New results on the Omega-k algorithm for processing synthetic aperture radar data

This paper compares the peak SNR and the point target impulse response function of stripmap SAR data processed with the well-known Omega-k algorithm and ideal matched filtering. The impulse response function resulting from Omega-k is distorted and stretched in azimuth compared to a matched filter. The distortion depends on the amount of frequency shift required in the Stolt mapping step. In at least some cases, the range resolution is improved compared to matched filtering at the expanse of additional azimuth interference.