| Summary: | 碩士 === 國立交通大學 === 電信工程研究所 === 105 === In this thesis, we studied and investigated the synchronization procedure for universal filtered multi-carrier (UFMC) in our proposed 5G massive antenna multipath division multiple access (MDMA) cellular system of downlink transmission. In our system, we consider multicarrier modulation to transmitted traffic data. One of the multicarrier scheme is OFDM, which has the problem of high out-of-band power. UFMC is a novel multicarrier transmission scheme, and it can suppress out-of-band power effectively as compared to OFDM system. In addition, multicarrier schemes are sensitive to time-frequency synchronization. In uplink transmission, pilot sequence can be used for synchronization. However, in downlink transmission, there is no pilot sequence and blind synchronization is need. In CP-OFDM system, CP can be used to execute the coarse synchronization. For UFMC, we proposed the coarse synchronization method which does not require the CP. Also, a fine symbol timing estimation method is proposed to obtain accurate time synchronization to demodulate signal correctly.
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