| Summary: | 碩士 === 國立交通大學 === 電信工程研究所 === 101 === In this thesis, we consider a two-users MIMO broadcast channel (BC) without channel state information at transmitter (CSIT) whose exact DoF region is known to be achieved by setting an auxiliary random variable U as a time-sharing variable. Yet, it is possible that other setting of U could achieve the same DoF region with better outage performance. We consider the case of power-split scheme. It is first shown in this thesis that the outer bound of DoF region with power split is same as the DoF region with time-sharing. Moreover, as the error performance of any coding schemes for the MIMO BC without CSIT can be rigorously measured by the corresponding DMT performance, we then analyze the DMT performance achieved by the time-sharing scheme for the MIMO BC without CSIT. For the power split scheme, two decoding methods are considered, namely, the individual ML decoder and the successive interference cancellation (SIC) decoder. We find that in many cases the DMT resulting from SIC decoder for power split scheme is much better than from the time-sharing scheme.
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