基于空时二维结构的低旁瓣宽带波束形成  

Low-sidelobe wideband beamforming based on space-time structure

作　　者：任超 吴嗣亮[1] 王菊[1] 

机构地区：[1]北京理工大学信息科学技术学院电子工程系,北京100081

出　　处：《系统工程与电子技术》2008年第3期414-417,共4页Systems Engineering and Electronics

摘　　要：在分析空时自适应处理结构的基础上,提出了一种工程上易于实现的低旁瓣波束形成算法。虚拟了不同幅度、不同频点、不同方位角的干扰源,使得空时二维方向图的主瓣指向期望信号来波方向的同时,在其他方向上形成低旁瓣,达到抑制干扰和噪声的目的。由于此算法权值是已知系数矩阵与当前时刻期望信号的空时二维导向矢量的乘积,计算量简单,避免了传统线性约束算法中多次矩阵求逆的复杂运算,既保证了抗干扰性能又便于工程实现。A new low-sidelobe beamforming algorithm based on space-time adaptive processing, which can be used in project easily, is proposed. Lots of jamming sources of different frequencies and different azimuths are simulated. The peak value of space-time 2-dimension beam pattern accords with the direction of the expected signal, and the low-sidelobes are also formed at different frequencies simultaneously. Otherwise, the space-time 2-dimension weight vector can be obtained with the product of a constant matrix and the steering vectors matrix of expected signals. It is convenient to be used in project for its easiness to calculate. The proposed algorithm is more efficient to suppress interference and noise. The simulation results show the effectiveness and stability of the method.

关 键 词：空时自适应 波束形成 导向矢量 干扰抑制 

分 类 号：TN911.2[电子电信—通信与信息系统]