Novel Narrowband Interference Rejection for an Asynchronous Spread Spectrum Wireless Modem Using a SAW Convolver (Special Issue on Spread Spectrum Techniques and Applications)

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Description

An asynchronous spread spectrum (SS) wireless modem has been implemented using an efficient ZnO-SiO_2-Si surface acoustic wave (SAW) convolver. The modem is based on a direct-sequence / 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 self-convolution canceler are implemented in the SS modem for the reference signal control. It was found that the antijam capability for narrowband interference is at least -24 dB of desired-to-undesired power ratio (D / U); the improvement of the antijam capability is 16 dB up as compared with our previous SS modem.

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Details 詳細情報について

  • CRID
    1573387452278498560
  • NII Article ID
    110003217019
  • NII Book ID
    AA10826261
  • ISSN
    09168516
  • Text Lang
    en
  • Data Source
    • CiNii Articles

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