GLONASS卫星信号模拟器导航电文生成  

Generation of the Navigation data for GLONASS Signal Simulator

作　　者：关刚强[1] 葛锐[1] 吕志成[1] 张国柱[1] 

机构地区：[1]国防科技大学卫星导航研发中心,长沙410073

出　　处：《微处理机》2011年第3期35-38,共4页Microprocessors

摘　　要：导航电文的生成是GLONASS卫星信号模拟器研制中的关键部分,获得正确的导航电文信息是接收机实现定位、测速以及授时等功能的前提条件。为了满足接收机测试的需要,GLO-NASS卫星信号模拟器输出信号必须调制正确的导航电文。GLONASS卫星信号模拟器由模拟器仿真软件和信号生成单元组成。主要研究GLONASS卫星信号模拟器的软件部分。在分析GLONASS卫星信号模拟器结构和导航电文结构的基础上,详细介绍了GLONASS卫星信号模拟器中导航电文的生成过程。重点对从R inex文件中读取星历参数并转化成二进制格式导航电文的程序实现进行了深入研究,利用GLONASS接收机对卫星信号模拟器输出的仿真信号进行电文解析和定位解算,试验结果可以验证卫星信号模拟器中导航电文生成的正确性。Generation of navigation data is a key part of the GLONASS signal simulator,and obtaining proper realization of the navigation message is a prerequisite for the receivers＇ positioning,velocity and timing functions,in order to meet the neeeds of the receiver test,GLONASS signal simulator must be prepared to have the correct navigation message.GLONASS signal simulator is composed of the simulation software and signal generation units,this paper focuses on the software part of signal simulator.On the basis of analysising the structure of the signal simulator and GLONASS navigation data,induction to the procession of navigation data generation in the signal simulator software is given in detail.And a particular research on the conversion of the Rinex ephemeris parameters into binary format navigation data is presented.Using the output signal of satellite signal simulator for GLONASS receivers positioning and data analysis,the accuracy of navigation message which is generated by signal simulator can be verified by the results.

关 键 词：信号模拟器 导航电文 卫星星历 电文生成 

分 类 号：TN96[电子电信—信号与信息处理]