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The authors study the Diversity-Multiplexing Tradeoff (DMT) for the full-duplex relay channel when the source and the destination have multiple antennas, and the relay has 1 or more. They find DMT upper bounds and investigate the achievable performance of Decode-and-Forward (DF), Partial Decode-and-Forward (PDF), and Compress-and-Forward (CF) protocols. They study the effect of increased degrees of freedom in the direct link and the source-relay channel when multiple antennas are introduced. Their results suggest that while DF is DMT optimal when all terminals have one antenna each, it cannot maintain its good performance when the degrees of freedom in the direct link is increased.
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