碩士 / 國立交通大學 / 電信工程研究所 / 105 / In next ten years, existing communication standards obviously cannot meet with the needs of future 5G mobile communications. In response to this, we research on one of the possible techniques in 5G cellular system, which is a TDD massive antenna multipath division multiple access (MDMA) system. In this thesis, channel estimation for massive antenna MDMA mobile radio communication system based on different pilot sequences are investigated. We explored Orthogonal Frequency-Division Multiplexing (OFDM) and adopt maximum ratio combining in uplink (UL). We use different pilot sequences combined with data sequence as our transmitted signal in UL and estimate channels at base station (BS). With parallel interference cancellation (PIC) method, bit error rate (BER) can be improved further. We also utilize the method of combining user data and pilot sequence together to estimate channels. Besides, we do circular shift on Zadoff-Chu sequences and find that it has better performance than traditional Zadoff-Chu sequence. Finally, for the OFDM system, we use different pilot sequences to analyze the number of users which can be served by the MDMA system.
| Identifer | oai:union.ndltd.org:TW/105NCTU5435084 |
| Date | January 2017 |
| Creators | Tsai, Yun-Ting, 蔡昀廷 |
| Contributors | Huang, Chia-Chi, 黃家齊 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 64 |
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