| Summary: | 碩士 === 國立交通大學 === 電信工程研究所 === 108 === With the development of the wireless communication technology, the fifth generation(5G) mobile communication standards will be formally released by 2020 and applied to commerce. People from all walks of life dedicate to developing 5G communication system to meet the higher demand of transmission, and space division multiple access (SDMA) is regarded as a key technology. In response to 5G communication system, our lab researches on a possible technique known as the massive antenna multipath division multiple access (MDMA) cellular system. In this thesis, we compare with the performance of two above-mentioned systems under multicellular. For SDMA system, Base station (BS) utilizes directional antennas to effect adaptive beamforming and communicate with mobile station (MS). In uplink (UL), BS uses pilot signals sent by MS to estimate propagation channel and uses minimum mean square error equalizer to recover the user data. In downlink (DL), BS uses channel state information (CSI) estimated in uplink to do pre-equalization. Finally, we simulate UL and DL of MDMA system and SDMA system respectively. Simulation results are given and discussed on the performance of these two systems.
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