Comparison of decoding algorithms for concatenated turbo codes

Authors:
Drago Žagar;Nenad Falamic;Snježana Rimac-Drlje
Affiliations:
University of Osijek, Faculty of Electrical Engineering, Osijek, Croatia;University of Osijek, Faculty of Electrical Engineering, Osijek, Croatia;University of Osijek, Faculty of Electrical Engineering, Osijek, Croatia
Venue:
EHAC'05 Proceedings of the 4th WSEAS International Conference on Electronics, Hardware, Wireless and Optical Communications
Year:
2005

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Abstract

This paper deals with a comparison of decoding algorithms for concatenated turbo codes. For this purpose we have implemented an algorithm of the concatenated convolutional turbo code in Matlab© program. The algorithms used for decoding of turbo codes were Log-MAP and SOVA. To perform measurements we have simulated different communications conditions in the implemented model. We have evaluated the impact of the Signal/Noise ratio and the frame length on bit error rate (BER) for different decoders and finally compared the analysed decoding methods with theoretical limits.