Implementation of and Field Experiment on High-Speed Multimedia Multimode TDMA Radio Transmission Systems(Special Issue on Third Generation Land Mobile Communication Systems)
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概要
- 論文の詳細を見る
This paper gives laboratory as well as the results of field experiment and describes the implementation of a system developed to evaluate and demonstrate multimedia multimode time division multiple access(MTDMA). The equipment has been developed with the radio transmission technology for future public land mobile telecommunication systems(FPLMTS/IMT-2000) in mind. To meet FPLMTS/IMT-2000 requirements the system employs the following techniques: a hybrid multiplex modulation system consisting of quadrature phase shift keying(QPSK)and 16-ary quadrature amplitude modulation(16QAM), a high data transmission bit rate of 2 Mbit/sec for QPSK, 4 Mbit/sec for 16QAM, and diversity combining and adaptive qualization technique. For the diversity adaptive equalization technique, we used a decision feedback equalizer(DFE)consistingof one feedback(FB)transversal filterand two feed-forward transversal(FF)filters. The output signals from two branches of space diversity reception antennas are then fed to the two FF filters of the DFE. For middle-speed mobile radio communication for a micro-cellular pedestrian environment, a QPSK modulation system is selected to obtain wide coverage, while for a pico-cellular indoor office environment, the delay spread is small, and a 16QAM modulation system is selected to achieve a high bit rate. The results given here oflaboratory and field experiments showthe technical feasibility of MTDMA for future public land mobile telecommunication systems.
- 社団法人電子情報通信学会の論文
- 1998-07-25
著者
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Hamaguchi K
National Inst. Information And Communications Technol. (nict) Yokosuka‐shi Jpn
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Hamaguchi Kiyoshi
Communications Research Laboratory Independent Administrative Institution
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Kamio Yukiyoshi
Communications Research Laboratory Independent Administrative Institution
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Kamio Yukiyoshi
The Communication Research Laboratory
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Kamio Y
National Inst. Information And Communications Technol. (nict) Yokosuka‐shi Jpn
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MORIYAMA Eimatsu
Communications Research Laboratory, Independent Administrative Institution
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HAMAGUCHI Kiyoshi
the Communications Research Laboratory, Ministry of Posts and Telecommunications
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MORIYAMA Eimatsu
the Communications Research Laboratory, Ministry of Posts and Telecommunications
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Moriyama E
Communications Research Laboratory Independent Administrative Institution
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