基于北斗的高精度时空服务设备的研制

The Design of High-Precision Space-time Service Device Based on Beidou

摘要:

为提供基于北斗的高精度授时/定位服务,设计了一种小型化、多通路的时空服务设备。该设备采用高性能多核DSP和FPGA作为主处理器,实时采集和处理北斗卫星数据,从而为终端提供精准的北斗时间/位置,以及北斗短报文通信功能。同时,利用设备内部高性能恒温晶振产生与北斗时间高度同步的时间基准,为卫星失锁时提供可靠的守时数据。此外,为满足不同设备使用需求,主处理器进行了多种类型接口的扩展。经多台设备试验证明,该设备提供的授时、守时以及位置等各项信息精度指标均满足设计要求。

Abstract:

In order to supply high-precision time and position based on Beidou, we design the space-time service device which has smaller size and multiple interface. The MCU of the device is high-performance multi-core DSP and FPGA. The device collects and deals the datas supplied by Beidou satellite, and supplies accurate Beidou time and position, and Beidou short Message. Meanwhile, inorder to supply reliable time data when Beidou satellite lost, the device supplies the 1pps synchronously with Beidou 1pps through OCXO. Moreover, inorder to meet the needs of various devices, the MCU extends the interfaces. Tests verified , the indexes of the time and position data supplied by the device can satisfied design requirements.