引入深度限幅技术的MIMO-OFDM系统PAPR抑制优化算法  

Deep clipping introduced optimization of a PAPR reduction algorithm for MIMO-OFDM systems

作　　者：蒋阳[1] 袁敏[1] 韩飞飞[1] 郎保才[1] 

机构地区：[1]重庆大学通信工程学院,重庆400044

出　　处：《高技术通讯》2013年第4期345-351,共7页Chinese High Technology Letters

基　　金：国家科技重大专项(1010122720110046)资助项目

摘　　要：针对多输入多输出正交频分复用(MIMO-OFDM)通信系统存在的峰值平均功率比(PAPR)较高的问题,将深度限幅技术和具有很好PAPR抑制性能的预留子载波保留(TR)算法进行了改进优化,提出了一种深度限幅优化的TR算法,并将该算法应用于MIMO-OFDM系统的PAPR抑制性能研究。该算法将系统中的一个天线深度限幅后的补充信号进行处理,然后再应用到其它天线上。通过理论分析与仿真结果表明,该算法不仅能有效抑制MIMO-OFDM系统的PAPR,同时可减小算法的计算复杂度和降低系统误码率。The deep clipping technique and a tone reservation （TR） algorithm with the good performance for reduction of high peak-to-average power ratio （PAPR） of multiple-input multiple-output （MIMO）-orthogonal frequency division multiplexing （OFDM） systems were modified and optimized, and an improved TR algorithm was proposed to solve the high PAPR problem of MIMO-OFDM systems, and it was applied to the research on MIMO-OFDM systems＇ PAPR reduction. This algorithm generates a peak cancellation signal by using deep clipping at only one of the trans- mit antennas, which is then applied to other transmitters in MIMO systems. The system simulation and the theoretical analysis shows that the proposed algorithm can reduce systems＇ PAPR efficiently with the low calculation com- plexity and the low bit-error-ratio （BER）.

关 键 词：多输入多输出(MIMO) 正交频分复用(OFDM) 峰值平均功率比(PAPR) 预留子载波保留(TR) 深度限幅 

分 类 号：TN919.3[电子电信—通信与信息系统]