Parallel-Type Coherent Multi-Stage Interference Canceller with Iterative Channel Estimation Using Both Pilot and Decision-Feedback Data Symbols for W-CDMA Mobile Radio(Special Issue on Innovative Mobile Communication Technologies at the Dawn of the 21^<st
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概要
- 論文の詳細を見る
In order to increase the link capacity in the wideband direct sequence code division multiple access (W-CDMA) reverse link, employing a parallel-type coherent multistage interference canceller (COMSIC) is more practical than employing a serial (successive)-type due to its inherent advantage of a short processing delay, although its interference suppression effect is inferior to that of the serial-type. Therefore, this paper proposes a parallel-type COMSIC with iterative channel estimation (ICE) using both pilot and decision-feedback data symbols at each canceling stage in order to improve the interference suppression effect of the parallel-type COMSIC. Computer simulation results demonstrate that by applying the parallel-type COMSIC with ICE after FEC decoding, the capacity in an isolated cell can be increased by approximately 1.6(2.5) times that of the conventional parallel-type COMSIC with channel estimation using only pilot symbols (the MF-based Rake receiver) at the required average transmit E_b/N_0 of 15dB, i.e.in the interference-limited channel. The results also show that, although the capacity in the isolated cell with the parallel-type COMSIC with ICE after EFC decoding is degraded by approximately 6% compared to that with the serial-type COMISIC with ICE after FEC decoding, the processing delay can be significantly decreased owing to the simultaneous parallel operation especially when the number of active users is large.
- 社団法人電子情報通信学会の論文
- 2001-03-01
著者
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HIGUCHI Kenichi
Wireless Laboratories, NTT DoCoMo, Inc.
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SAWAHASHI Mamoru
Wireless Laboratories, NTT DoCoMo, Inc.
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Okawa K
Wireless Research Laboratories Ntt Docomo Inc.
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Okawa Koichi
Wireless Laboratories Ntt Do Como Inc.
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Higuchi K
Wireless Research Laboratories Ntt Docomo Inc.
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Higuchi K
Department Of Electrical Engineering Tokyo University Of Science
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Sawahashi Mamoru
Department Of Electrical Engineering Tokyo University Of Science
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Sawahashi Mamoru
Wireless Laboratories Ntt Do Como Inc.
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Higuchi Kenichi
Wireless Laboratories Ntt Docomo Inc.
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Higuchi Kenichi
Department Of Electrical Engineering Tokyo University Of Science
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