西安电子科技大学学报（自然科学版）2024，Vol.51Issue(4)：91-101,11.DOI:10.19665/j.issn1001-2400.20240305
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
摘要
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Key words
UAV relay/broadcast communication/orthogonal frequency division multiplexing/trajectory optimization/interruption probability分类
航空航天引用本文复制引用
李冬霞,孟燕,黄庚铭,刘海涛..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（自然科学版）,2024,51(4):91-101,11.基金项目
国家自然科学基金(U2233216,62172418) （U2233216,62172418）
天津市多元投入基金项目青年项目(21JCQNJC00770) （21JCQNJC00770）
