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Range-resolved vibration using large time-bandwidth product LADAR waveforms

  • US 8,947,647 B2
  • Filed: 12/13/2011
  • Issued: 02/03/2015
  • Est. Priority Date: 12/13/2011
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • forming range bins from range compressed data, the range compressed data comprising a train of coherent pulses formed from a return signal originating from a transmitted signal reflected from an object, the transmitted signal generated by a laser detection and ranging (LADAR) sensor, the train of coherent pulses having a large time-bandwidth product, the large time-bandwidth product being a product of coherent integration time times a bandwidth, the large time-bandwidth product being greater than 100;

    for each range bin,compensating for motion of the LADAR sensor;

    performing a Fourier transform on the range compressed data;

    determining a centroid of individual velocity measurements by determining an instantaneous Doppler frequency of a peak intensity of each vertical line that represents an instantaneous velocity at that point in time; and

    performing a Fourier transform of the centroid to determine a vibration.

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