阅读说明：本技术 信息获取方法、装置、设备和存储介质 (Information acquisition method, device, equipment and storage medium ) 是由 王绪振 张玥 马欣 叶威 于 2018-02-14 设计创作，主要内容包括：本申请提供一种信息获取方法、装置、设备和存储介质,该方法包括：对频域信道信息进行离散傅里叶逆变换IDFT变换,获取时域信道信息；对所述时域信道信息进行幅度两级量化和相位量化,获取信道状态信息；将所述信道状态信息发送给网络设备,终端侧经过频域到时域的变换,使得信道状态信息更加稀疏,可以降低信道状态信息反馈量,并且,通过幅度两级量化可以实现在增加很少反馈量的基础上,提高信道反馈的精度。(The application provides an information acquisition method, an information acquisition device, information acquisition equipment and a storage medium, wherein the method comprises the following steps: carrying out Inverse Discrete Fourier Transform (IDFT) on the frequency domain channel information to obtain time domain channel information; carrying out amplitude two-stage quantization and phase quantization on the time domain channel information to obtain channel state information; and the channel state information is sent to network equipment, and the terminal side makes the channel state information more sparse through the transformation from a frequency domain to a time domain, so that the feedback quantity of the channel state information can be reduced, and the precision of channel feedback can be improved on the basis of increasing little feedback quantity through amplitude two-stage quantization.)

An information acquisition method, comprising:

carrying out Inverse Discrete Fourier Transform (IDFT) on the frequency domain channel information to obtain time domain channel information;

carrying out amplitude two-stage quantization and phase quantization on the time domain channel information to obtain channel state information;

and sending the channel state information to network equipment.

The method of claim 1, wherein the performing amplitude two-stage quantization and phase quantization on the time-domain channel information to obtain channel state information comprises:

acquiring the power of the time domain channel information of each path, and sequencing the power from large to small;

and performing amplitude two-stage quantization and phase quantization on the time domain channel information corresponding to the first M powers to acquire the channel state information.

The method of claim 2, wherein the obtaining the power of the time domain channel information of each path comprises:

obtaining the kth_pathPower of time domain channel information of path

Wherein k is_pathFor multipath index, i_portIs a port index, N_DFTThe number of the delay path is the number of the time delay path.

The method according to any one of claims 1 to 3, wherein the performing amplitude two-stage quantization and phase quantization on the time-domain channel information to obtain channel state information comprises:

determining L codebooks for the time domain channel information of each path, and determining a codebook selection matrix according to the L codebooks for the time domain channel information of each path;

respectively carrying out correlation processing on the channel information in the first polarization direction, the channel information in the second polarization direction and the corresponding L codebooks of each path to obtain a correlation coefficient of each path;

acquiring a first weighting coefficient matrix according to the correlation coefficient of each path;

carrying out amplitude two-stage quantization and phase quantization on the first weighting coefficient matrix to obtain a codebook weighting coefficient matrix;

and acquiring the channel state information according to the codebook selection matrix and the codebook weighting coefficient matrix.

The method of claim 4, wherein the quantizing the weighting coefficient matrix in two levels of amplitudes comprises:

selecting a first element with the largest weighting coefficient in each row from the first weighting coefficient matrix to form a second weighting coefficient matrix;

selecting a second element with the largest weighting coefficient from the second weighting coefficient matrix;

normalizing each element in the second weighting coefficient matrix by using the second element to obtain a third weighting coefficient matrix;

quantizing the third weighting coefficient matrix by adopting a first quantization bit to obtain a first-level amplitude quantization result;

normalizing the correlation coefficient of each path according to the first-stage amplitude quantization result to obtain a normalized correlation coefficient of each path;

and quantizing the normalized correlation coefficient of each path by adopting a second quantization bit to obtain a second-level amplitude quantization result.

The method of claim 5, wherein the phase quantizing the weighting coefficient matrix comprises:

and performing phase quantization on each element in the first weighting coefficient matrix by adopting a preset phase modulation method to obtain a phase quantization matrix.

The method of claim 6,

the codebook selection matrix isB is a codebook corresponding to the time domain channel information of each path, and M is the number of delay paths;

the correlation coefficient of each path is omega_i＝[ω_i,1,…,ω_i,L,ω_i,L+1,…,ω_i,2L]_2L*1(ii) a Wherein, i is an index of the delay path;

the first weighting coefficient matrix is

The second weighting coefficient matrix isWherein the first element is

The first level amplitude quantization results in

The second level amplitude quantization result of the ith path is p_2,i＝[p_2,i,1...p_2,i,2L]_1*2L；

The phase quantization matrix is

The codebook weighting coefficient matrix is omega_quan＝[p₁]_M*1.[p₂]_M*2L.[Φ]_M*2L。

The method according to any one of claims 1 to 7, wherein performing an Inverse Discrete Fourier Transform (IDFT) on the frequency domain channel information to obtain time domain channel information comprises:

performing the IDFT transformation on the information of each transmit-receive antenna link in the frequency domain channel information H according to formula (2), to obtain the time domain channel information Ψ;

Ψ(i_port,:)＝IDFT(H(i_port,:)),i_port∈{1,...,N_port} (2)

wherein i_portIs indexed for the port.

The method according to any one of claims 1-8, wherein before performing an Inverse Discrete Fourier Transform (IDFT) on the frequency domain channel information to obtain the time domain channel information, the method further comprises:

receiving pilot frequency information sent by network equipment;

and performing channel estimation according to the pilot frequency information to acquire the frequency domain channel information.

The method according to claim 9, wherein if the antenna of the terminal device is configured as at least two receiving chains, the performing channel estimation according to the pilot information to obtain the frequency domain channel information comprises:

acquiring channel feedback information of each resource block according to the pilot frequency information;

singular value decomposition is carried out on the channel feedback information of each resource block to obtain corresponding eigenvectors, and the eigenvectors are sequenced according to the sequence of the eigenvalues from large to small;

judging the rank of the channel state information;

if the rank of the channel state information is 1, integrating the channel information of at least two receiving links into the frequency domain channel information according to the eigenvector with the largest eigenvalue;

and if the rank of the channel state information is 2, integrating the channel information of at least two receiving links into first frequency domain channel information and second frequency domain channel information according to the eigenvectors corresponding to the first two eigenvalues respectively.

An information acquisition method, comprising:

receiving channel state information sent by a terminal;

channel reconstruction is carried out according to the channel state information to obtain time domain channel information;

and performing discrete Fourier transform on the time domain channel information to acquire frequency domain channel information.

The method of claim 11, wherein the performing channel reconstruction according to the channel state information to obtain time domain channel information comprises:

to k is paired₁,…,k_MPerforming zero filling on the weight values of the time delay paths except the corresponding time delay path, and performing channel reconstruction on the M time delay paths according to a formula (3) to acquire the time domain channel information H_time；

Wherein, B_iSelecting the ith row, ω, of the matrix for the codebook_{quan_i}Is the ith row, k, of the codebook weighting coefficient matrix_iFor time domain multipath delay indication, N_portFor port index, L is the codebook number corresponding to the time domain channel information of each path;

the codebook selection matrix is

The codebook weighting coefficient matrix is omega_quan＝[p₁]_M*1.[p₂]_M*2L.[Φ]_M*2L；

p₁For the result of the first level of amplitude quantization,

p₂said of the ith path for the second level amplitude quantization resultThe second level amplitude quantization results in p_2,i＝[p_2,i,1...p_2,i,2L]_1*2L；

Phi is a phase quantization matrix and phi is a phase quantization matrix,

the method according to claim 11 or 12, wherein the method further comprises, before the receiving the channel state information sent by the terminal:

and sending pilot frequency information to a terminal so that the terminal carries out channel estimation according to the pilot frequency information.

The method of claim 11, wherein the performing channel reconstruction according to the channel state information to obtain time domain channel information comprises:

determining a rank of the channel state information;

if the rank of the channel state information is 1, channel reconstruction is carried out according to a formula (4) to obtain time domain channel information

If the rank of the channel state information is 2, channel reconstruction is carried out according to a formula (5) to obtain time domain channel information

Wherein the content of the first and second substances,

An information acquisition apparatus characterized by comprising:

the transformation module is used for carrying out Inverse Discrete Fourier Transform (IDFT) on the frequency domain channel information to obtain time domain channel information;

the quantization module is used for carrying out amplitude two-stage quantization and phase quantization on the time domain channel information to obtain channel state information;

and the sending module is used for sending the channel state information to network equipment.

The apparatus according to claim 15, wherein the quantization module is specifically configured to obtain a power of the time domain channel information of each path, and sort the powers in descending order; and performing amplitude two-stage quantization and phase quantization on the time domain channel information corresponding to the first M powers to acquire the channel state information.

The apparatus of claim 16, wherein the quantization module obtains power of the time domain channel information of each path, comprising:

the quantization module obtains the kth according to formula (1)_pathPower of time domain channel information of path

Wherein k is_pathFor multipath index, i_portIs a port index, N_DFTThe number of the delay path is the number of the time delay path.

The apparatus according to any one of claims 15-17, wherein the quantizing module performs amplitude two-stage quantization and phase quantization on the time-domain channel information to obtain channel state information, and comprises:

the quantization module determines L codebooks for the time domain channel information of each path, and determines a codebook selection matrix according to the L codebooks for the time domain channel information of each path; respectively carrying out correlation processing on the channel information in the first polarization direction, the channel information in the second polarization direction and the corresponding L codebooks of each path to obtain a correlation coefficient of each path; acquiring a first weighting coefficient matrix according to the correlation coefficient of each path; carrying out amplitude two-stage quantization and phase quantization on the first weighting coefficient matrix to obtain a codebook weighting coefficient matrix; and acquiring the channel state information according to the codebook selection matrix and the codebook weighting coefficient matrix.

The apparatus of claim 18, wherein the quantization module performs amplitude two-stage quantization on the weighting coefficient matrix, and comprises:

the quantization module selects a first element with the largest weighting coefficient in each row from the first weighting coefficient matrix to form a second weighting coefficient matrix; selecting a second element with the largest weighting coefficient from the second weighting coefficient matrix; normalizing each element in the second weighting coefficient matrix by using the second element to obtain a third weighting coefficient matrix; quantizing the third weighting coefficient matrix by adopting a first quantization bit to obtain a first-level amplitude quantization result; normalizing the correlation coefficient of each path according to the first-stage amplitude quantization result to obtain a normalized correlation coefficient of each path; and quantizing the normalized correlation coefficient of each path by adopting a second quantization bit to obtain a second-level amplitude quantization result.

The apparatus of claim 19, wherein the quantization module performs phase quantization on the weighting coefficient matrix, and comprises:

and the quantization module performs phase quantization on each element in the first weighting coefficient matrix by adopting a preset phase modulation method to obtain a phase quantization matrix.

The apparatus of claim 20,

the codebook selection matrix is

the correlation coefficient of each path is omega_i＝[ω_i,1,…,ω_i,L,ω_i,L+1,…,ω_i,2L]_2L*1(ii) a Wherein, i is an index of the delay path;

the first weighting coefficient matrix is

The second weighting coefficient matrix isWherein the first element isThe second element is

The first level amplitude quantization results in

The second level amplitude quantization result of the ith path is p_2,i＝[p_2,i,1...p_2,i,2L]_1*2L；

The phase quantization matrix is

The codebook weighting coefficient matrix is omega_quan＝[p₁]_M*1.[p₂]_M*2L.[Φ]_M*2L。

The apparatus according to any of claims 15-21, wherein the transforming module is specifically configured to perform the IDFT transformation on the information of each transceiving antenna link in the frequency domain channel information H according to formula (2) to obtain the time domain channel information Ψ;

Ψ(i_port,:)＝IDFT(H(i_port,:)),i_port∈{1,...,N_port} (2)

wherein i_portIs indexed for the port.

The apparatus according to any of claims 15-22, wherein if the antenna of the terminal device is configured as at least two receive chains, the apparatus further comprises:

the acquisition module is used for acquiring the channel feedback information of each resource block according to the pilot frequency information; singular value decomposition is carried out on the channel feedback information of each resource block to obtain corresponding eigenvectors, and the eigenvectors are sequenced according to the sequence of the eigenvalues from large to small; judging the rank of the channel state information; if the rank of the channel state information is 1, integrating the channel information of at least two receiving links into the frequency domain channel information according to the eigenvector with the largest eigenvalue; and if the rank of the channel state information is 2, integrating the channel information of at least two receiving links into first frequency domain channel information and second frequency domain channel information according to the eigenvectors corresponding to the first two eigenvalues respectively.

An information acquisition apparatus characterized by comprising:

the receiving module is used for receiving the channel state information sent by the terminal;

an obtaining module, configured to perform channel reconstruction according to the channel state information to obtain time domain channel information;

and the transformation module is used for carrying out discrete Fourier transformation on the time domain channel information to obtain frequency domain channel information.

The apparatus of claim 24, wherein the obtaining module is specifically configured to pair k₁,…,k_MPerforming zero filling on the weight values of the time delay paths except the corresponding time delay path, and performing channel reconstruction on the M time delay paths according to a formula (3) to acquire the time domain channel information H_time；

Wherein, B_iSelecting the ith row, ω, of the matrix for the codebook_{quan_i}Is the ith row, k, of the codebook weighting coefficient matrix_iFor time domain multipath delay indication, N_portFor port index, L is the codebook number corresponding to the time domain channel information of each path;

the codebook selection matrix is

The codebook weighting coefficient matrix is omega_quan＝[p₁]_M*1.[p₂]_M*2L.[Φ]_M*2L；

p₁For the result of the first level of amplitude quantization,

p₂for a second level amplitude quantization result, the second level amplitude quantization result for the ith path is p_2,i＝[p_2,i,1...p_2,i,2L]_1*2L；

Phi is a phase quantization matrix and phi is a phase quantization matrix,

the apparatus of claim 24, wherein the obtaining module is specifically configured to determine a rank of the channel state information;

if the rank of the channel state information is 1, channel reconstruction is carried out according to a formula (4) to obtain time domain channel information

If the rank of the channel state information is 2, channel reconstruction is carried out according to a formula (5) to obtain time domain channel information

Wherein the content of the first and second substances,

The method of any one of claims 1-14 or the apparatus of any one of claims 15-26, wherein the channel state information comprises time domain multipath delay indication information, codebook selection indication information, and codebook weighting factor information.

A terminal characterized by a processor and a memory,

the memory is configured to store instructions and the processor is configured to execute the memory-stored instructions, and when the processor executes the memory-stored instructions, the terminal is configured to perform the method of any of claims 1 to 10.

A network device, characterized by a processor and a memory,

the memory is configured to store instructions and the processor is configured to execute the memory-stored instructions, and when the processor executes the memory-stored instructions, the network device is configured to perform the method of any of claims 11 to 14.

A computer-readable storage medium on which a computer program is stored, the program, when being executed by a processor, implementing the steps of the information acquisition method according to any one of claims 1 to 14.