一种基于局部变换处理的干扰抵消后置处理方法

Post-processing method of interference suppression based on local transform processing

针对基于阻塞矩阵方式抵消干扰产生的探测影区问题,提出了一种基于局部变换处理的干扰抵消后置处理方法。首先根据干扰抵消方位对接收阵拾取数据进行线性变换处理,合成一组新数据;其次采用空间谱合成方法对新数据进行变换处理,得到空间各方位对应空间谱;然后采用局部变换处理方法,提取空间谱基底变化量;最后采用空间谱基底变化量对空间谱进行均衡处理,降低探测影区。数值仿真和数据处理均表明,该方法通过对干扰抵消后空间谱进行局部非线性均衡处理,减小了空间谱基底变化量,将探测影区缩小到了3°以内,改善了基于阻塞矩阵方式干扰抵消方法。

For the detection blind zone problem of interference suppression method based on block matrix,this paper proposed a post-processing method of interference suppression based on local transform processing.Firstly,the method used linear transform synthesize a set data on the interference suppression azimuth.Secondly,it obtained the corresponding spatial spectrum of each spatial azimuth by spatial spectrum synthesis method.Then,it extracted the base change value of spatial spectral by local transformation.Finally,it equalized the spatial spectrum by the base change value of spatial spectrum and reduced the detection blind zone.The numerical simulation and data processing results show that,this method reduces the change value of spatial spectrum base through local nonlinear equalization of spatial spectrum after interference suppression,reduces detection blind zone within 3°,and improves interference suppression method based on block matrix.