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...

Full description

Saved in:
Bibliographic Details
Published in:2010 7th International Symposium on Wireless Communication Systems pp. 576 - 580
Main Author: Wubben, Dirk
Format: Conference Proceeding
Language:English
Published: IEEE 01.09.2010
Subjects:
Decoding
Fading
Joints
Network coding
Parity check codes
Phase shift keying
Relays
ISBN:9781424463152, 1424463157
ISSN:2154-0217
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISBN:9781424463152
1424463157
ISSN:2154-0217
DOI:10.1109/ISWCS.2010.5624358