传播算子方法在宽带DOA估计中的应用  

Application of propagator method in wideband direction-of-arrival estimation

作　　者：于红旗[1] 刘剑[1] 黄知涛[1] 周一宇[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《航天电子对抗》2008年第2期43-46,共4页Aerospace Electronic Warfare

基　　金：国家自然科学基金资助项目(60502040)

摘　　要：将传播算子与宽带相干信号子空间方法相结合,推导了基于传播算子的宽带相干信号子空间方法,该方法所构造的聚焦矩阵不需要奇异值分解,在获取噪声子空间时不需要特征值分解,因而大大降低了运算量。比较了双边变换(TCT)方法与所推导的方法在分辨两个相邻较近信号源时的性能,仿真表明,在高信噪比时,该方法性能与TCT方法相近。A new DOA estimation algorithm for wideband sources is introduced. The method is based on the combination of propagator method and coherent signal subspace method. The focusing matrix of the new method needn＇t singular value decomposition. When getting noise subspace, the new method needn＇t eigenvalue decomposition. The method for resolving two closely spaced sources is compared with the two-sided correlation transformation （TCT） method. Simulation results demonstrate the performance of the method is near that of TCT under high SNR.

关 键 词：阵列信号处理 波达方向估计 宽带信号 相干信号子空间方法 传播算子方法 

分 类 号：TN911.23[电子电信—通信与信息系统]