Tuesday 20th of February 2018

Exit Chart for Iterative Decoding of Product and Concatenated Block Codes

Abderrazak Farchane, Mostafa Belkasmi and Ahmed Azouaoui

In this paper, we study the convergence behaviour of a new SISO decoder that we have proposed recently in [1]. The exchange of extrinsic information is used to trace the decoding trajectory in the extrinsic information transfer Chart. That allows foreseeing the turbo cliff position. The influence of concatenated scheme as well as different constituent codes on the convergence behaviour is investigated for product and generalized serially and parallel concatenated codes. Simulation result shows that the thresholds obtained by EXIT chart and BER curves are almost the same.

Keywords: EXIT chart, SISO decoder, iterative decoding, product codes, BCH codes, GSCB codes, GPCB codes.

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Abderrazak Farchane
received his license in Computer Science and Engineering in June-2001 and Master in Computer Science and telecommunication from University of Mohammed V - Agdal, Rabat, Morocco in 2003. Currently he is doing his PhD in Computer Science and Engineering at ENSIAS (Ecole Nationale Supérieure d\'Informatique et d\'Analyse des Systèmes), Rabat, Morocco. His areas of interest are Information and Coding Theory.

Mostafa Belkasmi
University Mohamed V SOUISSI, ENSIAS

Ahmed Azouaoui
University Mohamed V SOUISSI, ENSIAS

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