毫米波通信系统中基于GPS的时统设计

A Study on GPS Command-and-control System of Time Synchronization in Millimeter Wave Digital Communication System

毫米波地面通信系统是典型的视距通信。目前我国使用的时统设备存在结构庞大、使用不够简便等缺点。GPS时统系统具有体积小、精度高、掉电不丢失数据等特点。利用GPS所提供的秒脉冲前沿为时间基准,通过DS3231把时间进一步细到微秒数量级,保证了跳频通信的可靠性和准确性。

DSP is applied to process the chips,and the hardware of GPS receiver module is devised.Besides,Efforts has been put to the design of DSP hardware circuits,including the interface circuit to Synchronization Clock Chip,Serial interface module circuit,and the power supply device.Based on the analysis of the application of DSP technique on the software developing methods and GPS navigation text of a telegram,the calculation of time,driving of microsecond-scale clock chip,and programming of interrupting the sub-program service are fulfilled.