Cooperative diversity for wireless ad hoc networks
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Cooperative diversity is a novel technique to convey information in wireless ad hoc networks where closely located single-antenna network nodes cooperatively transmit and/or receive by forming virtual antenna arrays. It naturally arises in ad hoc networks as it enables great power savings with cheap, simple and mobile nodes while supporting decentralized routing and control algorithms. Cooperative diversity is largely based on relaying messages. The relay channel is a three-node channel where the source communicates to the destination with the help of an intermediate relay node. In receiver cooperation, two single-antenna receivers cooperate to facilitate decoding messages from two remote single-antenna transmitters. In transmitter cooperation, two single-antenna transmitters collaborate in communicating to two remote single-antenna receivers. Cooperative diversity does offer high additive rate gains when compared to the noncooperation case and the key in achieving these gains lies in coding with side information.
author list (cited authors)
Stankovic, V., Host-Madsen, A., & Xiong, Z.