Joint channel decoding and physical-layer network coding in two-way QPSK relay systems by a generalized Sum-Product Algorithm

A physical-layer network coded two-way relay system applying Low-Density Parity-Check (LDPC) codes for error correction is considered in this paper, 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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Vydáno v:2010 7th International Symposium on Wireless Communication Systems s. 576 - 580
Hlavní autor: Wubben, Dirk
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: IEEE 01.09.2010
Témata:
Decoding
Fading
Joints
Network coding
Parity check codes
Phase shift keying
Relays
ISBN:9781424463152, 1424463157
ISSN:2154-0217
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Abstract A physical-layer network coded two-way relay system applying Low-Density Parity-Check (LDPC) codes for error correction is considered in this paper, 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 QPSK words of the two sources. For this joint channel-decoding and network-encoding task a generalized Sum-Product Algorithm (SPA) over F 16 is developed. This novel iterative decoding approach outperforms other recently proposed schemes as demonstrated by simulations.
AbstractList A physical-layer network coded two-way relay system applying Low-Density Parity-Check (LDPC) codes for error correction is considered in this paper, 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 QPSK words of the two sources. For this joint channel-decoding and network-encoding task a generalized Sum-Product Algorithm (SPA) over F 16 is developed. This novel iterative decoding approach outperforms other recently proposed schemes as demonstrated by simulations.
Author Wubben, Dirk
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  email: wuebben@ant.uni-bremen.de
  organization: Dept. of Commun. Eng., Univ. of Bremen, Bremen, Germany
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Snippet A physical-layer network coded two-way relay system applying Low-Density Parity-Check (LDPC) codes for error correction is considered in this paper, where two...
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StartPage 576
SubjectTerms Decoding
Fading
Joints
Network coding
Parity check codes
Phase shift keying
Relays
Title Joint channel decoding and physical-layer network coding in two-way QPSK relay systems by a generalized Sum-Product Algorithm
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