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Calibration of differential frequency-dependent characteristics of a radio communications system

  • US 6,747,594 B2
  • Filed: 11/14/2002
  • Issued: 06/08/2004
  • Est. Priority Date: 09/28/2001
  • Status: Expired due to Fees
First Claim
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1. A signal processor to determine a group delay calibration vector based on at least two frequency bands of a received transponder signal, the signal processor comprising:

  • a circuit to compare relative characteristics for the transponder signal at a first one of the at least two frequencies to relative characteristics for the transponder signal at a second one of the at least two frequencies; and

    a circuit to determine a group delay calibration vector from the comparison.

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