基于小波提升算法的OFDM系统及其峰均比特性分析  

LWT based OFDM system and its PAPR analyzing

作　　者：高建波[1] 吴炯星[1] 赵尔沅[1] 乐光新[1] 

机构地区：[1]北京邮电大学

出　　处：《电子测量技术》2007年第1期72-75,79,共5页Electronic Measurement Technology

基　　金：国家自然科学基金(69972010)项目资助

摘　　要：提供大的系统带宽及具有更高的频谱利用率是未来移动通信系统(Beyond3G或4G)最为关心的问题。本文基于小波理论及其提升算法,利用小波的高频谱效率特性,提出了一种基于小波提升理论的正交频分复用(LWT-OFDM)系统,建立了完善的数学模型及计算机仿真系统,并进一步对小波提升变换OFDM及傅里叶变换OFDM的峰均比特性进行了深入的研究,仿真与实验结果表明:基于小波提升的OFDM系统峰均比特性远远优于传统OFDM系统。The most important thing for future mobile telecommunications system （Beyond 3G and 4G） is providing the biggest system bandwidth and having the high efficient spectral utilization rate. This paper based wavelet theory and wavelet lifting scheme presented a new OFDM system （LWT-OFDM） due to superior spectral containment of wavelet filters. At the same time we setup a perfect mathematic model and a computer simulation system in order to study the PAPR of the lifting wavelet based OFDM and the Fourier based OFDM. The simulation resolution shows that the performance of the wavelet lifting based OFDM＇s PAPR is better than Fourier based OFDM.

关 键 词：信号处理 BEYOND 3G 4G OFDM 小波变换 小波提升 

分 类 号：TN929.5[电子电信—通信与信息系统]