Frequency-Interleaved Spread Spectrum with MMSE Frequency-Domain Equalization(Wireless Communication Technologies)
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概要
- 論文の詳細を見る
The use of frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion can significantly improve the downlink bit error rate (BER) performances of DS- and MC-CDMA in a frequency-selective fading channel. However, the uplink BER performance degrades due to a strong multi-user interference (MUI). In this paper, we propose frequency-interleaved spread spectrum (SS) using MMSE-FDE, in which the subcarrier components of each user's signal are interleaved onto a wider bandwidth. Then, the frequency-interleaved frequency-domain signal is transformed into a time-domain signal by the inverse fast Fourier transform (IFFT). Frequency-interleaving patterns assigned to different users are orthogonal to each other. The proposed scheme can avoid the MUI completely while achieving frequency diversity gain due to MMSE-FDE. It is shown by computer simulation that the use of frequency-interleaving can significantly improve the uplink performance in a frequency-selective Rayleigh fading channel.
- 社団法人電子情報通信学会の論文
- 2007-02-01
著者
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Adachi Fumiyuki
Dept. of Electrical and Communication Engineering, Graduate School of Engineering, Tohoku University
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Adachi Fumiyuki
Dept. Of Electrical And Communication Engineering Graduate School Of Engineering Tohoku University
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Adachi Fumiyuki
Department Of Electrical And Communication Engineering Graduate School Of Engineering Tohoku Univers
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Takeda Kazuaki
Department Of Electrical And Communication Engineering Graduate School Of Engineering Tohoku Univers
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Takeda Kazuaki
Department Of Electorical Communication Engineering Graduate School Of Engineering Tohoku University
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Adachi Fumiyuki
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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Adachi Fumiyuki
Department Of Electorical Communication Engineering Graduate School Of Engineering Tohoku University
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Adachi Fumiyuki
Department Of Electrical And Communication Engineering Graduate School Of Engineering Tohoku Univers
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Adachi Fumiyuki
Tohoku University Sendai Japan
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Adachi Fumiyuki
Department Of Electrical And Communication Engineering Graduate School Of Engineering Tohoku Univers
-
Adachi Fumiyuki
Dept Of Electrical And Communications Engineering Tohoku 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 communication Engineering
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