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Process for determining the intermediate frequency deviation in frequency pulsed radar systems

  • US 5,864,313 A
  • Filed: 08/29/1997
  • Issued: 01/26/1999
  • Est. Priority Date: 04/06/1995
  • Status: Expired due to Fees
First Claim
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1. For use in a frequency-pulse radar system wherein echo signals from transmitted pulses are mixed with an intermediate frequency which is based on a reference frequency, a method for determining a deviation of said intermediate frequency relative to said reference frequency, said method comprising the steps of:

  • sampling echo pulses contained in an echo signal reflected from an individual target object, at a plurality of phase staggered points within one of a single echo pulse and successive echo pulses of said echo signal, to obtain sampled values thereof;

    Doppler filtering said sampled values whereby a plurality of Doppler signals having the same frequency are generated; and

    determining said deviation of said intermediate frequency as a function of phase differences of said Doppler signals.

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