关键词: 相位误差, 延时消去法, 脉冲积累, 实时合成孔径雷达, 自聚焦

Abstract:

For practical SAR systems, the motion errors of radar platform lead to the azimuth phase history errors which lead to defocus images. We propose a modified autofocus method which applies the delay and remove algorithm for more effectively estimating the real phase history based on azimuth data. With this method a better focused image is achieved. The algorithm is efficient for real-time SAR system. The focus processing results of SAR measured data show that the proposed method is effective.

Key words: phase error, delay and remove algorithm, pulse integral, real time SAR autofocus, auto focus