基于对称交互熵的ISAR干扰效果评估方法

Evaluation method of jamming effects on ISAR based on symmetric cross entropy

从信息论的角度出发,将交互熵引入到ISAR干扰效果评估中。针对其不满足对称性的不足,提出了对称交互熵的概念,并从理论上证明了对称交互熵是一种距离测度,从而建立了以对称交互熵为指标的评估模型。最后,针对射频噪声干扰和噪声调频干扰两种典型的压制性干扰样式进行了干扰仿真,并应用对称交互熵从定量的角度对ISAR压制性干扰效果进行了评估。得出的结论与定性评估一致,表明了该方法的有效性和可行性。

The cross entropy theory is utilized to evaluate the jamming effects on ISAR. The concept of symmetric cross entropy is presented to compensate the shortcoming of the cross entropy in meeting symmetry, and it is a kind of distance measure proved theoretically. Then, a new evaluation model is founded by using the symmetric cross entropy as an evaluation index. In the end, two typical noise blanket jamming modes, RF noise jamming and FM noise jamming, are employed in the jamming simulation of interference with ISAR, and the symmetric cross entropy is used to quantitatively evaluate jamming effects, and the result is consistent with that of qualitative evaluation. The result also shows that the proposed method is effective and feasible.