估计信号到达角的一种快速算法  

A Rapid Approach to Direction of Arrival Estimation

作　　者：杨涛[1] 郭青[1] 张浩[1] 

机构地区：[1]西安电子科技大学电子工程学院,西安710071

出　　处：《无线通信技术》2008年第1期42-45,49,共5页Wireless Communication Technology

摘　　要：通过充分考虑相干信号源以及其回波的各个特性,本文首先提出了适合其特性的信号模型,并以此为基础对信号的某些特性进行深入分析,进而提出了基于FFT的对阵列信号到达角进行估计的快速算法。模拟仿真结果表明,在多个相干信源的前提下,本文提出的对信号到达角进行快速估计的算法是切实可行的,尤其适合在低信噪比和实时场合下使用。Taken ample characters of coherent signal sources and their echoes, firstly a proper signal model is proposed. Based on the model, further analysis to properties of coherent signal sources is made, and a rapid DOA estimating algorithm employing FFT has been proposed. The result has showed that the proposed algorithm is feasible in the situation that there are many coherent signal sources, especially in low SNR environment or in actually happening situations.

关 键 词：码分多址 智能天线阵列 信号到达角 快速傅立叶变换 

分 类 号：TN929.5[电子电信—通信与信息系统]