基于传播算子的二维ESPRIT算法  

A modified ESPRIT algorithm for DOA estimation based on the propagator

作　　者：姜晖[1] 单洁[1] 石敏[1] 

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710121

出　　处：《西安邮电学院学报》2013年第2期18-21,共4页Journal of Xi'an Institute of Posts and Telecommunications

基　　金：国家自然科学基金面上资助项目(61271292);陕西省自然科学基金资助项目(1090275)

摘　　要：为了提高经典参数估计旋转不变法(Estimation of signal parameters via rotational Invariance Technique,ESPRIT)处理数据的效率,提出基于传播算子的二维虚拟ESPRIT的改进算法。该算法通过构造一组虚拟阵列得到新的虚拟接收数据,利用传播算子将这组新数据与真实阵列得到的数据进行数据重构,从而得到噪声子空间避免特征值分解,最终可估计出用户的二维波达方向估计。理论分析表明,该方法的波达方向估计性能优于传统的ESPRIT方法,且降低了运算量,提高了阵列的利用率和算法的抗干扰能力,最后由计算机仿真实验证明此方法的有效性。In order to improve the efficiency of the data processing, this paper presents a VE- SPRIT-TSM method based on the propagator algorithm. This method uses two row uniform line- ar arrays to construct the new virtual array and to obtain the new data, which improve the utiliza- tion of the array. Then this method uses the propagator to processing the data matrix, which is composed of the new data and the origin data, to construct the noise subspace without eigenvalue decomposition. In the end, 2-D DOA is estimated by this method. It proves to be of the same es- timation results but lower error than that using the original algorithm in theory. Its effectiveness can be proved by computer simulations.

关 键 词：传播算子 特征分解 虚拟阵列 二维ESPRIT算法 

分 类 号：TN911.7[电子电信—通信与信息系统]