An Novel Imaging Algorithm for MEB SAR Systems With Channel Errors

An novel imaging algorithm for multiple elevation beam (MEB) synthetic aperture radar (SAR) systems with channel phase errors is presented. Considering their effect on the imaging result, the estimation of channel phase errors is converted into the estimation of the direction of arrive (DOA) angles of the received signal, and the sparse-based algorithm is adopted. After obtaining the DOA angles, the overlapped subpulses can be separated. Then the traditional imaging method can be utilized to achieve the high resolution SAR image. Finally, the simulation result confirms the proposed method.