非合作无源双基地雷达弱目标长时间积累技术  

Long-time Integration of a Multi-waveform for Weak Target Detection in Non-cooperative Passive Bistatic Radar

作　　者：钱李昌[1,2] 许稼[1] 胡国旭[2] Qian Lichang XuJia Hu Guoxu(School of Information and Electronic, Beijing Institute of Technology, Beijing 100081, China Troop 95174, People＇s Liberation Army, Wuhan 430040, China)

机构地区：[1]北京理工大学信息与电子学院 [2]中国人民解放军95174部队

出　　处：《雷达学报（中英文）》2017年第3期259-266,共8页Journal of Radars

基　　金：中国博士后科学基金(2016M591086);国家自然科学基金(61271391;61671061);新世纪优秀人才支持计划(NCET-13-0049);部委基金项目(9140A21050114HT05338)~~

摘　　要：与常规体制雷达相比,空间、时间以及相位同步问题使得非合作双基地雷达(NPBR)中微弱目标探测难度更大。为此,该文给出了一种基于直达波波形参数估计的时间和相位同步方法以及基于捷变波形长时间相参积累的弱目标探测方法。首先,提出了一种基于差分索引的通用脉冲提取方法。其次,给出了脉冲宽度、脉冲重复间隔、带宽、载频以及波达时间等直达波脉冲参数的估计方法,实现了NPBR的时间和相位同步。然后,在波形参数估计的基础上,给出了一种基于捷变波形广义Radon-Fourier变换的弱目标探测算法。最后,仿真和实测数据实验验证了该文算法的有效性。Space, time, and phase synchronization problems make weak target detection evenmore difficult in the Non-cooperative Passive Bistatic Radar （NPBR） than in conventional radar systems. Therefore, a time and phase synchronization method based on direct waveform parameter estimation and a weak target detection method based on long time coherent integration of a multi-waveform is presented in this paper. First, a universal pulse extraction method based on differential sequence indexing is proposed. Second, an estimation method for the direct waveform parameters, including pulse width, pulse repetition intervals, bandwidth, carrier frequency, and arrival time, is provided. Therefore, by using the estimated waveform parameters, the NPBR time and phase synchronization can be realized. Moreover, based on the waveform parameter estimation, a weak target detection method based on the generalized Radon-Fourier transform of a multi-waveform is provided. Finally, simulation and real data experiments for verifying the effectiveness of the waveform parameter estimation and weak target detection methods are provided.

关 键 词：非合作无源双基地雷达 微弱目标 相参积累 捷变波形估计 广义Radon-Fourier变换 

分 类 号：TN957.51[电子电信—信号与信息处理]