基于空间平滑处理的稳健宽带高分辨方位估计算法  

Robust wideband highresolution direction of arrival estimation based on spatial smoothing

作　　者：戴征坚[1] 李志舜[1] 

机构地区：[1]西北工业大学航海学院,西安710072

出　　处：《声学技术》2005年第4期250-253,共4页Technical Acoustics

摘　　要：实际系统中阵列误差导致的模型失配问题一直是高分辨方位估计技术走向实用化的一个瓶颈。相对于窄带信号,宽带信号阵列模型误差更加复杂和多样,通过建立宽带阵列信号误差模型,得出了基于空间平滑的稳健的宽带高分辨算法是一种抑制阵列误差的有效方法的结论,这种基于空间平滑的宽带高分辨算法,通过空间平滑后对各频率处不同子阵的互谱密度矩阵求和,一定程度上减弱了阵列误差的影响,具有较高的稳健性。本文结合消声水池试验,分析并验证了其效果。Applications of high-resolution Direction of arrival （DOA） estimation are limited by errors of the array model in real systems. This paper establishes a model of array manifold errors for wideband signals. Because the array errors of wideband signal is much more difficult than narrow band signal, high-resolution robust wideband DOA estimation method is very useful in real systems. A robust method based on spatial smoothing is presented for array errors in this paper. Experiments are carried out in a water tank for wideband array signals. The results show that the proposed method can be widely used in practice

关 键 词：宽带信号 高分辨 方位估计(DOA) 空间平滑 水池试验 

分 类 号：TN911[电子电信—通信与信息系统]