A comparison between SAR data compression in Cartesian and polar coordinates

摘要

A wavelet-based method for the lossy compression of single-look complex synthetic aperture radar (SAR) data is presented, together with a comparison between SAR data compressions in Cartesian and polar coordinates. It shows that the compression of complex SAR data in polar coordinates has smaller amplitude and phase errors than in Cartesian coordinates. The compression in polar coordinates requires bit allocation processing between amplitude and phase. This is achieved by phase scaling before compression, and the method is given for scale factor calculation.