Transmit Signal and Bandwidth Optimization in Multiple-Antenna Relay Channels

Details Transmit Signal and Bandwidth Optimization in Multiple-Antenna Relay Channels Transmit Signal and Bandwidth Optimization in Multiple-Antenna Relay Channels

2010-01-18

arxiv.org/abs/1001.2938v1

IEEE Transactions on Communications, vol. 59, no. 11, pp. 2987-2992, Nov. 2011

Computer Science

Information Theory

16 pages, 10 figures

Scientific paper

10.1109/TCOMM.2011.063011.100030

Transmit signal and bandwidth optimization is considered in multiple-antenna relay channels. Assuming all terminals have channel state information, the cut-set capacity upper bound and decode-and-forward rate under full-duplex relaying are evaluated by formulating them as convex optimization problems. For half-duplex relays, bandwidth allocation and transmit signals are optimized jointly. Moreover, achievable rates based on the compress-and-forward transmission strategy are presented using rate-distortion and Wyner-Ziv compression schemes. It is observed that when the relay is close to the source, decode-and-forward is almost optimal, whereas compress-and-forward achieves good performance when the relay is close to the destination.

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