A Study on Optimum Weights for Delay Transmit Diversity for DS-CDMA in a Frequency Non-selective Fading Channel(Wireless Communication Technology)
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概要
- 論文の詳細を見る
In this paper, we study DS-CDMA delay transmit diversity that transmits the weighted and time-delayed versions of the same signal from multiple antennas in a frequency non-selective fading environment. At a receiver, one receive antenna is used and the received delayed signals are coherently combined by Rake receiver. The set of optimum antenna weights for maximizing the received signal-to-noise power ratio (SNR) is theoretically derived to reveal that the optimum solution is to transmit only from the best antenna that has the maximum channel gain. The bit error rate (BER) performance improvement over conventional delay transmit diversity is theoretically analyzed and confirmed by computer simulations. The combined effect of transmit diversity and transmit power control (TPC) is also evaluated. Furthermore, the impact of fading decor-relation between the transmit and receive channels is also investigated for both the time division duplex (TDD) and frequency division duplex (FDD) schemes.
- 社団法人電子情報通信学会の論文
- 2004-04-01
著者
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Adachi Fumiyuki
Department Of Electrical And Communication Engineering Graduate School Of Engineering Tohoku Univers
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Adachi Fumiyuki
Department Of Electrical And Communication Engineering Tohoku University
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Kudoh Eisuke
Department Of Electrical And Communication Engineering Graduate School Of Engineering Tohoku Univers
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Katoh Akihito
Department Of Electrical And Communication Engineering Graduate School Of Engineering Tohoku Univers
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Katoh Akihito
Department Of Electrical And Coimmunicalion Engineering Graduate School Of Engineering.tohoku Univer
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Adachi Fumiyuki
Department Of Electorical Communication Engineering Graduate School Of Engineering Tohoku University
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Adachi Fumiyuki
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
The Department Of Electrical And Communication Engineering Graduate School Of Engineering Tohoku Uni
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Kudoh Eisuke
Department Of Electrical And Communication Engineering Graduate School Of Engineering Tohoku Univers
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Adachi Fumiyuki
The Department Of Electrical And Communication Engineering Tohoku University
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Adachi Fumiyuki
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
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
Department Of Electrical And Communication Engineering Graduate School Of Engineering Tohoku Univers
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Adachi Fumiyuki
Graduate School Of Engineering Tohoku University
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ADACHI Fumiyuki
Department of Communications Engineering, Graduate School of Engineering, Tohoku University
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Adachi Fumiyuki
Department of communication Engineering
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