星载激光脉冲水下光斑分布的研究  

Research on Underwater Spot Distribution of Space-borne Laser Pulse

作　　者：詹恩奇[1,2] 王宏远[1] 

机构地区：[1]华中科技大学电信系,武汉430074 [2]武汉理工大学信息工程学院,武汉2430070

出　　处：《武汉理工大学学报（交通科学与工程版）》2009年第1期103-106,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家自然科学基金项目资助(批准号:60572015)

摘　　要：利用半解析MonteCarlo方法，计算了星载激光脉冲水下光斑的分布状况，采用修正Henyey-Greenstein函数表示大气和海水信道的散射相位函数，计算结果表明：水下光斑的大小与卫星高度、水下深度及大气、海水的散射强度有关；在不考虑卫星与地球相对移动的条件下，水下300m深度光斑半径可达6km,发射机所发射光子仅有84％～88％能够到达水下接收平面；星载激光水下光斑分布不能视为大气和海水各自散射所引起光斑分布的简单叠加。Based on the semi-analytic Monte Carlo method, this thesis calculates the underwater spot distribution of space-borne laser pulse. A modified Henyey-Greenstein function is used to replace the scattering phase function of the atmosphere and the seawater. The results show the spot be decided by the satellite altitude, the depth, scatter intensity of atmosphere and seawater; Without regard to the relative move between satellite and submarine, the spot radius of 300m depth underwater is about 6km; The number of photons arrived the underwater receiving plan is about 84～88 percents of whole photons transmitted; The spot distribution of space-borne laser submarine communication don＇t equal to the sum of those resulted from atmosphere and seawater scattering severally.

关 键 词：MONTE CARLO方法 散射相位函数 光斑分布 激光对潜通信 

分 类 号：TN929.1[电子电信—通信与信息系统]