基于高阶统计量的ISAR干扰效果评估方法  

Evaluation method of jamming effect on ISAR based on higher-order statistics

作　　者：王春艳[1] 赵艳丽[1] 

机构地区：[1]华东电子工程研究所,安徽合肥230088

出　　处：《航天电子对抗》2011年第5期57-60,共4页Aerospace Electronic Warfare

摘　　要：针对ISAR受干扰前后目标图像的灰度分布在统计特性上的差异,提出了一种基于高阶统计量的干扰效果评估方法。借助于描述概率分布对称性和高斯性的斜度和峰度,将干扰效果评估问题转化为图像灰度分布特性的变化问题,同时,为了使评估结果具有归一化的特点,定义了斜度相似度和峰度相似度的概念,分别就射频噪声干扰和噪声调频干扰进行了干扰仿真。仿真结果表明此方法具有客观、定量和归一化的优点,是一种切实可行的评估方法。According to the difference in statistical characteristic of ISAR target images before and after jamming,a new method to evaluate ISAR jamming effect based on higher-order statistics is proposed.Recurring to skewness and kurtosis applied to describe the characteristics of symmetry and gauss of probability distribution,the evaluation of jamming effect is translated into the variability problem of distribution of image gray.For the sake of making the evaluation results have the merit of unitary,the concepts of similarity degree of skewness and similarity degree of kurtosis are defined,and two typical blanket jamming modes,RF noise jamming and FM noise jamming,are employed in simulation of interference with ISAR.The result shows the method proposed has the merits such as objective,quantitative and unitary,and it is an effective method to evaluate jamming effect on ISAR.

关 键 词：ISAR 干扰效果 高阶统计量 压制性干扰 

分 类 号：TN974[电子电信—信号与信息处理]