Title: Phase comparison radio navigation system with time-sequenced transmissions from spaced stations using selectable phase memory oscillators in a receiver

Abstract: In a phase comparison radio navigation system in which phase-locked signals are radiated from spaced stations to be compared in phase in a receiver, the receiver has a separate phase memory oscillator for each received signal, the phase memory oscillators operating at the same frequencies (apart from differences due to Doppler shifts) and being locked to their respective signals from the transmitting stations and display units are provided each with selector means enabling any display unit to effect phase comparison between any pair of outputs from the memory oscillators. BACKGROUND OF THE INVENTION

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Phipps, Derek John (London, EN)

Application Number: 524198
Filing Date: 1974-11-15
Publication_date: 1976-08-10
Assignee: Decca Limited (London, EN)
Primary Class(es): 342/397
Other Classes:
US Patent Ref:

3689925	Sep, 1972	Hulland	343/105.
3852751	Dec, 1974	Wood et al.	343/105.

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