硬件损伤下IRS辅助下行NOMA短包通信性能分析  

Performance analysis of IRS aided downlink NOMA short-packet communication with hardware impairment

作　　者：袁磊[1] 徐婧 莫名秀 雷妍 YUAN Lei;XU Jing;MO Mingxiu;LEI Yan(School of Information Science and Engineering,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]兰州大学信息科学与工程学院,甘肃兰州730000

出　　处：《通信学报》2023年第11期237-248,共12页Journal on Communications

基　　金：甘肃省自然科学基金资助项目(No.22JR5RA490)。

摘　　要：分析了莱斯信道下硬件损伤对采用非正交多址接入的智能反射表面(IRS)辅助下行两用户短包通信(SPC)系统性能的影响。IRS利用统计信道状态信息进行相位调整。首先,利用中心极限定理、矩匹配方法、SPC相关理论及高斯−切比雪夫正交积分法推导了两用户平均块错误率的解析表达式;其次,在用户可靠性约束下利用二分法和一维搜索算法给出了最优功率分配方案来最小化系统传输时延;最后,仿真结果验证了理论分析的正确性并显示硬件损伤对SPC的影响比长包通信更加显著。Impact of hardware impairment on the performance of intelligent reflecting surface(IRS)aided downlink two-user short-packet communication(SPC)systems using non-orthogonal multiple access over Rician channels was analyzed.Phase adjustments at the IRS were based on statistical channel state information.Firstly,the analytical expressions for average block error rates of two users were derived by using central limit theorem,moment matching method,SPC related theory,and Gaussian-Chebyshev quadrature method.Secondly,to minimize the transmission latency under the reliability constraints of two users,the optimal power allocation scheme for the considered system was given by using the proposed bisection search algorithm and one-dimensional search algorithm.Finally,simulation results verified the correctness of the theoretical analysis and showed that,compared to long-packet communication,hardware impairments have a greater impact on SPC.

关 键 词：硬件损伤 智能反射表面 非正交多址接入 短包通信 统计信道状态信息 

分 类 号：TN92[电子电信—通信与信息系统]