累量域二维波达方向估计方法  

New Cumulant Based Method for 2-D DOAs Estimation

作　　者：夏铁骑[1] 汪学刚[1] 郑毅[1] 

机构地区：[1]电子科技大学电子工程学院,成都610054

出　　处：《电子科技大学学报》2008年第6期840-843,共4页Journal of University of Electronic Science and Technology of China

基　　金：国家自然科学基金(60372022);新世纪优秀人才支持计划(NCET-05-0806)

摘　　要：提出了一种新的适合任意高斯噪声环境的高分辨二维波达方向(DOA)估计方法——联合对角化4阶累积量-DOA矩阵方法。该方法以阵列的特殊结构为基础,利用四阶累积量构建3个子阵,采用联合对角化技术获得信号的二维角估计,适用于存在一维角度兼并的情况,且无需二维谱峰搜索和参数配对,从而避免了配对算法在低信噪比、小角间距或者复杂的信号传播环境下所带来的弊端。仿真结果证明了该方法的有效性。A novel joint diagonalization fourth-order cumulants DOA matrix method is proposed to estimate the higher 2-D DOAs of uncorrelated narrowband signals in arbitrary Gaussian noise environments. Based on the special structure of the array, the method constructs three subarrays by exploiting fourth-order cumutants, thereby obtaining the 2-D DOAs of the array based on joint diagonalization with neither peak searching nor pair matching. The new method can handle sources with common 1-D angles and remedy the disadvantages of the methods employing pair matching in the case of low SNR, environments. Simulation results show the effectiveness small angular separation, and other severe propagation of the method.

关 键 词：阵列天线 波达方向 4阶累积量 联合对角化 

分 类 号：TN911[电子电信—通信与信息系统]