机动定位平台间时间同步系统的误差分析与控制

Accuracy Analysis and Improvement of Time Synchronization Technique for Mobile Locating Systems

高精度双向时间同步是分布式机动无源定位系统的一项关键技术。结合机动平台的特点,对基于伪码相位测量的双向时间同步系统的误差来源和影响误差的因素进行了分析,并针对其中一些引起误差的主要因素给出了控制误差的有效方法。仿真和实测表明,最终可以在机动平台间实现0.2 ns左右的时间同步精度。

High accuracy two-way timing synchronization is a key technique for distributed mobile passivelocating system. According to the characteristic of mobile platforms,the timing error source of the two-waytime synchronization based on pseudo code phase-difference measurement is analyzed. Several effectivemethods to increase accuracy are introduced. Finally,both simulation and experimental result prove thatthe synchronization accuracy can be controlled around 0. 2 ns.