基于等效视数的ISAR干扰效果评估方法

Evaluation method of jamming effect on ISAR based on equivalent number of looks

由于逆合成孔径雷达(ISAR)是一种新体制雷达,一些用于评估常规体制雷达干扰效果的方法和手段对于ISAR来说并不适用。综合考虑雷达干扰的原理和图像处理的理论,从等效视数的角度出发,提出了一种新的对ISAR压制干扰效果的评估方法,即采用干扰前后两幅图像的等效视数差来评估干扰效果,该方法能清楚地反映受干扰目标从临界干扰到严重干扰整个过程中目标图像的失真程度,仿真结果表明了该评估方法的正确性和有效性。

Some methods used to evaluate the jamming effect of common radar are unsuitable to ISAR be- cause of its new work system. Considering the principle of radar jamming and the theory of image disposal, a new evaluation method of barrage jamming effect on ISAR based on the concept of equivalent number of looks （ENL） is proposed, it evaluates the jamming effect through calculating the difference of two picture＇s ENL, This method can reflect clearly distortion degree of the jammed target during the whole jamming process. The results of simulation prove the method is corrective and effective.