A new method for wide field synthetic aperture radar processing

Synthetic aperture radar (SAR) data focusing can be carried out by filtering the raw signal in the two-dimensional Fourier domain and by applying a change of variables often referred to as Stolt interpolation. The basic idea of the paper is to present a new algorithm based on a non standard Fourier transform which allows the exact implementation of the Stolt change of variables. Efficiency of the presented procedure is due to the possibility of applying fast Fourier transform (FFT) codes. Moreover the algorithm doesn´t require any modification if the data are already range compressed and also if the SAR system transmits a signal different from a linear FM chirp