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Apparatus and method for suppressing side lobe response in a digitally sampled system

  • US 4,513,385 A
  • Filed: 01/31/1983
  • Issued: 04/23/1985
  • Est. Priority Date: 01/31/1983
  • Status: Expired due to Term
First Claim
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1. A decoder circuit for detecting the presence of a signal exhibiting a predetermined frequency, comprising:

  • timing means for generating observation interval signals;

    sampling means, responsive to said timing means, for sampling a first signal to produce samples thereof including a first sample during a substantially rectangular observation interval, said sampling means including means for ignoring a portion of said samples occurring near the beginning of said observation interal and after said first sample, andcorrelation means, electrical coupled to said sampling means, for correlating said samples with a predetermined pattern to detect the presence of a signal exhibiting said predetermined frequency within said first signal.

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