OVERVIEW OF TIMING/SYNCHRONIZATION FOR DIGITAL COMMUNICATIONS SYSTEMS

Harris A. Stover

Abstract:	Digital technology is being applied to conmunications at a very rapidly increasing rate. Use of digital communications (transmission, multiplexing, and switching) results in a timing/synchronization problem not encountered in analog communications systems. This overview explains the need for timing/synchronization of digital communications systems in general, and switched systems in particular. It points out some of the criteria that greatly influence timing/synchronization subsystem design for a military communications network but have little or no significance for civil systems. The results of previous studies by DCA and its contractors are summarized and the rationale for the current study being reported in other presentations in this session is provided. In this approach, timing techniques are evaluated in terms of fundamental features. Different combinations of these features would cover most possibilities from which a synchronous timing system could be chosen. Although the studies described in this session were intended for application to the Defense Communications System, the problems of an extensive worldwide military Communications system tend to encompass the problems of other digital communications systems, both military and civilian.
Published in:	Proceedings of the 10th Annual Precise Time and Time Interval Systems and Applications Meeting November 28 - 30, 1978 Goddard Space Flight Center Greenbelt, Maryland
Pages:	393 - 403
Cite this article:	Stover, Harris A., "OVERVIEW OF TIMING/SYNCHRONIZATION FOR DIGITAL COMMUNICATIONS SYSTEMS," Proceedings of the 10th Annual Precise Time and Time Interval Systems and Applications Meeting, Greenbelt, Maryland, November 1978, pp. 393-403.
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