肖雪迪,
郑小平,
清华大学电子工程系，北京信息科学与技术国家研究中心 ??北京 ??100084
基金项目:国家自然科学基金(61690191, 61690192, 61420106003, 61621064)
详细信息
作者简介:李尚远(1982–)，男，博士，清华大学电子工程系助理研究员，研究方向为微波光子学。E-mail: syli@mail.tsinghua.edu.cn
肖雪迪(1993–)，女，清华大学电子工程系博士生，研究方向为基于微波光子学的分布式相参雷达。E-mail: xxd15@mails.tsinghua.edu.cn
郑小平(1965–)，男，博士，清华大学电子工程系教授，研究方向为微波光子学、光网络与光通信。E-mail: xpzheng@mail.tsinghua.edu.cn
通讯作者:郑小平 xpzheng@mail.tsinghua.edu.cn
中图分类号:TN957.51计量
文章访问数:2620
HTML全文浏览量:1135
PDF下载量:343
被引次数:0
出版历程
收稿日期:2019-02-17
修回日期:2019-04-02
网络出版日期:2019-04-12
Distributed Coherent Aperture Radar Enabled by Microwave Photonics
LI Shangyuan,XIAO Xuedi,
ZHENG Xiaoping,
Department of Electronic Engineering, Beijing National Research Center for Information Science and Technology, Tsinghua University, Beijing 100084, China
Funds:The National Natural Science Foundation of China (61690191, 61690192, 61420106003, 61621064)
More Information
Corresponding author:ZHENG Xiaoping, xpzheng@mail.tsinghua.edu.cn
摘要
摘要:分布式相参孔径雷达(DCAR)是利用多个空间分离的天线孔径，向同一区域辐射信号，实现空间电磁波相参合成的雷达系统，具有系统灵活、探测分辨力高、威力大、成本低等优势。结合微波光子技术在宽带信号产生、传输、处理等多方面的优势，可以使DCAR的性能得以充分发挥。该文介绍了清华大学在基于微波光子原理的高分辨DCAR方面的成果，借助微波光子技术，在接收相参模式下，产生了8.5～11.5 GHz, 0.5 Gbps编码速率的宽带正交调相线性调频波，距离分辨率优于0.05 m、正交性接近30 dB。在全相参模式下，发射波形可灵活切换为宽带相参线性调频波，实现全相参合成。系统产生的波形能满足DCAR各个工作模式的波形需求。实验中，在两部雷达的参与下，通过全相参合成，获得了8.3 dB的信噪比增益。
关键词:微波光子学/
分布式相参/
雷达
Abstract:Distributed Coherent Aperture Radar (DCAR) utilizes multiple separated antenna apertures to emit signals in the same space area, realizing spatial coherent synthesis of electro-magnetic waves. Such a flexible radar system has advantages such as higher resolution, greater radar power, and lower cost. Combined with microwave photonic technologies, which have merits in wideband signal generation, transmission and procession, the DCAR has a comprehensive and better performance. This paper introduces a microwave photonics-based high-resolution distributed coherent aperture radar that was proposed by researchers of Tsinghua University. Taking advantages of microwave photonic technology, a group of wideband orthogonal phase-coded linear frequency modulation waves is generated in the coherence-on-receive mode, with the frequency ranging from 8.5 GHz to 11.5 GHz, all with phase coding under a bit rate of 0.5 Gbps. The orthogonality of the signals is nearly 30 dB, and the range resolution is better than 0.05 m. While in the full coherence mode, the transmitted waveforms can be flexibly switched to the wideband coherent linear frequency modulation waves, and the full coherent synthesis can be realized. The waveforms generated by the proposed system can meet the waveform requirements of the DCAR in different operation modes. In the experiment, full coherence is achieved with two sets of radars, resulting a signal- to-noise ratio gain of 8.3 dB.
Key words:Microwave photonics/
Distributed coherent aperture/
Radar
PDF全文下载地址:
https://plugin.sowise.cn/viewpdf/198_b6ad0789-1c68-42a4-bbb3-6550ad3b8071_R19024
