WO2017097269A1 - Interference estimation method and device - Google Patents

Abstract

Disclosed are an interference estimation method and device, used for solving the problem that existing interference covariance matrix estimation methods are low in accuracy. The method comprises: a terminal, according to DMRS configuration information corresponding to each interference data stream and a DMRS receiving signal on a DMRS port corresponding to each interference data stream, respectively performs estimation on a channel of each interference data stream, and obtains a channel vector corresponding to each interference data stream; the terminal, according to the channel vectors corresponding to the interference data streams, determines N interference data streams having the largest average power within a first resource, according to the channel vectors respectively corresponding to the N interference data streams, determines first interference covariance matrices respectively corresponding to the N interference data streams within a second resource, and determines the sum of the first interference covariance matrices to be a second interference covariance matrix; the terminal, according to the second interference covariance matrix, determines a first interference and noise covariance matrix.

Description

Interference estimation method and device

The present application claims priority to Chinese Patent Application No. 20151090825, filed on Dec. 09, 2015, the entire disclosure of which is hereby incorporated by reference. .

Technical field

The present invention relates to the field of communications, and in particular, to an interference estimation method and apparatus.

Background technique

In the LTE (Long Term Evolution) system and its subsequent evolution system, the user equipment can perform channel estimation through a dedicated DMRS (Demodulation Reference Signal), where the DMRS performs the same precoding operation as the data signal. . LTE Rel-10 and above can support 8 orthogonal DMRS ports - ports 7 to 14. Ports 7, 8, 11, and 13 multiplex the same RE (Resource Element), and ports 9, 10, 12, and 14 multiplex the same RE. Figure 1 shows the DMRS configuration pattern in the standard CP downlink subframe. ).

In order to save the overhead of time-frequency resources occupied by DMRS, the multiple-user multiple input multiple output (MU-MIMO) transmission mode in the LTE system uses only ports 7 and 8, that is, corresponding to multiple data streams. The DMRS multiplexes the same DMRS port, shares the same set of REs, and uses code division orthogonal or quasi-orthogonal methods to distinguish different data streams, wherein the code division orthogonal mode uses ports 7 and 8 of the same DMRS sequence. The data stream between the two uses different OCC (Orthogonal Cover Code) to achieve the purpose of orthogonality, while the data stream in the same port in the quasi-orthogonal mode uses different DMRS scrambling sequences and undergoes different pre- Encoding/beamforming processing.

When the number of user equipments scheduled by the base station is relatively large, the number of useful data streams subject to interference data streams from the same base station is also very large. In particular, the number of users simultaneously supported in MU-MIMO of a large-scale antenna system is greatly increased, and the problem of inter-stream interference is more prominent. When the user equipment has multiple receiving antennas, an IRC (Interference Rejection Combining) receiver can be used to suppress inter-stream interference and neighboring interference. This requires estimating the interference covariance matrix. Since the accuracy of the IRC receiver interference estimation directly affects the receiver detection performance, the IRC receiver performance with inaccurate interference estimation is even lower than the MMSE (Minimum Mean-Squared Error) receiver. In the existing standards, the interference covariance matrix is usually estimated based on the received DMRS or data signal. Since different user equipment DMRSs may be superimposed in a quasi-orthogonal manner, the estimation of the existing interference covariance matrix is performed. The method has a problem of low accuracy, resulting in poor detection performance of the receiver.

Summary of the invention

The embodiment of the present application provides an interference estimation method and device, which is used to solve the problem that the estimation method of the existing interference covariance matrix has low accuracy, thereby causing poor detection performance of the receiver.

In a first aspect, an interference estimation method is provided, including:

The terminal estimates the channel of each interference data stream according to the DMRS configuration information of the demodulation reference signal corresponding to each interference data stream and the DMRS reception signal of the DMRS port corresponding to each interference data stream, and obtains each channel interference data. The channel vector corresponding to the stream;

Determining, by the channel vector corresponding to each interference data stream, the N channel interference data stream with the largest average power in the first resource, and determining the second resource according to the channel vector corresponding to the N channel interference data stream respectively The first interference covariance matrix corresponding to the N channels of interference data streams respectively, and the sum of the first interference covariance matrices corresponding to the N channels of interference data streams respectively is determined as a second interference covariance matrix, where N is Positive integer

The terminal determines a first interference and noise covariance matrix according to the second interference covariance matrix.

Optionally, the terminal estimates the channel of each interference data stream according to the DMRS configuration information of the demodulation reference signal corresponding to each interference data stream and the DMRS receiving signal on the DMRS port corresponding to each interference data stream. Obtaining a channel vector corresponding to each interference data stream, including:

Determining, by the first DMRS receiving signal on the DMRS port of the DMRS of the terminal, the first remaining signal after removing the DMRS of the terminal in the first DMRS received signal, and according to the first a residual signal, estimating a channel of each interference data stream corresponding to the first residual signal, and obtaining a channel vector corresponding to each interference data stream;

And for the second DMRS receiving signal on the DMRS port of the DMRS that does not carry the terminal, the terminal separately performs, according to the second DMRS receiving signal, a channel of each interference data stream corresponding to the second DMRS receiving signal. It is estimated that the channel vector corresponding to each interference data stream is obtained.

Optionally, before the determining, according to the channel vector corresponding to each interference data stream, the terminal, the N-channel interference data stream with the largest average power in the first resource, the method further includes:

The terminal determines, according to the channel vector corresponding to each interference data stream, the average power of the channel vector corresponding to each interference data stream in the first resource according to the following formula:

among them,

The average power of the channel vector representing the k-th interference data stream in the first resource, k=1, . . . , K, K represents the total number of channels of the interference data stream, and K is a positive integer, and S _m represents a set of subcarriers for calculating channel vector power in the first resource, S _q represents a set of OFDM symbols used to calculate channel vector power in the first resource, and |S _m | is included in the set S _m The number of elements, |S _q | is the number of elements contained in the set S _q , ||·|| is the norm of the vector,

Representing a channel vector of the kth interference data stream on RE(m, q) of all receiving antennas of the terminal, RE(m, q) indicating that the RE is located in the mth subcarrier, the qth in the first resource OFDM symbols.

Optionally, the terminal determines, according to the channel vector corresponding to the N channels of interference data streams, a first interference covariance matrix corresponding to the N channels of interference data streams in the second resource according to the following formula:

among them,

Determining a first interference covariance matrix of the nth interference data stream in the N channel interference data stream in the second resource, n=1, . . . , N, [·] ^H is a conjugate rotation of the vector Set. S _'m represents a first set of interference covariance subcarrier covariance matrix for calculating said second resource, S' _q represents a first set of OFDM symbol interference covariance matrix for calculating said second resource, |S' _m | is the number of elements included in the set S' _m , |S' _q | is the number of elements included in the set S' _q ,

Representing a channel vector of the nth interference data stream on RE(m, q) of all receiving antennas of the terminal, RE(m,q) indicating that the RE is located in the mth subcarrier, the qth in the second resource OFDM symbols.

Based on any of the foregoing embodiments, as an optional implementation manner, before determining, by the second interference covariance matrix, the first interference and noise covariance matrix, the terminal further includes:

Determining, by the terminal, the second residual signal after the DMRS receiving signal corresponding to the DMRS of the terminal and the N-channel interference data stream respectively in the DMRS receiving signal in the second resource; according to the second remaining Signal, determining a second interference and noise covariance matrix;

Determining, by the terminal, the first interference and noise covariance matrix according to the second interference covariance matrix, including:

The terminal determines a sum of the second interference covariance matrix and the second interference and noise covariance matrix as the first interference and noise covariance matrix.

As another optional implementation manner, before determining, by the second interference covariance matrix, the first interference and noise covariance matrix, the terminal further includes:

The terminal estimates a total power of the neighboring interference signal and the noise signal in the second resource, and determines a covariance matrix corresponding to the neighboring area interference signal and the noise signal according to the total power; and the neighboring area interference and The covariance matrix corresponding to the noise is determined as the second interference and noise covariance matrix;

Determining, by the terminal, the first interference and noise covariance matrix according to the second interference covariance matrix, including:

The terminal determines a sum of the second interference covariance matrix and the second interference and noise covariance matrix as the first interference and noise covariance matrix.

In a second aspect, a terminal is provided, including:

a first processing module, configured to estimate, according to the DMRS configuration information of the demodulation reference signal corresponding to each interference data stream and the DMRS receiving signal on the DMRS port corresponding to each interference data stream, respectively, to estimate the channel of each interference data stream Obtaining a channel vector corresponding to each interference data stream;

a second processing module, configured to determine, according to a channel vector corresponding to each interference data stream, an N-channel interference data stream with a maximum average power in the first resource, and determine, according to the channel vector corresponding to the N-channel interference data stream, respectively Determining, by the first interference covariance matrix corresponding to the N channels of interference data streams in the second resource, determining a sum of the first interference covariance matrices corresponding to the N channels of interference data streams as a second interference covariance matrix, Where N is a positive integer;

And a third processing module, configured to determine, according to the second interference covariance matrix, a first interference and a noise covariance matrix.

Optionally, the first processing module is specifically configured to:

Determining, by the first DMRS receiving signal on the DMRS port of the DMRS of the terminal, a first remaining signal after removing the DMRS of the terminal in the first DMRS received signal, and according to the first remaining signal, Estimating a channel of each interference data stream corresponding to the first residual signal to obtain a channel vector corresponding to each interference data stream;

For the second DMRS receiving signal on the DMRS port of the DMRS that does not carry the terminal, estimating, according to the second DMRS receiving signal, the channel of each interference data stream corresponding to the second DMRS receiving signal, The channel vector corresponding to each interference data stream.

Optionally, the first processing module determines, according to the channel vector corresponding to each interference data stream, the N-channel interference data stream with the largest average power in the first resource, and is further configured to:

According to the channel vector corresponding to each interference data stream, the average power of the channel vector corresponding to each interference data stream in the first time frequency is determined according to the following formula:

among them,

The average power of the channel vector representing the k-th interference data stream in the first resource, k=1, . . . , K, K represents the total number of channels of the interference data stream, and K is a positive integer, and S _m represents a set of subcarriers for calculating channel vector power in the first resource, S _q represents a set of OFDM symbols used to calculate channel vector power in the first resource, and |S _m | is included in the set S _m The number of elements, |S _q | is the number of elements contained in the set S _q , ||·|| is the norm of the vector,

Representing a channel vector of the kth interference data stream on RE(m, q) of all receiving antennas of the terminal, RE(m, q) indicating that the RE is located in the mth subcarrier, the qth in the first resource OFDM symbols.

Optionally, the second processing module determines, according to the channel vector corresponding to the N channels of interference data streams, a first interference covariance matrix corresponding to the N channels of interference data streams in the second resource according to the following formula: :

among them,

Determining a first interference covariance matrix of the nth interference data stream in the N channel interference data stream in the second resource, n=1, . . . , N, [·] ^H is a conjugate rotation of the vector Let _S'm denote a set of subcarriers for calculating a first interference covariance matrix in the second resource, and _S'q denotes an OFDM symbol for calculating a first interference covariance matrix in the second resource. The set, |S' _m | is the number of elements included in the set S' _m , and |S' _q | is the number of elements included in the set S' _q ,

Representing a channel vector of the nth interference data stream on RE(m, q) of all receiving antennas of the terminal, RE(m,q) indicating that the RE is located in the mth subcarrier, the qth in the second resource OFDM symbols.

Based on any of the foregoing embodiments, as a possible implementation manner, the third processing module is specifically configured to:

Determining, in all DMRS received signals, a second residual signal after the DMRS received signal corresponding to the DMRS of the terminal and the N-channel interference data stream respectively; determining the second interference and noise according to the second residual signal Covariance matrix;

And determining, by the sum of the second interference covariance matrix and the second interference and noise covariance matrix, the first interference and noise covariance matrix.

As another possible implementation manner, the third processing module is specifically configured to:

Estimating the total power of the neighboring area interference signal and the noise signal, and determining a covariance matrix corresponding to the neighboring area interference signal and the noise signal according to the total power; determining the covariance matrix corresponding to the neighboring area interference and the noise as the second Interference and noise covariance matrix;

And determining, by the sum of the second interference covariance matrix and the second interference and noise covariance matrix, the first interference and noise covariance matrix.

In a third aspect, there is provided another terminal comprising a receiver and at least one processor coupled to the receiver, wherein:

The processor is configured to read a program in the memory and perform the following process:

According to the DMRS configuration information corresponding to each interference data stream and the DMRS receiving signal on the DMRS port corresponding to each interference data stream, the channels of each interference data stream are respectively estimated, and the channel vector corresponding to each interference data stream is obtained. And determining, according to the channel vector corresponding to each of the interference data streams, an N-channel interference data stream with the largest average power in the first resource, and determining, according to the channel vector corresponding to the N-channel interference data stream, the second resource Determining, by the N-channel interference data stream, a first interference covariance matrix, respectively, determining a sum of the first interference covariance matrices corresponding to the N-channel interference data streams as a second interference covariance matrix, where N is a positive integer Determining a first interference and noise covariance matrix according to the second interference covariance matrix;

The receiver is configured to receive DMRS and/or data streams under control of the processor.

Optionally, the processor reads the program in the memory, and specifically executes:

Determining, by the first DMRS receiving signal on the DMRS port of the DMRS of the terminal, a first remaining signal after removing the DMRS of the terminal in the first DMRS received signal, and according to the first remaining signal, Estimating a channel of each interference data stream corresponding to the first residual signal to obtain a channel vector corresponding to each interference data stream;

For the second DMRS receiving signal on the DMRS port of the DMRS that does not carry the terminal, estimating, according to the second DMRS receiving signal, the channel of each interference data stream corresponding to the second DMRS receiving signal, The channel vector corresponding to each interference data stream.

Optionally, before determining, according to the channel vector corresponding to each interference data stream, the processor, before determining the N-channel interference data stream with the largest average power in the first resource, performing:

According to the channel vector corresponding to each interference data stream, the average power of the channel vector corresponding to each interference data stream in the first time frequency is determined according to the following formula:

among them,

The average power of the channel vector representing the k-th interference data stream in the first resource, k=1, . . . , K, K represents the total number of channels of the interference data stream, and K is a positive integer, and S _m represents a set of subcarriers for calculating channel vector power in the first resource, S _q represents a set of OFDM symbols used to calculate channel vector power in the first resource, and |S _m | is included in the set S _m The number of elements, |S _q | is the number of elements contained in the set S _q , ||·|| is the norm of the vector,

Representing a channel vector of the kth interference data stream on RE(m, q) of all receiving antennas of the terminal, RE(m, q) indicating that the RE is located in the mth subcarrier, the qth in the first resource OFDM symbols.

Optionally, the processor determines, according to a channel vector corresponding to the N channels of interference data streams, a first interference covariance matrix corresponding to the N channels of interference data streams in the second resource according to the following formula:

among them,

Determining a first interference covariance matrix of the nth interference data stream in the N channel interference data stream in the second resource, n=1, . . . , N, [·] ^H is a conjugate rotation of the vector Let _S'm denote a set of subcarriers for calculating a first interference covariance matrix in the second resource, and _S'q denotes an OFDM symbol for calculating a first interference covariance matrix in the second resource. The set, |S' _m | is the number of elements included in the set S' _m , and |S' _q | is the number of elements included in the set S' _q ,

Representing a channel vector of the nth interference data stream on RE(m, q) of all receiving antennas of the terminal, RE(m,q) indicating that the RE is located in the mth subcarrier, the qth in the second resource OFDM symbols.

Based on any of the foregoing embodiments, as an optional implementation manner, the processor reads a program in the memory, and specifically executes:

Determining, in all DMRS received signals, a second residual signal after the DMRS received signal corresponding to the DMRS of the terminal and the N-channel interference data stream respectively; determining the second interference and noise according to the second residual signal Covariance matrix;

And determining, by the sum of the second interference covariance matrix and the second interference and noise covariance matrix, the first interference and noise covariance matrix.

As another optional implementation manner, the processor reads a program in the memory, and specifically executes:

Estimating the total power of the neighboring area interference signal and the noise signal, and determining a covariance matrix corresponding to the neighboring area interference signal and the noise signal according to the total power; determining the covariance matrix corresponding to the neighboring area interference and the noise as the second Interference and noise covariance matrix;

And determining, by the sum of the second interference covariance matrix and the second interference and noise covariance matrix, the first interference and noise covariance matrix.

In the method and device provided by the embodiment of the present application, the terminal first determines, according to the channel vector corresponding to each interference signal, the N-channel interference data stream with the largest average power in the first resource, and then correspondingly according to the N-channel interference data stream. a channel vector, determining a first interference covariance matrix corresponding to the N channels of interference data streams in the second resource, determining a sum of the first interference covariance matrix as a second interference covariance matrix, and finally according to the The two interference covariance matrices determine the first interference and noise covariance matrix. Since the number of receiving antennas of the terminal is limited, the terminal eliminates interference. The channel estimation of the N-channel interference signal with the highest power is relatively accurate. Therefore, the accuracy of the interference covariance matrix is determined according to the channel of the N-channel interference signal with the highest power. Therefore, the solution of the embodiment of the present application is adopted. It can improve the accuracy of interference estimation and enhance the detection performance of IRC receivers, especially for MU-MIMO systems using large-scale antennas.

DRAWINGS

1 is a DMRS configuration pattern in a standard CP downlink subframe in the background art;

2 is a schematic flowchart of a method for estimating interference according to Embodiment 1 of the present application;

3 is a schematic diagram of a terminal according to Embodiment 2 of the present application;

FIG. 4 is a schematic diagram of a terminal according to Embodiment 3 of the present application.

detailed description

The embodiments of the present application are further described in detail below with reference to the accompanying drawings. It is to be understood that the embodiments described herein are merely illustrative and are not intended to be limiting.

A method for estimating interference is provided in Embodiment 1 of the present application. As shown in FIG. 2, the method includes:

S21. The terminal estimates, according to the DMRS configuration information corresponding to each interference data stream and the DMRS receiving signal on the DMRS port corresponding to each interference data stream, respectively, to obtain a channel corresponding to each interference data stream, and obtain corresponding to each interference data stream. Channel vector.

The DMRS configuration information is sent to the terminal by the network side (such as the base station) through high layer signaling. The DMRS configuration information includes a DMRS port used by each DMRS corresponding to each interference data stream, a DMRS scrambling code sequence, and the like.

In this step, the terminal can learn the DMRS port corresponding to each interference data stream according to the DMRS configuration information corresponding to each interference data stream.

S22. The terminal determines, according to the channel vector corresponding to each interference data stream, an N-channel interference data stream with the largest average power in the first resource, and determines a second resource according to the channel vector corresponding to the N-channel interference data stream respectively. The first interference covariance matrix corresponding to the N channels of interference data streams respectively, and the sum of the first interference covariance matrix corresponding to the N channels of interference data streams is determined as the second interference covariance matrix ;

Where N is a positive integer smaller than the total number of channels of the interference data stream of the terminal, and the specific value is pre-configured, and can be set according to experience or simulation or application environment.

S23. The terminal determines, according to the second interference covariance matrix, a first interference and noise covariance matrix.

The first interference and noise covariance matrix determined in S23 is the interference received by the useful data stream of the terminal (including the interference of the cell where the terminal is located and the interference of the neighboring cell) and the covariance matrix of the noise.

In the embodiment of the present application, the terminal first determines, according to the channel vector corresponding to each interference signal, the N-channel interference data stream with the largest average power in the first resource, and then determines the channel vector corresponding to the N-channel interference data stream respectively. Determining, by the first interference covariance matrix corresponding to the N channels of interference data streams in the second resource, determining a sum of the first interference covariance matrices corresponding to the N channels of interference data streams as a second interference covariance matrix, Finally, the first interference and noise covariance matrix is determined according to the second interference covariance matrix. Since the number of receiving antennas of the terminal is limited, the capability of the terminal to cancel interference is limited, and the channel estimation of the N-channel interference signal with the largest power is accurate. Therefore, the accuracy of the interference covariance matrix is determined according to the channel of the N-channel interference signal with the largest power. The degree is higher. Therefore, the solution of the embodiment of the present application can improve the accuracy of the interference estimation and enhance the detection performance of the IRC receiver, and is particularly suitable for the MU-MIMO system using a large-scale antenna.

In the embodiment of the present application, for different DMRS ports, the terminal uses different methods when determining the channel vector corresponding to each interference data stream, as follows:

1. For the first DMRS receiving signal on the DMRS port of the DMRS carrying the terminal, the terminal determines the first residual signal after removing the DMRS of the terminal in the first DMRS received signal, and according to the first residual signal, A channel of each interference data stream corresponding to the residual signal is estimated to obtain a channel vector corresponding to each interference data stream.

The first DMRS receiving signal is received by the terminal on a DMRS port that carries the DMRS of the terminal itself.

Since the beamforming of the DMRS corresponding to the data stream of the terminal itself is directed to the terminal, the receiving power of the DMRS of the terminal is very strong, and the equivalent channel estimation of the data stream of the terminal itself is relatively accurate. The DMRS corresponding to the data flow of the terminal itself (ie, the DMRS of the terminal) has a large interference to the DMRS corresponding to the interference data stream that is sent by the DMRS of the terminal in a quasi-orthogonal manner, and is directly estimated according to the received signal of the first DMRS. The channel accuracy of the interfering data stream is poor. Therefore, the DMRS of the terminal is first subtracted from the received signal of the first DMRS, and then the channel of each interference data stream corresponding to the first residual signal is estimated according to the obtained first residual signal, so that the quasi-orthogonal interference can be improved. The DMRS corresponding to the data stream performs the accuracy of the interference data stream channel estimation.

For example, the terminal first performs channel estimation on the terminal's own data stream according to the first DMRS received signal by using an existing channel estimation method (such as MMSE channel estimation). The process can be described as:

among them,

N _R denotes the received signal of first DMRS receiving antenna RE (m, q) of the terminal,

Means the terminal obtained by the first DMRS received signal estimation n _R receive antenna of the terminal on a RE (m, q) of the terminal itself of l-way data channel coefficient stream, the terminal itself of l passage The RE(m, q) in which the DMRS corresponding to the data stream is located indicates that the RE is located in the mth subcarrier and the qth OFDM symbol, and l=1, . . . , L, L represents the total number of channels of the terminal itself. And L is a positive integer, and the superscript s represents the data flow of the terminal itself.

Then, the terminal subtracts the DMRS receiving signal corresponding to the data stream estimated by the terminal from the first DMRS receiving signal to obtain a first residual signal, where the first residual signal is the interference data stream in the first DMRS receiving signal. The DMRS receives the signal. The process can be described as:

among them,

The first residual signal RE (m, q) of the n _R receive antennas represent the terminal,

Indicates the DMRS symbol transmitted by the DMRS corresponding to the lth data stream of the terminal itself on RE(m, q), and S _{L(m, q)} indicates that the same RE (m, q) is shared and quasi-orthogonal or coded (OCC) a set of multiple data streams corresponding to orthogonal DMRS ports (for example, ports 7 and 8 share the same set of REs, then the set is a set of all data streams corresponding to ports 7, 8), and superscript s indicates the terminal Its own data stream.

among them,

a channel vector representing the data flow of the terminal itself,

Indicates the DMRS symbol corresponding to the data stream of the terminal itself.

In general, DMRS symbols are typically generated by DMRS scrambling sequences and OCC.

Typically, a terminal's multipath interference data stream is assigned orthogonal (eg, code division or frequency division) DMRS ports.

Finally, the terminal performs channel estimation on each interference data stream corresponding to the first residual signal according to the existing channel estimation method (such as MMSE channel estimation) according to the first residual signal obtained as described above; the process may be described as:

among them,

Representing a channel coefficient of the kth interference data stream estimated by the terminal according to the residual signal in the DMRS received signal on the RE(m, q) of the nth _R receiving antenna,

Representing a set of interfering data streams in the first DMRS received signal, and an estimated channel vector of the kth interfering data stream on RE(m, q)

N _{R is} the number of receiving antennas of the terminal, (·) ^T is a transpose of the vector, and superscript i represents the interference data stream of the terminal.

among them,

a channel vector representing the interference data stream of the terminal,

2. For the second DMRS receiving signal on the DMRS port of the DMRS that does not carry the terminal, the terminal estimates the channel of each interference data stream corresponding to the second DMRS receiving signal according to the second DMRS receiving signal, and obtains The channel vector corresponding to each interference data stream.

The second DMRS receiving signal is received by the terminal on the DMRS port of the DMRS that does not carry the terminal itself.

For the second DMRS received signal, since the DMRS of the terminal is not included in the second DMRS received signal, the terminal may perform channel estimation on the corresponding interference data stream in the second DMRS received signal according to the existing channel estimation method. The process can be described as:

among them,

Represents n _R receive antenna terminal RE of the reception signal on the second DMRS (m, q),

Representing the channel coefficient of the k-th interfering data stream estimated by the terminal according to the second DMRS received signal on the RE(m, q) of the n-th _R -receiving antenna, and the RE of the DMRS corresponding to the k-th interfering data stream ( m, q) indicates that the RE is located in the mth subcarrier, the qth OFDM symbol,

Representing a set of interfering data streams in the second DMRS received signal, the superscript i representing the interfering data stream of the terminal.

For example, assume that the total number of data streams (including the useful data stream (ie, the terminal's own data stream) and the interference data stream) is 24, and the DMRS corresponding to each data stream is determined by the DMRS port and the DMRS scrambling sequence. The terminal can learn the DMRS configuration information at this time according to the signaling sent by the network side. Assume that the DMRS configuration is as shown in Table 1.

Table 1

If the number of data streams of the terminal itself includes 2 channels, and the DMRS numbers of the orthogonal codes are 9, 10, and are transmitted through port 7 and port 8, respectively, the terminal can know the DMRS9 (port corresponding to one data stream of the terminal). 7. The DMRS scrambling sequence 1) has quasi-orthogonal DMRS1 (port 7, DMRS scrambling sequence 0) and DMRS17 (port 7, DMRS scrambling sequence 2), and DMRS10 corresponding to another data stream in the terminal ( On port 8, DMRS scrambling sequence 1) there are quasi-orthogonal DMRS2 (port 8, DMRS scrambling sequence 0) and DMRS 18 (port 8, DMRS sequence 2). The first DMRS received signal is the received signal on ports 7, 8, 11 and 13 occupying the same RE set RE1. Then, the terminal estimates, when the channel of the interference data stream corresponding to the first residual signal after the DMRS9 corresponding to the DMRS receiving signal of the terminal and the DMRS receiving signal of the DMRS10 is subtracted from the first DMRS received signal:

When the terminal estimates the channel of the interference data stream corresponding to the DMRS of the RE1, the DMRS received signal on the RE1 is subtracted from the estimated DMRS received signal corresponding to the two data streams of the local terminal (ie, the received signals corresponding to the DMRS9 and the DMRS10) And then estimating the channel of the interference data stream corresponding to DMRS1, 2, 5, 6, 13, 14, 17, 18, 21, 22 according to the residual signal on RE1; the terminal estimates the interference data corresponding to the DMRS on RE2 When the channel is streamed, the channel of the interference data stream corresponding to DMRS3, 4, 7, 8, 11, 12, 15, 16, 19, 20, 23, 24 is directly estimated according to the DMRS received signal on RE2.

In an implementation, optionally, the determining, by the terminal in S22, the N-channel interference data stream with the largest average power in the first resource according to the channel vector corresponding to each interference data stream, the method further includes:

The terminal determines, according to the channel vector corresponding to each interference data stream, the average power of the channel vector corresponding to each interference data stream in the first resource according to the following formula:

among them,

The average power of the channel vector representing the k-th interference data stream in the first resource, k=1, . . . , K, K represents the total number of channels of the interference data stream, and K is a positive integer, and S _m represents a set of subcarriers for calculating channel vector power in the first resource, S _q represents a set of OFDM symbols used to calculate channel vector power in the first resource, and |S _m | is included in the set S _m The number of elements, |S _q | is the number of elements contained in the set S _q , ||·|| is the norm of the vector,

Representing a channel vector of the kth interference data stream on RE(m, q) of all receiving antennas of the terminal, RE(m, q) indicating that the RE is located in the mth subcarrier, the qth in the first resource The OFDM symbol, the superscript i indicates the interference data stream of the terminal.

It should be noted,

with

Representing sets separately

And collection

The number of elements contained in,

Representing a set of interference data streams in the first DMRS received signal,

Representing a set of interfering data streams in a second DMRS received signal.

In this embodiment, the first resource may be at least one RE, or may be at least one RB, and may be at least one subcarrier or the like.

In an implementation, optionally, the terminal in S22 determines, according to the channel vector corresponding to the N channels of interference data streams, a first interference covariance corresponding to the N channels of interference data streams in the second resource according to the following formula: matrix:

among them,

Determining a first interference covariance matrix of the nth interference data stream in the N channel interference data stream in the second resource, n=1, . . . , N, [·] ^H is a conjugate rotation of the vector Set. S _'m represents a first set of interference covariance subcarrier covariance matrix for calculating said second resource, S' _q represents a first set of OFDM symbol interference covariance matrix for calculating said second resource, |S' _m | is the number of elements included in the set S' _m , |S' _q | is the number of elements included in the set S' _q ,

Representing a channel vector of the nth interference data stream on RE(m, q) of all receiving antennas of the terminal, RE(m,q) indicating that the RE is located in the mth subcarrier, the qth in the second resource The OFDM symbol, the superscript i indicates the interference data stream of the terminal.

The second resource may be the same as the first resource, or may be different from the first resource, but the granularity of the second resource is less than or equal to the granularity of the first resource.

Based on any of the foregoing embodiments, the first interference covariance matrix of the interference data stream of the N maximum average power determined by the terminal in the second resource (for example, one RB) is:

Where S _N represents a set of N-channel interference data streams with the highest power.

Based on any of the foregoing embodiments, the terminal in S23 determines the first interference and noise covariance matrix according to the second interference covariance matrix, and includes the following two preferred implementation manners:

Mode 1, in order to further consider the covariance matrix of weak interference and noise except the N-channel interference data stream, improve the accuracy of the first interference and noise covariance matrix, and the terminal in S23 according to the second interference covariance matrix Before determining the first interference and noise covariance matrix, it also includes:

Determining, by the terminal, a second residual signal after the DMRS receiving signal corresponding to the DMRS of the terminal and the N-channel interference data stream respectively, according to the second remaining signal, Determining a second interference and noise covariance matrix;

Correspondingly, the terminal determining, in the S23, the first interference and the noise covariance matrix according to the second interference covariance matrix, comprising: the terminal, the second interference covariance matrix and the second interference and noise covariance matrix The sum is determined as the first interference and noise covariance matrix.

In this manner, the terminal subtracts the DMRS received by the terminal from the DMRS received by the terminal and the estimated DMRS corresponding to the N-channel interference data stream to obtain a second residual signal (also referred to as a DMRS received signal). The weak interference signal and the noise signal are used, and the covariance matrix corresponding to the channel where the second residual signal is located is calculated, and is recorded as the second interference and noise covariance matrix. The process can be described as:

among them,

Indicating the end of the n _R of second residual signal on the RE (m, q) receiving antenna (including the present cell weak interference data stream, the neighbor cell interference signals and noise signals);

a DMRS symbol transmitted on the RE(m, q) of the DMRS corresponding to the lth data stream of the terminal itself,

Indicates the DMRS symbol transmitted by the DMRS corresponding to the k-th interference data stream of the terminal on RE(m, q); S _{L(m, q)} indicates that the same RE(m, q) is shared and is quasi-orthogonal or code-divided (OCC) a set of multiple data streams of the local terminal corresponding to the orthogonal DMRS port; S _{K(m, q)} represents a DMRS port corresponding to the same RE (m, q) and orthogonally or quasi-orthogonal with code division The set of N'(N'≤N) interference data streams (ie, strong interference signals) occupying RE(m,q) in the N-channel interference data stream; the superscript s represents the data stream of the terminal itself, The superscript i indicates the interference data stream of the terminal.

It should be noted that if there is no DMRS corresponding to the data stream of the terminal itself on RE(m,q), then S _L(m,q) is empty, that is, S _L(m,q) =φ, indicating RE(m, q) belongs to the RE occupied by the second DMRS receiving signal; otherwise S _{L(m, q)} ≠ φ, indicating that RE(m, q) belongs to the RE occupied by the first DMRS receiving signal. If there is no DMRS port corresponding to the strong interference signal on RE(m,q), that is, N'=0, then S _K(m,q) = φ.

The weak interference signal and the noise signal on the plurality of receiving antennas of the terminal jointly form a weak interference signal on the RE(m, q) and a signal vector of the noise signal, that is,

The corresponding second interference and noise covariance matrix in the second resource (for example, one RB) obtained by the weak interference signal and the signal vector of the noise signal is:

Mode 2, in order to further consider a covariance matrix of weak interference and noise other than the N-channel interference data stream, and improve accuracy of the first interference and noise covariance matrix, and the terminal according to the second interference covariance matrix in S23 Before determining the first interference and noise covariance matrix, it also includes:

The terminal estimates a total power of the neighboring area interference signal and the noise signal in the second resource, and determines a covariance matrix corresponding to the neighboring area interference signal and the noise signal according to the total power; and corresponding to the neighboring area interference and the noise The covariance matrix is determined as a second interference and noise covariance matrix;

Correspondingly, the terminal determining, in the S23, the first interference and the noise covariance matrix according to the second interference covariance matrix, comprising: the terminal, the second interference covariance matrix and the second interference and noise covariance matrix The sum is determined as the first interference and noise covariance matrix.

In this manner, the terminal can estimate the neighboring area interference signal and the power P ^{i of the} noise signal in the second resource by using an existing method (for example, a CRS (Cell-specific Reference Signal)), and the neighboring area interference signal And the covariance matrix corresponding to the noise signal (ie, the second interference and noise covariance matrix) is:

among them,

It is a unit matrix of N _R ×N _R dimensions.

It should be noted that, the foregoing only provides two alternative implementation manners for determining the first interference and the noise covariance matrix according to the second interference covariance matrix, and the embodiment of the present application is not limited to adopting the foregoing manner, and may also be adopted. Other ways, such as directly determining the second interference covariance matrix as the first interference and noise covariance matrix, and the like.

The above method processing flow can be implemented by a software program, which can be stored in a storage medium, and when the stored software program is called, the above method steps are performed.

Based on the same inventive concept, a terminal is provided in the embodiment of the present application. The principle of the terminal is similar to the embodiment of the interference estimation method shown in FIG. 2, and the implementation of the terminal can be implemented by referring to the method. It will not be repeated here.

A terminal is provided in the second embodiment of the present application. As shown in FIG. 3, the terminal includes:

The first processing module 31 is configured to perform, according to the DMRS configuration information of the demodulation reference signal corresponding to each interference data stream and the DMRS receiving signal on the DMRS port corresponding to each interference data stream, respectively, for each channel of the interference data stream. Estimating, obtaining a channel vector corresponding to each interference data stream;

The second processing module 32 is configured to determine, according to the channel vector corresponding to each interference data stream, an N-channel interference data stream with the largest average power in the first resource, and according to the channel vector corresponding to the N-channel interference data stream, Determine the first a first interference covariance matrix corresponding to the N-channel interference data streams in the two resources, and a sum of the first interference covariance matrices respectively corresponding to the N-channel interference data streams is determined as a second interference covariance matrix, where N is a positive integer;

The third processing module 33 is configured to determine a first interference and noise covariance matrix according to the second interference covariance matrix.

Optionally, the first processing module 31 is specifically configured to:

Determining, by the first DMRS receiving signal on the DMRS port of the DMRS of the terminal, a first remaining signal after removing the DMRS of the terminal in the first DMRS received signal, and according to the first remaining signal, Estimating a channel of each interference data stream corresponding to the first residual signal to obtain a channel vector corresponding to each interference data stream;

For the second DMRS receiving signal on the DMRS port of the DMRS that does not carry the terminal, estimating, according to the second DMRS receiving signal, the channel of each interference data stream corresponding to the second DMRS receiving signal, The channel vector corresponding to each interference data stream.

Optionally, the first processing module 31 determines, according to the channel vector corresponding to each interference data stream, the N-channel interference data stream with the largest average power in the first resource, and is further configured to:

According to the channel vector corresponding to each interference data stream, according to Equation 5, the average power of the channel vector corresponding to each interference data stream in the first time frequency is determined.

Optionally, the second processing module 32 determines, according to the channel vector corresponding to the N channels of interference data, the first interference covariance matrix corresponding to the N channels of interference data streams in the second resource according to Equation 6.

Based on any of the foregoing embodiments, as an optional implementation manner, the third processing module 33 is specifically configured to:

Determining, in all DMRS received signals, a second residual signal after the DMRS received signal corresponding to the DMRS of the terminal and the N-channel interference data stream respectively; determining the second interference and noise according to the second residual signal Covariance matrix;

And determining, by the sum of the second interference covariance matrix and the second interference and noise covariance matrix, the first interference and noise covariance matrix.

As another optional implementation manner, the third processing module 33 is specifically configured to:

Estimating the total power of the neighboring area interference signal and the noise signal, and determining a covariance matrix corresponding to the neighboring area interference signal and the noise signal according to the total power; determining the covariance matrix corresponding to the neighboring area interference and the noise as the second Interference and noise covariance matrix;

And determining, by the sum of the second interference covariance matrix and the second interference and noise covariance matrix, the first interference and noise covariance matrix.

The structure and processing manner of the terminal provided by the embodiment of the present application are described below in conjunction with the preferred hardware structure.

In the embodiment of FIG. 4, the terminal includes a receiver 41, and at least one processor 42 coupled to the receiver 41, wherein:

The processor 42 is configured to read the program in the memory 43 and perform the following process:

According to the DMRS configuration information corresponding to each interference data stream and the DMRS receiving signal on the DMRS port corresponding to each interference data stream, the channels of each interference data stream are respectively estimated, and the channel vector corresponding to each interference data stream is obtained. And determining, according to the channel vector corresponding to each of the interference data streams, an N-channel interference data stream with the largest average power in the first resource, and determining, according to the channel vector corresponding to the N-channel interference data stream, the second resource Determining, by the N-channel interference data stream, a first interference covariance matrix, respectively, determining a sum of the first interference covariance matrices corresponding to the N-channel interference data streams as a second interference covariance matrix, where N is a positive integer Determining a first interference and noise covariance matrix according to the second interference covariance matrix;

Receiver 41 is operative to receive DMRS and/or data streams under the control of processor 42.

Wherein, in FIG. 4, the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 42 and various circuits of memory represented by memory 43. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Receiver 41 provides means for communicating with various other devices on a transmission medium. For different user equipments, the user interface 44 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 42 is responsible for managing the bus architecture and general processing, and the memory 43 can store data used by the processor 42 when performing operations.

Optionally, the processor 42 reads the program in the memory 43 and performs:

Determining, by the first DMRS receiving signal on the DMRS port of the DMRS of the terminal, a first remaining signal after removing the DMRS of the terminal in the first DMRS received signal, and according to the first remaining signal, Estimating a channel of each interference data stream corresponding to the first residual signal to obtain a channel vector corresponding to each interference data stream;

For the second DMRS receiving signal on the DMRS port of the DMRS that does not carry the terminal, estimating, according to the second DMRS receiving signal, the channel of each interference data stream corresponding to the second DMRS receiving signal, The channel vector corresponding to each interference data stream.

Optionally, before determining, according to the channel vector corresponding to each interference data stream, the processor 42 determines, before the N-channel interference data flow with the largest average power in the first resource, performing:

According to the channel vector corresponding to each interference data stream, according to formula 5, each channel interference data stream is determined respectively. The average power of the channel vector within the first time frequency.

Optionally, the processor 42 determines, according to Equation 6, the first interference covariance matrix corresponding to the N channels of interference data streams in the second resource according to the channel vector corresponding to the N channels of interference data streams.

Based on any of the above embodiments, as an optional implementation, the processor 42 reads the program in the memory 43 and performs:

Determining, in all DMRS received signals, a second residual signal after the DMRS received signal corresponding to the DMRS of the terminal and the N-channel interference data stream respectively; determining the second interference and noise according to the second residual signal Covariance matrix;

And determining, by the sum of the second interference covariance matrix and the second interference and noise covariance matrix, the first interference and noise covariance matrix.

As another alternative implementation, the processor 42 reads the program in the memory 43 and specifically executes:

Estimating the total power of the neighboring area interference signal and the noise signal, and determining a covariance matrix corresponding to the neighboring area interference signal and the noise signal according to the total power; determining the covariance matrix corresponding to the neighboring area interference and the noise as the second Interference and noise covariance matrix;

And determining, by the sum of the second interference covariance matrix and the second interference and noise covariance matrix, the first interference and noise covariance matrix.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The device is implemented in a flow or a flow or a block diagram of a block or multiple The function specified in the box.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the present application has been described, it will be apparent that those skilled in the art can make further changes and modifications to the embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.

Claims (18)

1. An interference estimation method, characterized in that the method comprises:

   The terminal estimates the channel of each interference data stream according to the DMRS configuration information of the demodulation reference signal corresponding to each interference data stream and the DMRS reception signal of the DMRS port corresponding to each interference data stream, and obtains each channel interference data. The channel vector corresponding to the stream;

   Determining, by the channel vector corresponding to each interference data stream, the N channel interference data stream with the largest average power in the first resource, and determining the second resource according to the channel vector corresponding to the N channel interference data stream respectively The first interference covariance matrix corresponding to the N channels of interference data streams respectively, and the sum of the first interference covariance matrices corresponding to the N channels of interference data streams respectively is determined as a second interference covariance matrix, where N is Positive integer

   The terminal determines a first interference and noise covariance matrix according to the second interference covariance matrix.
2. The method according to claim 1, wherein the terminal according to the demodulation reference signal DMRS configuration information corresponding to each interference data stream and the DMRS receiving signal on the DMRS port corresponding to each interference data stream respectively The channel of each interference data stream is estimated to obtain a channel vector corresponding to each interference data stream, including:

   Determining, by the first DMRS receiving signal on the DMRS port of the DMRS of the terminal, the first remaining signal after removing the DMRS of the terminal in the first DMRS received signal, and according to the first a residual signal, estimating a channel of each interference data stream corresponding to the first residual signal, and obtaining a channel vector corresponding to each interference data stream;

   And for the second DMRS receiving signal on the DMRS port of the DMRS that does not carry the terminal, the terminal separately performs, according to the second DMRS receiving signal, a channel of each interference data stream corresponding to the second DMRS receiving signal. It is estimated that the channel vector corresponding to each interference data stream is obtained.
3. The method according to claim 1, wherein the determining, by the terminal, the N-way interference data stream having the largest average power in the first resource according to the channel vector corresponding to each of the interference data streams, further comprising:

   The terminal determines, according to the channel vector corresponding to each interference data stream, the average power of the channel vector corresponding to each interference data stream in the first resource according to the following formula:

   

   among them,

   

   The average power of the channel vector representing the k-th interference data stream in the first resource, k=1, . . . , K, K represents the total number of channels of the interference data stream, and K is a positive integer, and S _m represents a set of subcarriers for calculating channel vector power in the first resource, S _q represents a set of OFDM symbols used to calculate channel vector power in the first resource, and |S _m | is included in the set S _m The number of elements, |S _q | is the number of elements contained in the set S _q , ||·|| is the norm of the vector,

   

   a channel vector indicating a k-th interference data stream on a resource unit RE(m, q) of all receiving antennas of the terminal, RE(m, q) indicating that the RE is located in the mth sub-carrier in the first resource, The qth OFDM symbol.
4. The method according to claim 1, wherein the terminal determines, according to the channel vector corresponding to the N-channel interference data streams, the corresponding N-channel interference data streams in the second resource according to the following formula: First interference covariance matrix:

   

   among them,

   

   Determining a first interference covariance matrix of the nth interference data stream in the N channel interference data stream in the second resource, n=1, . . . , N, [·] ^H is a conjugate rotation of the vector Let _S'm denote a set of subcarriers for calculating a first interference covariance matrix in the second resource, and _S'q denotes an OFDM symbol for calculating a first interference covariance matrix in the second resource. The set, |S' _m | is the number of elements included in the set S' _m , and |S' _q | is the number of elements included in the set S' _q ,

   

   Representing a channel vector of the nth interference data stream on RE(m, q) of all receiving antennas of the terminal, RE(m,q) indicating that the RE is located in the mth subcarrier, the qth in the second resource OFDM symbols.
5. The method according to any one of claims 1 to 4, wherein before the terminal determines the first interference and noise covariance matrix according to the second interference covariance matrix, the method further includes:

   Determining, by the terminal, the second residual signal after the DMRS receiving signal corresponding to the DMRS of the terminal and the N-channel interference data stream respectively in the DMRS receiving signal in the second resource; according to the second remaining Signal, determining a second interference and noise covariance matrix;

   Determining, by the terminal, the first interference and noise covariance matrix according to the second interference covariance matrix, including:

   The terminal determines a sum of the second interference covariance matrix and the second interference and noise covariance matrix as the first interference and noise covariance matrix.
6. The method according to any one of claims 1 to 4, wherein before the terminal determines the first interference and noise covariance matrix according to the second interference covariance matrix, the method further includes:

   The terminal estimates a total power of the neighboring interference signal and the noise signal in the second resource, and determines a covariance matrix corresponding to the neighboring area interference signal and the noise signal according to the total power; and the neighboring area interference and The covariance matrix corresponding to the noise is determined as the second interference and noise covariance matrix;

   Determining, by the terminal, the first interference and noise covariance matrix according to the second interference covariance matrix, including:

   The terminal determines a sum of the second interference covariance matrix and the second interference and noise covariance matrix as the first interference and noise covariance matrix.
7. A terminal, wherein the terminal comprises:

   a first processing module, configured to estimate, according to the DMRS configuration information of the demodulation reference signal corresponding to each interference data stream and the DMRS receiving signal on the DMRS port corresponding to each interference data stream, respectively, to estimate the channel of each interference data stream Obtaining a channel vector corresponding to each interference data stream;

   a second processing module, configured to determine, according to a channel vector corresponding to each interference data stream, an N-channel interference data stream with a maximum average power in the first resource, and determine, according to the channel vector corresponding to the N-channel interference data stream, respectively Determining, by the first interference covariance matrix corresponding to the N channels of interference data streams in the second resource, determining a sum of the first interference covariance matrices corresponding to the N channels of interference data streams as a second interference covariance matrix, Where N is a positive integer;

   And a third processing module, configured to determine, according to the second interference covariance matrix, a first interference and a noise covariance matrix.
8. The terminal according to claim 7, wherein the first processing module is specifically configured to:

   Determining, by the first DMRS receiving signal on the DMRS port of the DMRS of the terminal, a first remaining signal after removing the DMRS of the terminal in the first DMRS received signal, and according to the first remaining signal, Estimating a channel of each interference data stream corresponding to the first residual signal to obtain a channel vector corresponding to each interference data stream;

   For the second DMRS receiving signal on the DMRS port of the DMRS that does not carry the terminal, estimating, according to the second DMRS receiving signal, the channel of each interference data stream corresponding to the second DMRS receiving signal, The channel vector corresponding to each interference data stream.
9. The terminal according to claim 7, wherein the first processing module determines the N-channel interference data stream with the largest average power in the first resource according to the channel vector corresponding to each interference data stream. Used for:

   According to the channel vector corresponding to each interference data stream, the average power of the channel vector corresponding to each interference data stream in the first time frequency is determined according to the following formula:

   

   among them,

   

   The average power of the channel vector representing the k-th interference data stream in the first resource, k=1, . . . , K, K represents the total number of channels of the interference data stream, and K is a positive integer, and S _m represents a set of subcarriers for calculating channel vector power in the first resource, S _q represents a set of OFDM symbols used to calculate channel vector power in the first resource, and |S _m | is included in the set S _m The number of elements, |S _q | is the number of elements contained in the set S _q , ||·|| is the norm of the vector,

   

   Representing a channel vector of the kth interference data stream on RE(m, q) of all receiving antennas of the terminal, RE(m, q) indicating that the RE is located in the mth subcarrier, the qth in the first resource OFDM symbols.
10. The terminal according to claim 7, wherein the second processing module determines the N-channel interference data stream in the second resource according to a channel vector corresponding to the N-channel interference data streams according to the following formula: Corresponding first interference covariance matrices:

    

    among them,

    

    Determining a first interference covariance matrix of the nth interference data stream in the N channel interference data stream in the second resource, n=1, . . . , N, [·] ^H is a conjugate rotation of the vector Let _S'm denote a set of subcarriers for calculating a first interference covariance matrix in the second resource, and _S'q denotes an OFDM symbol for calculating a first interference covariance matrix in the second resource. The set, |S' _m | is the number of elements included in the set S' _m , and |S' _q | is the number of elements included in the set S' _q ,

    

    Representing a channel vector of the nth interference data stream on RE(m, q) of all receiving antennas of the terminal, RE(m,q) indicating that the RE is located in the mth subcarrier, the qth in the second resource OFDM symbols.
11. The terminal according to any one of claims 7 to 10, wherein the third processing module is specifically configured to:

    Determining, in all DMRS received signals, a second residual signal after the DMRS received signal corresponding to the DMRS of the terminal and the N-channel interference data stream respectively; determining the second interference and noise according to the second residual signal Covariance matrix;

    And determining, by the sum of the second interference covariance matrix and the second interference and noise covariance matrix, the first interference and noise covariance matrix.
12. The terminal according to any one of claims 7 to 10, wherein the third processing module is specifically configured to:

    Estimating the total power of the neighboring area interference signal and the noise signal, and determining a covariance matrix corresponding to the neighboring area interference signal and the noise signal according to the total power; determining the covariance matrix corresponding to the neighboring area interference and the noise as the second Interference and noise covariance matrix;

    And determining, by the sum of the second interference covariance matrix and the second interference and noise covariance matrix, the first interference and noise covariance matrix.
13. A terminal, wherein the terminal comprises:

    A processor for reading a program in the memory, performing the following process:

    According to the DMRS configuration information corresponding to each interference data stream and the DMRS receiving signal on the DMRS port corresponding to each interference data stream, the channels of each interference data stream are respectively estimated, and the channel vector corresponding to each interference data stream is obtained. And determining, according to the channel vector corresponding to each of the interference data streams, an N-channel interference data stream with the largest average power in the first resource, and determining, according to the channel vector corresponding to the N-channel interference data stream, the second resource Determining, by the N-channel interference data stream, a first interference covariance matrix, respectively, determining a sum of the first interference covariance matrices corresponding to the N-channel interference data streams as a second interference covariance matrix, where N is a positive integer Determining a first interference and noise covariance matrix according to the second interference covariance matrix;

    A receiver for receiving DMRS and/or data streams under the control of a processor.
14. The terminal according to claim 13, wherein the processor is specifically configured to:

    Determining, by the first DMRS receiving signal on the DMRS port of the DMRS of the terminal, a first remaining signal after removing the DMRS of the terminal in the first DMRS received signal, and according to the first remaining signal, Estimating a channel of each interference data stream corresponding to the first residual signal to obtain a channel vector corresponding to each interference data stream;

    For the second DMRS receiving signal on the DMRS port of the DMRS that does not carry the terminal, estimating, according to the second DMRS receiving signal, the channel of each interference data stream corresponding to the second DMRS receiving signal, The channel vector corresponding to each interference data stream.
15. The terminal according to claim 13, wherein the processor is further configured to determine, before the N-channel interference data stream having the largest average power in the first resource, according to a channel vector corresponding to each interference data stream. :

    According to the channel vector corresponding to each interference data stream, the average power of the channel vector corresponding to each interference data stream in the first time frequency is determined according to the following formula:

    

    among them,

    

    The average power of the channel vector representing the k-th interference data stream in the first resource, k=1, . . . , K, K represents the total number of channels of the interference data stream, and K is a positive integer, and S _m represents a set of subcarriers for calculating channel vector power in the first resource, S _q represents a set of OFDM symbols used to calculate channel vector power in the first resource, and |S _m | is included in the set S _m The number of elements, |S _q | is the number of elements contained in the set S _q , ||·|| is the norm of the vector,

    

    Representing a channel vector of the kth interference data stream on RE(m, q) of all receiving antennas of the terminal, RE(m, q) indicating that the RE is located in the mth subcarrier, the qth in the first resource OFDM symbols.
16. The terminal according to claim 13, wherein the processor determines, according to the channel vector corresponding to the N channels of interference data streams, the N channels of interference data streams in the second resource according to the following formula: First interference covariance matrix:

    

    among them,

    

    Determining a first interference covariance matrix of the nth interference data stream in the N channel interference data stream in the second resource, n=1, . . . , N, [·] ^H is a conjugate rotation of the vector Let _S'm denote a set of subcarriers for calculating a first interference covariance matrix in the second resource, and _S'q denotes an OFDM symbol for calculating a first interference covariance matrix in the second resource. The set, |S' _m | is the number of elements included in the set S' _m , and |S' _q | is the number of elements included in the set S' _q ,

    

    Representing a channel vector of the nth interference data stream on RE(m, q) of all receiving antennas of the terminal, RE(m,q) indicating that the RE is located in the mth subcarrier, the qth in the second resource OFDM symbols.
17. The terminal according to any one of claims 13 to 16, wherein the processor is specifically configured to:

    Determining, in all DMRS received signals, a second residual signal after the DMRS received signal corresponding to the DMRS of the terminal and the N-channel interference data stream respectively; determining the second interference and noise according to the second residual signal Covariance matrix;

    And determining, by the sum of the second interference covariance matrix and the second interference and noise covariance matrix, the first interference and noise covariance matrix.
18. The terminal according to any one of claims 13 to 16, wherein the processor is specifically configured to:

    Estimating the total power of the neighboring area interference signal and the noise signal, and determining a covariance matrix corresponding to the neighboring area interference signal and the noise signal according to the total power; determining the covariance matrix corresponding to the neighboring area interference and the noise as the second Interference and noise covariance matrix;

    And determining, by the sum of the second interference covariance matrix and the second interference and noise covariance matrix, the first interference and noise covariance matrix.

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