摘要
由于逆合成孔径雷达(ISAR)不同于常规雷达,一些用于评估常规雷达干扰效果的方法不适用于ISAR。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,对ISAR进行了干扰仿真,并应用该方法从定量的角度对ISAR干扰效果进行了评估,得出了与定性评估相同的结论。同时结果也证明了该指标的有效性和可行性。
Some methods used to evaluate jamming because of its difference from common radar. In the effect on common radar are not applicable to ISAR paper, the cross entropy theory is utilized to evaluate the jamming effect on ISAR. From the perspective of information theory, cross entropy is imported into the jamming effect evaluation. The concept of symmetry cross entropy is also presented to compensate the defect of such evaluation. It is proved theoretically that cross entropy is a means of distance measurement, and a new evaluation model with symmetry cross entropy as the index is established. In the final part of this paper, two typical noise blanket jamming modes, RF noise jamming and FM noise jamming, are employed in the simulation of interference with ISAR. Quantitative jamming effect evaluation is carried out by means of symmetry cross entropy, and a conclusion identical to that drawn from qualitative evaluation is obtained. Meanwhile the result shows that the index proposed is effective and feasible.
出处
《中国电子科学研究院学报》
2009年第2期177-180,共4页
Journal of China Academy of Electronics and Information Technology
