无须阵列校准的一种来波方向估计算法  

A method of target' DOA estimation without array-calibration

作　　者：钟志峰[1] 文必洋[2] 潘永才[1] 

机构地区：[1]湖北大学物理与电子工程学院,湖北武汉430062 [2]武汉大学电子信息学院,湖北武汉430072

出　　处：《华中科技大学学报（自然科学版）》2008年第2期99-103,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家高技术研究发展计划资助项目(2001AA631050)

摘　　要：针对高频地波雷达回波信号的特点,提出了一种基于4阶累积量的阵列无源校正的方法.利用海面上检测到的点目标的一维远场窄带信息构建虚拟DOA(direction of arrival)矩阵,利用冗余信息在低信噪比、短数据情况下进行高分辨阵列测向.该算法利用方程组求解,而不需搜索最优解,极大减少了计算量,便于实时跟踪.同时在处理阵列测向问题时,具有抗噪能力强、阵列孔径扩展和对DOA估计的选择性等功能.实验结果证明:在低信噪比和短数据的情况下,该方法具有可行性和工程应用性.According to the characteristic of echo signals of high frequency ground wave radar, a novel method of calculating target＇s direction of arrival （DOA） without array-calibration which based on a two-rows linear array is proposed in this paper. Making full use of redundancy information. The method construct virtual DOA matrix using one-dimensional narrow band signal. This algorithm uses the information from both eigenvales and eigenvectors and employs the high-order cumulant for processing array signals against the Gaussian noise. Futhermore, it can calculate target＇ DOA though the method of resolving equations with low signal to noise ratio （SNR） echoes and short data series ,and does not need to search optimal results and match parameter. On the end of this paper, experiments show the validity of this method and the applicability for practical projects.

关 键 词：高频地波雷达 高阶累积量 阵列信号处理 到达角 

分 类 号：TN911.72[电子电信—通信与信息系统]