Precoding matrix and phase shift matrix optimization method in bidirectional MIMO communication system

A technology of precoding matrix and communication system, which is applied in the field of two-way MIMO communication with enhancement and rate enhancement, and can solve the problems that the wireless communication system cannot meet the demand.

Active Publication Date: 2020-05-15
ZHEJIANG UNIV OF TECH
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Problems solved by technology

With the rapid growth of the demand for communication efficiency and the number of access

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  • Precoding matrix and phase shift matrix optimization method in bidirectional MIMO communication system
  • Precoding matrix and phase shift matrix optimization method in bidirectional MIMO communication system
  • Precoding matrix and phase shift matrix optimization method in bidirectional MIMO communication system

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Embodiment Construction

[0055] The transmission process of the two-way MIMO communication system based on the intelligent reflector is as follows: figure 1 shown. The source node is equipped with N transmitting and receiving antennas, and the number of reflecting units on the smart reflector is M. The channel between the source node and the smart reflector obeys independent Rayleigh distribution. Before the transmission starts, the channel information in the system is collected first, and then the precoding matrix of the source node and the phase shift matrix of the smart reflector are jointly optimized. The transmission process is as follows: two source nodes send signals at the same time, the smart reflector node reflects the information from the source node, and the two source nodes receive the signal from the smart reflector. Specific steps are as follows:

[0056] 1.1) In the two-way multi-antenna communication system assisted by intelligent reflectors, two source nodes S 1 and S 2 Informat...

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Abstract

The invention discloses a precoding matrix and phase shift matrix optimization method in a bidirectional MIMO communication system, and relates to the field of wireless communication. Two source nodesassist in two-way communication through intelligent reflective surfaces. In order to maximize the system sum rate, a precoding matrix of a source node and a phase shift matrix of an intelligent reflecting surface are jointly optimized. The method comprises the steps of 1) establishing a system model; and 2) optimizing the source node precoding matrix and the intelligent reflecting surface phase shift matrix to maximize the sum rate. Aiming at the bidirectional MIMO communication system based on the intelligent reflecting surface assistance, the total transmission rate of the bidirectional communication system can be improved by jointly optimizing the source node precoding matrix and the intelligent reflecting surface phase shift matrix.

Description

technical field [0001] The invention relates to the field of wireless communication, and in particular to a method for enhancing bidirectional MIMO communication by increasing speed and speed in a multi-antenna bidirectional communication system assisted by an intelligent reflector. Background technique [0002] The development of science and technology not only promotes the development of wireless communication technology, but also brings higher communication efficiency requirements. With the rapid increase in the demand for communication efficiency and the number of access devices, the traditional wireless communication system has been unable to meet the demand. [0003] Smart reflective surfaces are one way to improve the communication efficiency of the system. The intelligent reflective surface is a revolutionary technology that integrates some reflective elements into a plane to directly transmit the transmitted information. Each reflective unit is independent, and its...

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Application Information

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IPC IPC(8): H04B7/0456H04B7/08H04L25/02
CPCH04B7/0456H04B7/0857H04L25/0242
Inventor 张昱武学璐彭宏卢为党宋秀兰
Owner ZHEJIANG UNIV OF TECH
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