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Spectrum spread communication system

  • US 5,222,098 A
  • Filed: 06/14/1991
  • Issued: 06/22/1993
  • Est. Priority Date: 06/15/1990
  • Status: Expired due to Fees
First Claim
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1. A transmitter for spectrum spread communication system comprising:

  • a PN code generator for generating a PN code;

    a frequency synthesizer for changing over and outputting a plurality of different frequency signals in response to said PN code supplied from said PN code generator;

    a mixing means for carrying out multiplication between a base band data input signal and said PN code supplied from said PN code generator;

    means for modulating a signal supplied form an AC signal source using a signal supplied from said mixing means to convert it into a high frequency signal; and

    means for subjecting an output signal of said modulating means to frequency hopping by means of an output signal of said frequency synthesizer;

    wherein one cycle of said frequency hopping includes one frequency which is subject to hopping at an interval equal to one cycle of a direct spread signal generated from said modulating means and at least two frequencies one of which is subject to hopping at an interval equal to one cycle of the direct spread signal generated from said modulating means.

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