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Interrogator and system employing the same

  • US 9,035,774 B2
  • Filed: 04/10/2012
  • Issued: 05/19/2015
  • Est. Priority Date: 04/11/2011
  • Status: Active Grant
First Claim
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1. An interrogator, comprising:

  • a receiver configured to receive return signals from a tag;

    a sensing module configured to provide time estimates associated with said return signals; and

    a processor configured to employ synthetic aperture radar processing with a mismatched filter to enhance a resolution of a correlation peak on said return signals in accordance with said time estimates and an estimated velocity of said interrogator to coherently integrate said return signals to locate a position of said tag, said mismatched filter being formed with filter tap values that enhance an output signal-to-noise ratio of said mismatched filter while reducing peak sidelobes thereof.

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