Title: Synchron timing of signals in spaced transmitters and in a receiver for a phase comparison navigation system using time sequential transmissions

Abstract: In a phase comparison radio navigation system using transmissions from spaced stations in a time-sequence, for synchronising the timing of the transmissions, and for synchronising switching in a receiver, the timing control means include digital counting means counting down from the output of an oscillator phase locked to one of the received signals, and a timing identification signal is transmitted from one station for initially synchronising the counter timing.

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Inventors: Phipps, Derek John (London, EN)

Application Number: 524199
Filing Date: 1974-11-15
Publication_date: 1976-08-03
Assignee: Decca Limited (London, EN)
Primary Class(es): 342/397
Other Classes:
US Patent Ref:

3689925	Sep, 1972	Hulland	343/105.
3761932	Sep, 1973	Fujimoto	343/105.

Other Refs:
Primary Examiner: Wilbur, Maynard R.
Assistant Examiner: Berger, Richard E.
Attorney: Connors; Edward F.