gps仿真的分析研究.pdf

摘要全球定位系统(GPS)能全天候全天时提供高精度的位置、速度和时间信息。但是在GNSS(G10bal Nvigation Satellite Systems)系统中欧洲的Galileo, 日本的OuasiZenith以及中国的北斗卫星系统逐步完善的过程中,给GPS接收机和软件中的算法都提出了许多新的要求,利用GPS仿真可以有效的解决这些问题。本文的研究就是围绕GPS的观测模型仿真展开的。本文详细地论述了GPS数学仿真模型的建立过程,选用MATLAB来进行卫星仿真。本文结合GPS卫星观测原理、灵活应用多种数学知识来进行模型的建立。最后作者根据自己建立的卫星可见性预报系统对多种观测模型进行了仿真, 其中主要比较了各种观测模型在GPS系统和GPS+GALILEO系统下观测的精度, 并得出了相同观测条件下GPS+GALILEO系统要比DPS系统下观测精度高的结论。本文设计的用户界面简洁、专业且具有易用性。同时编写了复杂的专业配置文件;完成了输入文件的读入和导出,为GPS专业人员提供了更有效的研究工具。关键词:GPS;GPS仿真:仿真模型:MDE。 ABSTRACT Global Positioning System(GPS)can provide services of high precision posi tioning,velocity and timing in a11 weathers and all— inprocess tha tthe European Galileo system,the Japanese OuasiZeni thSatel 1 tes Sytem and the Chinese Beido system,which belong to theGNSS(Global Navigation Satellite Systems),consummates diverse appl ications give rise to some widely varied requirements on recei vers and the efec of algor thms. In order to meet the requirements, above, buildings imulation system iS a good solution. ThiS diSsertation iSdevoted to the GPS research center of thiS paper iS the simulation of observed modle. ThiS paper elaborated the GPS mathematical simulation model setup procedure in detail,selects MATLAB to carry on the satellite paper unifies the GPS satellite observation principle,and the nimble application many kinds of mathematics knowledge to carry on the model the the writer simulate some kinds of simulate modelS by USing the satellite visibility imulation system,which was written by writer pare preci sion of each observed model under the GPS and the GPS+ writer conclude that,under the same observation condition,the precision ishigher intheGPS+GALILEO than intheGPS. The user interface designed in thiS paper is neat, professional abstract in this paper we piled plex professional configuration files, pleted reading inandderiving the input—documen