Isar Jamming Effect Evaluation Techniques

As a high resolution radar, Inverse synthetic aperture radar(ISAR) can image the target at all-weather, whole day hour and long-distance, and has been vast applied both in the military and in public realms. At present, lots of ISAR jamming methods have been proposed, but there is no unified standards and theoretical innovation in ISAR jamming effect evaluation. Under the support of"ISAR jamming technology research"project, the research work is achieved as follows:1,Jamming effect evaluation for ISAR based on cross-entropyFrom the aspects of anti-jamming, a effective jamming method must have this character: the jamming signals are similar with the ISAR ethos in multidimensional characteristics; If the similarity is changed in the jamming, the direct result is the radar image entropy changes. On this basis, a new jamming effect evaluation method is proposed on the quality analysis of the image entropy changes and the information loss. A lot of simulation experiments results have confirmed the effectivity of the method.2,Jamming effect evaluation for ISAR based on similarityBased on the analysis of conventional jamming effect evaluation methods, a new method based on the image similarity is proposed. The paper put forward the definition and properties of the similarity from the start, then introduced the jamming effect evaluation systems, at last, the effectivity of the methods is proved by the experiments results.3,Jamming effect evaluation for deception jamming of ISARThe different deception jamming models are evaluated by the two methods separately, and make a method improvement of the similarity. Then a new method based on the fractal dimension is proposed for system evaluation of deception jamming with other methods.