A Channel Equalization Technique on a Time Division Duplex CDMA/TDMA System for Wireless Multimedia Networks
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概要
- 論文の詳細を見る
A channel equalization technique on a time division duplex CDMA/TDMA system for wireless multimedia networks is investigated, and the bit error rate performance of the system is theoretically analyzed. The assumed network connects mobile terminals to a node of ATM based high speed LAN through a radio central unit. Only human interface facilities are implemented into the terminal so that users access integrated services through the node of the network. The uplink (from a mobile terminal to a radio central unit) employs a CDMA scheme to transmit human interface signals and the downlink employs a TDMA scheme to transmit display interface signals. Both the CDMA and the TDMA signals occupy the same frequency band. To mitigate bit error rate degradation due to fading, the radio central unit estimates the impulse response of the channel from the received CDMA signals and subtracts the replica signal to cancel the major intersymbol interference (ISI) component. Numerical results using the Nakagami-m fading model and recent propagation measurements show that the proposed TPC technique compensates the fading attenuation and the proposed CEQ cancels the major ISI component. The bit error rate performance of the downlink with the proposed CEQ is superior to that with the DFE by 12 dB of the symbol SNR at the BER = 10^<-6> over a specular channel, and the system with the proposed CEQ achieves a BER = 10^<-6> at the symbol SNR = 12dB. Furthermore, the channel equalizer is implemented without increases in complexity of the terminal because all the processing on the equalization is carried out only in the radio central unit.
- 社団法人電子情報通信学会の論文
- 1995-08-25
著者
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Kato Shuzo
Pacific Communications Research Corp.
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Sanada Yukitoshi
Department Of Electrical And Computer Engineering University Of Victoria
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Kato Shuzo
NTT Wireless Systems Laboratories
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NAKAGAWA Masao
Faculty of Science and Technology, Keio University
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Seki K
Research Center For Materials Science Nagoya University
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Seki Kazuhiko
Department Of Materials Science Faculty Of Science Hiroshima University
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WANG Qiang
Department of Chemistry and Chemical Biology, Gunma University
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Wang Q
Department Of Electrical And Computer Engineering University Of Victoria
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Wang Qiang
Department Of Materials Processing Engineering Nagoya University
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Bhargava V
Univ. British Columbia Can
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Bharhgava Vijay
Department Of Electrical And Computer Engineering University Of Victoria
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Nakagawa Masao
Keio Univ. Yokohama‐shi Jpn
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Sanada Yukitoshi
Faculty of Science and Technology, Keio University
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Bhargava Vijay
Department of Electrical and Computer Engineering, University of Victoria
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Sanada Yukitoshi
Faculty Of Science And Engineering Keio University
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Nakagawa Masao
Faculty Of Science And Technology Keio University
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Wang Qiang
Department Of Chemistry And Chemical Biology Gunma University
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Wang Qiang
北京気象学院
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Sanada Y
Dept. Of Electronics And Electrical Engineering Keio University
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Sanada Y
Faculty Of Engineering Tokyo Institute Of Technology
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Kohri Sachiko
Materials And Electronic Devices Laboratory Mitsubishi Electric Corporation
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Sanada Yukitoshi
Faculty Of Engineering Tokyo Institute Of Technology
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Wang Qiang
Department Of Anesthesiology Plastic Surgery Hospital Chinese Academy Of Medical Sciences And Peking
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Seki Kazuhiko
Department Of Chemistry Nagoya University
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Nakagawa Masao
Faculty Of Agriculture The University Of Tokyo
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Bhargava Vijay
Department of Electrical and Computer Eng., University of Victoria
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