基于光纤网络架构的分布式多目标定位系统

发布时间：2018-06-19 11:42

本文选题：分布式定位 + 微波光子　；参考：《南京航空航天大学》2017年硕士论文

【摘要】：分布式雷达在隐蔽性、定位精度、反隐身能力等方面拥有显著优势,是现代雷达的重要发展方向。分布式雷达的多个发射机和接收机放置在不同位置,使用传输链路在中心站集中信息,进行数据融合处理,从而获取更详细的目标信息。得益于微波光子技术的大带宽、低损耗、不受电磁干扰等特性,微波光子学可以产生宽带极大的正交信号,实现宽带射频信号信道化接收;光纤网络可以突破微波传输链路的限制,实现远距离大容量传输原始数据,从而避免了发射机和接收机中信号预处理所需要时钟同步问题。微波光子学为分布式雷达突破电子学瓶颈提供了技术基础。本文研究基于光纤网络架构的分布式多目标定位系统,针对多目标定位对信号产生、接收以及系统构建的需求,提出了基于微波光子学的新方案和新方法,主要开展了以下三个方面的研究工作:1.研究了基于光纤网络架构的分布式多目标定位系统,理论分析多目标定位对发射信号源的需求和接收系统的需求,实现了基于微波光子技术对多目标进行定位;实验搭建了在二维平面同时对两个目标进行定位的系统,定位误差优于7.09 cm。2.提出并研究了基于偏振调制光电振荡器的相位混沌信号产生方案,理论分析了相位混沌信号的自相关,互相关,功率谱形状和模糊函数等特性,着重研究了其在边峰抑制比方面的优势,以及对多目标定位性能的改善;实验实现了基于偏振调制的相位混频信号产生,并对其特性进行了分析,验证理论模型。3.针对宽带混沌信号的接收和处理需求,提出并研究了基于相干光频梳和受激布里渊散射效应的信道化,理论分析和实验实现了信道带宽为80MHz、邻道抑制比高于19.52dB的4信道的信道化接收机,信道化参数灵活可调。
[Abstract]:Distributed radar has remarkable advantages in concealment, positioning accuracy and anti-stealth ability, which is an important development direction of modern radar. Multiple transmitters and receivers of distributed radar are placed in different positions, and the data fusion process is carried out by using the transmission link centralized information in the central station, so as to obtain more detailed target information. Due to the large bandwidth, low loss and no electromagnetic interference of microwave photonic technology, microwave photonics can generate wide-band maximal orthogonal signals and realize channelized reception of wideband RF signals. Optical fiber network can break through the limitation of microwave transmission link and realize long distance and large capacity transmission of raw data, thus avoiding the problem of clock synchronization for signal preprocessing in transmitter and receiver. Microwave photonics provides a technical basis for distributed radar to break through the bottleneck of electronics. In this paper, a distributed multi-target localization system based on optical fiber network architecture is studied. A new scheme and method based on microwave photonics are proposed to meet the requirements of signal generation, reception and system construction for multi-target location. Mainly carried out the following three aspects of research work: 1. The distributed multi-target positioning system based on optical fiber network architecture is studied. The requirement of multi-target positioning for transmitting signal source and receiving system is analyzed theoretically, and the multi-target location based on microwave photonic technology is realized. The system of locating two targets simultaneously in two dimensional plane is built, and the positioning error is better than 7.09 cm. 2. A phase chaotic signal generation scheme based on polarization modulated optoelectronic oscillator is proposed and studied. The autocorrelation, cross-correlation, power spectrum shape and ambiguity function of the phase chaotic signal are theoretically analyzed. The advantages of PSRR and the improvement of multi-target localization performance are emphatically studied, and the phase mixing signal generation based on polarization modulation is realized experimentally, and its characteristics are analyzed to verify the theoretical model .3. The channelization of chaotic signals based on coherent optical comb and stimulated Brillouin scattering is proposed and studied to meet the needs of receiving and processing wideband chaotic signals. A channel based receiver with a bandwidth of 80 MHz and a rejection ratio of 19.52 dB is realized theoretically and experimentally. The channelization parameters can be adjusted flexibly.
【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】：2017
【分类号】：TN95

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