DocumentCode :
2084157
Title :
Distributed space-time codes with relay preprocessing for low SNR source-relay links
Author :
Sirkeci-Mergen, Birsen
Author_Institution :
EE Dept., San Jose State Univ., San Jose, CA
fYear :
2008
fDate :
26-29 Oct. 2008
Firstpage :
1453
Lastpage :
1456
Abstract :
In this work, we consider a network formed by a single source-destination pair and multiple cooperating relays. For such networks, in most of the previously proposed schemes, the relays that can decode the source message correctly are allowed to retransmit. Although this is a reasonable relaying strategy in the high SNR regime, it suffers in low SNR ranges where the number of relays that can successfully decode the source message can be small. We propose to use an appropriate mapping of the noisy receptions at the relays followed by a distributed space-time code. The proposed schemes outperform the well-known amplify-and-forward and decode-and-forward strategies.
Keywords :
radiocommunication; source coding; space-time codes; SNR; distributed space-time codes; multiple cooperating relays; noisy receptions; relay preprocessing; single source-destination pair; source message; source-relay links; Decoding; Diversity methods; Physical layer; Power system relaying; Protocols; Relays; Signal to noise ratio; Space time codes; Wireless networks; Wireless sensor networks;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signals, Systems and Computers, 2008 42nd Asilomar Conference on
Conference_Location :
Pacific Grove, CA
ISSN :
1058-6393
Print_ISBN :
978-1-4244-2940-0
Electronic_ISBN :
1058-6393
Type :
conf
DOI :
10.1109/ACSSC.2008.5074661
Filename :
5074661
Link To Document :
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