基于最小冗余线阵的二维传播算子DOA估计  

Propagator method for two-dimensional DOA estimation based on minimum redundancy linear array

作　　者：赵大勇[1,2] 陈超[1] 刁鸣[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001 [2]空军通信导航与指挥自动化研究所,北京100085

出　　处：《系统工程与电子技术》2011年第4期724-727,共4页Systems Engineering and Electronics

基　　金：黑龙江省科技攻关项目(GZ08A101)资助课题

摘　　要：针对二维DOA(direction of arrival)估计所需阵元数量较多且阵元利用率较低的问题,提出了一种低阵元冗余度的阵列模型,将最小冗余线阵的应用拓展到二维DOA估计领域,降低了阵列冗余度。同时,利用传播算子算法估计二维波达方向,该算法无需谱峰搜索,且避免了大矩阵的特征分解,在解决计算量问题上有着巨大优势。最小冗余线阵的设置方式,用较少的阵元获得了较大的阵列有效孔径,从而弥补了传播算子算法在低信噪比条件下性能下降的缺点,具有了更好的低信噪比适应能力。该文从理论上论证了三平行最小冗余线阵设置的合理性,仿真实验证明了该方法的有效性。In order to overcome the low sensor utilization rate problem existing in most two-dimensional direction of arrival（DOA） estimation algorithms,a new array model with low array redundancy is proposed.Therefore,the application of minimum redundancy linear array（MRLA） is extended to two-dimensional DOA estimation.Meanwhile,two-dimensional spectral peak searching and eigen-decomposition of the large matrix are avoided by using a propagator method.The computational complexity is greatly reduced.The larger array effective aperture is obtained by using MRLA,so the performance of DOA estimation in the poor environment with low signal to noise ratio（SNR） is obviously improved.Simulation results show the superiority of this proposed method in precision.

关 键 词：阵列信号处理 二维DOA估计 最小冗余线阵 传播算子算法 

分 类 号：TN911.7[电子电信—通信与信息系统]