一种基于有向均匀圆阵的宽带波束形成方法  

A wideband beamforming method based on directional uniform circular arrays

作　　者：穆鹏程[1] 殷勤业[1] 张建国[1] 

机构地区：[1]西安交通大学智能网络与网络安全教育部重点实验室,电子与信息工程学院,西安710049

出　　处：《中国科学：信息科学》2011年第2期246-256,共11页Scientia Sinica(Informationis)

基　　金：国家自然科学基金(批准号:60971113,61071125)资助项目

摘　　要：本文提出一种基于有向均匀圆阵解决宽带波束形成问题的新方法,其基本思想是针对某一特定频率设计窄带波束形成空域滤波器,并把得到的滤波器权值直接应用于宽带信号以降低设计和处理的复杂度.在已知信号方向信息的前提下,使用线性约束的最小二乘法设计窄带空域滤波器,而有向均匀圆阵对频率变化不敏感的特性可以保证使用同一组空域滤波器权值在宽带信号所包含的不同频率上形成一致的波束与陷波点.所提出的宽带波束形成方法可以显著降低阵列信号处理时的运算复杂度,便于进行实时信号处理.A new method for solving the wideband beamforming problem is proposed in this paper based on directional uniform circular arrays.The basic idea is designing a narrowband beamforming spatial filter at a specific frequency and using the obtained filter weights directly to wideband signals,which reduces the complexities of designing and processing.Under the premise of knowing signals＇ direction information,this paper uses the method of least square with linear constraints to design the narrowband spatial filter.Since the directional uniform circular array is insensitive to the variation of frequency,coincident beams and notches are obtained at different frequencies of the wideband signal by using the obtained narrowband spatial filter weights.The computation complexity of array signal processing can be greatly reduced by using the method proposed in this paper,which is convenient for real-time signal processing.

关 键 词：阵列信号处理 宽带波束形成 均匀圆阵 空域滤波 最小二乘 

分 类 号：TN911.7[电子电信—通信与信息系统]