Patent ID: 8169362

Claim:
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.