摘要
为解决在冲击噪声背景和相干信源条件下,高斯白噪声的相干信源DOA(Direction-Of-Arrival)估计算法失效的问题,提出了基于虚拟空间平滑共变系数矩阵(ROC-VSS:RObust Covariation-Based Virtual SpatialSmoothing)的DOA估计算法。该算法以虚拟空间平滑算法为基础,通过构建虚拟平滑共变系数矩阵实现相干信源条件下的DOA估计。构建的虚拟子阵阵元个数等于阵列总的阵元个数,避免了阵列孔径的损失。仿真实验表明,在冲击噪声背景和多径干扰条件下,算法能很好地估计信源的波达方向。
ROC-VSS(Robust Covariation-based Virtual Spatial Smoothing)algorithmic was put forward.The DOA(Direction-Of-Arrival)estimation of coherent sources in gauss white noise can not estimate the direction-of-arrival accurately in impulse noise,but the new algorithmic resolves this problem.The principle of this new algorithmic is combined the virtual spatial smoothing algorithmic with covariation coefficient matrix.The sensors of virtual subarrays designed in the new algorithmic is equal to the total sensors of array,so the new algorithmic has no loss of array aperture.Simulation results show that the new algorithmic does well in DOA estimation of coherent sources in impulse noise and the new algorithmic can find the direction-of-arrival accurately.
出处
《吉林大学学报(信息科学版)》
CAS
2011年第1期47-50,共4页
Journal of Jilin University(Information Science Edition)
关键词
DOA估计
虚拟空间平滑算法
阵列孔径
direction-of-arrival(DOA) estimation
virtual spatial smoothing(VSS) algorithm
array effective aperture
作者简介
姚林宏(1987-),男,四川广安人,空军航李大学硕士研究生,主要从事模式识别与信息处理研究,(Tel)86-431-86958047;15948330718(E-mail)yaolinhong2008@sina.com
高鹰(1963-),男,四川双流人,空年航空大学教授,硕士生导师,主要从事航空电子装备检测与维修研究,(Tel)86-13610703587(E-mail)gaoying1964@163.com