浅析移动通信技术之伪卫星时间同步法

码分多址(CDMA)是一种由数字扩频通信技术发展而成的无线通信技术,其通过码序列相关性来实现多址通信。CDMA技术最初因战争需求进行研发,用于军事抗干扰通信之中,后被美国高通(Qualcomm)公司应用在商用蜂窝移动通信系统,CDMA技术自此快速发展,应用于多个领域场景。介绍的这种伪卫星定位系统时间同步方法便是基于CDMA这种移动通信技术发展而来,此时间同步法使地基伪卫星在不需要昂贵的原子钟做原子时间标准,不需要全球卫星导航系统做时基和不需要任何的差分校正技术的情况下,使地基伪卫星定位设备自主地时间同步到统一系统时基。

Analysis of Pseudolite Time Synchronization Method in Mobile Communication Technology

Code division multiple access is a wireless communication technology developed from digital spread spectrum communication technology,which realizes multiple access communication through code sequence correlation.CDMA technology was initially developed for war demand and used in military anti-jamming communication.Later,it was applied in commercial cellular mobile communication system by Qualcomm.Since then,CDMA technology has developed rapidly and applied in various fi elds.The time synchronization method of pseudolite positioning system introduced in this paper is based on CDMA mobile communication technology.The time synchronization method enables the ground-based pseudolite positioning equipment to automatically synchronize to the unifi ed system time base without expensive atomic clock as atomic time standard,global navigation satellite system as time base and any differential correction technology.