A Hybrid Technique Based on RS Coding and Least Square Method for Clipping Distortion Mitigation in OFDM System

Author

Tang, Jun ; Jin, Xinyu ; Zhang, Xianmin ; Cai, Wenyu

Author_Institution

Dept. of Inf. Sci. & Electron. Eng., Zhejiang Univ., Hangzhou

fYear

2006

fDate

22-24 Sept. 2006

Firstpage

1

Lastpage

4

Abstract

Orthogonal frequency division multiplexing (OFDM) signal has a large peak-to-average power ratio (PAPR). Hence, several techniques have been proposed to reduce the PAPR. Clipping is a widely used technique to reduce the peak amplitudes by nonlinearly distorting the OFDM signal at or around the peaks. However, clipping results in symbol distortion because of the nonlinearly operation to the signal peak value. Recently, a DFT-based method for OFDM system to compensate for the performance degradation has been proposed. In this paper, we investigate the hybrid method which consists of RS coding and least square method. Through computer simulation, our results show that the hybrid method is an effective technique to mitigate the clipping distortion

Keywords

OFDM modulation; Reed-Solomon codes; discrete Fourier transforms; least squares approximations; modulation coding; nonlinear distortion; DFT-based method; OFDM system; RS coding; distortion mitigation clipping; hybrid technique; least square method; nonlinear distortion; orthogonal frequency division multiplexing; peak-to-average power ratio; performance degradation; Additive white noise; Degradation; Distortion; Fading; Information science; Least squares methods; OFDM; Peak to average power ratio; Performance analysis; Quadrature amplitude modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Mobile Computing, 2006. WiCOM 2006.International Conference on

Conference_Location

Wuhan

Print_ISBN

1-4244-0517-3

Type

conf

DOI

10.1109/WiCOM.2006.73

Filename

4149250