摘要
在多模导航模拟器设计过程中,针对控制信息数据包和中频板卡信号产生时间同步控制的问题,设计了一种应用于基于软件无线电体系架构多模导航信号模拟器的时间同步控制系统;该系统通过由系统计时板对外设板卡同步触发启动控制,驱动软件与外设板卡1 s时隙同步控制,以及驱动软件向外设板卡传输数据包的同步控制,实现对各系统频点的时间同步控制;通过联合定位测试结果表明,采用该控制系统的多模导航模拟器的各系统频点的输出信号是时间同步的,并且该控制系统还具有各系统频点时间同步精度高和系统复杂度低等优点。
In the process of the design of multi--mode GNSS signal simulator, aiming at the problems that how to rectify the unsynchro- nized packets and how to generate time--synchronized intermediate--frequency signal by controlling difference IF boards, an algorithm for the time synchronization control based on GNSS signal simulator was proposed, which can be applied to the GNSS signal simulator adopting the software radio system architecture. Meantime, the control of generating synchronous IF signal by the peripheral boards by the system timing board, the control of 1 s slot synchronization of driver software and peripheral boards and the control of packet synchronization that diver software transmitted to the peripheral boards were used to carry out the time synchronization control of different satellite navigation sys- tem. By the multi--satellite joint location test, it is proved that the output signal of multi--mode GNSS signal simulator is time synchroniza- tion. In addition, the proposed algorithm exhibits the advantages of high time synchronization precision and low system complexity.
出处
《计算机测量与控制》
2015年第12期4019-4022,共4页
Computer Measurement &Control
基金
国家高技术研究发展计划(863)(2011AA120501)
关键词
多模导航
时间同步
联合定位
multi-- mode navigation
time synchronization
multi-- satellite joint location
