基于四阶累积量扩展孔径的线阵设计  

Design of linear array with augmented aperture based on fourth-order cumulant

作　　者：刘学斌[1] 韦岗[1] 季飞[1] 

机构地区：[1]华南理工大学电子与信息学院,广东广州510640

出　　处：《电波科学学报》2006年第1期126-130,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金(60101002);国家教委博士点基金(20010561007)

摘　　要：阵列孔径越大,空间谱分辨率越高。在借鉴传统的约束最小冗余线阵概念的基础上,从阵列输出的四阶累积量定义出发,利用四阶累积量扩展阵列孔径的功能,设计出基于四阶累积量的约束最小冗余线阵。与相同阵元数的传统约束最小冗余线阵相比,它具有大得多的有效孔径,从而在运用四阶累积量DOA估计方法时可大大增加可估计的信号数,极大地提高DOA估计分辨率。仿真结果证明了结论。Larger aperture leads to higher resolution of DOA estimation for an array with given sensors. A so-called restricted minimum redundancy linear array based on fourth-order cumulant （Cum-RMRLA） is designed according to the definition of fourth-order cumulant of array outputs. Owing to four-order cumulant＇s capability of expanding array aperture, Cum-RMRLA can obtain much larger aperture than conventional RMRLA of equivalent sensors, thus it can estimate much more signals and achieve greatly higher resolution with DOA estimation method based on fourorder cumulant. Exoerimental result confirms the conclusion.

关 键 词：波达方向估计 约束最小冗余线阵 四阶累积量 

分 类 号：TN911.7[电子电信—通信与信息系统]