Joint Frequency-Domain Equalization and Despreading for Multi-Code DS-CDMA Using Cyclic Delay Transmit Diversity
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概要
- 論文の詳細を見る
Frequency-domain equalization (FDE) based on the minimum mean square error (MMSE) criterion can provide a better bit error rate (BER) performance than rake combining. To further improve the BER performance, cyclic delay transmit diversity (CDTD) can be used. CDTD simultaneously transmits the same signal from different antennas after adding different cyclic delays to increase the number of equivalent propagation paths. Although a joint use of CDTD and MMSE-FDE for direct sequence code division multiple access (DS-CDMA) achieves larger frequency diversity gain, the BER performance improvement is limited by the residual inter-chip interference (ICI) after FDE. In this paper, we propose joint FDE and despreading for DS-CDMA using CDTD. Equalization and despreading are simultaneously performed in the frequency-domain to suppress the residual ICI after FDE. A theoretical conditional BER analysis is presented for the given channel condition. The BER analysis is confirmed by computer simulation.
- （社）電子情報通信学会の論文
- 2009-05-01
著者
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YAMAMOTO Tetsuya
Department of Neurosurgery, Graduate School of Comprehensive Human Sciences, University of Tsukuba
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Takeda Kazuaki
Tohoku Univ. Sendai‐shi Jpn
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Takeda Kazuki
Department Of Chemistry Graduate School Of Science Kyoto University
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Adachi Fumiyuki
Department Of Electrical And Communications Engineering Graduate School Of Engineering Tohoku Univer
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Adachi Fumiyuki
Department Of Electrical And Communication Engineering Graduate School Of Engineering Tohoku Univers
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Adachi Fumiyuki
Dept. Of Electrical And Communications Engineering Graduated School Of Engineering Tohoku University
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Yamamoto Tetsuya
Department Of Chemical Engineering Graduate School Of Engineering Hiroshima University
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Takeda Kazuki
Department Of Electrical And Communication Engineering Graduate School Of Engineering Tohoku Univers
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Adachi Fumiyuki
Department Of Electrical And Communication Engineering Graduate School Of Engineering Tohoku Univers
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Yamamoto Tetsuya
Department Of Electrical And Communication Engineering Graduate School Of Engineering Tohoku Univers
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Yamamoto Tetsuya
Department Of Astronomy School Of Science The University Of Tokyo
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Adachi Fumiyuki
Department Of Electorical Communication Engineering Graduate School Of Engineering Tohoku University
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ADACHI Fumiyuki
Department of Communications Engineering, Graduate School of Engineering, Tohoku University
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Adachi Fumiyuki
Department of communication Engineering
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