DocumentCode :
1067283
Title :
Adaptive network coded cooperation (ANCC) for wireless relay networks: matching code-on-graph with network-on-graph
Author :
Xingkai Bao ; Jing Li
Author_Institution :
Lehigh Univ., Bethlehem
Volume :
7
Issue :
2
fYear :
2008
fDate :
2/1/2008 12:00:00 AM
Firstpage :
574
Lastpage :
583
Abstract :
We consider user cooperation in a relay network that comprises a large collection of transmitters sending wireless data to a common receiver. A new framework exploiting the network coding technology, referred to as adaptive network coded cooperation (ANCC), is proposed to combat the lossy nature of wireless links and to adapt to the changing network topology. The central idea is to match network-on-graph, i.e. instantaneous network topologies described in graphs, with the well-known class of code-on-graph, i.e. low-density parity-check (LDPC) codes and LDPC-like codes. Both achievable rates and outage probabilities are evaluated for ANCC, and closed-form expressions are derived for the asymptotic case where the network size increases without bound. Compared with the existing schemes, ANCC significantly outperforms repetition-based schemes and performs on par with space-time coded cooperation (STCC), but obviates the need for stringent inter-user synchronization at the bit/baud level.
Keywords :
adaptive codes; parity check codes; radio networks; space-time codes; telecommunication network topology; adaptive network coded cooperation; code-on-graph; low-density parity-check codes; network topology; network-on-graph; space-time coded cooperation; user cooperation; wireless links; wireless relay networks; Adaptive systems; Network coding; Network topology; Parity check codes; Protocols; Relays; Routing; Throughput; Transmitters; Wireless networks;
fLanguage :
English
Journal_Title :
Wireless Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
1536-1276
Type :
jour
DOI :
10.1109/TWC.2008.060439
Filename :
4450825
Link To Document :
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