本文選題：分布式定位 + 微波光子��； 參考：《南京航空航天大學》2017年碩士論文

【摘要】：分布式雷達在隱蔽性、定位精度、反隱身能力等方面擁有顯著優(yōu)勢,是現(xiàn)代雷達的重要發(fā)展方向。分布式雷達的多個發(fā)射機和接收機放置在不同位置,使用傳輸鏈路在中心站集中信息,進行數(shù)據(jù)融合處理,從而獲取更詳細的目標信息。得益于微波光子技術的大帶寬、低損耗、不受電磁干擾等特性,微波光子學可以產(chǎn)生寬帶極大的正交信號,實現(xiàn)寬帶射頻信號信道化接收;光纖網(wǎng)絡可以突破微波傳輸鏈路的限制,實現(xiàn)遠距離大容量傳輸原始數(shù)據(jù),從而避免了發(fā)射機和接收機中信號預處理所需要時鐘同步問題。微波光子學為分布式雷達突破電子學瓶頸提供了技術基礎。本文研究基于光纖網(wǎng)絡架構的分布式多目標定位系統(tǒng),針對多目標定位對信號產(chǎn)生、接收以及系統(tǒng)構建的需求,提出了基于微波光子學的新方案和新方法,主要開展了以下三個方面的研究工作:1.研究了基于光纖網(wǎng)絡架構的分布式多目標定位系統(tǒng),理論分析多目標定位對發(fā)射信號源的需求和接收系統(tǒng)的需求,實現(xiàn)了基于微波光子技術對多目標進行定位;實驗搭建了在二維平面同時對兩個目標進行定位的系統(tǒng),定位誤差優(yōu)于7.09 cm。2.提出并研究了基于偏振調制光電振蕩器的相位混沌信號產(chǎn)生方案,理論分析了相位混沌信號的自相關,互相關,功率譜形狀和模糊函數(shù)等特性,著重研究了其在邊峰抑制比方面的優(yōu)勢,以及對多目標定位性能的改善;實驗實現(xiàn)了基于偏振調制的相位混頻信號產(chǎn)生,并對其特性進行了分析,驗證理論模型。3.針對寬帶混沌信號的接收和處理需求,提出并研究了基于相干光頻梳和受激布里淵散射效應的信道化,理論分析和實驗實現(xiàn)了信道帶寬為80MHz、鄰道抑制比高于19.52dB的4信道的信道化接收機,信道化參數(shù)靈活可調。
[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.
【學位授予單位】：南京航空航天大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN95

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本文編號：2039768