基于均匀圆阵的空时二维波达方向估计算法  

Space-time 2-D DOA estimation algorithm based on uniform circular array

作　　者：张辉[1] 李晓明[1] 葛临东[2] 周立文 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077 [2]解放军信息工程大学信息工程学院,河南郑州450002 [3]兰州军区装备部,甘肃兰州730000

出　　处：《信号处理》2008年第5期766-769,共4页Journal of Signal Processing

摘　　要：提出了一种适合于均匀圆阵的空时二维波达方向估计方法,该方法先利用模式激励技术对接收数据进行变换,再利用变换后数据之间的互相关关系将数据进一步映射到空时域,然后构造出一对空时DOA矩阵束,通过矩阵束的广义特征值就能够计算出所有入射信号的方位角和俯仰角。该方法完全避免了DOA矩阵类方法中难以克服的角度兼并问题,与UCA- ESPRIT算法相比,减小了孔径损失,使能够估计的信号数目增加了一倍。该方法具有免搜索和参数自动配对的特点。仿真结果证明了该算法的性能。A space-time 2-D direction of arrival （DOA） estimation method was proposed based on uniform circular array. First, the mode excitation technique was used to transform the received data matrix. Second, the transformed data were mapped to space-time field according to the relationship among them and then a matrix pencil was derived. Third, the azimuth and elevation angles were estimated form the generalized eigenvalues of the matrix pencil. This method overcomes angle-ambiguity problem in DOA matrix method. The maximum number of incident sources that can be resolved is twice that of UCA-ESPRIT. It is a search-free method and the parameters can be paired automatically. Simulation results are presented to prove the performance.

关 键 词：均匀圆阵 二维波达方向 模式激励法 矩阵束 

分 类 号：TN957.51[电子电信—信号与信息处理] TP301.6[电子电信—信息与通信工程]