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

Abstract: 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.

Key words: forward looking airborne radar, range dependence, Space-Time Adaptive Processing, clutter covariance matrix