降低多用户MIMO系统PAPR的广义SLM算法  

Generalized SLM algorithm applied to reduce PAPR of multi-user MIMO systems

作　　者：韩康祺 钱骅[2] 裴旭明 康凯[2,3] HAN Kangqi;QIAN Hua;PEI Xuming;KANG Kai(School of Microelectronics,University of Chinese Academy of Sciences,Beijing 100049,China;Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China;Key Laboratory of Wireless Sensor Network&Communication,Chinese Academy of Sciences,Shanghai 200050,China)

机构地区：[1]中国科学院大学微电子学院,北京100049 [2]中国科学院上海高等研究院,上海201210 [3]中国科学院无线传感器网络与通信重点实验室,上海200050

出　　处：《系统工程与电子技术》2021年第6期1673-1678,共6页Systems Engineering and Electronics

基　　金：国家自然科学基金(61671436)资助课题。

摘　　要：针对在多用户多输入多输出(multi-user multiple input multiple output,MU-MIMO)系统中,选择性映射(selected mapping,SLM)算法不适用于分布式用户,并且边信息无法在用户之间共享的问题,提出一种适用于MU-MIMO系统的广义SLM算法。该算法通过改变相位旋转的作用对象,将相位旋转进行前置,来解决SLM引入带来的一系列问题。同时,分析了在采用等增益传输波束成形的系统中,使用广义SLM算法时系统的高峰均功率比(peak to average power ratio,PAPR)性能,验证了该算法的有效性。仿真结果也表明了该算法可以有效降低MU-MIMO系统的PAPR。Aiming at the problem that the selective mapping(SLM)algorithm is not suitable for distributed users and the side information cannot be shared among users in multi-user multiple input multiple output(MU-MIMO)system,a generalized SLM algorithm for MU-MIMO system is proposed.The proposed algorithm solves a series of problems caused by the introduction of SLM by changing the object of phase rotation and preposing the phase rotation.At the same time,the peak to average power ratio(PAPR)performance of the system using the generalized SLM algorithm in the system with equal gain transmission beamforming is analyzed,and the effectiveness of the algorithm is verified.Simulation results also show that the algorithm can effectively reduce the PAPR of MU-MIMO system.

关 键 词：多用户多输入多输出 正交频分复用 峰均功率比 选择性映射 

分 类 号：TN92[电子电信—通信与信息系统]