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本文介绍一种机载相控阵雷达地杂波抑制的新方法，它属于数据变换类，变换矩阵由主通道和辅助通道组成的联合通道子空间决定。通过设计主通道，变换维数由ＭＫ降至Ｍ＋Ｋ－１（Ｍ）为阵元个数，Ｋ为脉冲数）。该变换由空域波束形成和时域多普勒滤波实现。变换后的数据将在Ｍ＋Ｋ－１维信号空间内进行最优滤波，新方法即使在阵元误差和杂波起伏时也可很好地逼近二维最优阵列性能，但所需的运算量要小得多。
This paper introduces a new method of clutter suppression for airborne phased array radar. It belongs to the class of data transformation. The transformation matrix is determined by the joint channel subspace composed of the main channel and the auxiliary channel. By designing the main channel, the transformation dimension is reduced from MK to M + K-1 (M) as the number of elements and K as the number of pulses. The transform is implemented by spatial beamforming and time-domain Doppler filtering. The transformed data will be optimally filtered in the M + K-1 dimensional signal space. The new method can well approach the optimal two-dimensional array performance even in the case of array element errors and clutter fluctuations, but the amount of computation required Much smaller.