Robust High-Resolution and Wide-Swath SAR imaging based on topelitz preprocessing

Along-track multi-channel spaceborne SAR system, capable of overcoming the minimum antenna area constraint, is promising in High-Resolution and Wide-Swath imaging by suppressing Doppler ambiguity. The space-time adaptive processing (STAP) is one of the effective methods to suppress the Doppler ambiguity. However, the lack of snapshots and channel errors will degrade its performance greatly. In this paper, a new channel calibration method based on topelitz preprocessing is proposed, which is capable of overcoming these non-ideal factors. Finally, the simulations confirm the validity of the method.