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运用幅度相关法进行包络对齐时存在漂移和突跳误差,有时可大到几个距离单元长度,从而严重影响成像质量,文中把前后向线性预测外推方法应用于提高距离剖面的分辨率,增强回波包络的稳定性,提高包络对齐的精度,减小包络对齐时包络位置的漂移和突跳现象,改善 ISAR(Inverse Sythetic Aperture Radar)成像质量.对实测数据的处理结果清楚地表明,与常规方法相比,该方法具有明显的优越性.
There are drift and kicking error when using amplitude correlation method to envelop alignment, and sometimes can reach a few distance unit length, thus seriously affecting the imaging quality. In this paper, the forward and backward linear prediction extrapolation method is applied to improve the resolution of distance profile, Enhance the stability of echo envelope, improve the precision of envelope alignment, reduce the drift and sudden jump of envelope position when envelope alignment, and improve the imaging quality of Inverse Systhetic Aperture Radar It has been shown that this method has obvious advantages over the conventional methods.