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Signal processing circuit for spread spectrum communications

  • US 5,610,939 A
  • Filed: 10/31/1995
  • Issued: 03/11/1997
  • Est. Priority Date: 02/17/1993
  • Status: Expired due to Fees
First Claim
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1. A digital correlator comprising:

  • non-inverting-or-inverting amplifier for receiving a signal obtained by a direct sequence type spread spectrum communication, for converting the received signal into a baseband signal and for inverting or not inverting a polarity of the received signal according to a polarity of a spreading code signal;

    an analog-to-digital converter for performing an analog-to-digital conversion on an output of the non-inverting-or-inverting amplifier;

    an integrator for integrating a digital signal obtained as a result of the analog-to-digital conversion performed by the analog-to-digital converter; and

    a squaring device for calculating a square of an output of the integrator and for outputting data representing a correlation according to the calculated square of the output of the integrator.

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