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Beam forming optimization method based on energy efficiency priority in IRS-assisted SWIPT system

A beamforming and optimization method technology, applied in transmission systems, radio relay systems, passive electrical relay systems, etc., can solve problems such as uncontrollable and random signal propagation

Pending Publication Date: 2021-10-26
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although 5G physical layer technology is generally able to adapt to changes in the wireless environment, the propagation of signals is inherently random and largely uncontrollable

Method used

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  • Beam forming optimization method based on energy efficiency priority in IRS-assisted SWIPT system
  • Beam forming optimization method based on energy efficiency priority in IRS-assisted SWIPT system
  • Beam forming optimization method based on energy efficiency priority in IRS-assisted SWIPT system

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Experimental program
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Embodiment Construction

[0062] figure 1 Scene diagram of SWIPT system assisted by IRS. The SWIPT system consists of the sending end (base station) ST, intelligent reflector IRS, IRS controller, K E energy harvesting node K I information decoding receiving node composition. Among them, the number of ST transmitting antennas is M, the number of IRS reflection array sources is L, and the IRS is connected to the ST through an IRS controller. Assuming that both ST and IRS obtain statistical CSI through channel estimation, IRS receives information and energy from ST, and then reflects the information to the information decoding receiving node through the planar array source, and reflects the energy to the energy harvesting receiving node.

[0063] figure 2 A 3D model diagram of the SWIPT system assisted by the IRS. Among them, d SI is the horizontal distance between ST and IRS, d v Indicates the vertical distance between SR and IRS and the ST horizontal plane, defining the path loss L(d)=T 0 (...

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Abstract

The invention discloses a beam forming optimization method based on energy efficiency priority in an IRS-assisted SWIPT system. The method comprises the following steps: 1, assuming and modeling a scene of an IRS-assisted SWIPT system; 2, designing an optimal receiving end energy threshold value; 3, fixing an IRS phase shift matrix and designing an active beam forming vector; and 4, fixing an active beam forming vector and designing IRS phase shift matrix. According to the IRS-assisted SWIPT system, the energy threshold value of the system energy collection receiving end can be remarkably reduced. The IRS can effectively improve the efficiency of energy collection and information decoding of the SWIPT system, and when the number of reflection array sources of the IRS and the number of antennas of the transmitting end are both maximum values, the system can reach the maximum energy efficiency.

Description

technical field [0001] The invention belongs to the field of information and communication engineering, and proposes multi-antenna active beamforming and intelligent reflection based on energy efficiency priority in an intelligent reflecting surface (Intelligent Reflecting Surface, IRS) assisted wireless portable communication (Simultaneous Wireless Information and Power Transfer, SWIPT) system An optimization method for surface passive beamforming. This method effectively improves the efficiency of energy collection and information decoding of the SWIPT system, and can significantly reduce the energy threshold of the receiving end of the system energy collection, improving the overall energy efficiency of the system. Background technique [0002] The intelligent reflective surface (IRS) is a planar array composed of multiple low-cost reconfigurable passive reflective units, and its working mode is coordinated by a software controller. Each element can control the reflection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/0426H04B7/145H04W52/24H04W52/26
CPCH04B7/0617H04B7/0426H04B7/145H04W52/241H04W52/265H04B7/04013
Inventor 许晓荣朱薇薇朱卫平包建荣
Owner HANGZHOU DIANZI UNIV
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