resource may be reference signal symbols corresponding to all spatial layers corresponding to the second time-frequency resource.

In a possible implementation, the first time-frequency resource comprises a time-domain resource that is different from a time-domain resource comprised by the second time-frequency resource.

In one possible implementation, the number of first time-frequency resources is predefined by the protocol; alternatively, before receiving the indication information sent by the network device, the communication unit 3101 is further configured to receive configuration information sent by the network device, where the configuration information is used to configure the number of the first time-frequency resources.

In a possible implementation, the terminal device determines, based on the number of time-frequency resources of downlink data and first time-frequency resources scheduled by the network device, a time-frequency resource included in each first time-frequency resource.

In one possible implementation, the number of first space resources is pre-specified by the protocol; alternatively, before receiving the instruction information transmitted by the network device, the communication unit 3101 is further configured to receive configuration information transmitted by the network device, where the configuration information is used to configure the number of the first space resources.

In one possible implementation, the terminal device determines the spatial layers included in each first spatial resource based on the number of spatial layers of the terminal device and the number of the first spatial resources.

is a diagonal matrix, beta is a power adjustment factor,

or

Or

And W is a linear precoding matrix.

is a diagonal matrix, beta is a power adjustment factor,

or

Or

And W is a linear precoding matrix.

is a diagonal matrix, beta is a power adjustment factor,

or

Or

wherein s is(s)₁,s₂,…,s_L)^TWhich is indicative of the data being transmitted,

is a diagonal matrix, beta is a power adjustment factor,

or

Or

or the following steps:

is a diagonal matrix, alpha is a power adjustment factor,

or

Or

In one possible implementation, the communication unit 3101 may further receive at least one second reference signal that is precoded, where a second time-frequency resource and a second spatial resource are associated with a second reference signal, data on the second time-frequency resource and the second spatial resource are associated with a second factor, the second factor is a scalar for precoding the data associated with the second factor, the second time-frequency resource comprises one or more frequency-domain resource groups, and the second spatial resource comprises one or more spatial layers; the communication unit 3101 may further receive at least one first reference signal precoded based on a first information, wherein the first information is associated with a first factor, and wherein the first information is associated with a second time-frequency resource and a second spatial resource; the communication unit 3101 may also detect, based on a second reference signal, data on a second time-frequency resource and a second spatial resource associated with the second reference signal; the specific implementation manner of the communication unit 3101 detecting data on the first time-frequency resource and the first space resource is as follows: and detecting data pre-coded based on a first factor related to the first information based on a target reference signal in at least one second reference signal and the first reference signal pre-coded by the first information, wherein a second time-frequency resource and a second space resource related to the target reference signal are a second time-frequency resource and a second space resource related to the first information.

In a possible implementation, the communication unit 3101 may further receive indication information sent by the network device, where the indication information is used to indicate at least one first factor; the communication unit 3101 may further receive at least one reference signal after precoding, where a second time-frequency resource and a second space resource are associated with one reference signal, and data on the second time-frequency resource and the second space resource are associated with a second factor, where the second factor is a scalar for precoding the data associated with the second factor, where a second time-frequency resource includes one or more frequency-domain resource groups, and a second space resource includes one or more space layers; the communication unit 3101 may also detect data on a second time-frequency resource and a second spatial resource associated with a reference signal based on the reference signal; the specific implementation manner of the communication unit 3101 detecting data on the first time-frequency resource and the first space resource is as follows: data precoded based on the first factor is detected based on the first factor.

In a possible implementation, the communication unit 3101 may further receive indication information sent by the network device, where the indication information is used to indicate at least one first factor; the specific implementation manner of the communication unit 3101 detecting data on the first time-frequency resource and the first space resource is as follows: data precoded based on the first factor is detected based on the first factor.

Optionally, the first spatial resource includes a spatial layer, the at least one first factor indicated by the indication information is a factor in a quantization codebook, the quantization codebook includes P factor vectors, each factor vector is a vector of the quantization codebook, each factor vector includes N factors, the factors of each factor vector are associated with the reference signal ports one by one, and P and N are integers greater than zero; index of the indicator information carrying factor vector; the processing unit 3102 may determine the first factor from the quantization codebook based on the index of the factor vector carried by the indication information and the reference signal port allocated for the terminal device.

In one possible implementation, communication unit 3101 may also receive at least one reference signal that is precoded, one first time-frequency resource and one first space resource being associated with one reference signal; the specific implementation manner of the communication unit 3101 detecting data on the first time-frequency resource and the first space resource is as follows: data on a first time-frequency resource and a first spatial resource is detected based on a reference signal associated with the first time-frequency resource and the first spatial resource.

Referring to fig. 31, fig. 31 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication apparatus shown in fig. 31 may be used to perform part or all of the functions of the network device in the method embodiments described in fig. 5, 11, 13, 24, 25, 27, and 29. The device may be a network device, a device in the network device, or a device capable of being used in cooperation with the network device. Wherein, the communication device can also be a chip system. The communication apparatus shown in fig. 31 may include a communication unit 3101 and a processing unit 3102. Wherein:

a processing unit 3102 configured to precode data on a first time-frequency resource and a first spatial resource based on a first factor; a communication unit 3101 configured to transmit the precoded data on the first time/frequency resource; data on a first time-frequency resource and a first spatial resource is associated with a first factor, different first time-frequency resources and data on the first spatial resource are associated with first factors that are independently determined, the first factors are scalars used for precoding data associated with the first factors, a first time-frequency resource comprises one or more frequency-domain resource groups, and a first spatial resource comprises one or more spatial layers.

In a possible implementation, the processing unit 3102 is further configured to precode at least one reference signal; a communication unit 3101, further configured to send at least one reference signal after precoding to the terminal device, where a second time-frequency resource and a second space resource are associated with one reference signal, data on the second time-frequency resource and the second space resource are associated with a second factor, the second factor is a scalar and is used for precoding the data associated with the second factor, the second time-frequency resource includes one or more frequency-domain resource groups, and the second space resource includes one or more space layers; a processing unit 3102, further configured to precode data on a second time-frequency resource and a second spatial resource based on a second factor; the communication unit 3101 is further configured to transmit the precoded data in the second time-frequency resource.

In a possible implementation, the communication unit 3101 is further configured to send indication information to the terminal device, where the indication information indicates at least one first information, one first information is related to one first factor, and one first information is associated with one second time-frequency resource and one second space resource.

In one possible implementation, the first factor relates to one or more of the following items of information: the data on the first time-frequency resource, a first channel matrix corresponding to the first time-frequency resource or a first pre-coding matrix corresponding to the first time-frequency resource; the second factor relates to one or more of the following information: data on the second time frequency resource, a reference signal associated with the second time frequency resource, a second channel matrix corresponding to the second time frequency resource, or a second precoding matrix corresponding to the second time frequency resource. The data on the first time-frequency resource may be transmission data symbols on all corresponding spatial layers on the first time-frequency resource. The data on the second time-frequency resource may be transmission data symbols on all corresponding spatial layers on the second time-frequency resource. The reference signals associated with the second time-frequency resource may be reference signal symbols corresponding to all spatial layers corresponding to the second time-frequency resource.

In one possible implementation, the at least one first information is an information in a first set of information.

In one possible implementation, the number of first time-frequency resources is predefined by the protocol; alternatively, before the communication unit 3101 transmits the instruction information, it is further configured to transmit configuration information for configuring the number of first time-frequency resources to the terminal device.

In one possible implementation, the processing unit 3102 determines the time-frequency resources included in each first time-frequency resource based on the time-frequency resources of the downlink data scheduled by the network device and the number of the first time-frequency resources.

In one possible implementation, the number of first space resources is pre-specified by the protocol; alternatively, before the communication unit 3101 transmits the instruction information, it is further configured to transmit configuration information for configuring the number of first space resources to the terminal device.

In one possible implementation, the processing unit 3102 determines the spatial layers included by the first spatial resource based on the number of spatial layers of the terminal device and the number of the first spatial resource.

wherein s＝(s₁,s₂,…,s_L)^TWhich is representative of the data signal being transmitted,

is a diagonal matrix, beta is a power adjustment factor,

or

And W is a linear precoding matrix.

wherein s＝(s₁,s₂,…,s_L)^TRepresents the transmitted data signal or reference signal,

is a diagonal matrix, beta is a power adjustment factor,

or

And W is a linear precoding matrix.

is a diagonal matrix, beta is a power adjustment factor,

or

wherein s＝(s₁,s₂,…,s_L) T denotes a data signal to be transmitted,

is a diagonal matrix, beta is a power adjustment factor,

or

or the following steps:

wherein s＝(s₁,s₂,…,s_L)^TWhich is indicative of the reference signal being transmitted,

is a diagonal matrix, alpha is a power adjustment factor,

or

In a possible implementation, the processing unit 3102 is further configured to precode at least one second reference signal; a communication unit 3101, further configured to transmit the at least one second reference signal after precoding to the terminal device, where a second time-frequency resource and a second space resource are associated with a second reference signal, data on the second time-frequency resource and the second space resource are associated with a second factor, the second factor is a scalar and is used for precoding the data associated with the second factor, a second time-frequency resource includes one or more frequency-domain resource groups, and a second space resource includes one or more space layers; a processing unit 3102, further configured to precode at least one first reference signal; a communication unit 3101, further configured to transmit the at least one first reference signal after precoding to the terminal device, wherein a first reference signal is precoded based on a first information, a first information is associated with a first factor, and a first information is associated with a second time-frequency resource and a second space resource; a processing unit 3102, further configured to precode data on a second time-frequency resource and a second spatial resource based on a second factor; the communication unit 3101 is further configured to transmit the precoded data in the second time-frequency resource.

In a possible implementation, the communication unit 3101 is further configured to send indication information to the terminal device, where the indication information is used to indicate at least one first factor; a processing unit 3102, further configured to precode at least one reference signal; a communication unit 3101, further configured to send at least one reference signal after precoding to the terminal device, where a second time-frequency resource and a second space resource are associated with one reference signal, data on the second time-frequency resource and the second space resource are associated with a second factor, the second factor is a scalar and is used for precoding the data associated with the second factor, the second time-frequency resource includes one or more frequency-domain resource groups, and the second space resource includes one or more space layers; a processing unit 3102, further configured to precode data on a second time-frequency resource and a second spatial resource based on a second factor; the communication unit 3101 is further configured to transmit the precoded data in a second time-frequency resource, wherein one second time-frequency resource and one second space resource are associated with one second factor.

In a possible implementation, the communication unit 3101 is further configured to send indication information to the terminal device, where the indication information is used to indicate the at least one first factor.

Optionally, the first spatial resource includes a spatial layer, the at least one first factor indicated by the indication information is a factor in a quantization codebook, the quantization codebook includes P factor vectors, each factor vector is a vector of the quantization codebook, each factor vector includes N factors, the factors of each factor vector are associated with the reference signal ports one by one, and P and N are integers greater than zero; the indication information carries an index of the factor vector to indicate the at least one first factor.

In one possible implementation, the processing unit 3102 is further configured to precode at least one reference signal; a communication unit 3101, further configured to send the at least one reference signal after precoding to the terminal device, where one first time-frequency resource and one first space resource are associated with one reference signal.

Fig. 32a shows a communication apparatus 320 provided in this embodiment of the present application, which is used to implement the functions of the terminal device in fig. 5, or fig. 11, or fig. 13, or fig. 24, or fig. 25, or fig. 27, or fig. 29. The apparatus may be a terminal device or an apparatus for a terminal device. The means for the terminal device may be a system of chips or a chip within the terminal device. The chip system may be composed of a chip, or may include a chip and other discrete devices. Or, the communication device 320 is configured to implement the functions of the network device in fig. 5, 11, 13, 24, 25, 27, and 29. The apparatus may be a network device or an apparatus for a network device. The means for the network device may be a system-on-chip or a chip within the network device. The chip system may be composed of a chip, or may include a chip and other discrete devices.

The communication device 320 includes at least one processor 3220, configured to implement the data processing function of the terminal device or the network device in the method provided in the embodiment of the present application. The apparatus 320 may further include a communication interface 3210, configured to implement transceiving operations of a terminal device or a network device in the method provided in this embodiment of the present application. In embodiments of the present application, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface for communicating with other devices over a transmission medium. For example, the communication interface 3210 is used for devices in the device 320 to communicate with other devices. The processor 3220 utilizes the communication interface 3210 to transceive data, and is configured to implement the method described in fig. 5, 11, 13, 24, 25, 27, or 29 in the above method embodiments.

The apparatus 320 may also include at least one memory 3230 for storing program instructions and/or data. The memory 3230 is coupled to the processor 3220. 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 3220 may cooperate with the memory 3230. Processor 3220 may execute program instructions stored in memory 3230. At least one of the at least one memory may be included in the processor.

In the embodiment of the present application, a specific connection medium between the communication interface 3210, the processor 3220, and the memory 3230 is not limited. In fig. 32a, the memory 3230, the processor 3220 and the communication interface 3210 are connected by a bus 3240, the bus is shown by a thick line in fig. 32a, and the connection manner between other components is only schematically illustrated and is not limited. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 32a, but this does not mean only one bus or one type of bus.

When the apparatus 320 is specifically an apparatus for a terminal device or a network device, for example, when the apparatus 320 is specifically a chip or a chip system, the output or the reception of the communication interface 3210 may be a baseband signal. When the device 320 is specifically a terminal device or a network device, the output or the reception of the communication interface 3210 may be a radio frequency signal. In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, operations, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The operations of the methods disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

As an example, fig. 32b is a schematic structural diagram of another terminal device 3200 according to an embodiment of the present application. The terminal device can execute the operations executed by the terminal device in the method embodiment.

For convenience of explanation, fig. 32b shows only the main components of the terminal device. As shown in fig. 32b, the terminal device 3200 includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output means. The processor is mainly used for processing the communication protocol and the communication data, controlling the whole terminal device, executing the software program, and processing the data of the software program, for example, for supporting the terminal device to execute the flow described in fig. 5 or 11 or 13 or 24 or 25 or 27 or 29. The memory is used primarily for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. The terminal device 3200 may further comprise input and output means such as a touch screen, a display screen, a keyboard or the like, which are mainly used for receiving data input by a user and outputting data to the user. It should be noted that some kinds of terminal devices may not have input/output devices.

When the terminal device is started, the processor can read the software program in the storage unit, interpret and execute the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor outputs a baseband signal to the radio frequency circuit after performing baseband processing on the data to be sent, and the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data.

Those skilled in the art will appreciate that fig. 32b shows only one memory and processor for ease of illustration. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, and the like, which is not limited in this application.

As an optional implementation manner, the processor may include a baseband processor and a Central Processing Unit (CPU), where the baseband processor is mainly used to process a communication protocol and communication data, and the CPU is mainly used to control the whole terminal device, execute a software program, and process data of the software program. Alternatively, the processor may be a Network Processor (NP) or a combination of a CPU and an NP. The processor may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof. The memory may include volatile memory (volatile memory), such as random-access memory (RAM); the memory may also include a non-volatile memory (non-volatile memory), such as a flash memory (flash memory), a Hard Disk Drive (HDD) or a solid-state drive (SSD); the memory may also comprise a combination of memories of the kind described above.

For example, in the embodiment of the present application, as shown in fig. 32b, the antenna and the rf circuit with transceiving function may be regarded as the communication unit 3201 of the terminal device 3200, and the processor with processing function may be regarded as the processing unit 3202 of the terminal device 3200.

The communication unit 3201 may also be referred to as a transceiver, a transceiving apparatus, a transceiving unit, etc. for implementing transceiving functions. Alternatively, a device for implementing a receiving function in the communication unit 3201 may be regarded as a receiving unit, and a device for implementing a transmitting function in the communication unit 3201 may be regarded as a transmitting unit, that is, the communication unit 3201 includes a receiving unit and a transmitting unit. For example, the receiving unit may also be referred to as a receiver, a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitting circuit, etc.

In some embodiments, the communication unit 3201 and the processing unit 3202 may be integrated into one device, or may be separated into different devices, and further, the processor and the memory may be integrated into one device, or may be separated into different devices.

The communication unit 3201 may be configured to perform transceiving operations of the terminal device in the above method embodiments. The processing unit 3202 may be used to perform data processing operations of the terminal device in the above-described method embodiments.

Embodiments of the present application further provide a computer-readable storage medium, in which instructions are stored, and when the computer-readable storage medium is executed on a processor, the method flow of the foregoing method embodiments is implemented.

Embodiments of the present application further provide a computer program product, where when the computer program product runs on a processor, the method flow of the foregoing method embodiments is implemented.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method of data detection, the method comprising:

The terminal equipment detects data on a first time-frequency resource and a first space resource, wherein the data on one first time-frequency resource and one first space resource are associated with a first factor, the data on different first time-frequency resources and first space resources are associated with a first factor which is determined independently, the first factor is a scalar and is used for precoding the data associated with the first factor, one first time-frequency resource comprises one or more frequency-domain resource groups, and one first space resource comprises one or more space layers.

2. The method of claim 1, further comprising:

the terminal device receiving at least one precoded reference signal, a second time-frequency resource and a second spatial resource being associated with one of the reference signals, data on one of the second time-frequency resource and the second spatial resource being associated with a second factor, the second factor being a scalar for precoding the data associated with the second factor, one of the second time-frequency resource comprising one or more frequency-domain resource groups, one of the second spatial resource comprising one or more spatial layers;

The terminal device detects data on a second time-frequency resource and a second space resource associated with the reference signal based on the reference signal.

3. The method of claim 2, further comprising:

the terminal equipment receives indication information sent by the network equipment, wherein the indication information is used for indicating at least one piece of first information, one piece of the first information is related to one first factor, and one piece of the first information is associated with one second time-frequency resource and one second space resource;

the terminal device detecting data on a first time-frequency resource and a first space resource, including:

the terminal device detects data pre-coded by a first factor related to the first information based on the first information and a target reference signal in the at least one reference signal, wherein a second time-frequency resource and a second space resource associated with the target reference signal are a second time-frequency resource and a second space resource associated with the first information.

4. The method according to claim 2 or 3, wherein a second factor associated with data on the second time-frequency resource and the second spatial resource is also used for precoding reference signals associated with the second time-frequency resource and the second spatial resource.

5. The method of claim 3, wherein one of said first factors is associated with one or more of said second factors, and wherein one of said first messages is associated with one of said first factors and one of said second factors associated with said first factor.

6. The method of claim 5, wherein the first information is a difference between the first factor and a second factor associated with the first factor, or wherein the first information is a quotient between the first factor and a second factor associated with the first factor.

7. The method according to any one of claims 2 to 6, wherein the first factor relates to one or more of the following information: data on the first time-frequency resource, a first channel matrix corresponding to the first time-frequency resource, or a first precoding matrix corresponding to the first time-frequency resource;

the second factor relates to one or more of the following: data on the second time frequency resource, a reference signal associated with the second time frequency resource, a second channel matrix corresponding to the second time frequency resource, or a second precoding matrix corresponding to the second time frequency resource.

8. The method according to any of claims 2-7, characterized by having one or more sets of time-frequency resources, a set of time-frequency resources comprising one or more of the first time-frequency resources and one or more of the second time-frequency resources.

9. The method according to any of claims 2-8, wherein the first time-frequency resource comprises time-domain resources different from the time-domain resources of the second time-frequency resource.

10. The method according to any of claims 2-8, wherein the first time-frequency resource comprises frequency-domain resources that are different from frequency-domain resources comprised by the second time-frequency resource.

11. The method according to claim 3 or 5, wherein the at least one first information is an information in a first set of information.

12. The method according to any one of claims 1 to 11, wherein the number of the first time-frequency resources is pre-specified by a protocol; or,

before the terminal device receives the indication information sent by the network device, the method further includes:

and the terminal equipment receives configuration information sent by the network equipment, wherein the configuration information is used for configuring the number of the first time-frequency resources.

13. The method of claim 12, further comprising:

and the terminal equipment determines the time-frequency resources included in each first time-frequency resource based on the time-frequency resources of the downlink data scheduled by the network equipment and the number of the first time-frequency resources.

14. The method according to any one of claims 1 to 13, wherein the number of the first space resources is pre-specified by a protocol; or,

and the terminal equipment receives configuration information sent by the network equipment, wherein the configuration information is used for configuring the number of the first space resources.

15. The method of claim 14, further comprising:

the terminal device determines a spatial layer included by each first spatial resource based on the number of spatial layers of the terminal device and the number of the first spatial resources.

16. The method according to any one of claims 1 to 15, wherein the pre-coding of data by the first factor comprises:

wherein s ═ s(s) ₁，s₂，...，s_L)^TWhich is indicative of the data that is being transmitted,

is a diagonal matrix, beta is a power adjustment factor,

or

Or

And W is a linear precoding matrix.

17. The method of claim 4, wherein precoding data or reference signals by the second factor comprises:

wherein s ═ s(s)₁，s₂，...，s_L)^TIndicating the data or reference signal that is transmitted,

is a diagonal matrix, beta is a power adjustment factor,

or

Or

And W is a linear precoding matrix.

18. The method according to any one of claims 1 to 15, wherein the pre-coding of data by the first factor comprises:

wherein s is(s)₁，s₂，...，s_L)^TWhich is indicative of the data being transmitted,

is a diagonal matrix, beta is a power adjustment factor,

or

Or

Representing a first factor corresponding to the kth spatial layer, the Q and B matrices being related to the channel matrix H, d ═ d (d)₁，d₂，...，d_L)^Tτ is the modulus operation parameter for the perturbation vector due to the modulus operation.

19. The method according to any one of claims 2 to 11, wherein the pre-coding of data by the second factor comprises:

is a diagonal matrix, beta is a power adjustment factor,

or

Or

Representing a second factor corresponding to the k-th spatial layer, the Q and B matrices being related to the channel matrix H，d＝(d₁，d₂，...，d_L)^Tτ is the modulus operation parameter for the perturbation vector due to the modulus operation.

20. The method of claim 4, wherein precoding the reference signal by the second factor comprises:

or the following steps:

wherein s ═ s(s)₁，s₂，...，s_L)^TWhich is indicative of the reference signal being transmitted,

is a diagonal matrix, alpha is a power adjustment factor,

or

Or

21. A method of data detection, the method comprising:

the network equipment precodes data on a first time-frequency resource and a first space resource based on a first factor, and sends the precoded data on the first time-frequency resource; data on one of said first time-frequency resources and one of said first spatial resources is associated with one of said first factors, and data on different first time-frequency resources and first spatial resources are associated with independently determined first factors, said first factors being scalars for precoding data associated with said first factors, one of said first time-frequency resources comprising one or more groups of frequency-domain resources, and one of said first spatial resources comprising one or more spatial layers.

22. The method of claim 21, further comprising:

the network device pre-codes at least one reference signal and sends the at least one reference signal after pre-coding to the terminal device, wherein a second time-frequency resource and a second space resource are associated with one reference signal, data on one second time-frequency resource and one second space resource are associated with a second factor, the second factor is a scalar and is used for pre-coding the data associated with the second factor, one second time-frequency resource comprises one or more frequency-domain resource groups, and one second space resource comprises one or more space layers;

and the network equipment precodes the data on the second time-frequency resource and the second space resource based on the second factor, and sends the precoded data on the second time-frequency resource.

23. The method of claim 22, further comprising:

the network device sends indication information to the terminal device, wherein the indication information is used for indicating at least one first information, one first information is related to one first factor, and one first information is associated with one second time-frequency resource and one second space resource.

24. The method according to claim 22 or 23, wherein a second factor associated with data on the second time-frequency resource and the second spatial resource is also used for precoding reference signals associated with the second time-frequency resource and the second spatial resource.

25. The method of claim 23, wherein one of said first factors is associated with one or more of said second factors, and wherein one of said first messages is associated with one of said first factors and one of said second factors associated with said first factor.

26. The method of claim 25, wherein the first information is a difference between the first factor and a second factor associated with the first factor, or wherein the first information is a quotient between the first factor and a second factor associated with the first factor.

27. The method according to any one of claims 22 to 26,

the first factor relates to one or more of the following information: data on the first time-frequency resource, a first channel matrix corresponding to the first time-frequency resource or a first precoding matrix corresponding to the first time-frequency resource;

28. The method according to any of claims 22-27, wherein there are one or more sets of time-frequency resources, and wherein a set of time-frequency resources comprises one or more of the first time-frequency resources and one or more of the second time-frequency resources.

29. The method according to any of claims 22-28, wherein the first time-frequency resource comprises time-domain resources that are different from time-domain resources comprised by the second time-frequency resource.

30. The method according to any of claims 22-28, wherein the first time-frequency resource comprises frequency-domain resources that are different from frequency-domain resources comprised by the second time-frequency resource.

31. The method according to claim 23 or 25, wherein the at least one first information is an information in a first set of information.

32. The method according to any one of claims 21 to 31, wherein the number of the first time/frequency resources is pre-specified by a protocol; or,

Before the network device sends the indication information, the method further includes:

and the network equipment sends configuration information to the terminal equipment, wherein the configuration information is used for configuring the number of the first time-frequency resources.

33. The method of claim 32, further comprising:

the network equipment determines the time frequency resource included in each first time frequency resource based on the time frequency resource of the downlink data scheduled by the network equipment and the number of the first time frequency resources.

34. The method according to any one of claims 21 to 33, wherein the amount of the first space resource is pre-specified by a protocol; or,

and the network equipment sends configuration information to the terminal equipment, wherein the configuration information is used for configuring the number of the first space resources.

35. The method of claim 34, further comprising:

the network device determines a spatial layer included in the first spatial resource based on the number of spatial layers of the terminal device and the number of the first spatial resource.

36. The method according to any of claims 21 to 35, wherein the pre-coding of data by the first factor comprises:

wherein s is(s)₁，s₂，...，s_L)^TWhich is representative of the data signal being transmitted,

is a diagonal matrix, beta is a power adjustment factor,

or

And W is a linear precoding matrix.

37. The method of claim 24, wherein precoding data or reference signals by the second factor comprises:

wherein s ═ s(s)₁，s₂，...，s_L)^TRepresents the transmitted data signal or reference signal,

is a diagonal matrix, beta is a power adjustment factor,

or

And W is a linear precoding matrix.

38. The method according to any of claims 21 to 35, wherein the pre-coding of data by the first factor comprises:

wherein s ═ s(s)₁，s₂，...，s_L)^TWhich is representative of the data signal being transmitted,

is a diagonal matrix, beta is a power adjustment factor,

or

39. The method according to any of claims 22 to 31, wherein the precoding of the data by the second factor is performed by:

is a diagonal matrix, beta is a power adjustment factor,

or

Representing a second factor corresponding to the kth spatial layer, the Q and B matrices being related to the channel matrix H, d ═ d (d)₁，d₂，...，d_L)^Tτ is the modulus operation parameter for the perturbation vector due to the modulus operation.

40. The method of claim 24, wherein precoding the reference signal by the second factor comprises:

or the following steps:

is a diagonal matrix, alpha is a power adjustment factor,

or

41. A communications device comprising means for implementing the method of any of claims 1-20 or comprising means for implementing the method of any of claims 21-40.

42. A communication apparatus comprising a processor, the method of any one of claims 1-20 being performed, or the method of any one of claims 21-40 being performed, when the processor executes a computer program in a memory.

43. A communication device comprising a processor and a memory;

the memory is used for storing computer execution instructions;

the processor is configured to execute computer-executable instructions stored by the memory to cause the communication device to perform the method of any of claims 1-20 or to cause the communication device to perform the method of any of claims 21-40.

44. A communication device comprising a processor, a memory, and a transceiver;

the transceiver is used for receiving channels or signals or sending channels or signals;

the memory for storing a computer program;

the processor for invoking the computer program from the memory to perform the method of any of claims 1-20 or for invoking the computer program from the memory to perform the method of any of claims 21-40.

45. A communication device comprising a processor and a communication interface;

the communication interface is used for communicating with other communication devices; the processor is configured to run a program to cause the communication device to implement the method of any one of claims 1 to 20, or to cause the communication device to implement the method of any one of claims 21 to 40.

46. A computer readable storage medium having computer readable instructions stored thereon which, when run on a communication device, cause the communication device to perform the method of any of claims 1-20 or cause the communication device to perform the method of any of claims 21-40.