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A Joint Hybrid Precoding Method Based on Channel Equivalence

A precoding and precoding matrix technology, applied in the coding field, can solve the problems of low practicability and high complexity, and achieve the effects of enhancing practicability, improving accuracy, and reducing computational complexity

Active Publication Date: 2022-02-01
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing hybrid precoding technology has the disadvantages of high complexity and poor practicability.

Method used

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  • A Joint Hybrid Precoding Method Based on Channel Equivalence
  • A Joint Hybrid Precoding Method Based on Channel Equivalence
  • A Joint Hybrid Precoding Method Based on Channel Equivalence

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Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0047] Such as figure 1 As shown, a joint hybrid precoding method based on channel equivalence includes the following steps:

[0048] Step 1: Singular value decomposition is performed on the channel matrix H at the transmitter to obtain an all-digital precoding matrix F opt . The specific steps are:

[0049] 1-1) Singular value decomposition is performed on the channel matrix H, namely where U P is an N r ×N r A unitary matrix of dimension, Σ P is an N r ×N t Diagonal matrix of dimension, is an N t ×N t Dimensional unitary matrix, N r is the number of receiving antennas, N t is the number of transmitting antennas;

[0050] 1-2) In order to maximize the channel capacity of the system, it is necessary to maximize the input and output mutual information, that is, reaches the maximum, where and H * respectively F RF ,F RF and the con...

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Abstract

The invention discloses a joint hybrid precoding method based on channel equivalence. First, the singular value decomposition is performed on the channel matrix H at the transmitting end to obtain the all-digital precoding matrix F opt , for F opt Perform singular value decomposition to obtain the analog phase shifter precoding matrix F RF and baseband digital precoding matrix F BB ; Then calculate the equivalent channel matrix and compensated precoding matrix G au ; Then use the minimum mean square error MMSE criterion and auxiliary precoding matrix G at the receiving end au Calculate the full digital combination matrix W opt , and finally for W opt Perform singular value decomposition to obtain the combination matrix W of the analog phase shifter RF and baseband digital combination matrix W BB . The present invention jointly designs the mixed precoding matrix and the combination matrix, and only produces an error once in the design of the combination matrix of the receiver, further improving the accuracy of the system, and the present invention does not need iterative calculation, effectively reducing the calculation complexity.

Description

technical field [0001] The present invention relates to a coding method, in particular to a channel equivalent-based joint hybrid precoding method. Background technique [0002] In wireless communication, due to the increasing demand for data rates, the current wireless frequency bands are becoming more and more crowded. In order to solve the problem of shortage of spectrum resources, massive MIMO technology has become a research hotspot in the academic circles. Massive MIMO technology has the following advantages: (1) It can provide a wealth of spatial freedom; (2) BS can provide services for multiple mobile terminals in the same time-frequency resource; (3) There are more arrival paths, which improves the signal quality. (4) Reduce the interference to surrounding base stations; (5) Improve the average throughput rate of cell edge users. At the same time, the use of effective precoding techniques in massive MIMO systems can reduce system complexity and hardware costs. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0413H04B7/0456
CPCH04B7/0413H04B7/0456
Inventor 王仕果朱敏马银双付学文
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY