DocumentCode :
383849
Title :
Optimized irregular Gallager codes for OFDM transmission
Author :
Mannoni, V. ; Declereq, D. ; Gelle, G.
Author_Institution :
ETIS, ENSEA/UCP/CNRS, Cergy-Pontoise, France
Volume :
1
fYear :
2002
fDate :
15-18 Sept. 2002
Firstpage :
222
Abstract :
We present an optimized channel coding scheme for OFDM transmitter. Traditional coding methods use regular codes, in the sense that each bit participates in the same way to the channel encoding. Our approach consists in using a priory assumption on the channel available at the transmitter in order to optimize the coding scheme. We have considered the irregular Gallager block codes in our study. Simulations provide evidence of the usefulness of our approach with a gain of 2 dB at a bit error rate equal to 10-5 for optimized irregular coding scheme compared to regular one.
Keywords :
AWGN channels; block codes; channel coding; error statistics; genetic algorithms; iterative decoding; parity check codes; radio transmitters; AWGN channels; BER; LDPC codes; OFDM transmission; OFDM transmitter; bit error rate; differential evolution; frequency selective channels; genetic algorithm; irregular Gallager block codes; irregular low-density parity-check codes; iterative decoding; optimized channel coding; optimized irregular Gallager codes; orthogonal frequency division multiplexing; simulations; AWGN channels; Block codes; Channel coding; Dispersion; Frequency domain analysis; Gaussian approximation; Helium; OFDM modulation; Parity check codes; Transmitters;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on
Print_ISBN :
0-7803-7589-0
Type :
conf
DOI :
10.1109/PIMRC.2002.1046693
Filename :
1046693
Link To Document :
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