【作者】 徐友根； 刘志文；

【Author】 XU You-gen,LIU Zhi-wen Department of Electronic Engineering,Beijing Institute of Technology,Beijing 100081,China

【机构】 北京理工大学电子工程系；

【摘要】 论文研究了波前畸变条件下基于矢量阵列的波达方向估计方法由于传输媒质的不理想,对于稀疏矢量阵列而言,矢量传感器间的信号包络相关性明显减弱甚至消失,此时理论上无法利用空间相位信息获得信号波达方向估计:传感器间的空间旋转不变性也同时遭到破坏,使得一些子空间算法无法应用利用非圆信号相关矩和共轭相关矩共存这一冗余信息给出了一种可融合所有传感器微观信息并对色噪声不敏感的信号波达方向估计算法,该方法主要基于联合对角化技术,实验表明其对幅度畸变问题不甚敏感更多还原

【Abstract】 This paper addresses the problem of two-dimensional Direction-Of-Arrival(2D DOA) estimation in the presence of distorted waveiront by using a vector array.For a sparse vector array,the amplitude and phase of wavefront along different sensors generally become randomly varied because of inhomogeneous propagation medium.As a result,the spatial information is no longer sufficient for DOA estimation/The imperfect spatial coherence also destroys the rotational invariance structure required by some subspace-based DOA estimators.The redundancy in nonvanishing conjugate moments of noncircular signals is herein exploited to derive a very simple DOA estimator that is immune to spatial coherence loss and colored noise.The method is mainly based on joint diagonalization technique and is shown to be robust to amplitude distortion.更多还原