一种改进的全阵空间平滑技术  

Improved Spatial Smoothing Technique Using Full Array

作　　者：程小震[1] 唐宏[1] 付红卫[1] 梁路江[1] 

机构地区：[1]空军工程大学导弹学院,陕西三原713800

出　　处：《电讯技术》2010年第3期37-41,共5页Telecommunication Engineering

摘　　要：在处理相干信号源的方法上,传统的空间平滑方法如前后向平滑、加权前后向平滑等都是非常有效的方法。然而,已有的空间平滑算法在信噪比较低或相干源的波达方向角(DOA)相邻很近时无法精确估计,而且都必须以牺牲孔径为代价。因此当信号源数目较大时,传统的空间平滑方法是无效的。针对这些问题,提出了一种新的实相干信号的估计方法,在信噪比较低时仍可以准确估计邻近的相干源,而且没有孔径损失。仿真结果验证了该方法的优越性。In the context of coherent signal source, conventional spatial smoothing methods such as forward/ backward smoothing method, weighted forward/backward smoothing method can be used effectively. However, the currently known spatial smoothing algorithms not only are imperfect at low signal-to-noise ratio（SNR） or when the DOAs of coherent source are near, but also reduce effective aperture of the array. Especially the num- ber of coherent sources is large, conventional spatial smoothing methods are invalid. In view of these problems, a new method is proposed which can perform well at low SNR from near directions. Simulation results are provided to verify the superiority.

关 键 词：相干源 波达方向估计 空间平滑 

分 类 号：TN911.7[电子电信—通信与信息系统]