On the Computation of Cell Propagation Delays in GEO Multi-beam Satellite Communications System
In order to overcome delay-sensitive shortcoming of satellite communications system based on Time Division Duplex mode, a scheme of acquiring propagation delay of any place within a spot beam is proposed. It is accurately calculated by space geometric model according to the satellite position ranging results by three calibration stations. Based on actual system parameters in China, the influence on radio frame design and synchronization problem by using midpoint propagation delay as synchronization reference time instead of average propagation delay is analyzed. The result shows that this approximation can not only reduce the computational complexity, but also ensure the adaptability of TD-SCDMA radio frame structure in GEO satellite communications system.
Multi-beam satellite communications system geosynchronous satellite average propagation delay Time Division Duplex
Xianghui Hu XiLuan Shubo Ren Jianjun Wu
China Electronic System Engineering Company Beijing, China Satellite and Wireless Communication Lab, EECS, Peking University Beijing. China
国际会议
太原
英文
251-254
2011-02-26(万方平台首次上网日期,不代表论文的发表时间)