高速运动环境TDMA卫星通信同步控制技术

Synchronization Technique of TDMA Satellite Communication in High-speed Movement

分析了高速运动对TDMA卫星通信系统造成的影响,提出一种适用于高速运动环境的TDMA卫星通信同步控制技术。利用装载平台的导航信息辅助实现多普勒频偏的快速捕获,结合TDMA卫星通信特点完成多普勒频偏的跟踪补偿,同时使用多普勒频偏估计并修正运动引起的定时误差,可以在不改变TDMA卫星通信网现有其他设备技术状态的情况下,消除高速运动产生的影响,实现高速运动环境下TDMA卫星通信终端的快速入网和同步保持。

This paper analyzes the influence of high-speed-caused Doppler drift and timing drift on TDMA satellite communication system,and proposes a synchronization technique of TDMA satellite communication system in high-speed movement, which realizes faster signal acquisition through navigation information from platform. Combining with features of TDMA satellite communication, the tracking and compensation of Doppler drift is implemented, meanwhile, the timing control is corrected according to the timing error estimated by Doppler drift. This technique eliminates high-speed effect and realizes fast access to network and synchronization without changing any technique configuration in present TDMA satellite communication network.