Embedded System of Time Uniform Based on DSP
We introduced a design method of DSP-based System of time uniform, which combine the GPS and the Compass to calibrate the time. The system can use UTC (Coordinated Universal Time) of the GPS or the Compass for time base, to generate absolute time and different frequency of synchronous signals. We used DSP (Digital Signal Processor) to calculate the satellite information which includes the UTC time. After getting the UCT time information, put it into the CPLD (Complex Programmable Logic Device) for correction of time delay and serialization to output Meanwhile, we divided 1PPS (one-pulse-per-second) signal of the GPS and the Compass into 20Hz, SOHz, and 800Hz synchronous signal. And we analyzed the precision of time and frequency. To conclude, the uncertainty of system absolute time is less than 100ns, the uncertainty of system synchronous signals is less than 20ns.This system is easy and flexible for use, stable and reliable in performance.
DSP CPLD GPS Compass
Ning Li Li-hong Guo Ning Li Juan Chen Chun-xiang Liu
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Science CIOMP Changchu Graduate School of the Chinese Academy of Science GSCAS Beijing, China Changchun University Of Technology CCUT Changchun, China Changchun University of Science and Technology CUST Changchun, China
国际会议
长春
英文
156-158
2010-08-24（万方平台首次上网日期，不代表论文的发表时间）