Repeat-Accumulate Codes for Broadcast Channels with Side Information

Conference: SCC 2015 - 10th International ITG Conference on Systems, Communications and Coding
02/02/2015 - 02/05/2015 at Hamburg, Germany

Proceedings: ITG-Fb 254: 10th International ITG Conference on Systems, Communications and Coding (SCC 2015)

Pages: 5Language: englishTyp: PDF

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Authors:
Iscan, Onurcan (Institute for Communications Engineering, Technische Universität München, Munich, Germany)
Land, Ingmar; Lechner, Gottfried (Institute for Telecommunications Research, University of South Australia, Adelaide, Australia)

Abstract:
This paper investigates the performance of practical codes for the problem of Slepian-Wolf coding over broadcast channels, where a message is transmitted to multiple users with different amounts of side information available at each receiver. Density evolution analysis for repeat-accumulate codes on erasure channels is extended to this setup, where the side information is modeled as the output of a virtual correlation channel. Analytic expressions to describe the convergence region for erasure channels are obtained and it is shown by numerical tools that similar results also apply for AWGN channels.