弹道中段目标回波平动补偿与微多普勒提取

Translation compensation and micro-Doppler extraction of the echo from ballistic targets in midcourse

该文针对弹道目标回波微多普勒过大或过小时平动补偿和微多普勒提取问题,提出了一种时域处理方法.该方法通过多级延迟共轭相乘处理实现平动补偿,通过调整延迟时间实现微多普勒缩放,并根据信号能量差异使用Hough变换进行各信号分量的逐次分离和微多普勒的逐次提取.理论分析和仿真实验均表明:本文方法可以有效进行多分量弹道目标复合运动回波信号平动补偿和微多普勒提取,显著提高雷达探测微动结构的能力.

To compensate the translation and extract micro-Doppler of the echo from ballistic target when micro-Doppler is too big or too small, a translation compensation and micro-Doppler zooming method in time- domain is proposed in this paper. The method can compensate translation by multi-order delayed and conjugated multiplication as well as realize micro-Doppler zooming by adjusting the delayed time. Micro-motion signal and micro-Doppler of every scatter are successively separated and extracted according to the energy intensity. Theory analysis and simulation results both indicate that this method can precisely compensate and extract micro-Doppler of multi-component signal when micro-Doppler is too big or too small which will greatly improve the performanceof the radar on detecting micro-motion structure.