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Advanced decoding algorithms for Reed-Solomon/Convolutional concatenated codes
Authors:Meritxell Lamarca  Josep Sala  Alfonso Martinez
Affiliation:1. Dept. of Signal Theory and Communications, Universitat Politècnica de Catalunya, upc Campus Nord-Mòdul D5, c/Jordi Girona, 1-3, 08034, Barcelona, Spain
2. Dept. Electrical Engineering, Signal Processing Group (SPS), Technische Universiteit Eindhoven; Dept. Electrical Engineering — Signal Processing Group (SPS), Den Dolen 2, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
Abstract:The evaluation of the union bound for theber of Reed-Solomon/Convolutional concatenated codes indicates that their performance might largely improve through the application of soft iterative decoders. This paper presents an iterative decoding algorithm for concatenated codes consisting of an outer Reed-Solomon code, a symbol interleaver and an inner convolutional code. The performance improvement for iterative and non-iterative decoders is evaluated. Existing solutions for the different decoding stages and their interfaces are discussed and their performance is compared. A new procedure is proposed to define the feedback signal from the output of the Reed-Solomon decoder to the input of the convolutional decoder, which captures the reliability information that can be inferred from errors-and-era-suresrs decoders and includes the “state pinning” approach as a particular case. The decoding schemes are applied to the specificdvb-s concatenated code.
Keywords:
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