基于非正交基的空时可分离滤波器设计  

Design of A Separable Space- time Filter Based on Non- orthogonal Basis

作　　者：向聪[1] 雷刚[1] 田欢[1] 

机构地区：[1]西安电子工程研究所,西安710100

出　　处：《火控雷达技术》2015年第1期49-54,共6页Fire Control Radar Technology

摘　　要：文利用最优空时二维处理器权矩阵的低秩特性,将空时最优滤波器分解为多对空域滤波器与时域滤波器组,从而提出了一种基于非正交基的降维自适应算法以抑制机载雷达所面临的地杂波。与最优空时二维处理器相比,本文所提方法通过降维处理有效避免了高维协方差矩阵的估计与求逆运算,大大降低了系统的计算复杂度和训练样本需求,有利于工程实现。Space - time optimal filter can be decomposed to multi - pairs of space filter and time - filter banks by u- tilizing low -rank feature of 2D optimal space -time adaptive processing （STAP） weight matrix; and then a dimen- sion - reduced STAP algorithm for airborne radar to suppress the ground clutter is introduced. Comparing with opti- mal STAP, the algorithm presented can effectively eliminate high -dimensional covariance estimation and inversion computation, which can significantly reduce computational complexity and requirement to training samples, and is advantage to engineering implementation.

关 键 词：机载雷达 空时二维处理 降维 非正交基 

分 类 号：TJ302[兵器科学与技术—火炮、自动武器与弹药工程]