测试场时统设备误差分析及处理技术

针对测试场对试验控制信息、时间信息和准频率信息要求较高的特点,设计了基于GPS授时的时间统一系统。在简要介绍时统设备组成的基础上,对影响系统的误差因素进行了分析,着重从调制解调方面讨论了B码终端误差,从系统同步和失步方面讨论了守时误差;提出了从增强B码解调器适应能力、时统守时精度、取样信号时刻精度三个方面减小时统误差的处理措施,指出系统设计中通过合理进行误差分配,控制显著误差,可实现系统的技术性能和经济性能的统一。

Error analysis and processing technique of time synchronization equipment in test range

According to the characteristic that the test range has serious requirements for experiment control information, time information and frequency information,a GPSbased time synchronization system is proposed. The composition of the time synchronization system is introduced. The equipment error factors are analyzed. The terminal error of B code is discussed in modulation and demodulation emphatically. The timing error is discussed focusing on system synchronization and outofsynchronization. A measure to mitigate time synchronization error by improving the adaptability of B code demodulator,time synchronization accuracy and sampling signal time precision is proposed. It is pointed out that a wellbalanced tradeoff between technical performance and economic affordability can be realized with rational distribution of error and control of notable error.