Wideband Wireless Access Based on DS-CDMA(Special Issue on Third Generation Land Mobile Communication Systems)
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概要
- 論文の詳細を見る
Wideband wireless access based on direct sequence code division multiple access, called coherent multi-rateW-CDMA in this paper, designed for next generation mobile communications systems is introduced. It employs inter-cell asynchronous operation with a fast cell search algorithm, orthogonal multi-spreading factor(SF)forward links, and pilot symbol assisted coherent reverse and forward links. Inter-cell asynchronous cell site operation facilitates the continuous deployment of thesystem from outdoors to indoors. An orthogonal multi-SF forward link allowsflexible offering of different multi-rate services to users without losing orthogonality. Gains in the radio linkcapacity and coverage are obtained from the use of coherent Rake combining and fast transmit power control(TPC)inboth forward and reverse links. Computer simulation and field experiment results of the coherent multi-rate W-CDMA radio link performance are presented. Also presented are interference cancellation and adaptive antenna array techniques that can significantly improve the link capacity and coverage.
- 社団法人電子情報通信学会の論文
- 1998-07-25
著者
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ADACHI Fumiyuki
R&D Department, NTT Mobile Communications Network Inc.
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SAWAHASHI Mamoru
R&D Department, NTT Mobile Communications Network, Inc.
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Adachi Fumiyuki
R&d Department Ntt Mobile Communications Network Inc.
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SAWAHASHI Mamoru
R&D Department, NTT Mobile Communications Network, Inc.
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