一种新的基于线性变换波达方向估计算法  

A New Linear Transformation Method for Direction of Arrival Estimation

作　　者：方燕[1] 罗朗[1] 

机构地区：[1]电子科技大学中山学院,广东中山528402

出　　处：《信号处理》2009年第4期622-624,共3页Journal of Signal Processing

基　　金：电子科技大学中山学院青年项目基金资助;项目号:2006y02.

摘　　要：本文提出了一种基于线性变换的波达方向估计算法。与一般的基于无需特征分解的线性变换方法不同,本文假设并利用了噪声的时间相关长度小于信号的时间相关长度这一性质来消除噪声的影响,然后利用阵列的旋转不变特性直接估计波达方向而无需进行谱峰搜索或计算多项式的根。仿真实验也表明了本算法的去噪性能即在低信噪比时比传统的线性变换算法具有更好的统计性能。This paper investigates an alternative linear transformation method for source bearing estimation. Unlike the traditional methods based on the linear operator, our proposed method eliminates the effect of additive noise under the assumption that the tem- poral-correlation length of the noise field is shorter than that of the signals and then the angles are obtained by exploiting the shift invari- ance property of the array geometry without searching peaks or calculating the roots of a certain polynomial. The simulation results show that our proposed method is superior to the traditional linear transformation method in estimation performance at low SNR and eliminates the effect of additive noise.

关 键 词：线性变换 波达方向 无需特征分解 

分 类 号：TN911.23[电子电信—通信与信息系统]