A Compensation Method of Timing Signals for Communications Networks Synchronization by using Loran Signals 


Vol. 34,  No. 11, pp. 882-890, Nov.  2009


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  Abstract

In this paper, we describe a compensation method that can be used for the situation where Loran receivers lose their phase lock to the received Loran signals when Loran signals are employed for the synchronization of national infrastructures such as telecommunication networks, electric power distribution and so on. In losing the phase lock to the received signals in a Loran receiver, the inner oscillator of the receiver starts free-running and the performance of the timing synchronization signals which are locked to the oscillator's phase is very severly degraded, so the timing accuracy under 1 us for a Primary Reference Clock (PRC) required in the International Telecommunications Union (ITU) G.811 standard can not be satisfied in the situation. Therefore, in this paper, we propose a method which can compensate the phase jump by using a compensation algorithm when a Loran receiver loses its phase lock and the performance evaluation of the proposed algorithm is achieved by the Maximum Time Interval Error (MTIE) of the measured data. From the performance evaluation results, it is observed that the requirement under 1 ㎲ for a PRC can be easily achieved by using the proposed algorithm showing about 0.6 ㎲ with under 30 minutes mean interval of smoothing with 1 hour period when the loss of phase lock occurs.

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  Cite this article

[IEEE Style]

Y. Lee, C. Lee, S. Yang, J. Lee, H. Kong, "A Compensation Method of Timing Signals for Communications Networks Synchronization by using Loran Signals," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 11, pp. 882-890, 2009. DOI: .

[ACM Style]

Young-kyu Lee, Chang-bok Lee, Sung-hoon Yang, Jong-gu Lee, and Hyun-dong Kong. 2009. A Compensation Method of Timing Signals for Communications Networks Synchronization by using Loran Signals. The Journal of Korean Institute of Communications and Information Sciences, 34, 11, (2009), 882-890. DOI: .

[KICS Style]

Young-kyu Lee, Chang-bok Lee, Sung-hoon Yang, Jong-gu Lee, Hyun-dong Kong, "A Compensation Method of Timing Signals for Communications Networks Synchronization by using Loran Signals," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 11, pp. 882-890, 11. 2009.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880