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A geometric approach for turbo decoding of reed-solomon codes in QAM modulation schemes

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2 Author(s)
Runge, C.J.R. ; Dept. de Eng. de Telecomun. e Controle, Univ. de Sao Paulo, Sao Paulo ; Piqueira, J.R.C.

This work studies the turbo decoding of Reed-Solomon codes in QAM modulation schemes for additive white Gaussian noise channels (AWGN) by using a geometric approach. Considering the relations between the Galois field elements of the Reed-Solomon code and the symbols combined with their geometric dispositions in the QAM constellation, a turbo decoding algorithm, based on the work of Chase and Pyndiah, is developed. Simulation results show that the performance achieved is similar to the one obtained with the pragmatic approach with binary decomposition and analysis.

Published in:

Communications Letters, IEEE  (Volume:13 ,  Issue: 5 )