基于SC/MRC的智能多无人机通信系统分析

doi:10.13229/j.cnki.jdxbgxb.20231445

摘要/Abstract

摘要：

针对通信设备数量增多及无人机协作通信过程中存在共道干扰的问题，本文搭建了存在多路共道干扰的多无人机协作通信系统。该系统中，源节点与目的节点间存在直接链路，目的节点采用选择合并或最大比合并技术合并源节点与最佳无人机中继传输的信号。考虑由多路共道干扰引起的信干噪比之间的相关性，在Nakagami-m衰落信道下，分别推导了选择合并策略与最大比合并策略的系统中断概率精确表达式。为进一步讨论共道干扰对无人机协作通信系统性能的影响，推导出高信噪比下的系统渐近中断概率并进行具体分析。结果表明：受共道干扰的影响，系统中断概率在高信噪比区域存在饱和值；随着Nakagami-m衰落参数 $m$ 的增大，系统中断性能显著提升；随着无人机数量的增多，在达到饱和值之前，系统中断概率会获得更多的分集增益。

关键词: 无人机通信, 共道干扰, 选择合并, 最大比合并, 中断概率

Abstract:

To address the issues of the increase in the number of communication devices and the co-channel interference existing in unmanned aerial vehicle （UAV） cooperative communication process， in this paper a multi-UAVs system with multi-channel co-channel interference is constructed. In this system， there is a direct link between the source node and the destination node， the destination employs either selection combining （SC） or maximal ratio combining （MRC） technology to integrate the signals transmitted from the source node and the optimal UAV relay. Considering the correlation between signal to interference plus noise ratio （SINR） caused by co-channel interferences， the precise expressions for the system outage probabilities with the SC strategy and MRC strategy separately under Nakagami-m fading channels are derived. To further discuss the impact of co-channel interference on the performance of the UAV communication system， the asymptotic outage probability of the system under high signal to noise ratio （SNR） is derived and analyzed in detail. The results show that due to the influence of co-channel interference， the system outage probability exhibits a saturation value in the high signal to noise ratio region； as the Nakagami-m fading parameter $m$ increases， the system outage performance is significantly enhanced； with the increase in the number of UAVs， the system outage probability gains more diversity benefits before reaching the saturation value.

Key words: unmanned aerial vehicle communication, co-channel interference, selection combining, maximal ratio combining, outage probability

中图分类号:

TN929.5

黄海燕,张鸿生,梁琳琳,王春丽,张学军. 基于SC/MRC的智能多无人机通信系统分析[J]. 吉林大学学报(工学版), 2025, 55(10): 3401-3409.

Hai-yan HUANG,Hong-sheng ZHANG,Lin-lin LIANG,Chun-li WANG,Xue-jun ZHANG. Analysis of intelligent communication system with multi-UAVs based on SC/MRC[J]. Journal of Jilin University(Engineering and Technology Edition), 2025, 55(10): 3401-3409.

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