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Class Information
Number: 342/397
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Directive > Beacon or receiver > With transmisson of bearing or position determinative signals > Iso-phase type > Decca
Description: Subject matter wherein sets of hyperbolic lines of position are determined by comparison of the phase of (1) one reference continuous wave signal from a centrally located master transmitter with (2) each of several continuous wave signals from plural slave transmitter located in a star pattern, each about 70 nautical miles (130 kilometers) from the master.

Patents under this class:

Patent Number Title Of Patent Date Issued
4584580 Apparatus for rejecting jamming waves Apr. 22, 1986
4024383 Method and system for navigation employing incremental range difference May. 17, 1977
3981015 Phase locking of time-sequential transmission from spaced transmitters in a phase comparison naviagation system Sep. 14, 1976
3974502 Phase comparison radio navigation system receiver having phase memory oscillators for phase locking to time-sequentially received transmissions Aug. 10, 1976
3974503 Phase comparison radio navigation system with time-sequenced transmissions from spaced stations using selectable phase memory oscillators in a receiver Aug. 10, 1976
3973261 Synchron timing of signals in spaced transmitters and in a receiver for a phase comparison navigation system using time sequential transmissions Aug. 3, 1976

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