一种LPI雷达宽带信号DOA估计算法  

A DOA Estimation Algorithm for Design of Wide-band LPI Radar Signal

作　　者：梁森[1] 李勇[1] 郝亮飞[1] 

机构地区：[1]西北工业大学电子信息学院,西安710129

出　　处：《火力与指挥控制》2010年第12期107-109,共3页Fire Control & Command Control

摘　　要：宽带低辐射信号的设计是低截获概率(LPI,Low Probability of Intercept)雷达的关键技术之一。但传统的波达方向(DOA,Direction of Arrival)估计算法主要是针对窄带信号设计的,应用在LPI雷达中会制约雷达的测向性能。重点研究一种宽带信号DOA估计的方法。该方法的关键在于通过直接分解数据协方差矩阵,来构造聚焦矩阵。此外,还从LPI雷达工程应用的角度分析了该方法的性能指标,并用MATLAB进行了仿真,仿真结果表明该方法具有较高的分辨力和较低的算法复杂度,同时也验证了该算法在LPI雷达上的实用性。One of the key technologies of LPI（Low Probability of Intercept）radar is to design wide-band and low power signals.The traditional methods of DOA estimation are applied to narrow-band signals,which will have greatly restricted the capability of LPI radar in DOA estimation.This paper mainly introduces a method for wide-band DOA estimation,which directly decomposes the covariance matrix of the received data to get the focus-matrix.Besides,this paper analyses its performances from the point of it being used in LPI radar.Finally,according to the simulation of MATLAB software,the results show that the algorithm has higher resolution,lower implementation complexity and better practicality.

关 键 词：低截获概率雷达 宽带信号 波达方向 

分 类 号：TN974[电子电信—信号与信息处理]