基于高次模糊函数的SAR图像动目标检测

SAR图象中动目标运动形成的相位误差可描述为有限次幂级数，时频分析将时域信号变换为时频联合域，揭示出信号瞬时频率随时间的变化规律，应用高次模糊函数可估计出动目标信号的相位多项式系数，检测含高次相位误差的动目标，结合逐次消去法，可将其用于检测含高次相位误差的多个动目标.

Detection of Multi Moving Targets in a SAR Image Based on High-Oder Ambiguity Function

The time-frequency analysis can transform the time domain signal into time-frequency domain,and reveal the law of frequency changing with time.Combining with “clean” technique,the authors propose a multi moving targets indication method based on the modeling of instantaneous phase,induced by the relative radar/target motion,as a generic order polynomial and on the estimation of the polynomial coefficients by the so-called product high-order ambiguity function.  The simulation experiment result proves this method to be valid.