Clipping effects on channel estimation and signal detection in OFDM

Author

Wu, Biiigyang ; Cheng, Shixin ; Wang, Haifeng

Author_Institution

Nat. Mobile Commun. Res. Lab., Southeast Univ., Nanjing, China

Volume

1

fYear

2003

fDate

7-10 Sept. 2003

Firstpage

531

Abstract

Clipping is a popular and simple method to overcome large peak to mean envelope power ratio (PMEPR) in OKDM system, but it results in a nonlinear distortion, which degrade the performance of channel estimation and signal detection. In this paper we estimated OFDM channel using a simple LS method based on a scheme that only part of the OFDM tones arc used for pilot, in which the clipping distortion is unknown for the receiver, and then we analyze the clipping effects on channel estimation. According to the estimated channel, we detected the OFDM signal and analyze the clipping effects on signal detection. We derived the BER solution of clipping OFDM in Rayleigh fading channel and the numerical solution is very close to simulation results.

Keywords

OFDM modulation; Rayleigh channels; channel estimation; error statistics; least squares approximations; signal detection; BER solution; LS method; OFDM; Rayleigh fading channel; channel estimation; clipping distortion; clipping effects; nonlinear distortion; peak to mean envelope power ratio; signal detection; Bit error rate; Channel estimation; Degradation; Fading; Mobile communication; Nonlinear distortion; OFDM; Signal analysis; Signal detection; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003. 14th IEEE Proceedings on

Print_ISBN

0-7803-7822-9

Type

conf

DOI

10.1109/PIMRC.2003.1264328

Filename

1264328