Multipath Interference Canceller for Orthogonal Code-Multiplexed Channels and Its Performance in W-CDMA Forward Link(Special Section on Multi-dimensional Mobile Information Networks)
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概要
- 論文の詳細を見る
This paper proposes a multipath interference canceller (MPIC) for orthogonal code multiplexed channels in the W-CDMA forward link and evaluates by computer simulation the improvement in BER performance owing to the multipath interference (MPI) suppression effect obtained by the MPIC. The simulation results show that a one-stage MPIC, which removes the MPI from the common pilot channel (PICH), common control channel (CCH), and synchronization channel (SCH), achieves a sufficient MPI suppression effect, and that the required received E_b/N_0 of the traffic channel (TCH) at the average BER of 10^<-3> using the MPIC for the common channels is decreased by approximately 6.5 dB compared to that with a matched filter (MF)-based Rake receiver (the transmit power ratio of each common channel to TCH: Δ_<PICH/TCH> = 0dB, Δ_<CCH/TCH> = 5dB, Δ_<SCH/TCH> = 3dB, without fast transmit power control (TPC) and antenna diversity reception). We also show that by using MPIC, the required transmit E_b/N_0 at the average BER of 10^<-3>, when the ratio of the target E_b/I_0 of the 9-interfering users to desired user is Δ_<Int/Des> = 6dB with fast TPC, is increased by only approximately 0.6dB compared to that when Δ_<Int/Des> = 0dB. This implies that the preferential MPI suppression from high-rate TCHs that abates the increase in complexity in a mobile terminal is effective in increasing the link capacity in the forward link.
- 社団法人電子情報通信学会の論文
- 2002-07-01
著者
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HIGUCHI Kenichi
Department of Electrical Engineering, Tokyo University of Science
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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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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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PRIANTORO Akhmad
Nara Institute of Science and Technology
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YAMAMOTO Heiichi
Nara Institute of Science and Technology
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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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Sawahashi M
Ip Radio Network Development Department Ntt Docomo Inc.
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Yamamoto Heiichi
Graduate School Of Information Science Nara Institute Of Science And Technology (naist)
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Yamamoto Heiichi
Nara Inst. Sci. And Technol. Ikoma‐shi Jpn
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