Phase Calibration Method for ATI-SAR System Based on Least Square Estimation and Wavelet-Denoising
基于最小二乘估计和小波去噪的ATI-SAR自适应相位校正方法

ATI-SAR system requires that the phase characteristic of the two channels is precisely matched. This paper analyzes the phase error of ATI-SAR system, gives the mathematic model, proposes a simple phase calibration method for ATI-SAR system based on Least Square Estimation (LSE) and wavelet-denoising and gives the calibration flow. The simulation results demonstrated that the phase error of ATI-SAR system is removed by this method. This method does require any knowledge of the platform velocity and actual crab angle. The problem of wrapped interferometric phases can be resolved by iterative of this method.