四阶累积量的MUSIC算法在海流测向中的应用  

Application of FO-MUSIC Algorithms to Direction-Finding of Ocean Current

作　　者：董晓辉[1] 柯亨玉[1] 董志飞[1] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2004年第3期370-374,共5页Journal of Wuhan University:Natural Science Edition

基　　金：国家863项目资助(2002AA639170);教育部重点项目资助(01114)

摘　　要：针对高频地波雷达系统OSMAR2000海流测向中海流元数不易估计的问题,利用四阶谱累积量MU SIC算法的空间谱结构特点,采用试探法确定信号源数并估计信号源的位置.通过对模拟海流和实测数据的处理实验表明,利用该算法可以较准确地估计出海流元的个数和方位,并且比传统MUSIC方法获得更小的角度估计方差,有效地反演了海洋表面流信息.Due to the difficultness of estimating signal numbers of ocean current for HF ground wave radar OSMAR2000, an algorithm is put forward to estimate both signal numbers and signal directions by using the characteristic of fourth-order cumulant MUSIC algorithm. This algorithm estimates signal numbers and its position by trial and error method. After analysing the results, it is apparent that this method is an effective way to estimate both signal numbers and directions of ocean current.

关 键 词：高频地波雷达 四阶累积量 多重信号分类法 

分 类 号：TN911.72[电子电信—通信与信息系统]