一种基于均匀圆形阵的宽带相干信号二维波达方向估计方法  

2-D DOA estimating method of coherent wideband signals based on uniform circular array

作　　者：钟诚[1] 何培宇[1] 卜爱华[1] 余晶鑫[1] 周觅[1] 

机构地区：[1]四川大学电子信息学院,成都610064

出　　处：《四川大学学报（自然科学版）》2008年第3期563-567,共5页Journal of Sichuan University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(60472096)

摘　　要：提出一种宽带相干信号方位角与仰角二维波达方向估计方法.该方法利用相干信号子空间法对带宽内各个频点的信号子空间进行聚焦,然后用均匀圆形阵建立数学模型,来进行二维波达方向的估计.仿真实验结果验证了方法的有效性.同时研究了信噪比,快拍数,相对带宽对方向估计误差的影响.此外,与现行的方法相比具有较小的计算复杂度.An azimuth and elevation 2-D direction of arrival （DOA） estimating method of coherent wideband signals is proposed. The signal subspace of each frequency point in bandwidth is focused by the coherent signal subspace approach. Then a mathematical model based on a uniform circular array is established to estimate 2- D direction of arrival. Simulation results verify the effectiveness of the proposed method. At the same time, the influences of signal to noise ratio （SNR）, snapshots and relative bandwidth on DOA estimation error are investigated by experiment. In addition, compared with some current relevant methods, the proposed method has lower computational complexity.

关 键 词：宽带信号 聚焦矩阵 波达方向 均匀圆形阵 

分 类 号：TN911.7[电子电信—通信与信息系统]