EURASIP Journal on Advances in Signal Processing 
Volume 2008 (2008), Article ID 683105, 11 pages
doi:10.1155/2008/683105
Research Article

Bandwidth-Efficient Cooperative Relaying Schemes with Multiantenna Relay

Khuong Ho-Van and Tho Le-Ngoc

 Department of Electrical and Computer Engineering, McGill University, Montreal, QC, H3A 2A7, Canada
Received 1 November 2007; Revised 12 February 2008; Accepted 17 March 2008

Recommended by Hyundong Shin

Abstract

We propose coded cooperative relaying schemes in which all successfully decoded signals from multiple sources are forwarded simultaneously by a multiantenna relay to a common multiantenna destination to increase bandwidth efficiency. These schemes facilitate various retransmission strategies at relay and single-user and multiuser iterative decoding techniques at destination, suitable for trade-offs between performance, latency, and complexity. Simulation results show that the proposed schemes significantly outperform direct transmission under the same transmit power and bandwidth efficiency.