Nakagami-<i>m</i>信道下无人机辅助的速率分拆多址接入协作通信系统性能研究

黄海燕; 张鸿生; 刘伯阳; 梁琳琳; 王春丽

doi:10.11999/JEIT231385

Nakagami-m信道下无人机辅助的速率分拆多址接入协作通信系统性能研究

doi: 10.11999/JEIT231385 cstr: 32379.14.JEIT231385

1.
兰州交通大学电子与信息工程学院兰州 730070
2.
西安邮电大学通信与信息工程学院西安 710071
3.
西安电子科技大学网络信息安全学院西安 710071

基金项目: 国家自然科学基金(61901201)，兰州交通大学“天佑青年托举人才计划”(本基金无项目编号)，兰州交通大学重点研发项目(ZDYF2304)

详细信息

作者简介:
黄海燕：女，副教授，研究方向为云网边端协同、新型多址接入技术、物理层安全

张鸿生：男，硕士生，研究方向为无人机通信

刘伯阳：男，副教授，研究方向为软件无线电、边缘计算、通感一体化

梁琳琳：男，讲师，研究方向为隐蔽通信、物联网安全

王春丽：女，副教授，研究方向为人工智能、语音通信

通讯作者:
黄海燕　huanghaiyan@mail.lzjtu.cn

中图分类号: TN929.5
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- 被引次数: 0
出版历程
- 收稿日期: 2023-12-14
- 修回日期: 2024-07-17
- 网络出版日期: 2024-07-30
- 刊出日期: 2024-08-30

Performance Investigation of Unmanned Aerial Vehicle Assisted Rate Splitting Multiple Access Cooperative Communication Systems in Nakagami-m Fading Channels

1.
School of Electronic and Information Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
2.
School of Communications and Information Engineering, Xi’an University of Posts and Telecommunications, Xi’an 710071, China
3.
School of Cyber Engineering, Xidian University, Xi’an 710071, China

Funds: The National Natural Science Foundation of China (61901201), The Tianyou Youth Talent Lift Program of Lanzhou Jiaotong University, The Key Research and Development Project of Lanzhou Jiaotong University (ZDYF2304)

摘要

摘要: 针对多用户通信资源短缺、分配不均衡的问题，该文研究了基于速率分拆多址接入技术(RSMA)的无人机(UAV)辅助多用户下行通信网络。在复杂的实际通信环境中，频率复用所引起的无用信号的干扰不可避免，考虑无人机与各用户节点信息传输受共道干扰影响，在Nakagami-m衰落信道下推导了该无人机协作通信系统的中断概率和信道容量的精确闭式表达式，证明共道干扰的存在使得高信噪比(SNR)区域系统的分集阶数为0。结果表明，在相同的空间模型下，采用RSMA通信方案的系统性能优于非正交多址(NOMA)方案；无人机飞行速度增大时，地-空通信建立视距链路的概率降低，系统中断性能下降。因此，在满足用户实际通信的需求时需要综合考虑无人机飞行速度、多址接入方式、系统性能以及通信连通性，以实现对无人机通信系统整体的有效权衡。
- 无人机通信 /
- 速率分拆多址接入 /
- 共道干扰 /
- 视距链路 /
- 中断概率
Abstract: The challenges of scarce communication resources and uneven allocation in multi-user communication networks are investigated in the article with a focus on the Unmanned Aerial Vehicle (UAV)-assisted multi-user downlink communication network using Rate Splitting Multiple Access (RSMA) technology. In complex real-world communication environments, interference caused by useless signals due to frequency reuse is inevitable. Considering the co-channel interference affecting the data transmission between UAV and various user nodes in Nakagami-m fading channels, precise closed-form expressions for the outage probability and channel capacity of the system are derived. It is demonstrated that the diversity order is 0 resulted from the presence of co-channel interference for high Signal-to-Noise Ratio (SNR) regime systems. Moreover, under the same spatial model, the system performance using the RSMA communication scheme is superior to the Non-Orthogonal Multiple Access (NOMA) scheme. As the flight speed of UAV increases, the probability of establishing line-of-sight links for ground-to-air communication is decreased, leading to a degradation in system outage performance. Therefore, effective trade-offs for the overall UAV communication system need to be achieved by comprehensively considering the flight speed of UAV, multiple access methods, system performance, and communication connectivity, in order to meet the practical communication needs of users.
- Unmanned Aerial Vehicle(UAV) communication /
- Rate Splitting Multiple Access (RSMA) /
- Co-channel interference /
- Line of sight link /
- Outage probability

HTML全文

图 1 系统模型

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图 2 信号传输模型

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图 3 空间模型

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图 4 R处的共道干扰数目改变时中断概率随信噪比的变化曲线

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图 5 中断概率与共道干扰源发射功率的关系

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图 6 $ m $变化时RSMA方案与NOMA方案的中断概率对比

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图 7 无人机飞行速度不同时中断概率的变化曲线

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图 8 系统信道容量随信噪比的变化曲线

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表 1 参数设置

P_S(dB) P_R(dB) R_c (bit/(s·Hz)) R_p (bit/(s·Hz)) m $ {{{\varOmega }}_{ab}} $ H(m) $ {\alpha _{\mathrm{T}}} $ K L

参数数值 28 28 0.5 0.5 2 3 100 0.3 10 10

下载: 导出CSV

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