基于小波变换的智能天线波达方向估计研究  

Research of smart antennas DOA estimation based on wavelet transformer

作　　者：李娜[1,2] 殷兴辉[2] 高文昀[2] 

机构地区：[1]宿州学院机械与电子工程学院,安徽宿州234000 [2]河海大学计算机与信息学院,南京211100

出　　处：《华东师范大学学报（自然科学版）》2016年第6期166-172,共7页Journal of East China Normal University(Natural Science)

基　　金：国家自然科学基金(11173010;U1531101)

摘　　要：对比两种经典的智能天线波达方向(Direction of Arrival,DOA)估计算法——延迟-相加算法、多重信号分类(Multiple SignalClassification,MUSIC)算法,提出了一种基于小波变换的智能天线波达方向估计算法(Smart Antennas Direction of Arrival Eseimation Based on Wavelet Transformer,SADOAWT),该算法利用小波变换,将来波信号变换在多尺度频域,针对不同频域采用不同算法以实现分辨率、计算复杂度的高度兼顾.计算机仿真结果表明,新算法复杂度较低,克服了延迟-相加算法分辨率低、副瓣较多的缺点,避免了MUSIC算法遇到相关信号分辨率降低的问题.Having compared two classic smart antenna DOA （Direction of Arrival, DOA） estimation algorithm--delay-sum algorithm, multiple signal classification （MUSIC） algorithm, smart antennas direction of arrival estimation based on wavelet transformer （SADOAWT） algorithm has been proposed. Taking into account the computational complexity and convergence rate, the algorithm converts signal into multiple scales domain, while different frequency domain would use different algorithms. Simulation results show that the computational complexity of new algorithm is low. SADOAWT overcomes the disadvantages of delay-sum algorithm which has low resolution and many sidelobes, it also avoids the problem that resolution of MUSIC algorithm gets reduced while correlated signal coming.

关 键 词：波达方向估计 延迟-相加算法 多重信号分类算法 小波变换 

分 类 号：TN919.3[电子电信—通信与信息系统]