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

In this paper a physical-layer network coded two-way 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 calcula...

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Bibliographic Details
Published in2010 IEEE Global Telecommunications Conference GLOBECOM 2010 pp. 1 - 5
Main Authors Wübben, D, Yidong Lang
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2010
Subjects
Decoding
Fading
Joints
Network coding
Parity check codes
Peer to peer computing
Relays
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Summary:In this paper a physical-layer network coded two-way 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.
ISBN:1424456363
9781424456369
ISSN:1930-529X
DOI:10.1109/GLOCOM.2010.5683819