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降低LWT-OFDM系统PAPR的联合算法
引用本文:曹型兵,胡崛,张超.降低LWT-OFDM系统PAPR的联合算法[J].数字通信,2014(6):8-11.
作者姓名:曹型兵  胡崛  张超
作者单位:重庆邮电大学 通信工程应用研究所, 重庆 400065;重庆邮电大学 通信工程应用研究所, 重庆 400065;重庆邮电大学 通信工程应用研究所, 重庆 400065
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?

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
修稿时间:8/8/2014 12:00:00 AM

Combined Algorithm of PAPR Reduction for LWT-OFDM System
CAO Xingbing,HU Jue and ZHANG Chao.Combined Algorithm of PAPR Reduction for LWT-OFDM System[J].Digital Communication,2014(6):8-11.
Authors:CAO Xingbing  HU Jue and ZHANG Chao
Affiliation:Institute of Communications Application, Chongqing University of Posts and Telecommunications, Chongqing 400065 P. R. China;Institute of Communications Application, Chongqing University of Posts and Telecommunications, Chongqing 400065 P. R. China;Institute of Communications Application, Chongqing University of Posts and Telecommunications, Chongqing 400065 P. R. China
Abstract: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.
Keywords:lifting wavelet transformation(LWT)  orthogonal frequency division multiplexing(OFDM)  part transmission sequences(PTS)  companding transformation  peak to average power ratio(PAPR)  bit error rate(BER)
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