| Summary: | 碩士 === 國立交通大學 === 電信工程研究所 === 106 === Through the advance of communication technology, the time of 5G mobile communication is arrived. A possible technique for 5G cellular system is called the TDD massive antenna multipath division multiple access (MDMA) system. In this thesis, we simulate this system under different cellular structures, and evaluate the capacity of uplink(UL) and downlink(DL) systems. In uplink, base station(BS) uses pilot signals sent by mobile stations (MS) to estimate channel and use Parallel-Interference-Cancellation(PIC) and Kalman filter to suppress interference. At last, we use Maximal-Ratio Combining(MRC) to recover the data from each mobile station. In downlink, base station utilizes uplink channel estimation to do Pre-RAKE on data and send it to mobile station. Through simulation, we found that system capacity can be greatly enhanced and lower complexity in uplink and downlink by implementing selected 60 degree sector edge excited zone cellular structure. In practical consideration, we can lower system complexity in uplink and greatly enhance system capacity compare to selected 60 degree sector edge excited zone cellular structure in downlink by implementing selected omni zone cellular structure with 1/4 cell split.
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