3-D imaging of spaceborne distributed SAR based on phase preserving compressive sensing

Spaceborne multi-static synthetic aperture radar (SAR) with different baselines extends the synthetic aperture principle of monostatic SAR into the elevation direction for 3-D imaging. In this paper, an expression of 3-D SAR echo data is presented. To meet the requirements of 3-D imaging, a phase preserving compressive sensing approach is proposed to solve the ground reflectivity. Simulation experiments indicate that the phase of raw complex signal is well preserved and the 3-D image of interested area is reconstructed efficiently.