降低多用户大规模MIMO-OFDM系统PAPR的加速近端梯度算法  

Accelerated Proximal Gradient Method for Reducing PAPR of Multi-user Massive MIMO-OFDM Systems

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,江苏镇江212100

出　　处：《电讯技术》2022年第12期1822-1827,共6页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(No.62001194)。

摘　　要：针对多用户大规模多输入多输出(Multiple-Input Multiple-Output,MIMO)正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)系统存在较高峰值平均功率比(Peak-to-Average Power Ratio,PAPR)问题,在系统的下行链路中利用基站大量天线提供的冗余自由度,将OFDM调制、消除多用户之间干扰及降低PAPR联合成凸优化问题,并设计加速近端梯度算法(Accelerated Proximal Gradient Method,APGM)求解上述优化问题。仿真结果表明,所提方法显著降低了发射信号的峰均比,同时获得了较好的系统误符号率。与其他相关方法对比,APGM具有更低的计算复杂度和更快的收敛速度。To solve the high peak-to-average power ratio(PAPR)in orthogonal frequency division multiplexing-based multi-user massive multiple-input multiple-output(MIMO-OFDM)downlink systems,by using the redundant degree of freedom provided by many antennas equipped at a base station,OFDM modulation,multi-user interference elimination and PAPR reduction are combined into a joint convex optimization problem.An Accelerated Proximal Gradient Method(APGM)is designed to address the convex optimization.Simulation results show that the proposed method can significantly reduce the PAPR of the transmitted signal,and obtain a better system symbol error rate.Compared with other methods,APGM has lower complexity and faster convergence.

关 键 词：多输入多输出 正交频分复用 峰值平均功率比抑制 加速近端梯度算法(APGM) 

分 类 号：TN911[电子电信—通信与信息系统]