DocumentCode :
3221545
Title :
Performance of turbo product codes on the multiple-access relay channel with relatively poor source-relay links
Author :
Yin, Yizhi ; Pyndiah, Ramesh ; Amis, Karine
Author_Institution :
Lab.-STICC, Univ. Eur. de Bretagne, Tours, France
fYear :
2012
fDate :
17-20 June 2012
Firstpage :
419
Lastpage :
423
Abstract :
In this paper, we study a cooperative coding scheme based on turbo product codes where a number of sensors transmit to a same destination with the help of a relay. This network can be modeled by a multiple-access relay channel (MARC). In the proposed scheme, the relay applies algebraic systematic Network Coding to the source codewords and forwards only the additional redundancy to the destination where an overall product codeword is observed. Based on the single-relay scenario that has been studied in a previous paper, we analyze the error probabilities at the relay input and output for different relay strategies. Taking into account the residual errors at the relay, an appropriate log-likelihood ratio is used at the destination by the turbo decoder. The error performance under the degraded source-relay channel condition is shown on the Rayleigh fading channel. Besides that, we analyze the error correlation in the relay-generated redundancy and investigate the benefits of using multi-relay cooperation. Different cooperation schemes are compared in terms of performance, complexity and energy consumption.
Keywords :
Rayleigh channels; algebraic codes; cooperative communication; network coding; probability; product codes; radio links; turbo codes; MARC; Rayleigh fading channel; algebraic systematic network coding; cooperative coding scheme; energy consumption; error probability; log-likelihood ratio; multiple-access relay channel; multirelay cooperation; relatively poor source-relay links; relay-generated redundancy; sensors; turbo product code performance; Bit error rate; Decoding; Encoding; Product codes; Redundancy; Relays; Sensors; Rayleigh channel; Turbo product codes; cooperative communications; network coding; sensor network;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing Advances in Wireless Communications (SPAWC), 2012 IEEE 13th International Workshop on
Conference_Location :
Cesme
ISSN :
1948-3244
Print_ISBN :
978-1-4673-0970-7
Type :
conf
DOI :
10.1109/SPAWC.2012.6292941
Filename :
6292941
Link To Document :
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