前视阵FDA-MIMO雷达距离模糊杂波抑制方法

Range-ambiguous clutter suppression based on forward-looking FDA-MIMO radar

超高速平台前视阵雷达面临强杂波抑制难题,其杂波不仅具有显著的距离依赖性而且存在多重距离模糊,导致雷达动目标检测性能急剧恶化。针对这一问题,提出了一种基于频率分集阵列和多输入多输出雷达的距离-角度-多普勒三维自适应处理距离模糊杂波抑制方法。该方法通过发射-接收二维联合空域和差波束及时域邻近多普勒通道进行降维处理,保证算法的低复杂度以及在小样本条件下的杂波抑制性能。仿真实验验证了所提方法的有效性。

Super-high speed platform forward-looking array radar faces the problem of strong clutter suppression.The clutter echo is not only range-dependent but also range-ambiguous,which results in severe performance degradation in moving target detection.To alleviate this problem,a range-angle-Doppler three-dimensional adaptive processing approach based on frequency diverse array-multiple input multiput output radar is proposed for range ambiguity clutter suppression.It is practical to reduce the dimensions of the processor by sum and difference beam in the transmit-receive spatial domains with adjacent Doppler channel in the temporal domain,which ensure the low complexity of the algorithm and enhance clutter suppression performance in the case of small number of samples.Simulation results demonstrate the effectiveness of the proposed method.