摘要
总结了宽带信号子空间类DOA估计方法,提出了一种新的构造聚焦矩阵的方法,新方法基于预估角度和宽带信号带宽内各个频点上对应的阵列流形的奇异值分解,所构造的聚焦矩阵为酉矩阵,在聚焦过程中没有聚集损失。比较了新方法与旋转信号子空间方法(RSS)在分辨两个相邻较近信号源时的性能,新方法与RSS方法性能相当。仿真结果证明了算法的有效性。
A new DOA estimation algorithm for wideband sources is introduced. The method is based on the singular value decomposition of the array manifold of every frequency in the signal bandwidth and the preliminary DOA estimation. The focusing matrix is unitary matrix, thus there is no focusing loss in the new algorithm. The capability of the method for resolving two closely spaced sources is compared with that of the Rotational Signal-Subspace （RSS） method. The performance for the new technique is similar with that for RSS. Simulation results demonstrate the effectiveness of the method.
出处
《电子信息对抗技术》
2008年第2期6-9,25,共5页
Electronic Information Warfare Technology
基金
国家自然科学基金资助项目(60502040)
关键词
阵列信号处理
波达方向估计
宽带信号
宽带相干处理方法
array signal processing
direction-of-arrival estimation
wideband sources
coherent signal subspace method
