Computer Science
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.340..143d&link_type=abstract
In ESA, Frequency and Time Forum p 143-147 (SEE N93-24978 09-70)
Computer Science
Atomic Clocks, Delay, Modems, Rangefinding, Spread Spectrum Transmission, Synchronism, Time, Time Measurement, Binary Phase Shift Keying, Communication Satellites, Comparison, Correlation, Microwave Transmission, Phase Coherence, Quadrature Phase Shift Keying, Signal To Noise Ratios, Synchronous Satellites
Scientific paper
A study illustrating the two way time transfer technique and describing the use of this technique with the MITREX (Microwave Time and Range Experiment) SATRE (Satellite Time and Range Experiment) modems is presented. The two way time transfer technique via geosynchronous telecom satellites is one of the most accurate methods for synchronization and comparison of remote clocks. Most of the unknown propagation delays can be eliminated by the two way principle. The use of a coherent spread spectrum technique with a truncated pseudonoise code offers a resolution better than 30 ps of the measured time interval. The receiver is built around a Delay Locked Loop (DLL), which correlates the received signal with the known PN sequence to derive the control signal of the loop. In the locked state both PN sequences are synchronous and tracking errors of less than 30 ps are possible. Results showing the accuracy of the modem depending on signal to noise ratio and variation of total input power levels are presented and show that the expected improvement of the jitter of the internal delay by an increase of the chip rate is possible.
No associations
LandOfFree
A new modem for microwave time synchronisation via geosynchronous telecommunication satellites does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A new modem for microwave time synchronisation via geosynchronous telecommunication satellites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A new modem for microwave time synchronisation via geosynchronous telecommunication satellites will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1203672