复杂电磁环境下末制导雷达工作状态实时判别方法

A Real-time Discrimination Method for Operating State of Terminal Guidance Radar in Complex Electromagnetic Environment

准确判别末制导雷达工作状态是推断敌方导弹威胁程度、评估我方电子战系统干扰效果的重要前提之一。针对复杂电磁环境下,由于信号不准确、不完整导致末制导雷达工作状态判别准确率低的问题,提出复杂电磁环境下末制导雷达工作状态实时判别方法。判别时基于状态断点离散方法将工作状态相同、特征值接近的样本归为一类,使得离散区间的划分更加合理,增强判别方法抗噪声能力;采用不完整信息基本概率分配(BPA)修正方法,通过相似度修正因子对支持向量机输出的BPA进行修正,在不引入人为误差情况下实现对不完整信息的利用。仿真实验表明,该判别方法有效提高了末制导雷达工作状态判别准确率。

The accurate judgment of operating state of terminal guidance radar is one of the important preconditions to infer the threat degree of enemy missile and evaluate the jamming effect of electronic warfare system.For low discrimination accuracy of operating state of terminal guidance radar due to inaccurate and incomplete signal in complex electromagnetic environment,a new method for real-time discrimination of operating state of terminal guidance radar in complex electromagnetic environment is proposed.A status breakpoint discrete method is used for discriminating.The samples with the same working state and similar eigenvalues are classified into one class by using this method,which makes the division of the discrete interval reasonable,and the anti-noise capability of the discrimination method be enhanced.A basic probability assignment(BPA)correction method based on incomplete information is also used in discrimination.In this method,the BPA output from support vector machine is corrected by using the similar correction factor,and the incomplete information is utilized without introducing human error.The simulated results show that the proposed method can improve the discrimination accuracy of operating state of terminal guidance radar.