频率选择性衰落信道DS-CDMA无人机中继通信系统航迹规划

doi:10.7527/S1000-6893.2019.22633

电子电气工程与控制

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频率选择性衰落信道DS-CDMA无人机中继通信系统航迹规划

刘海涛, 顾新宇, 方晓钰, 李冬霞

中国民航大学天津市智能信号与图像处理重点实验室, 天津 300300

收稿日期:2018-08-28 修回日期:2018-12-17 出版日期:2019-07-15 发布日期:2019-04-01
通讯作者: 刘海涛 E-mail:htliucauc@qq.com
基金资助:
国家自然科学基金（U1633108，U1733120）

Path panning for UAV relay communication systems with DS-CDMA over frequency selective fading channel

LIU Haitao, GU Xinyu, FANG Xiaoyu, LI Dongxia

Tianjin Key Lab for Advanced Signal Processing, Civil Aviation University of China, Tianjin 300300, China

Received:2018-08-28 Revised:2018-12-17 Online:2019-07-15 Published:2019-04-01
Supported by:
National Natural Science Foundation of China (U1633108, U1733120)

摘要/Abstract

摘要： 无人机中继通信是实现远距离无线通信的一种重要技术手段，无人机的飞行航迹对无人机中继通信系统的链路传输可靠性存在显著的影响，在频率选择性衰落信道环境下研究了基于直序列码分多址（DS-CDMA）的无人机中继通信系统的航迹优化的问题。首先，给出了基于DS-CDMA的译码转发无人机中继通信系统的模型，并理论分析给出无人机中继通信系统的链路中断概率及平均误码率计算公式，以此为基础，基于链路中断概率最小化准则提出了中继无人机的航迹规划方法，最后通过仿真验证了所提出方法的正确性与有效性。研究表明：最大比值合并DS-CDMA无人机中继通信系统可充分获取频率选择性衰落信道提供的分集增益，显著改善链路传输的可靠性。

关键词: 无人机, 中继通信系统, 直序列码分多址(DS-CDMA), 频率选择性衰落, 航迹规划

Abstract: Unmanned Aerial Vehicle (UAV) relay communication is an important technique for long-range wireless communications. However, the link reliability of a UAV relay communication system is severely influenced by its flying path. This paper investigates the path planning issue of relaying UAV with the Direct Sequence Code Division Multiple Access (DS-CDMA) transmission scheme over frequency selective fading channel. Firstly, the model of UAV relay communication system using decode-and-forward protocol is given. Both the outage probability and the average symbol error probability of the relaying link are derived. Then, a path planning method based on the criterion of minimizing the outage probability is proposed. Finally, computer simulations are provided to verify the correctness of the theoretical results. Our study shows that the proposed system can obtain the diversity gain provided by the frequency selective fading channel, greatly improving the link reliability of the system.

Key words: unmanned aerial vehicle, relay communication systems, Direct Sequence Code Division Multiple Access (DS-CDMA), frequency selective fading channel, path planning

中图分类号:

V243.1

刘海涛, 顾新宇, 方晓钰, 李冬霞. 频率选择性衰落信道DS-CDMA无人机中继通信系统航迹规划[J]. 航空学报, 2019, 40(7): 322633-322633.

LIU Haitao, GU Xinyu, FANG Xiaoyu, LI Dongxia. Path panning for UAV relay communication systems with DS-CDMA over frequency selective fading channel[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019, 40(7): 322633-322633.

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E-mail：hkxb@buaa.edu.cn

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频率选择性衰落信道DS-CDMA无人机中继通信系统航迹规划

Path panning for UAV relay communication systems with DS-CDMA over frequency selective fading channel

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