基于频域ICA的波达方向估计方法  

Method for estimation of DOA based on frequency domain ICA

作　　者：黄紧德[1] 李京华[2] 李行[1] 

机构地区：[1]广西教育学院数学与计算机科学系,广西南宁530023 [2]西北工业大学电子信息学院,陕西西安710072

出　　处：《计算机工程与设计》2012年第8期3277-3280,F0003,共5页Computer Engineering and Design

摘　　要：为降低阵元数目和提高相干多径入射信号的波达方向(DOA)估计精度。提出了一种基于频域独立分量分析与波束零点形成相结合的DOA估计方法。该方法综合利用阵列结构信息和目标信号的统计独立特性,与常规算法相比,降低了算法对阵元数目和精度的依赖,并能实现对相干多径入射信号的DOA估计。计算机仿真结果表明,该算法具有少阵元、收敛快、误差小的特点。To reduce the number of array elements and improve the directions of arrival estimation accuracy for the coherence multi-path incident signal. A new method for directions of arrival estimation is proposed, in which frequency domain independent component analysis and null beamforming are combined. The array of structural information and statistical independence properties of the target signal is used to the proposed method, compared wite the conventional algorithm the dependence on the number of array and the accuracy of the array manifold are reduced, and the coherence multi-path incident signal DOA estimation is achieved. Computer simulation results show that the algorithm has a small array elements, fast convergence and small error characteristics.

关 键 词：波达方向估计 频域独立分量分析 自然梯度算法 波束 阵列流型 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]