摘要
针对现有的虚拟天线无法抑制落在变换区域之外的突发干扰的问题,提出了基于流形长度虚拟天线波束形成方法,新构造的虚拟阵列流形具有范德蒙德结构,可以应用子空间类算法;且流形长度变化率与实际流形长度变化率相等,允许在整个实际阵列扫描区域进行内插变换并使误差很小,避免了干扰落在变换区域外的情况.在这种虚拟天线上应用最小方差无畸变响应(minimum variance distortionless response,MVDR)波束形成方法,计算机仿真结果表明,在突发干扰处仍然能够形成零点,主瓣对准期望信号方向,在电磁环境变化剧烈的场合可以有效工作.
The arc length based virtual antenna beam forming method is proposed in this paper,for the purpose of overcoming the issue of the burst interference lying out of transformation areas that cannot be inhibited by utilizing the existing virtual antenna technique.The new virtual array is constructed with Vandermonde manifold to apply subspace approaches,and simultaneously its arc length change rate is equal to that of the real array.This can ensure the interpolation within the whole real array scanning area and a fairly minor transformation error,avoiding the situation the interference lies out of interpolation area.By employing the minimum variance distortionless response（MVDR） beam forming method on this virtual antenna array,the computer simulation results show that the nulls can also be generated in the burst interference directions,and the main lobe points to the desired signal direction.The conclusion indicates the method presented works effectively even in the situation that electromagnetic environment varies severely.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2012年第12期1534-1538,共5页
Journal of Harbin Engineering University
作者简介
李文兴（1960-），男，教授，博士生导师；
李弋鹏（1986-），男，博士研究生．通信作者：李弋鹏，E-mail：liyipeng@hrbeu．edu．cn．
