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Device for improving radar resolution

  • US 5,119,100 A
  • Filed: 03/21/1991
  • Issued: 06/02/1992
  • Est. Priority Date: 04/21/1989
  • Status: Expired due to Fees
First Claim
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1. A device for processing radar signals for improved target discrimination and resolution when the radar is mounted on a platform which may be moving and which target may be moving relative to the radar comprises:

  • an Inverse Synthetic Aperture Radar (ISAR) processor;

    means for receiving radar signals reflected from a target, said signal receiving means having an output for outputting radar target data samples related to said reflected radar signals to said ISAR processor;

    means for detecting motion of the platform on which the radar is mounted, said platform motion detecting means outputting to said ISAR processor platform motion data related to said platform motion;

    a radar tracking loop connected to said ISAR processor for providing kinematic target data to said ISAR processor;

    said ISAR processor processing the radar target data samples, the platform motion data and the kinematic target data and outputting processed data resulting from said processing, said processed data comprising an ISAR projected high resolution image profile of the target, an estimated value of the radial velocity of the target, and an estimated value of the tangential velocity of the target, each of said estimated values and said image being corrected by said ISAR processor to compensate for the motion of the platform and the motion of the target relative to the radar;

    means for determining target characteristics from said ISAR projected high resolution image profile of the target, said target characteristic determining means determining whether the reflected radar signals are from a single target or from multiple targets and for determining a length of the target from said image profile, said determining means outputting target characteristic data relating to the presence of single or multiple targets and target length data relating to target length; and

    means for visually displaying data, said visual display means visually displaying the processed data from said ISAR processor, said target characteristic data and said target length data for visual observation and interpretation.

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