Bandwidth-efficient cooperative MIMO relaying schemes

Authors:
Ho Van Khuong;Tho Le-Ngoc
Affiliations:
Department of Electrical and Computer Engineering, McGill University, 3480 University Street, Montreal, QC, Canada H3A 2A7;Department of Electrical and Computer Engineering, McGill University, 3480 University Street, Montreal, QC, Canada H3A 2A7
Venue:
Computers and Electrical Engineering
Year:
2010

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Abstract

Coded cooperative MIMO relaying schemes in which all successfully decoded signals from multiple sources are simultaneously forwarded by a multi-antenna relay to a common multi-antenna destination to increase bandwidth efficiency are proposed in this paper. These schemes facilitate the various retransmission strategies at relay and single-user and multi-user iterative decoding techniques at destination, suitable for trade-offs between performance, latency, and complexity. When channel state information (CSI) is available, pre-coding and power allocation at the relay can be exploited to enhance the information transmission reliability over the relay-destination channel, thus improving the overall system performance. Simulation result shows their superiority to direct transmission under the same transmit power and bandwidth efficiency.