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2007
IEEE

Relay Selection for Low-Complexity Coded Cooperation

9 years 23 days ago
Relay Selection for Low-Complexity Coded Cooperation
— This paper explores relay selection and selection diversity for coded cooperation in wireless sensor networks, with complexity constraints for the sensor nodes. In previous work, a relaying scheme based on repeat-accumulate (RA) codes was introduced, where the relay is assumed incapable of decoding the received signal’s error-correcting code, and simply uses demodulated bits to form codewords. However, in a network setting with multiple potential relays where relays do not decode the source transmission, it is not obvious how to select the best relay. The optimal choice involves the source-relay, relay-destination, and source-destination channels. In this paper, optimal relay selection is discussed, and is shown to be impractical for low-complexity sensor nodes. However, it is shown that the mutual information of the equivalent relay channel is a good selection heuristic. The importance of a good relay selection scheme is emphasized with the surprisingly poor performance when a n...
Josephine P. K. Chu, Raviraj S. Adve, Andrew W. Ec
Added 02 Jun 2010
Updated 02 Jun 2010
Type Conference
Year 2007
Where GLOBECOM
Authors Josephine P. K. Chu, Raviraj S. Adve, Andrew W. Eckford
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