Frequency-Domain Multi-Stage Soft Interference Cancellation for DS-CDMA Uplink Signal Transmission(Wireless Communication Technologies)
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概要
- 論文の詳細を見る
It is well-known that, in DS-CDMA downlink signal transmission, frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion can replace rake combining to achieve much improved bit error rate (BER) performance in severe frequency-selective fading channel. However, in uplink signal transmission, as each user's signal goes through a different channel, a severe multi-user interference (MUI) is produced and the uplink BER performance severely degrades compared to the downlink. When a small spreading factor is used, the uplink BER performance further degrades due to inter-chip interference (ICI). In this paper, we propose a frequency-domain multi-stage soft interference cancellation scheme for the DS-CDMA uplink and the achievable BER performance is evaluated by computer simulation. The BER performance comparison of the proposed cancellation technique and the multiuser detection (MUD) is also presented.
- 社団法人電子情報通信学会の論文
- 2007-05-01
著者
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Takeda Kazuaki
Tohoku Univ. Sendai‐shi Jpn
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TAKEDA Kazuaki
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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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
Ntt Corp. Yokosuka‐shi Jpn
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Ishihara Koichi
Ntt Network Innovation Laboratories Ntt Corporation
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Adachi Fumiyuki
Dept. Of Electrical And Commu. Eng. Graduate School Of Eng. Tohoku University
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Takeda Kazuaki
Dept. Of Electrical And 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
Dept. Electrical And Communication Engineering Graduate School Of Engineering Tohoku University
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Adachi Fumiyuki
Dept. Electrical And Communication Engineering Graduate School Of Engineering
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