天线指向不精确时的GMR-1卫星同步

发布时间：2019-05-24 16:19

【摘要】：针对卫星天线指向不精确时信息传输的同步性能,在OPNET仿真平台上基于对地静止轨道无线接口(GMR-1)标准建立卫星移动通信模型,研究天线指向不精确时的卫星移动通信系统同步性能.其核心思想是通过移动式地面站和信关站之间的互动来完成影响的仿真,即建立天线指向不精确时的频率与定时同步数学模型,分析频率和定时同步性能的统计特性,得出天线指向不精确时对同步性能带来的定量影响,并进行仿真.理论分析和仿真结果表明,与指向精准的卫星天线相比,天线指向不精确时对卫星系统的定时同步影响较小,而频率同步的性能与用户位置有关,受频率同步影响的误码率性能下降约为10-1~10-2数量级.
[Abstract]:The synchronous performance of the satellite mobile communication system based on the geostationary orbit radio interface (GMR-1) standard is established on the OPNET simulation platform based on the synchronous performance of the information transmission when the satellite antenna is directed to the inexact time, and the synchronous performance of the satellite mobile communication system when the antenna is not accurate is studied. The core idea of the invention is to complete the simulation of the influence through the interaction between the mobile earth station and the gateway station, that is, the frequency and the timing synchronization mathematical model when the antenna is directed to an inexact time is established, the statistical property of the frequency and the timing synchronization performance is analyzed, The quantitative influence on the synchronization performance of the antenna pointing to the inaccuracy is obtained, and the simulation is carried out. The theoretical analysis and simulation results show that the timing synchronization of the satellite system is small when the antenna is not accurate, and the performance of the frequency synchronization is about 10-1-10-2 orders of magnitude.
【作者单位】：中国空间技术研究院通信卫星事业部;北京邮电大学电子工程学院;哈尔滨工程大学信息与通信工程学院;
【基金】：国家国际科技合作专项资助项目(2012DFA11410) 国家高技术研究发展计划项目(2012AA01A504)
【分类号】：TN927.23

【参考文献】