基于凸优化的大规模MU-MIMO-OFDM系统峰值平均功率比抑制方法  

PAPR suppression method based on convex optimizationin the MU-MIMO-OFDM system

作　　者：华磊 王亚军 刘爽 HUA Lei;WANG Yajun;LIU Shuang(Ocean College,Jiangsu University of Science and Technology,Zhenjiang 212100,China)

机构地区：[1]江苏科技大学海洋学院,镇江212100

出　　处：《江苏科技大学学报（自然科学版）》2023年第5期58-64,86,共8页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(61371114,62001194)。

摘　　要：为了提高大规模多用户-多输入多输出-正交频分复用系统运行效率以及降低系统硬件花费,将凸优化方法引入MU-MIMO-OFDM系统的下行链路中,从而降低发射信号的峰值平均功率比.首先,将多用户预编码、OFDM调制、降低发射信号PAPR及发射信号功率约束建立成数学模型.然后,设计线性交替方向乘子法(linear alternating direction multiplier method,LADMM)求解凸优化问题.仿真结果表明,该方法只需较少的计算复杂度就可在大规模MU-MIMO-OFDM系统中获得很好的降低发射信号峰均比效果,同时具有较低的符号错误率.In order to improve the operating efficiency of the large-scale multi-user-multi-input-multi-output-orthogonal frequency division multiplexing system and reduce the system hardware cost,the convex optimization method is introduced into the downlink of the MU-MIMO-OFDM system,thereby reducing the peak value of the transmitted signal average power ratio.Firstly,multi-user precoding,OFDM modulation,PAPR reduction and transmission signal power constraints are established as mathematical models.Then,the linear alternating direction multiplier method(LADMM)is designed to solve the convex optimization problem.The simulation results show that this method can achieve a remarkable reduction in the peak-to-average ratio of the transmitted signal in a large-scale MU-MIMO-OFDM system with less computational complexity,and at the same time has a lower symbol error rate.

关 键 词：多输入多输出 正交频分复用 峰值平均功率比 线性交替方向乘子法 凸优化 

分 类 号：TN92[电子电信—通信与信息系统]