【摘要】 现代雷达为提高自身工作性能及对抗干扰大多数采用捷变频技术.针对无源探测系统难以对捷变频信号的波达方向(DOA)进行精确估计的问题,文章提出了一种对多个捷变频雷达目标波达方向进行同时估计的方法.该算法通过对阵列接收信号数据预处理,将捷变频信号的频率变换到统一的参考频率,建立了对应于同一频率的导向矢量结构.进而得到单一参考频率的组合信号子空间,可实现对多部捷变频雷达信号波达方向的同时估计.该算法计算量小、速度快,易于实时处理.计算机仿真结果证明了所提算法的有效性.更多还原

【Abstract】 The technique of frequency agility has been applied in modern radar systems for improvement of the detection performance and compression of interferences.This paper presented a method of estimating direction of arrival(DOA) of multiple frequency agility radar signals simultaneously for a passive detection system.The method transformed the various agility frequencies into reference frequencies after pre-processing the data received by the array.Thus,the steering vectors of single frequency were constructed.Furthermore,a single frequency combined subspace of multiple frequency agility radar signals could be obtained for realization of high-resolution DOA estimation.The method has characteristics of a low computation load for real-time processing.The algorithm was presented in detail and follows simulation examples which proved the effectiveness of the algorithm.更多还原