| Summary: | 碩士 === 國立交通大學 === 電信工程研究所 === 104 === Consider a cooperative network consisting of a source node, a destination node and some relay nodes, each having multiple antennas and employing a dynamic decode-and-forward (DDF) communication protocol. The existing DDF protocol suffers from an infinitely long delay and is completely impractical, and the diversity performance for MIMO relay network with multiple relays remains unknown to this date. In this thesis, we first investigate the performance of a finite-delay DDF protocol operating on MIMO relay channel with single relay using the diversity-multiplexing gain tradeoff (DMT) as a performance measure. It is seen that the finite-delay DDF can have a reasonably good DMT performance even in case of a short delay. Next, we focus on the DMT of the DDF protocol for two relays with multiple antennas and compare it with the single relay case having the same overall amount of antennas. It is surprisingly seen that for mostly channel configurations described above, the two settings can result in different diversity performance. It is also found in this thesis that the distribution of antennas between two relays affects the overall DMT performance.
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