摘要
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.
A method to increase the accuracy of range alignment applying the forward-backward linear prediction is presented.The drift and jump errors will result it the classical amplitude correlation method is used to align the envelope of the echoes.Sometimes,these errors are so great that they are equal to the width of several range bins.So the quality of image is badly affected.By using the FBLP method,the resolution of the range section is improved and the stability of the echo envelope is increased.Hence the range alignment is more accurate,drifts and jumps of echo envelope are decreased and the quality of the image is improved.From the image result of real measured data,it can be seen that this method is much better than the classical one.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
1997年第A00期109-115,共7页
Journal of Xidian University
基金
国防预研基金资助
