Generalized Sum-Product Algorithm for Joint Channel Decoding and Physical-Layer Network Coding in Two-Way Relay Systems

Authors: D. Wübben, Y. Lang
Abstract: In this paper a physical-layer network coded twoway relay system applying Low-Density Parity-Check (LDPC) codes for error correction is considered, where two sources A and B desire to exchange information with each other by the help of a relay R. The critical process in such a system is the calculation of the network-coded transmit word at the relay on basis of the superimposed channel-coded words of the two sources. For this joint channel-decoding and network-encoding task a generalized Sum-Product Algorithm (SPA) is developed. This novel iterative decoding approach outperforms other recently proposed schemes as demonstrated by simulation results.
Document type: Conference Paper
Publication: Miami, FL, USA, 6. - 10. December 2010
Conference: IEEE 2010 Global Telecommunications Conference (Globecom 2010)
Files:
Globecom 2010 Wuebben
Globecom_2010_Wuebben.pdf164 KB
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Last change on 20.03.2012 by D. Wübben
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