摘要
在低轨卫星通信系统中,低轨卫星的高速运动给时分多址接入中的系统定时带来了较大的影响。为了提高系统定时精度和系统效率,分析了低轨卫星运动的特点和系统定时原理,提出基于低轨卫星运动模型辅助的开环系统定时跟踪方法,并进行了仿真。仿真结果表明,该方法能够对低轨卫星的运动和终端的系统定时进行较好的跟踪,克服了低轨卫星高速运动带来的影响。
In the low-orbit satellite communication system,the high speed motion of low orbit satellite brings great influence on the system timing in time division multiple access(TDMA).In order to improve the system timing precision and system efficiency,the characteristics of low-orbit satellite motion and the principle of system timing are analyzed.An open-loop system timing tracking method is proposed based on the motion model of low-orbit satellite.The simulation results show that the proposed method tracks the motion of low-orbit satellite and the system timing of the terminal,and overcomes the influence of high speed motion of low-orbit satellite.
作者
朱晋飞
程剑
ZHU Jinfei;CHENG Jian(Army Engineering University of PLA,Nanjing 210000,China)
出处
《移动通信》
2019年第11期88-93,共6页
Mobile Communications
