OFDM-UAV中继广播通信系统航迹优化方法

李冬霞; 孟燕; 黄庚铭; 刘海涛

doi:10.19665/j.issn1001-2400.20240305

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OFDM-UAV中继广播通信系统航迹优化方法

信息与通信工程 | 更新时间：2024-11-13

- OFDM-UAV中继广播通信系统航迹优化方法
- Trajectory optimization method for the OFDM-UAV relay broadcast communication system
- 西安电子科技大学学报 2024年51卷第4期页码：91-101
- 作者机构：
  
  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
- 作者简介：
  
  [ "李冬霞(1971—),女,教授,E-mail:[email protected]" ]
  [ "孟燕(1999—),女,中国民航大学硕士研究生,E-mail:[email protected]" ]
  [ "黄庚铭(1998—),男,中国民航大学硕士研究生,E-mail:[email protected]" ]
  [ "刘海涛(1966—),男,教授,E-mail:[email protected]" ]
- 基金信息：
  
  国家自然科学基金(U2233216);国家自然科学基金(62172418);天津市多元投入基金项目青年项目(21JCQNJC00770)
- DOI：10.19665/j.issn1001-2400.20240305
  中图分类号： V243;TN925
- 纸质出版日期：2024-08-20，
  
  网络出版日期：2024-03-21，
  
  收稿日期：2023-04-04，
- 稿件说明：
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李冬霞, 孟燕, 黄庚铭, 等. OFDM-UAV中继广播通信系统航迹优化方法[J]. 西安电子科技大学学报, 2024,51(4):91-101.

Dongxia LI, Yan MENG, Gengming HUANG, et al. Trajectory optimization method for the OFDM-UAV relay broadcast communication system. [J]. Journal of Xidian University, 2024,51(4):91-101.
李冬霞, 孟燕, 黄庚铭, 等. OFDM-UAV中继广播通信系统航迹优化方法[J]. 西安电子科技大学学报, 2024,51(4):91-101. DOI： 10.19665/j.issn1001-2400.20240305.

Dongxia LI, Yan MENG, Gengming HUANG, et al. Trajectory optimization method for the OFDM-UAV relay broadcast communication system. [J]. Journal of Xidian University, 2024,51(4):91-101. DOI： 10.19665/j.issn1001-2400.20240305.

摘要

为了提高无人机中继广播通信系统的性能

针对频率选择性衰落信道

考虑基站到无人机以及无人机到用户的全通信链路

提出了基于正交频分复用(OFDM)技术的无人机中继广播通信系统航迹优化方法。首先提出了基于OFDM的无人机中继广播通信传输模型

对单用户节点中断概率和系统平均中断概率进行理论分析并给出近似计算公式;然后以平均中断概率最小化和最大用户中断概率最小化为优化准则

提出无人机的航迹优化方法并分析了各因素对系统中断性能的影响;最后通过计算机仿真

证明了所提航迹优化方法正确有效。研究表明:在多径信道下

基于OFDM的无人机中继广播通信系统能有效克服频率选择性衰落

且译码转发方式下的连通性优于放大转发方式;基于平均中断概率最小化准则得到的系统中断性能优于最大用户中断概率最小化准则。

Abstract

To improve the performance of the unmanned aerial vehicle (UAV) relay broadcast communication system

taking into consideration the entire communication links from the base station to the UAV and from the UAV to the users

the orthogonal frequency division multiplexing (OFDM) based trajectory optimization method is proposed for the UAV relay broadcast communication system with frequency selective fading channels.First

the OFDM-based UAV relay broadcast communication model is provided.Then

approximate calculation formula for the interruption probability for a single-user node and that for the system average interruption probability are theoretically derived.Furthermore

two trajectory methods for the relay UAV are proposed based on the optimization criteria of minimizing the average interruption probability and minimizing the maximum user interruption probability.The effectiveness and correctness of the proposed optimization method are demonstrated by computer simulations

which indicates that the OFDM-based UAV relay broadcasting communication system can effectively overcome frequency-selective fading

and achieve better connectivity under the decode-and-forward transmission mode than the amplify-and-forward mode in multipath channels.The interruption performance of the system

derived based on the criterion of minimizing average interruption probability

surpasses that obtained by minimizing the maximum user interruption probability criterion.

关键词

无人机中继广播通信正交频分复用航迹优化中断概率

Keywords

UAV relaybroadcast communicationorthogonal frequency division multiplexingtrajectory optimizationinterruption probability

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