机载雷达斜视阵下杂波抑制的方法

摘要

In the squint airborne radars,the range dependence of clutter spectrum degrades the performance of conventional space time adaptive processing for clutter suppression,so a new method is proposed.In this method the similarity measure value is obtained by using the spatial domain steering vector relationship between the range bin under test and under test range bins.The received data of adjacent range bins is weighted by these values.In order to improve the detection performance of airborne radar,the non-homo-geneity detector (NHD)is used to mitigate these interferences,and then the conventional STAP is applied to the clutter suppression.Finally,simulation results show that the new method is effective and practical.%在机载斜视阵中杂波多普勒频率随距离发生变化，导致传统的空时自适应处理方法不能有效抑制杂波，因此，提出一种谱补偿方法。该方法利用训练单元与待检单元的空域导向矢量关系得到相似度量值，用此度量值再对训练单元的数据进行加权预处理，提高了数据的平稳性；为降低回波中孤立干扰或强目标对采样协方差矩阵估计的影响，对预处理后的数据使用非均匀检测器进行干扰剔除，从而提高机载雷达的检测性能1~3 dB。使用传统的空时自适应处理方法对剔除干扰后的数据进行杂波抑制，通过对数据的处理，证明了该方法的可行性和有效性。