【摘要】 分析了相控阵机载预警雷达空时自适应处理在非均匀环境下的不足,即辅助通道中杂波干扰与检测通道中目标信号由于有限次样本而存在相关性,进而引起信号相消现象.提出了一种改进的空时自适应处理辅助通道杂波抑制技术,消除了目标信号对训练自适应权的不利影响,并给出了它的具体实现结构.该方法在抑制杂波时可有效克服目标信号相消现象,明显提高系统的检测性能,计算机仿真结果验证了其有效性.更多还原

【Abstract】 The auxiliary channel processing (ACP) is one of the reduced rank methods for space time processing (STAP) clutter mitigation. However, the ACP technique has an imperfection of signal self-nulling by the correlation between the clutter in the auxiliary channel and the signal in the main channel due to the limited samples in the non-homogeneous environments. Thus, a new method for clutter mitigation based on ACP for phased array airborne early warning (AEW) radar was proposed, which aims at avoiding the bad effect of the target signal in the adaptive weight training, and its detailed realization structure was also given. The new method is very robust whether the target exists or not, therefore greatly improving the target test performance. The final computation experiments also prove the effectiveness of the proposed method.更多还原