Low insertion loss surface acoustic wave matched filter with low sidelobe sequence and its application for spread spectrum communication

Takashi Shiba, Akitsuna Yuhara, Minoru Moteki, Yasuhiro Ota, Kazuhide Tamizu, Daini Okajima, Kouji Oda, Kazuo Tsubouchi

Research output: Contribution to journalArticle

Abstract

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 20 m) and low current (210 mA when received) performances are obtained.

Original languageEnglish
Pages (from-to)3024-3027
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume35
Issue number5 B
Publication statusPublished - 1996 Dec 1
Externally publishedYes

Keywords

  • Autocorrelation
  • SAW matched filter
  • Spread spectrum communication
  • Weak-power modem
  • Weak-power radiation
  • ZnO thin film

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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