Low Insertion Loss Surface Acoustic Wave Matched Filter with Low Sidelobe Sequence and Its Application for Spread Spectrum Communication
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概要
- 論文の詳細を見る
For direct sequence (DS) spread spectrum communication systems with differential phase-shift keying (DPSK) modulation, we have calculated low autocorrelation sidelobe pseudo noise (PN) sequences. We constructed a matched filter comprising localized layered structure on a quartz crystal to obtain low matching loss. As a result of the sequences and the construction, 14 dB (6 dB improvement on that of the conventional sequences) peak vs sidelobe of correlated output signal and 9 dB lower loss than that of a conventional filter was achieved. We have applied these matched filters to SS rf-modem units for weak-power digital communications. In these modem units high data rate (1 Mbps), long communication distance (about 20m) and low current (210mA when received) performances are obtained.
- 社団法人応用物理学会の論文
- 1996-05-30
著者
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茂木 稔
日立メディアエレクトロニクス
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茂木 稔
(株)日立製作所横浜工場
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TSUBOUCHI Kazuo
Research Institute of Electrical Communication, Tohoku University
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Ota Yasuhiro
Multimedia Systems R & D Division Hitachi Ltd.
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Oda Kouji
Hitachi Media Electronics Ltd.
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Shiba T
Hitachi Ltd. Yokohama Jpn
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Shiba Takashi
Multimedia Systems R & D Division Hitachi Ltd.
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Yuhara Akitsuna
Multimedia Systems R & D Division Hitachi Ltd.
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Tsubouchi Kazuo
Research Institute Of Electrical Communicaiton Tohoku University
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MOTEKI Minoru
Hitachi Media Electronics Ltd.
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TAMIZU Kazuhide
Hitachi Media Electronics Ltd.
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OKAJIMA Daini
Hitachi Media Electronics Ltd.
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TSUBOUCHI Kazuo
Research Institute of Electric Communication (RIEC), Tohoku University
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