Distributed Transmit Diversity in Relay Networks

Abstract— We analyze fading relay networks, where a singleantenna source-destination terminal pair communicates through a set of half-duplex single-antenna relays using a two-hop protocol with linear processing at the relay level. A family of relaying schemes is presented which achieves the entire optimal diversitymultiplexing (DM) tradeoff curve. As a byproduct of our analysis, it follows that delay diversity and phase-rolling at the relay level are optimal with respect to the entire DM-tradeoff curve, provided the delays and the modulation frequencies, respectively, are chosen appropriately.

• Type: Journal
• Year: 2007
• Where: CORR
• Authors: Cemal Akçaba, Patrick Kuppinger, Helmut Bölcskei
• Keywords: CORR 2007, Education, Half-duplex Single-antenna Relays, Relay, Relay Level