用均匀圆阵实现宽频段来波信号频率和二维角估计  

REAL-TIME FREQUENCY AND 2D ANGLE ESTIMATION OF WIDE FREQUENCY BAND SIGNALS WITH UNIFORM CIRCULAR ARRAYS

作　　者：斯德谊[1] 乐强[1] 沈士团[1] 周荫清[1] 

机构地区：[1]北京航空航天大学电子工程系,北京100083

出　　处：《电子科学学刊》1999年第3期302-306,共5页

基　　金：国防预研科学基金;航空部九五预研课题

摘　　要：本文提出了一种在DFT波束空间实时估计入射到均匀圆阵(UCA)上宽频段(1～18GHz)信号的频率、方位角和仰角的方法。该方法可在时间欠采样条件下实现频率无模糊估计,在空间欠采样条件下,用整数搜索法实现方位角和仰角无模糊估计,且频率、方位角和仰角估计可自动配对。模拟频率间接估计算法的估计方差比直接估计算法的方差要小2～3个数量级。仿真实验表明了算法是有效的。A method is presented for real-time estimation of the frequency, azimuth and elevation angles of the signal incident on uniform circular arrays(UCA) over a very wide frequency band(1~18GHz) in DFT beamspace. The method provides unambiguous frequency estimation under temporal undersampling and unambiguous azimuth and elevation estimation using integer search algorithm under spatial undersampling. The estimations of azimuth and elevation angles are automatically paired with corresponding frequency estimates. The variance of the frequency estimates of indirect method is 2~3 magnitudes less than that of the direct method. Simulations are presented demonstrating the capabilities of the method.

关 键 词：宽频段信号 二维角估计 均匀圆阵 电子对抗 

分 类 号：TN911.7[电子电信—通信与信息系统] TN97[电子电信—信息与通信工程]