Patent ID: 7106243

Claim:
A radar receiver on a moving platform for imaging a moving target from radar returns from a scene containing said moving target and clutter, said radar receiver comprising: an analog to digital converter for converting said radar returns into digital radar returns descriptive of said scene containing said moving target and said clutter; a digital computer for performing the steps of: motion compensating said digital radar returns with respect to a reference, said reference within said scene to obtain motion compensated data for computing a synthetic aperture image of said scene; estimating a phase error of said clutter within said motion compensated data and compensating said motion compensated data for said phase error to obtain an autofocused synthetic aperture image, said autofocused synthetic aperture image composed of pixels; detecting a plurality of moving target pixels descriptive of said moving target among said pixels of said autofocused synthetic aperture image; transforming said plurality of moving target pixels from said autofocused image to a time domain moving target data; focusing said time domain moving target data by iteratively applying a phase compensation to said time domain moving target data.