Title :
Clock stability measure dependence on time error sampling period
Author :
Bregni, Stefano ; Carbonelli, Marco ; De Seta, Domenico ; Perucchini, Daniele ; Zampilloni, Guido
Author_Institution :
Div. of Network Technol., SIRTI SpA, Cusano, Italy
fDate :
28 Nov- 2 Dec 1994
Abstract :
The introduction of SDH based networks rises new important synchronization issues to be carefully investigated. In particular, the telecommunication standard bodies are mainly considering, for the specification of clocks, five frequency stability quantities: Allan (1991) variance, modified Allan variance, time variance, root mean square of the time interval error and maximum time interval error. The influence of time error measurement sampling period on the behaviour of these quantities is analyzed. Computer simulation and experimental measurement results are reported. With the aim of providing useful information for specification design. The results obtained show that the modified Allan variance and time variance behaviour is substantially dependent on the chosen measurement sampling period in the observation interval regions where white phase noise dominates
Keywords :
clocks; frequency stability; measurement errors; phase noise; signal sampling; synchronous digital hierarchy; telecommunication networks; time measurement; white noise; Allan variance; SDH based networks; clock stability measure; clocks specification; computer simulation results; experimental measurement results; frequency stability; maximum time interval error; modified Allan variance; observation interval regions; root mean square; specification design; synchronization issues; telecommunication standard bodies; time error measurement sampling period; time interval error; time variance; white phase noise; Clocks; Computer errors; Computer simulation; Frequency synchronization; Root mean square; Sampling methods; Stability; Synchronous digital hierarchy; Telecommunication standards; Time measurement;
Conference_Titel :
Global Telecommunications Conference, 1994. GLOBECOM '94. Communications: The Global Bridge., IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-1820-X
DOI :
10.1109/GLOCOM.1994.513017
