基于非圆信号的阵列扩展方法  

Array Extension Method Based on Non-circular Signal

作　　者：吴晨曦[1,2] 张旻[1,2] 王红军[1,2] 李歆昊[1,2] 

机构地区：[1]电子工程学院,合肥230037 [2]安徽省电子制约技术重点实验室,合肥230037

出　　处：《弹箭与制导学报》2014年第5期165-168,共4页Journal of Projectiles,Rockets,Missiles and Guidance

基　　金：国家自然科学基金(60972161)资助

摘　　要：提出了一种基于非圆信号的稀疏分解DOA估计方法,用于解决非圆信号数多于阵元数时的DOA估计问题。该方法首先利用非圆信号为实值信号的特点,用阵列上的接收数据及其共轭拼接构造一个新的扩展矩阵,选择扩展协方差矩阵的第一列作为稀疏分解向量,利用扩展阵列的导向矢量构造完备字典,建立了DOA估计的稀疏模型。仿真结果证明了该方法的可行性和有效性。A sparse decomposition method was proposed to estimate direction of arrival（ DOA） problem of non-circular sources. Firstly,a new output of extended array was concatenated with their conjugate component according to the properties of real value of non-circular signals. After that,select the first of the extended array as sparse decomposition vectors and create over-complete dictionary with extended steering vectors,a sparse DOA estimation model was constructed. The simulation results show feasibility and effectiveness of this method.

关 键 词：波达方向 非圆信号 阵列扩展 稀疏分解 

分 类 号：TN911.23[电子电信—通信与信息系统]