| 摘要: |
| 通过分析空基雷达对空目标检测时的简化运动模型，提出了一种基于时频反转互相关的方法来同时校正奇数次运动项带来的距离徙动和偶数次运动项带来的多普勒徙动。对于急动度较大的三阶运动模型，在此方法的基础上进一步提出了对称时移双重自相关处理的方法来估计得到急动度信息，通过其构建补偿函数来消除急动度带来的多普勒扩散。该方法无需进行参数搜索，计算量较小，可以适用高阶运动模型，实验验证积累效果较好。算法具有较好的工程应用前景，可推广应用到其他高速飞行器低可检测性场景下雷达回波信号的检测。 |
| 关键词: 高速飞行器 空基雷达 目标检测 相参积累 |
| DOI：10.20079/j.issn.1001-893x.220504002 |
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| 基金项目:装备预研基金项目（80915010301） |
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| A Coherent Integration Method for Signals of High-speed Weak Maneuvering Target of Air-borne Radar |
| LIU Tianhao,YAO Zekun,CHEN Xi,SHI Qingzhan,ZHANG Xiaofa,YUAN Naichang |
| (State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System,National University of Defense Technology,Changsha 410005,China) |
| Abstract: |
| Through analyzing a simplified motion model of air-borne radar for air target detection,a method based on time-frequency domain reverse cross-correlation is proposed to correct the range cell migration caused by odd power motion item and Doppler migration caused by even power motion item.Based on this method,for the third-order motion model with large jerk,a symmetrical time-shift double autocorrelation processing method is proposed to estimate the jerk information and construct a compensation function to eliminate the Doppler diffusion caused by jerk.The proposed method does not need parameter search,has small amount of calculation,and can be applicable to high-order motion model.The experimental results verify the ideal effect of the algorithm.The proposed method has good engineering application prospects and can be extended to the detection of radar echo signals in other low detectability scenes of high-speed aircraft. |
| Key words: high-speed aircraft air-borne radar target detection coherent integration |
