Efficient nonlinear companding scheme for substantial reduction in peak-to-average power ratio of OFDM  

作　　者：Kasun Bandara Atul Sewaiwar Yeon-Ho Chung 

机构地区：[1]Department of Information and Communications Engineering, Pukyong National University

出　　处：《Journal of Systems Science & Complexity》2015年第5期924-931,共8页系统科学与复杂性学报（英文版）

基　　金：supported by the Research Grant of BB(Brain Busan)21 Project of 2015

摘　　要：Orthogonal frequency division multiplexing(OFDM)produces a high peak-to-average power ratio(PAPR) that adversely affects high-speed OFDM data transmission. In order to reduce the high PAPR, an efficient nonlinear companding transform(NCT) function is proposed. With the proposed NCT function,the compression and expansion weights can be applied independently with suitably chosen function parameter values. As a result, the proposed function can easily maintain the average signal power approximately unchanged during the companding process.In this regard, the proposed function is superior to previously proposed schemes. Also, the simulations show the outstanding PAPR reduction performance of the proposed function. It is demonstrated that the proposed scheme performs well with nonlinear transmitter amplifiers and delivers superior error performance, compared with error function and exponential function based schemes.

关 键 词：COMPANDING orthogonal frequency division multiplex-ing （OFDM） peak-to-average power ratio （PAPR） 

分 类 号：TN929.5[电子电信—通信与信息系统] TN914.3[电子电信—信息与通信工程]