基于ESPRIT方法的近场源参数估计  

New ESPRIT approach to near-field source parameter estimation

作　　者：梁军利[1,2] 刘丁[1] 张军英[3] 

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048 [2]西安理工大学计算机科学与工程学院,陕西西安710048 [3]西安电子科技大学计算机学院,陕西西安710071

出　　处：《系统工程与电子技术》2009年第6期1299-1302,共4页Systems Engineering and Electronics

基　　金：西安理工大学科研启动基金和青年基金资助课题

摘　　要：提出了一种基于ESPRIT的近场窄带信源到达角及距离联合估计新方法。该方法选择特定序号阵元输出计算的四阶累积量构造高维矩阵,利用其特征值分解结果构造2个新的矩阵,再借助新构造矩阵的特征值联合估计信源参数。该方法无须参数配对,无须谱峰搜索;有效利用了阵列孔径,从而具有较高的估计精度。仿真结果表明算法是有效的。A new ESPRIT-based estimation algorithm is proposed, by means of which the directions-of-arrival （DOA） and ranges of multiple near-field sources is jointly estimated. Firstly, the proposed method constructs one high-dimensional matrix by virtue of the fourth-order cumulants of some properly chosen sensor outputs; secondly, performing the eigenvalue decomposition of this matrix, two new matrixes are formed, and from whose eigenvalues the source parameters are simultaneously obtained. The proposed algorithm requires neither pairing parameters nor search computation and can efficiently make use of the array aperture, thus having high estimation accuracy. Finally, simulation results verify the performance of the proposed method.

关 键 词：阵列信号处理 高阶累积量 旋转不变技术 

分 类 号：TN911.23[电子电信—通信与信息系统]