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Spread spectrum code tracking loop

  • US 4,285,060 A
  • Filed: 02/28/1978
  • Issued: 08/18/1981
  • Est. Priority Date: 02/28/1978
  • Status: Expired due to Term
First Claim
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1. A code timing recovery system for a spreadspectrum receiver comprising:

  • first means for combining a received spreadspectrum signal containing a transmitted random sequence of pulses with first and second locally generated random sequences of pulses having a prescribed phase difference therebetween, to thereby produce first and second output signals representative of correlations of the random sequence of pulses contained in said received spread-spectrum signal with said first and second locally generated random sequences of pulses, respectively, andsecond means, coupled to said first means, for controlling the timing of said first and second locally generated random sequence of pulses in accordance with the difference between the squares of said first and second output signals.

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