基于Hilbert的超宽谱极窄脉冲拖尾抑制及相参积累方法  

An ultra-wide spectrum narrow pulse trailing suppression and coherent accumulation method based on Hilbert transform

作　　者：时鹏飞 郭国强[1] 韩文俊[1] 伍光新[1] SHI Pengfei;GUO Guoqiang;HANWenjun;WU Guangxin(Nanjing Institute of Electronic Technology,Nanjing 210039,China)

机构地区：[1]南京电子技术研究所,南京210039

出　　处：《空天预警研究学报》2025年第1期7-11,共5页JOURNAL OF AIR & SPACE EARLY WARNING RESEARCH

摘　　要：针对冲激雷达远距离探测时面临目标回波微弱并伴随拖尾失真等难题,提出了一种基于Hilbert的超宽谱极窄脉冲拖尾抑制及相参积累方法.首先,通过基于Hilbert变换的超宽谱极窄脉冲波形频域多项式拟合,实现超宽谱信号拖尾的有效抑制;其次,采用基于直达波估计和广义Radon-Fourier变换(GRFT)相结合的超宽谱极窄脉冲动目标相参积累方法,解决冲激信号脉间抖动及对目标运动速度敏感性导致积累性能严重下降的难题.试验结果表明,本文所提方法在降低极窄脉冲信号拖尾长度和多脉冲积累性能提升方面有效.In order to solve such problems of impulse radar in long-distance detection as weak target echoes accompanied by trailing distortion effects,an ultra-wide spectrum narrow pulse trailing suppression and coherent accumulation method is proposed.Firstly,the effective suppression of ultra-wide spectrum signal trailing is achieved by frequency-domain polynomial fitting of ultra-wide spectrum narrow pulse waveform based on Hilbert transform.Then,a coherent accumulation method for ultra-wide spectrum narrow pulse moving targets based on direct wave estimation and generalized Radon Fourier transform(GRFT)is adopted to solve the problem of inter-pulse jitter of impulse signals and severe degradation of accumulation performance caused by sensitivity to target velocity.The experimental results show that the proposed method is effective in reducing narrow pulse trailing length and improving the performance of multi-pulse accumulation.

关 键 词：冲激雷达 Hilbert变换 极窄脉冲 拖尾抑制 相参积累 

分 类 号：TN957.51[电子电信—信号与信息处理]