基于光纤模式数据采集方案的阵列快拍成像雷达

发布时间：2018-05-04 17:49

本文选题：阵列快拍成像 + 高速AD　；参考：《信号处理》2017年04期

【摘要】：阵列快拍成像雷达采用阵列天线雷达成像体制,通过高速微波开关切换和高速数据采集,可以同时实现对目标的空间分辨和时间分辨,即实现雷达快拍成像,该技术在飞行器平台的辅助导航、交通监测等领域具有广阔的应用前景。阵列快拍成像雷达的特点是能够快速成像,核心技术包括微波信号收发、高速数据采集与传输、实时成像处理及阵列天线高速微波开关切换。其中,高速数据采集与传输是实现快速成像是正确成像的关键,数据缺失会导致图像散焦。本文首先分析了阵列快拍成像雷达成像原理及信号采样对数据采集与传输系统的要求;继而提出了基于光纤传输模式的数据采集与传输系统方案,系统采用四路高速AD对雷达基带信号进行采样,在FPGA中进行复数运算,通过光纤通道传送到主控计算机,系统传输速率可以达到2.5Gbps;最后,通过阵列快拍成像实验验证了系统的性能。
[Abstract]:Array rapid-beat imaging radar uses array antenna radar imaging system, through high-speed microwave switch switching and high-speed data acquisition, can simultaneously achieve the spatial and time resolution of the target, that is, achieve radar rapid-beat imaging. The technology has a broad application prospect in the fields of aircraft platform auxiliary navigation, traffic monitoring and so on. Array rapid-beat imaging radar is characterized by rapid imaging. The core technologies include microwave signal transceiver, high-speed data acquisition and transmission, real-time imaging processing and array antenna high-speed microwave switch switching. Among them, high-speed data acquisition and transmission is the key to correct imaging, and the absence of data can lead to defocusing. This paper first analyzes the imaging principle of array rapid-beat imaging radar and the requirement of signal sampling for data acquisition and transmission system, then puts forward a scheme of data acquisition and transmission system based on optical fiber transmission mode. The system uses four high speed AD to sample the radar baseband signal, carries on the complex operation in the FPGA, transmits to the main control computer through the optical fiber channel, the system transmission rate can reach 2.5 Gbps. finally, The performance of the system is verified by array rapid-shot imaging experiment.
【作者单位】：中国安全生产科学研究院;北京科技大学土木与环境工程学院;内蒙古工业大学雷达技术研究所;北京航空航天大学电子信息工程学院;
【基金】：国家自然科学基金青年基金(61401434);国家自然科学基金面上项目(61372186) 中国博士后科学基金面上项目(2015M581142) 中央科研事业单位基本科研业务项目资助(2017JBKY05)
【分类号】：TN958

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