一种基亏自适应波束形成的主瓣保形算法研究

摘要

To improve the transmitting adaptive beamforming efficiency and performance of the shape maintenance for the mainlobe, analyzed existing adaptive pattern for beamforming.In this paper, the question that the main lobe of adaptive pattern will be distorted significantly, an approach is proposed to maintain the main lobe shape based on a main-lobe subspace, and the high peak side-lobe problem is resolved recurring to the orthononnal projection algorithms available. The new approach can be used to the transmitting adaptive beamforming,adaptive sum and different beam forming. The trace driven simulation shows its performance.%针对自适应波束形成中各种因素包括目标信号存在引起自适应方向图主瓣变形问题，提出基于主瓣子空间的自适应主瓣保形算法，联合已有的正交投影减小方向图因快拍引起的副瓣电平抬高问题。通过保持自适应权中主瓣子空间分量不变以保证主瓣形状不变，通过主瓣子空间选取的大小确定对主瓣的控制强弱。该算法对主瓣有专门的控制，无需估计干扰方向，适用于发射方向图的自适应零陷、和差自适应波束形成，仿真表明该算法对提高自适应波束形成主瓣保形、降低小方向图因快拍引起的副瓣电平抬高问题有较明显的效果。