基于微波光子技术的分布式雷达研究

发布时间：2019-01-12 19:44

【摘要】：分布式雷达可以有效地提高雷达系统的生存能力和作战性能,是未来雷达发展的重要方向。分布式雷达采用多基地形式,多个发射机和接收机在探测区域内广泛分布,通过数据处理中心对接收数据进行融合处理从而获取目标信息。分布式雷达的高精度定位需求对传统电子技术在高可靠的分布式系统架构,多站的高精度时间同步,大带宽正交波形产生以及多节点宽带信号的长距离传输等关键问题上提出了挑战。微波光子技术克服了传统微波系统在处理速度和传输带宽等方面的电子瓶颈,且具有损耗低和抗电磁干扰等优点,为新型分布式雷达系统的发展提供了有力支撑。本文以基于微波光子技术的分布式雷达系统为研究方向,在分布式雷达系统及其关键技术上提出了光子辅助的新方法,主要开展了以下两个方面的研究工作:1.提出并研究了基于波分复用技术的分布式信号源定位系统,通过引入基于波分复用技术和光载无线技术的新型分布式多站时差定位系统架构,实现了对信号源的高精度定位。分析了到达时间差定位技术的原理,并分析了时差测量误差和基线长度对系统定位精度的影响;搭建了由三个节点组成的实验系统,成功对Wi Fi信号源进行了二维平面定位,定位精度达到16.21cm。2.提出并研究了基于波分复用技术的分布式多输入多输出混沌雷达系统,通过引入光子辅助的宽带正交波形产生,并将其和基于波分复用技术的光载无线系统无缝结合,实现了对物体的高精度定位。实验研究和分析了基于光电振荡器的正交混沌信号产生及其特性;研究分析了到达时间测量误差和基线长度对系统定位精度的影响;搭建了由两个发射机和两个接收机构成的实验系统,实现了基于自适应滤波的直达波抑制,成功对金属物体进行了二维平面定位,定位精度达到6.49cm。
[Abstract]:Distributed radar can effectively improve the survivability and combat performance of radar system, which is an important direction of radar development in the future. The distributed radar adopts the multi-static form, and many transmitters and receivers are widely distributed in the detection area. The received data are fused by the data processing center to obtain the target information. The high precision positioning requirement of distributed radar is required for the traditional electronic technology in the high reliable distributed system architecture, the high precision time synchronization of multi-station, The key issues such as the generation of large bandwidth orthogonal waveforms and the long distance transmission of multi-node wideband signals are challenged. Microwave photon technology overcomes the electronic bottleneck of traditional microwave system in processing speed and transmission bandwidth, and has the advantages of low loss and anti-electromagnetic interference, which provides a powerful support for the development of new distributed radar system. In this paper, the distributed radar system based on the microwave photonic technology is taken as the research direction, and a new method of photon assistant is put forward in the distributed radar system and its key technology. The following two aspects of research work are mainly carried out: 1. A distributed signal source location system based on wavelength division multiplexing (WDM) technology is proposed and studied. A new distributed multi-station time difference location system architecture based on wavelength division multiplexing (WDM) and optical wireless technology is introduced to achieve high precision localization of the signal source. The principle of time-of-arrival positioning technology is analyzed, and the influence of time difference measurement error and baseline length on the positioning accuracy of the system is analyzed. An experimental system composed of three nodes has been built, and the Wi Fi signal source has been successfully located in two-dimensional plane. The positioning accuracy is 16.21 cm 路2. 2. A distributed multi-input and multi-output chaotic radar system based on wavelength division multiplexing (WDM) technology is proposed and studied. A photonic assisted wideband quadrature waveform is generated and combined seamlessly with an optical-borne wireless system based on wavelength division multiplexing (WDM) technology. The high precision positioning of the object is realized. The generation and characteristics of orthogonal chaotic signals based on optoelectronic oscillator are studied and analyzed experimentally, and the effects of measurement error of arrival time and baseline length on the positioning accuracy of the system are studied and analyzed. An experimental system consisting of two transmitters and two receivers is set up, and the direct wave suppression based on adaptive filtering is realized. The two-dimensional planar positioning of metal objects is successfully carried out, and the positioning accuracy reaches 6.49 cm.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN958

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