Lutz卫星信道模型的分析及实现  

Analysis and Implementation of the Lutz Satellite Channel Model

作　　者：严艳[1] 张其善[1] 常青[1] 杨东凯[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100083

出　　处：《遥测遥控》2007年第6期11-15,共5页Journal of Telemetry,Tracking and Command

基　　金：国家863计划课题(2006AA701424);航空基金资助项目(2006ZC51032)

摘　　要：卫星信道特性的分析有助于系统选择更合理的调制解调方式、信道编码方式和差错控制方式。文中讨论并实现一种能实时反映卫星信道特性的Lutz模型,实现了建立该模型所必需的三种分布,即瑞利、莱斯和对数正态分布;应用信道动态切换的方法实现了Lutz模型所要求的信道环境切换,使仿真模型能更真实地反映实际信道。仿真结果表明,由计算机仿真模型得到的曲线和理论曲线拟合程度较好,该模型能准确地反映卫星信道特性,可以用于实际系统的研制开发。The analysis of satellite channel's characteristics is helpful to select reasonable methods for the modulation and demodulation,channel coding,and error control of the system.The Lutz model well reflecting satellite channel's feature is discussed.The Rayleigh,Rician and Lognormal distributions required during the Lutz model establishment are implemented.The method to switch channels dynamically is applied to realize the channel environment alteration,and it makes the simulation model more practical.The simulation results indicate that the curves of simulation model and theoretical formula fit well,the model can reflect the satellite channel accurately,and can be used in the system development.

关 键 词：卫星通信 Lutz模型 瑞利分布 莱斯分布 对数正态分布 

分 类 号：TN927.2[电子电信—通信与信息系统]