一种高超声速机动目标双(多)基地雷达探测方法

A Hypersonic Maneuvering Target Detection Algorithm with Bistatic(Multi-static)Radar

研究双基地雷达探测下临近空间高速机动目标的回波模型,针对长时间积累过程中回波包络中心跨距离单元走动及跨多普勒单元走动等问题,分析目标加速运动对回波积累的不利影响,提出一种基于Keystone变换和改进的三次相位变换的临近空间高速机动目标检测方法。该方法采用改进的三次相位变换估计多普勒变化率,基于运动参数补偿思想,实现大加速度条件下长时间回波信号的有效积累,从而实现临近空间高超声速目标检测。仿真结果表明,该方法能够克服距离走动和多普勒展宽的影响,改善脉冲积累的性能,提高双(多)基地雷达对临近空间高超声速机动弱目标的检测能力。

The bistatic radar echo model of near space hypersonic maneuvering targets is studied. For the range eel1 migration of echo envelope center and Doppler cell migration during the long-term coherent integration period, the adverse effect of the target＇ s maneuver on the echo integration is analyzed, and a hypersonic maneuvering target detection algorithm with bistatie radar is pro- posed based on the Keystone transform and Radon-CPF （Cubic Phase Function） transform. The improved CPF transform method is adopted to estimate the Doppler rate, and hypersonic vehicles with great acceleration can be detected by long-term echo integration based on the motion parameter compensation thought. Simulation results show that this algorithm can overcome the adverse effect and improve the bistatic radar＇ s detection ability for hypersonic maneuvering targets.