基于距离走动校正和多普勒高阶项补偿的高超音速目标检测方法

摘要

针对机载雷达对高超音速运动目标的检测性能下降问题,首先建立了高超音速运动目标回波信号模型,在此基础上定量分析了目标高超音速运动引起的跨距离单元走动和多普勒频率时变现象.经过详细推导,利用Keystone变换法完成了回波的跨距离单元走动校正,并将基于高阶模糊度函数的参数估计技术应用于高超音速目标多普勒参量估计中,补偿多普勒高阶项后进行相参积累处理.通过计算机仿真证明了所提方法的右效性.%To solve the problem of detection performance descending of airborne radar, an echo signal model of hypersonic moving target is established in this paper, then the range migration and time-varying Doppler frequency characteristics resulted from target' s hypersonic moving are analyzed. Through the inference formula, the Keystone transform is employed to correct the range migration, and the high-order ambiguity function method is used to estimate the Doppler parameter of a hypersonic moving target. The coherent integration process is carried out after compensating the high order of Doppler frequency. Computer simulation results confirm the effectiveness of the proposed method.