一种基于面阵的旁瓣对消方法

摘要

目前基于阵列的旁瓣对消方法,主要是通过自适应算法对各阵元进行幅度和相位加权,使得阵列波束图在干扰方向上形成零陷,即可对该方向上的干扰进行抑制.由于利用了自适应算法,所以随着阵元数的增多,该算法的硬件实现将越来越难,甚至会导致算法失效.以面阵为例,提出了两种在干扰来波方向上快速形成零陷的方法.这两种方法摒弃了以往方法中的自适应权值求取过程,只需要利用事先求取好的权值对选定的阵元进行加权处理,极大地增强了系统的实时处理能力.另外,两种方法形成的零陷足够深且宽,对主瓣没有影响.%The interfering signals could be reduced by weighting the amplitude and phase of array elements and forming a null steering at the direction the interfering signals come. However, the algorithm may be ineffective with increasing number of the array elements. In this paper, two methods of forming null steering based on planar arrays are proposed. Both of the methods abandon the adaptive algorithm, only use the constant weights to weight the selected arrays, improving real-time processing ability of the system. Simultaneously, the generated null steering is deep and wide enough and has no effect on the main lobe.