基于虚拟旋转不变技术的宽带信号二维到达角估计  

Two-dimensional direction of arrival estimation of wideband signals based on virtual rotational invariance techniques

作　　者：龚文斌[1] 黄可生[1] 

机构地区：[1]长沙理工大学计算机与通信工程学院,湖南长沙410076

出　　处：《信号处理》2008年第2期286-289,共4页Journal of Signal Processing

摘　　要：在相关信号子空间方法的基础上,本文提出了一种阵列宽带信号二维角度的估计方法。该方法首先利用虚拟互相关计算方法得到阵列输出的协方差矩阵,并构造出两个子阵(实际子阵和虚拟子阵);然后采用投影算子来形成聚焦矩阵,最后对聚焦后的协方差矩阵采用ESPRIT方法估计出宽带信号的二维到达角。这种方法能抑制非高斯噪声对算法的影响,并能扩展阵列孔径,且不需要进行角度预估计;估计出的二维角度能自动配对,提高了算法的实现速度。计算机仿真试验证实了该算法的有效性。Based on the coherent signal-subspace method （ CSM）, a two-dimensional DOA estimating method of wideband signals has been proposed. At first, used virtual cross-correlation computation （VC3） to form array output covariance matrix, and constructed two sub-arrays （true and virtual sub-array） ;then used the projector operator to form focusing matrix,and at final used ESPRIT method to estimate the two-dimensional broadband signal arrival angle. This method can inhibit non-Gaussian noise impact on the algorithm,and can be extended array aperture, and does not require pre-angle estimates. The two-dimensional angles can be matched automatically. This can improve the speed of the algorithm. Computer simulation confirms the methods availability.

关 键 词：虚拟互相关计算 宽带信号 二维到达角 

分 类 号：TN911.23[电子电信—通信与信息系统] TN911.7[电子电信—信息与通信工程]