一种基于压扩变换降低OFDM系统峰均比的方法  

Reduction of Peak to Average Power Ratio of OFDM System Based on Companding Technique

作　　者：艾艳锦[1] 吴长奇[2] 翟艳东[3] 贾景谱[4] 宋欣[1] 

机构地区：[1]天津职业大学电子信息学院,天津300402 [2]燕山大学信息工程学院,河北秦皇岛066004 [3]河北工业大学计算机科学与软件学院,天津300401 [4]石家庄信息工程职业学院,河北石家庄050035

出　　处：《现代电子技术》2007年第13期18-20,24,共4页Modern Electronics Technique

摘　　要：对一种用于减小OFDM信号峰均比的压缩扩展技术进行了分析,该技术能够以相对较小的计算复杂度大大降低OFDM信号的PAPR。作者采用μ率压扩算法,其中的压扩拐点值取为均值而不是传统方法中的峰值。计算机仿真表明这种方法能大大降低OFDM信号的PAPR,并且与PTS技术相比这种方法更有效,计算复杂度也比PTS技术低。This paper analyses the companding technique which can reduce the PAPR of OFDM system,this technique can obviously reduce the PAPR with very small complication,the author uses μ law companding techinique, in which the average power set as the value of transform inflexion point but not the peak value as the conventional companding scheme. Computer simulation shows that this scheme can reduce the PAPR obviously,it is more usefull in practice than PTS,and the complication is lower than PTS.

关 键 词：0FDM PAPR 压扩算法 PTS 

分 类 号：TN914[电子电信—通信与信息系统]