Peak-factor reduction in OFDM by Reed-Muller channel coding a new soft decision decoding algorithm

Author

Louët, Yves ; Le Glaunec, Annick

Author_Institution

Dept. of Electron., High Eng. Inst., Cesson-Sevigne, France

Volume

2

fYear

2000

fDate

2000

Firstpage

872

Abstract

This paper presents a soft decision decoding based on Chase´s (1972) algorithm applied to Reed-Muller codes for peak-to-MEan Power Ratio (PMEPR) reduction and error correction. This scheme is applied to the OFDM (Orthogonal Frequency Division Multiplexing) modulated signal to reduce its PMEPR and to have correction capacities. We first obtain a 2 dB coding gain at BER=10^-4 between hard and soft decoding and about 4 dB between the soft decoding and the uncoded system. Next, by modeling nonlinear TWTA power amplifiers with AM/AM and AM/PM distortions, we obtain similar results and note improving BER performance compared to BCH codes with the same parameters.

Keywords

OFDM modulation; Reed-Muller codes; amplitude modulation; channel coding; decoding; error statistics; nonlinear distortion; phase modulation; power amplifiers; travelling wave amplifiers; AM/AM distortion; AM/PM distortion; BCH codes; BER; BER performance; Chase´s algorithm; OFDM modulated signal; Reed-Muller channel coding; Reed-Muller codes; coding gain; hard decoding; nonlinear TWTA power amplifier modeling; nonlinear distortion; orthogonal frequency division multiplexing; peak-factor reduction; peak-to-mean power ratio; soft decision decoding algorithm; soft decoding; uncoded system; Bit error rate; Channel coding; Decoding; Error correction codes; Frequency modulation; Gain; Nonlinear distortion; OFDM modulation; Power amplifiers; Power system modeling;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrotechnical Conference, 2000. MELECON 2000. 10th Mediterranean

Print_ISBN

0-7803-6290-X

Type

conf

DOI

10.1109/MELCON.2000.880072

Filename

880072