A comprehensive study of repetition-coded protocols in multi-user multi-relay networks

Authors:
Chao Wang;Yijia Fan;John S. Thompson;H. Vincent Poor
Affiliations:
Institute for Digital Communications, The University of Edinburgh, Edinburgh, UK;Department of Electrical Engineering, Princeton University, Princeton, NJ;Institute for Digital Communications, The University of Edinburgh, Edinburgh, UK;Department of Electrical Engineering, Princeton University, Princeton, NJ
Venue:
IEEE Transactions on Wireless Communications
Year:
2009

Citing 21
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Abstract

The diversity-multiplexing tradeoff (DMT) performances of novel decode-and-forward (DF) relaying protocols for multi-source multi-relay cooperative networks are studied in this paper. For a strong-interference scenario and an isolated-relay scenario, the proposed protocols significantly improve diversity performance over direct source-destination transmissions by using a simple repetition coding strategy in relays. This is in addition to enhancing the multiplexing performance over standard DF protocols, which usually suffer from the half-duplex limitation at relays. Although the DMT performance of DF based relaying protocols is limited by the quality of source-relay links in principle, adaptive forms of the proposed protocols at the relays can transmit/not transmit according to source-relay transmissions and still provide link reliability and spectral efficiency advantages in general source-relay channel conditions.