Frequency-Domain ICI Cancellation with MMSE Equalization for DS-CDMA Downlink(Wireless Communication Technologies)
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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 replace the conventional rake combining while offering significantly improved bit error rate (BER) performance for the downlink DS-CDMA in a frequency-selective fading channel. However, the presence of residual inter-chip-inference (ICI) after FDE produces orthogonality distortion among the spreading codes and the BER performance degrades as the level of multiplexing increases. In this paper, we propose a joint MMSE frequency-domain equalization (FDE) and ICI cancellation to improve the BER performance of the DS-CDMA downlink. In the proposed scheme, the residual ICI replica in the frequency-domain is generated and subtracted from each frequency component of the received signal after MMSE-FDE. The MMSE weight at each iteration is derived taking into account the residual ICI. The effect of the proposed ICI cancellation scheme is confirmed by computer simulation.
- 社団法人電子情報通信学会の論文
- 2006-12-01
著者
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TAKEDA Kazuaki
Department of Electrical and Communication Engineering, Graduate School of Engineering, Tohoku Unive
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Takeda Kazuaki
Tohoku Univ. Sendai‐shi Jpn
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Adachi Fumiyuki
Department Of Electrical And Communications Engineering Graduate School Of Engineering Tohoku Univer
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ISHIHARA Koichi
NTT Corporation
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Ishihara Koichi
Dept. Of Electrical And Communication Engineering Graduate School Of Engineering Tohoku University
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Ishihara Koichi
Fluid Equipment Factory Higashimurayama Plant Nikkiso Co. Ltd.
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Ishihara Koichi
Department Of Obstetrics And Gynecology Hakuai Hospital
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Ishihara Koichi
Ntt Corp. Yokosuka‐shi Jpn
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Ishihara Koichi
Ntt Network Innovation Laboratories Ntt Corporation
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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 Electorical Communication Engineering Graduate School Of Engineering Tohoku 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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Adachi Fumiyuki
Department Of Electorical Communication Engineering Graduate School Of Engineering Tohoku University
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Ishihara Koichi
Department of Emergency Medicine, Gunma University Graduate School of Medicine
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Adachi Fumiyuki
Department of communication Engineering
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