Novel narrowband interference rejection for asynchronous spread spectrum wireless modem using a saw convolver

H. Nakase, K. Tsubouchi

Research output: Contribution to conferencePaperpeer-review

2 Citations (Scopus)

Abstract

An asynchronous spread spectrum (SS) wireless modem has been implemented using an efficient Zn0-Si02-Si surface acoustic wave (SAW) convolver. The modem is based on a direct-sequence I frequency-shift-keying (DS/FSK) method for the modulation. The demodulation is carried out asynchronously utilizing the coherent correlation characteristics of the SAW convolver. In order to improve the narrowband interference rejection capability, we propose a new technique based on the reference signal control. A notched-reference-signal circuit and a selfconvolution canceler are implemented in the SS modem for the reference signal control. It is found that the antijam capability for narrowband interference is at least -24dB of desired-toundesired power ratio (DIU); the improvement of the antijam capability is 16dB up as compared with our previous SS modem.

Original languageEnglish
Pages267-270
Number of pages4
DOIs
Publication statusPublished - 1992 Jan 1
Event2nd IEEE International Symposium on Spread Spectrum Techniques and Applications, ISSTA 1992 - Yokohama, Japan
Duration: 1992 Nov 291992 Dec 2

Conference

Conference2nd IEEE International Symposium on Spread Spectrum Techniques and Applications, ISSTA 1992
CountryJapan
CityYokohama
Period92/11/2992/12/2

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing

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