Performance Analysis of Spatial Modulation Aided UAV Communication Systems in Cooperative Relay Networks  

作　　者：Xiangbin YU Mingfeng XIE Ning LI Cuimin PAN 

机构地区：[1]College of Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China [2]State Key Laboratory of Millimeter Waves,Southeast University,Nanjing 210096,China

出　　处：《Chinese Journal of Electronics》2024年第6期1492-1503,共12页电子学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 61971220 and 62031017)。

摘　　要：In this paper, by introducing the spatial modulation(SM) scheme into the unmanned aerial vehicle(UAV) relaying system, an SM-aided UAV(SM-UAV) cooperative relay network is presented. The performance of the SM-UAV relay network is investigated over Nakagami-m fading channels, where the UAV remains stationary over a given area. According to the performance analysis, using the amplify-and-forward(AF) protocol, the effective signal-to-noise ratio(SNR) and the corresponding probability density function and moment generating function are,respectively, derived. With these results, the average bit error rate(BER) is further deduced, and resultant approximate closed-form expression is achieved. Based on the approximate BER, we derive the asymptotic BER to characterize the error performance of the system at high SNR. With this asymptotic BER, the diversity gain of the system is derived, and the resulting diversity order is attained. Simulation results illustrate the effectiveness of the performance analysis. Namely, approximate BER has the value close to the simulated one, and asymptotic BER can match the corresponding simulation well at high SNR. Thus, the BER performance of the system can be effectively assessed in theory, and conventional simulation will be avoided. Besides, the impacts of the antenna number, modulation order,fading parameter, and UAV position on the system performance are also analyzed. The results indicate that the BER performance is increased with the increases of Nakagami parameter m and/or receive antenna and/or the decrease of modulation order.

关 键 词：Unmanned aerial vehicle relaying Spatial modulation Amplify and forward protocol Bit error rate Diversity gain Cooperative network 

分 类 号：V279[航空宇航科学与技术—飞行器设计] TN929.5[电子电信—通信与信息系统]