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Intelligent reflecting surface enhanced wireless forward link transmission method in cloud access network

A technology of cloud access network and link transmission, which is applied in the direction of radio transmission system, transmission system, electrical components, etc., and can solve the problem that the wireless communication system cannot meet the needs

Active Publication Date: 2021-04-02
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rapid growth of the demand for communication efficiency and the number of access devices, the traditional wireless communication system has been unable to meet the demand

Method used

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  • Intelligent reflecting surface enhanced wireless forward link transmission method in cloud access network
  • Intelligent reflecting surface enhanced wireless forward link transmission method in cloud access network
  • Intelligent reflecting surface enhanced wireless forward link transmission method in cloud access network

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Embodiment Construction

[0082] The present invention will be further described below in conjunction with the accompanying drawings of the description.

[0083] Such as Figure 1-2 Shown: The transmission method of the wireless fronthaul link enhanced by the intelligent reflector in the cloud access network. For the communication system transmission process of the wireless fronthaul link assisted by the intelligent reflector in the cloud access network, before the transmission starts, the BBU pool first obtains the wireless fronthaul link in the system. channel information, and then jointly optimize the fronthaul link quantization noise covariance matrix, user and RRH precoding matrix, and reflector phase shift matrix. The transmission process is as follows: K multi-antenna users communicate with the multi-antenna BBU pool through L multi-antenna RRHs, and an IRS is placed in the wireless fronthaul link, so that the BBU pool receives reflections from the RRH direct link and the smart reflector. The s...

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Abstract

The invention discloses an intelligent reflector enhanced wireless forward link transmission method in a cloud access network, and relates to a beam forming and forward compression joint optimizationmethod in a communication system of an intelligent reflector IRS assisted uplink cloud access network C-RAN forward link. A multi-antenna user communicates with a multi-antenna baseband processing unit (BBU) pool through a multi-antenna RRH, the RRH compresses a received signal by adopting Wyner-Ziv coding, and quantized information is sent to the BBU pool through a wireless forward link under theassistance of an intelligent reflecting surface. In order to maximize the system sum rate, the quantization noise covariance matrix, the user and RRH precoding matrix and the phase shift matrix of the reflecting surface are jointly optimized, and the total uplink transmission rate of the cloud access network communication system can be effectively improved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method for enhancing wireless fronthaul link transmission by an intelligent reflection surface in a cloud access network, and improving communication quality by increasing uplink speed and speed. 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 and directly transmits the transmitted information. Each reflective unit is in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0456H04B7/0426
CPCH04B7/0456H04B7/0426
Inventor 张昱何宣宣孟利民卢为党黄国兴
Owner ZHEJIANG UNIV OF TECH