A channel estimation method and system based on coprime array system

A channel estimation and array technology, which is applied in the channel estimation method and system field based on a coprime array system, can solve the problems of high computational complexity, low estimation accuracy, and low efficiency of channel estimation, so as to reduce computational complexity and improve estimation Accuracy, wide range of effects

Active Publication Date: 2022-04-19
COMMUNICATION UNIVERSITY OF CHINA
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Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a channel estimation method and system based on a coprime array system to solve the problems of high computational complexity, low efficiency, and low estimation accuracy in existing channel estimation

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  • A channel estimation method and system based on coprime array system
  • A channel estimation method and system based on coprime array system
  • A channel estimation method and system based on coprime array system

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[0062] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention and are not intended to limit the scope of the present invention.

[0063] Specifically, the symbols used in the specific embodiments are described, A represents a matrix, diag(Α) is a vector formed by diagonal elements A, ||A|| F is the Frobenius norm of matrix A. Α * 、A T 、A H 、A -1 with represent the conjugate, transpose, conjugate transpose, inverse and pseudoinverse of a matrix, respectively, Denotes the estimated value of matrix A.

[0064] Channel estimation is to estimate the model parameters of an assumed channel model from the received data. The accuracy of channel estimation will affect the performance of the wireless communication system....

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Abstract

The invention relates to a channel estimation method and system based on a coprime array system, belongs to the field of communication technology, and solves the problems of complicated channel estimation calculation, low efficiency and low estimation precision in the prior art. The method comprises the following steps: obtaining a first signal and a second signal respectively received by the first sub-array and the second sub-array in the coprime array; obtaining the emission angle and the An angle of arrival; calculating an estimated path gain according to the emission angle and the arrival angle; calculating and obtaining a channel estimation value according to the emission angle, the arrival angle, and the estimated path gain. The method narrows down the range of spectrum search by estimating emission angle and arrival angle and path gain, greatly reduces the range of space spectrum search, reduces computational complexity, and improves the efficiency and accuracy of channel estimation.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a channel estimation method and system based on a coprime array system. Background technique [0002] Massive MIMO technology has been widely used in current 5G wireless communication systems, combining millimeter waves with massive MIMO to increase signal power and thus increase transmission distance. Traditional channel estimation techniques for MIMO systems cannot take full advantage of the spatial sparsity of millimeter-wave channels, so the existing millimeter-wave channel estimation problem can be transformed into estimating path direction and path gain. [0003] Existing channel estimation algorithms using spatial spectrum estimation require a large number of complex multiplication operations, and the amount of operations is proportional to the cube of the number of array elements. Therefore, when the number of array elements is large, the computational com...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02
CPCH04L25/0204H04L25/024H04L25/0242
Inventor 李树锋曹广静金立标张乃谦
Owner COMMUNICATION UNIVERSITY OF CHINA
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