Multi-antenna multicast transmission method for symbiotic communication system based on smart reflective surface

A reflective surface, multicast transmission technology, applied in diversity/multi-antenna systems, wireless communication, transmission systems, etc., can solve the problems of reflective link fading, limited enhancement of main system communication performance, etc., and achieve the minimum transmit power. the effect of saving the transmission power and energy of the base station

Active Publication Date: 2022-03-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0003] Due to the serious fading of the reflective link, its enhancement effect on the communication performance of the main system is still limited

Method used

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  • Multi-antenna multicast transmission method for symbiotic communication system based on smart reflective surface
  • Multi-antenna multicast transmission method for symbiotic communication system based on smart reflective surface
  • Multi-antenna multicast transmission method for symbiotic communication system based on smart reflective surface

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and simulation examples.

[0028] The present invention proposes a multi-antenna multicast transmission method for a symbiotic communication system based on an intelligent reflective surface: the system composition structure is as follows figure 1 As shown, it consists of a base station configured with M antennas, an IoT receiver configured with Q antennas, a smart reflective surface containing N passive reflective units and an IRS controller connected to it, and K single-antenna main receivers composition. Among them, K main receivers are divided into G groups according to different information requirements, The main receivers in the same group request the same information at the same time, and each main receiver can only belong to one group, that is, the main receiver Let M≥1, Q≥1, K≥1, 1≤G≤K.

[0029]The basic working principle of the multi-antenna multicast t...

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Abstract

The invention belongs to the technical field of wireless communication, and relates to a multi-antenna multicast transmission method of a symbiotic communication system based on an intelligent reflective surface. The present invention proposes a multi-antenna multicast transmission method for a symbiotic communication system based on an intelligent reflective surface. The intelligent reflective surface sends its own Internet of Things information symbols through the multicast signal of the main system, and the downlink multicast transmission from the base station to the main receiver is Can be augmented by smart surfaces, both the main receiver and the IoT receiver receive the direct link signal from the base station and the reflected signal from the smart surface. The present invention also proposes a method for jointly optimizing the active beamforming W at the base station and the passive beamforming Φ at the smart surface, to achieve the base station transmitting Power is minimized. Through simulation verification, the present invention greatly saves the transmission power and energy of the base station without affecting the normal communication of the main system, and does not increase spectrum and cost overhead.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a multi-antenna multicast transmission method of a symbiotic communication system based on an intelligent reflective surface. Background technique [0002] Symbiotic Radio (SR) is a wireless communication technology with extremely high energy efficiency, high spectral efficiency and extremely low cost proposed based on environmental backscatter communication. , IoT) has important application prospects. Specifically, the passive backscatter device can modulate its own information onto the received main system communication signal for IoT transmission, and in return, the reflective link can provide additional multipath to enhance the main system communication, thus realizing Reciprocity in symbiotic radio. [0003] Due to the severe fading of reflective links, their enhancement effect on the communication performance of the main system is still limited....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/08H04W52/02
CPCH04B7/0857H04B7/086H04W52/0206Y02D30/70
Inventor 梁应敞杨刚舒凡一
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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