Vehicle azimuth angle estimation of sar image based on target restoration

Aiming at the problem that only the boundaries near the radar appear as strong scattering points and the other boundaries are weakly scattered, this paper proposes an azimuth angle estimation method of vehicle based on target restoration. Through in-depth analysis of the vehicle target scattering structure and error sources, the method introduces the principle of symmetry to restore the target structure as much as possible, and uses the restored target to perform azimuth angle estimation, which solves the problem of inaccurate estimation value and unstable error of traditional methods. The experimental results of MSTAR measured data verify the accuracy and stability of the method.