On the Diversity-Multiplexing Tradeoff of the Half-Duplex DDF MIMO Relay Protocol

Eunchul YOON  Sun-Yong KIM  Suhan CHOI  

IEICE TRANSACTIONS on Communications   Vol.E95-B   No.2   pp.540-550
Publication Date: 2012/02/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.540
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
diversity multiplexing tradeoff (DMT),  dynamic decode and forward (DDF),  cooperative diversity,  MIMO,  

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The analytical derivation of the diversity-multiplexing tradeoff (DMT) for a half-duplex dynamic decode and forward (DDF) MIMO relay protocol has been regarded as an open problem. Recently, however, a minimization problem setting has been found, the solution of which corresponds to the DMT function for a half-duplex DDF MIMO relay protocol. In this paper, the DMT functions for three special half-duplex DDF MIMO relay protocols using two antennas at two of three nodes, source, relay, and destination nodes, and a single antenna at the other node are derived first. Then, the DMT function for a special half-duplex DDF MIMO relay protocol using two antennas at every node is derived. These DDF MIMO relay protocols are compared with one another and with some NAF MIMO relay protocols by simulation.