一种新的宽带信号源数目快速估计方法  

A Novel Method for Fast Estimating the Number of Wideband Sources

作　　者：张恒利[1] 赵拥军[1,2] 张培峰[1] 

机构地区：[1]信息工程大学信息工程学院,河南郑州450002 [2]北京理工大学信息科学技术学院,北京100081

出　　处：《信号处理》2009年第4期567-570,共4页Journal of Signal Processing

摘　　要：信号源数目估计是波达方向(DOA)估计的基础。基于两个子阵接收数据的信号子空间的旋转不变性,利用Lanczos方法来求解多级维纳滤波器的匹配滤波器组,即子阵的信号子空间,本文提出了一种新的宽带信号源数目快速估计方法。该方法不需要计算协方差矩阵或对其进行特征值分解,避免了特征值分解的大运算量。最后通过计算机仿真验证了本文方法的有效性和优越性。When estimating the direction-of-arrival （DOA） of wideband sources, the determination of the number of signals is foundational. Based on the rotational invariance property between two identical subarrays, using the Lanczos algorithm to estimate the signal subspace, a new method for estimating the number of wideband sources is proposed in this paper. The new method does not require an estimate of the covariance matrix or its eigen-decomposition, so the complexity is greatly decreased. The computer simulations show the availability and efficacy of the method.

关 键 词：宽带信号 信号源数目估计 多级维纳滤波器 

分 类 号：TN911.72[电子电信—通信与信息系统]