Patent ID: 8493262
Filing Date: 2013-07-23
Classification: G01S

Abstract:
1. Method for processing an input signal acquired by a synthetic aperture radar (SAR) system, wherein the input signal is saturated, the method comprising the steps of: estimating an initial reconstruction that generated the input signal; reproducing the input signal from the reconstruction to generate a reproduced signal; comparing the reproduced signal with the input signal; adjusting an estimated reconstruction based on the comparison; applying an azimuth Fourier transform (FFT) to the input signal; applying a first chirp scaling to an output of the azimuth FFT; applying a range FFT to an output of the first chirp scaling; multiplying an output of the range FFT by a range frequency response; applying a range inverse FFT (IFFT) to an output of the range frequency response; applying a second chirp scaling to an output of the range IFFT; multiplying an output of the second chirp scaling by an azimuth frequency response; applying an azimuth IFFT to an output of the azimuth frequency response to form the reconstructed SAR image; and iterating from the reproducing step until a termination condition is reached to form a reconstructed SAR image, wherein the steps are performed in a processor.