摘要
机载前视阵雷达近程不同距离门杂波的方位-多普勒分布不同,导致杂波具有强烈的距离依赖性,从而使得杂波噪声协方差矩阵估计不准确,空时自适应处理(STAP)的杂波抑制性能严重下降。针对该问题,提出了一种全谱域的杂波距离依赖性补偿方法。以雷达先验参数知识为基础重构各距离门的杂波协方差矩阵,对重构的杂波协方差矩阵向参考距离门进行一定变换,进而实现全谱域的补偿。仿真实验结果证明了该方法的有效性。
As known that the clutter direction-Doppler curves do not align on the near range bins for forward looking airborne radars,therefore,the clutter has serious clutter range dependence and the performance of clutter suppression by Space-Time Adaptive Processing（STAP）degrades greatly.To deal with this problem,a whole spectrum compensated method is proposed.The method rebuilds the clutter covariance matrix based on pre-known parameters,and then finds a matrix to transform the covariance matrix of near range gate to the referenced far range gate.It can compensate the clutter range dependence well.The simulation results show validity of the method.
出处
《计算机工程与应用》
CSCD
北大核心
2010年第23期138-140,共3页
Computer Engineering and Applications
基金
湖南省教育厅科学研究项目(No.09C201)
关键词
机载前视阵雷达
距离依赖性
空时自适应处理
杂波协方差矩阵
forward looking airborne radar
range dependence
Space-Time Adaptive Processing
clutter covariance matrix
