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Mobile sense through the wall radar system

  • US 20110025546A1
  • Filed: 08/03/2009
  • Published: 02/03/2011
  • Est. Priority Date: 08/03/2009
  • Status: Active Grant
First Claim
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1. A method for sensing a target through a wall or obstruction by a Moving Target Indicator (MTI) radar sensor and including a transmitter and a receiver, comprising:

  • transmitting a series of radar pulses at frequencies less than about 5 GHz;

    receiving radar return signals from a plurality of receive antenna array subapertures;

    processing the radar return signals from each of the plurality of receive antenna subapertures in respective receive channels each corresponding to a respective receive antenna subaperture to;

    digitize analog radar return signals and provide complex time samples of the radar return signals;

    process the complex time samples by a digital beamformer to form multiple beams;

    process the beamformer outputs through a complex FFT processor to provide a range matrix map of clutter and targets for each channel;

    process a time series of range matrix maps comprising a coherent processing interval through a Doppler compression function to provide range-Doppler maps indicating moving target velocities at each range;

    performing target detection processing on the outputs of the Doppler compression function for each channel to detect moving and stationary targets through a plurality of parallel target detection signal processing paths, to provide target detection signals representing detected moving and stationary targets and their range and angular location; and

    providing the target detection signals to an operator interface.

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