蓝绿激光对潜通信技术-光学工程专业论文.docxVIP

摘 摘 要 本文以机载海洋激光对潜通信系统为背景，分析和概括了海水光散 射信道中的各物理成份的物理和光学性质，讨论了海水的固有和视在光 学槛质。详细地阐述了模拟兜子在多次散射介质中传输的蒙特卡罗方 法。通过蒙特卡罗方法的模拟研究，建立了机栽激光对潜通信的光脉冲 传输模型，研究了信号免脉冲的对阐扩展，分析并模拟了接收面上的接 收波形。 基于对海拳信道的蒙特卡罗模耘，本文对海水信遗进行了多径化描 述，研究了由于信道的多径化所产生的频率选择性衰落对通信质量的影 咬，分橱矛透过诗雾糖模耘确定了海水信遘的秘关带宽。炙申提蠢把频 率分柴接收技术应用于对潜通信中，以达到抗频率选择性衰落的目的， 著逸过嚣箬毒凡模拟碍斑了莫娃缝鲢线。 关键谰； ～光倍道散射激光对潜涌信” 蒙特卡罗方法时频调制 一 ABSTRACTThis ABSTRACT This dissertation presents the author’S main contributions in the studies of the sea optical scatter channel by use of Monte Carlo simulation on the background of airborne oceanic submarine laser communication system． Physical and optical properties of physical constituents in sea optical scatter channel are studied and summarized．Inherent and apparent properties of sea are highlighted．The application of Monte Carlo method in simulation the transport of photons in multiple scatter media is discussed in detail．The optical channel models for airborne submarine laser communication are built．The multipath time spreading of signal pulse is studied．The waveform of received signals in receiver in submarine laser communication system is analyzed and simulated． Be based upon the studies of sea optical scatter channel by use of Monte Carlo simulation，the channel is described as a multipath routeway in this paper．The effect on the communications performance，created by the frequency selectivity decline caused by the multipath routeway，is worked over．The correlation bandwith of sea optical scarer channel is analyzed and quantified through the simulation on the computer．Finally，this thesis put forward the application of frequency diversity reception to the counteraction against the frequency Selectivity decline in the airbome oceanic submarine laser communication system，and whose capability graph is educed through the simulmion on the computer． Key words：opticalchannel scatter submarinelasercommunications montecarlo method time—frequency modulation 第一章 第一章 绪论 §1．1蓝绿激光对潜通信技术的意义 战略核潜艇是一个国家战略核成慑力量的重要组成部分。由于陆地 上核设施易受攻击，生存