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长春光学精密机械与物... [1]
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会议论文 [1]
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2010 [1]
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Embedded system of time uniform based on DSP (EI CONFERENCE)
会议论文
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Li N.
;
Guo L.-H.
;
Chen J.
;
Liu C.-X.
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提交时间:2013/03/25
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
50Hz
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. 2010 IEEE.
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