双重不变ESPRIT  

DUAL INVARIANCE ESPRIT

作　　者：刘全[1] 雍玲[1] 张尔扬[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《电子与信息学报》2003年第3期340-344,共5页Journal of Electronics & Information Technology

摘　　要：ESPRIT利用了阵列在一个方向上的平移不变性,从而可估计信号的一个方向。该文利用3个相互位移的子阵列所具有的双重不变性质,从而估计出了信号的两个方向,并且计算量较小,两个方向角自然配对,对子阵列的内部结构也没有要求,因此可以选择适当的子阵列结构以获得良好的估计效果。ESPRIT can estimate one direction of signals utilizing a single shift-invariance property of the sensor array. A novel method, i.e. dual-invariance ESPRIT, is proposed in the paper which can estimate two directions of incident signals utilizing two shift-invariance properties of a special sensor array which consists of three shifted subarrays. The new method is very fast and can get naturally paired direction estimates. What is more, the subarray geometry is arbitrary so that accurate estimates can be obtained by using an appropriate subarray geometry.

关 键 词：双重不变 ESPRIT 波达方向估计 平移不变性 

分 类 号：TN911.23[电子电信—通信与信息系统]