초록 ▼

An interferometric moving target radar imaging system includes a plurality of simultaneously operating apertures, receivers and processing channels which together coherently process RF return signals to image a moving vehicle. The system corrects for the different phase centers of the apertures and

An interferometric moving target radar imaging system includes a plurality of simultaneously operating apertures, receivers and processing channels which together coherently process RF return signals to image a moving vehicle. The system corrects for the different phase centers of the apertures and interferometrically combines the return signals from different apertures to attenuate the energy from stationary objects. The true azimuth location of the moving vehicle within main beam clutter spread is then determined which facilitates distinguishing between slow moving and stationary objects to detect the moving objects which are then tracked and imaged in the range doppler domain.

대표청구항 ▼

[ What is claimed is:] [1.] A radar system which transmits a pulsed waveform from a multi-aperture antenna having at least three apertures and receives backscattered energy from stationary and moving objects illuminated by each of the apertures and processes the signals received by each aperture sep

[ What is claimed is:] [1.] A radar system which transmits a pulsed waveform from a multi-aperture antenna having at least three apertures and receives backscattered energy from stationary and moving objects illuminated by each of the apertures and processes the signals received by each aperture separately to provide a plurality of received signals which are pulse compressed, motion compensated and transformed to the range doppler domain to provide a plurality of compensated received signals which are processed to form images of the stationary and moving objects, the system comprising:signal processing apparatus responsive to at least one of the plurality of compensated received signals for forming an image of the stationary objects; andinterferometric moving target focusing apparatus which receives and partitions the compensated received signals for at least three of the apertures into temporal subdwell data blocks, and corrects said subdwell data blocks for the differences in the phase centers of their associated apertures, and interferometrically combines the subdwell data blocks to attenuate the return energy associated with stationary objects and provide a first clutter canceled data block and a second clutter canceled data block which are further processed to detect moving objects, by comparing the magnitude and phase angle of the various return signals in said first and second clutter canceled data blocks to detect the moving objects, and combining said first and second clutter canceled data blocks in the range doppler domain to form a range doppler image of the detected moving objects.