Frequency Offset Compensation with MMSE-MUD for Multi-Carrier CDMA in Quasi-Synchronous Uplink(Wireless Communication Technology)
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概要
- 論文の詳細を見る
Multi-Carrier Code Division Multiple Access (MC-CDMA) is one of candidates for the next generation wireless communication systems. In an uplink, the MC-CDMA system suffers from the different access timing (asynchronous transmission), the different fading, and the different frequency offsets of each active user. In this paper we analyze the effects of the frequency offset compensation with MMSE-MUD (minimum mean square error based multi-user detection) for MC-CDMA in a quasi-synchronous uplink. We consider the MC-CDMA system with two subcarrier mapping schemes, the continuous mapping scheme and the discrete mapping scheme. From our theoretical analysis and computer simulation, we show that the MMSE-MUD can compensate the different frequency offsets among users. We also show that the MMSE-MUD significantly improves the bit error rate (BER) for the MC-CDMA system with the continuous mapping scheme.
- 社団法人電子情報通信学会の論文
- 2004-06-01
著者
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NAKAGAWA Masao
Department of Information and Computer Science, Keio University
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OHTSUKI Tomoaki
Department of Information and Computor Science, Keio University
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Ohtsuki T
Faculty Of Science And Technology Keio University
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TAKYU Osamu
Department of Information and Computer Science, Keio University
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NAKAGAWA Masao
Faculty of Science and Technology, Keio University
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Takyu Osamu
Tokyo Univ. Sci. Noda‐shi Jpn
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Takyu Osamu
Faculty Of Science And Technology Keio University
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Takyu Osamu
Department Of Electrical Engineering Tokyo University Of Science
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Ohtsuki Tomoaki
Department Of Computer And Information Science Keio University
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Nakagawa Masao
Faculty Of Science And Technology Keio University
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Nakagawa Masao
Department Of Information And Computer Science Faculty Of Science And Technology Keio University
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Nakagawa Masao
Department Of Gastroenterology And Hematology Hokkaido University Graduate School Of Medicine
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Ohtsuki Tomoaki
Department Of Computer And Information Keio University
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Nakagawa Masao
Department Of Elect.engineering Keis University
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