基于非圆信号的二维测向算法  

2-D direction-of-arrival estimation of non-circular sources

作　　者：彭晓燕[1] 甘露[1] 魏平[1] 

机构地区：[1]电子科技大学电子工程学院,四川成都610054

出　　处：《电波科学学报》2009年第2期302-306,310,共6页Chinese Journal of Radio Science

基　　金：新世纪优秀人才支持计划(NCET-05-0803)

摘　　要：提出了一种基于窄带非圆信号的二维测向算法,利用非圆信号的椭圆协方差矩阵非零特性将阵列有效阵元数和孔径同时扩展,提高多信号检测的能力。进一步通过利用L阵的几何性质和两子阵间的互相关来滤除噪声,提高角度估计精度,并采用快速算法获得信号方位角和俯仰角。最后计算机仿真结果验证了该方法由于利用非圆信号特性比传统测向算法的估计性能更高。A novel algorithm to estimate two-dimensional（2-D）direction-of-arrival （DOA）of narrowband non-circular signal impinging on L-shape array（LA）is proposed. The proposed method makes use of nonzero elliptic covariance matrix of non-circular signal to increase the numbers of sensor and expand effective aperture size. It can deal with the more sources than common method. And the proposed method exploits L-shape array geometry and the cross-correlation information among the subarray. By fast computation of cross-correlation matrix, the azimuth and elevation angle can be got. The computer simulation has proved that the proposed algorithm has good performance.

关 键 词：阵列信号处理 非圆信号 二维测向 

分 类 号：TN911.23[电子电信—通信与信息系统]