Airborne Downward-looking MIMO 3D-SAR Imaging Algorithm Based on Cross-track Thinned Array

Three dimensional SAR imaging technology based on linear array is one of the most important three dimensional SAR high resolution imaging methods. In this paper, transmit and receive antenna elements are placed to form cross-track thinned downward-looking array MIMO 3D-SAR. The imaging geometry and three dimensional echo signal model of cross-track thinned array MIMO 3D-SAR is analyzed, and an applicative imaging algorithm based on cross-track thinned array MIMO 3D-SAR is given. Finally, by emulation experiments, the imaging algorithm is verified and the 3D-SAR imaging results are analyzed.