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Signal acquisition system for spread spectrum receiver

  • US 6,909,739 B1
  • Filed: 10/13/2000
  • Issued: 06/21/2005
  • Est. Priority Date: 10/13/1999
  • Status: Expired due to Term
First Claim
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1. A device for detecting a demodulated signal received by a spread spectrum receiver and converted into a demodulated digital sample signal, the device comprising:

  • a matched filter for calculating a correlation between an incoming signal and at least one reference signal;

    an oscillator for generating a sampling frequency;

    a sampling circuit for re-sampling said demodulated digital sample signal at said sampling frequency, which is such that the timing of samples of a sample signal going from the sampling circuit to the matched filter corresponds to the timing of the at least one reference signals of the matched filter; and

    a multiplier in which the sample signal is multiplied by a carrier replica generated locally before the sampling circuit or thereafter, to remove the carrier from the sample signal.

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