Diversity-Multiplexing Tradeoff in Half-Duplex Relay Systems

— We study the multiple antenna half-duplex relay channel from the diversity-multiplexing tradeoff (DMT) perspective. We find performance upper bounds and show that compress-and-forward (CF) protocol achieves the upper bound. We argue that although it is hard to find the exact DMT expressions for decode-and-forward (DF) type protocols, they would be suboptimal in the multiple antenna case. We also study the multiple-access relay channel (MARC), and evaluate how CF works in this system. Our results show that CF is a robust strategy, which performs well in different relay networks and multiple antenna scenarios.

• Type: Conference
• Year: 2007
• Where: ICC
• Authors: Melda Yuksel, Elza Erkip
• Keywords: Antenna Half-duplex Relay, Communications, ICC 2007, Multiple Antenna, Relay Channel