存在共道干扰时多用户协作网络的中断概率

doi:10.3969/j.issn.0255-8297.2023.04.008

应用科学学报 ›› 2023, Vol. 41 ›› Issue (4): 636-645.doi: 10.3969/j.issn.0255-8297.2023.04.008

存在共道干扰时多用户协作网络的中断概率

黄海燕, 师玉洁, 张学军, 王春丽, 李新颖

兰州交通大学电子与信息工程学院, 甘肃兰州 730070

收稿日期:2021-04-20 发布日期:2023-08-02
通信作者: 黄海燕,副教授,研究方向为协作中继传输、无线携能通信、非正交多址接入。E-mail:huanghaiyan@mail.lzjtu.cn E-mail:huanghaiyan@mail.lzjtu.cn
基金资助:
国家自然科学基金（No. 61901201）；甘肃省青年科技基金计划（No. 20JR5RA387）；兰州交通大学“天佑青年托举人才计划”；甘肃省科技计划（No. 20JR5RA397, No. 20JR10RA273）资助

Outage Probability of Multiuser Cooperative Wireless Networks with Cochannel Interferers

HUANG Haiyan, SHI Yujie, ZHANG Xuejun, WANG Chunli, LI Xinying

College of Electronic and Information Engineering, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China

Received:2021-04-20 Published:2023-08-02

摘要/Abstract

摘要： 针对共道干扰的多源多中继无线协作网络，提出一种基于信号干扰噪声比（signalto interference plus noise ratio,SINR）的最佳“源-中继”选择方案，联合优化协作分集和多用户分集。根据多个源节点与目的节点之间的接收信号，选择具有最大SINR的源节点广播信号至多个中继节点，中继节点采用选择协作解码转发协议通过最佳中继节点将解码后的源节点信号转发至目的节点，目的节点采用最大比合并对协作传输中两跳接收到的信号进行合并。考虑多个共道干扰引起的SINR之间的相关性，推导出在瑞利衰落环境下系统中断概率精确的表达式。实验结果表明，存在共道干扰时多源多中继协作无线网络可以获得分集增益，且增加源节点和中继节点的数目可以弥补由于共道干扰造成的损失，降低中断概率，提高系统性能。

关键词: 多源多中继, 共道干扰, 解码转发, 中断概率

Abstract: By jointly optimizing cooperative diversity and multiuser diversity, an optimal “source-relay” selection scheme is proposed for multi-source and multi-relay wireless cooperative networks with cochannel interference. The source node with the largest SINR is selected to broadcast signals to multiple relay nodes based on the signals received between multiple source nodes and destination nodes. The relay node then forwards the decoded source node signals to the destination node using the selective cooperative decoding and forwarding protocol, and the destination node combines the signals received by the two hops in the cooperative transmission using the maximum ratio combining (MRC). An exact expression for outage probability in Rayleigh fading environments is derived, taking into account the correlation between SINR caused by multiple cochannel interferences. Experimental results demonstrate that increasing the number of source and relay nodes can mitigate the effects of cochannel interference, reducing the outage probability and improving overall system performance while achieving diversity gain.

Key words: multi-source multi-relay, cochannel interference, decode and forward, outage probability

中图分类号:

TN925

黄海燕, 师玉洁, 张学军, 王春丽, 李新颖. 存在共道干扰时多用户协作网络的中断概率[J]. 应用科学学报, 2023, 41(4): 636-645.

HUANG Haiyan, SHI Yujie, ZHANG Xuejun, WANG Chunli, LI Xinying. Outage Probability of Multiuser Cooperative Wireless Networks with Cochannel Interferers[J]. Journal of Applied Sciences, 2023, 41(4): 636-645.

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存在共道干扰时多用户协作网络的中断概率

Outage Probability of Multiuser Cooperative Wireless Networks with Cochannel Interferers

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