冲击噪声环境中的联合对角化波达方向矩阵法  

Joint diagonalization DOA matrix method in impulsive noise environments

作　　者：夏铁骑[1] 万群[1] 游志军[2] 汪学刚[1] 

机构地区：[1]电子科技大学电子工程系,四川成都610054 [2]海军驻西南电子设备研究所军事代表室,四川成都610036

出　　处：《电波科学学报》2008年第3期460-465,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金(No.60372022);新世纪优秀人才支持计划(NCET-05-0806)

摘　　要：针对对称α平稳(SαS)噪声环境中信号源的高分辨二维波达方向(DOA)估计问题,提出了一种新的联合对角化(JD)分数低阶矩(FLOM)-DOA矩阵方法。构建了一种特殊的阵列结构,把其分为三个子阵,然后通过联合对角化获得信号的二维角估计。新方法不仅保持原协变异DOA矩阵方法无需二维谱峰搜索和参数配对等优点,还较好地解决了一维角度兼并问题。仿真结果表明,新方法优于协变异DOA矩阵法。A novel joint diagonalization fractional lower order moment （FLOM） DOA matrix method is proposed to estimate the higher 2-D DOA of uncorrelated narrowband signals with high resolution in the presence of impulsive noise. The method constructs three subarrays by exploiting the special structure of the array, thereby obtains the two-dimensional （2-D） DOA of the array based on joint diago- nalization directly with neither peak search nor pair matching. The new method can handle sources with common 1-D angles. Simulation results show that the proposed method yields better performance than the robust covariation DOA matrix method.

关 键 词：波达方向 分数低阶矩 冲击噪声 联合对角化 

分 类 号：TN911[电子电信—通信与信息系统]