Interference Rejection Weight Control for Pilot Symbol-Assisted Coherent Multistage Interference Canceller Using Recursive Channel Estimation in DS-CDMA Mobile Radio
スポンサーリンク
概要
- 論文の詳細を見る
To further increase the capacity of the DS-CDMA reverse-link, this paper investigates the effectiveness of interference rejection weight control(IRWC) for the pilot symbol-assisted coherent multistage interference canceller(PSA-COMSIC)using recursive channel estimation(RCE). First, a bit error rate(BER)expression of the serial(successive)and parallel type hard decision multistage interference canceller(MSIC)with IRWC using Gaussian approximation for multiple access interference(MAI)are presented for no fading channels. It is theoretically shown that IRWC is effective in mitigating the interference replica generation error in hard decision MSIC. Next, the BER performance of PSA-COMSIC using IRWC in a multipath Rayleigh fading channel when channel coding is applied is evaluated by computer simulations. The BER performance and capacity are evaluated not only for the conventionl serial and parallel types but also for serial/parallel(S/P)hybrid type and non-linear/linear(N/L)hybrid type schemes, both of which are effective is significantly reducing the demodulation processing delay. The simulation results demonstrate that, in interference-limited channels where the back ground noise is negligible, the capacity of serial type PSA-COMSIC using IRWC is about 10% higher than that without IRWC. It is also found that if we can accept a slight capacity degradation compared to the serial type PSA-COMSIC, S/P hybrid schemes are effective in reducing the demodulation processeing delay.
- 社団法人電子情報通信学会の論文
- 1998-05-25
著者
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HIGUCHI Kenichi
Department of Electrical Engineering, Tokyo University of Science
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SAWAHASHI Mamoru
R&D Department, NTT Mobile Communications Network, Inc.
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Higuchi K
Department Of Electrical Engineering Tokyo University Of Science
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Higuchi Kenichi
Ip Radio Network Development Department Ntt Docomo Inc.
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Higuchi Kenichi
R&d Department Ntt Mobile Communications Network Inc.
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ANDOH Hidehiro
R&D Department, NTT Mobile Communications Network Inc.
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HIGUCHI Kenichi
R&D Department, NTT Mobile Communications Network Inc.
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Sawahashi Mamoru
Wireless Laboratories Ntt Do Como Inc.
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Sawahashi Mamoru
R&d Department Ntt Mobile Communications Network Inc.
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Andoh H
R&d Department Ntt Mobile Communications Network Inc.
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Sawahashi M
Ip Radio Network Development Department Ntt Docomo Inc.
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