文档介绍：2006 年 1 月系统工程与电子技术 Jan. 2006
第 28 卷第 1 期 Aerospace Electronics Information Engineering and Control Vol. 28 No. 1
文章编号: 1001-506X(2006) 01-0034-03
伪波束域四阶累积量切片高分辨方位估计法
周印龙, 冯西安
( 西北工业大学航海学院, 陕西西安 710072)
摘要: 在低信噪比或空间非白噪声情况下, 基于信号二阶统计量的高分辨方法, 性能变差较快。在基于四
阶累积量切片 M USIC 方法的基础上, 结合波束域高分辨方法的思想, 提出了一种四阶累积量切片伪波束域高分
辨方位估计方法。分析表明, 高阶累积量的运用有效抑制了空间高斯白噪声和有色噪声; 波束域方法的运用有效
滤除了部分空间噪声, 增强了方法的稳健性。仿真结果表明, 相比基于四阶累积量切片的 MU SIC 方法, 所提出的
方法在高斯白噪声和有色噪声中, 有效提高了低信噪比情况下的方位估计精度, 降低了目标的分辨门限。
关键词: 方位估计; 高分辨; 四阶累积量切片; 伪波束域
中图分类号: TN911. 7 文献标识码: A
High resolution method of DOA estimation based on the 4th-order
cumulant slice in pseudo beam space
ZHOU Yin-long , FENG X-i an
( Coll. of Marine, Northw estern Polytechnical Univ . , X i. an 710072 , China)
Abstract: In low signa-l to-noise ratio ( SNR) or colored spatial noise, performances of high resolution methods based on
the second-order statistics e worse rapidly. Based on the study on the 4th-order cumulant slice MUSIC and the idea of
high resolution methods in beam space, a high resolution method of DOA estimation based on the 4th-order cumulant slice in
pseudo beam space is derived. Analytic results show that, by using the higher-order cumulant, white spatial Gaussian noise and
colored spatial Gaussian noise can be restrained effectively and with beam space method, part of spatial noise can be filtered and
the r