降低LWT-OFDM系统PAPR的联合算法  

Combined Algorithm of PAPR Reduction for LWT-OFDM System

作　　者：曹型兵[1] 胡崛[1] 张超[1] 

机构地区：[1]重庆邮电大学通信工程应用研究所,重庆400065

出　　处：《数字通信》2014年第6期8-11,共4页Digital Communications and Networks

摘　　要：针对小波提升变换的正交频分复用(LWT-OFDM)系统峰均功率比(PAPR)过高的问题,采用了部分传输序列(PTS)与指数压扩变换的联合算法。首先由PTS算法选出系统中峰值最小的一组信号,再通过指数压扩变换来降低峰均功率比。仿真结果表明,相对于其它的限幅类技术,本文所提联合算法在该系统中能更有效的降低峰均功率比,并且误码率相对较低。To solve the problem of high peak-to-average power ratio of LWT-OFDM system,this paper adopts the combination algorithm of part transmission sequences and exponential companding transformation. First,pick out a set of signal with the smallest peak value through PTS algorithm,and then through exponential companding transformation to reduce PAPR.From the simulation,compared with other limit amplitude technique,the combination algorithm can lower the PAPR effectively in this system,and the bit error rate is relatively low.

关 键 词：小波提升变换 正交频分复用 部分传输序列 压扩变换 峰均功率比 误码率 

分 类 号：TN929.53[电子电信—通信与信息系统]