Automatic synchronization for receivers of a navigational system

Details Automatic synchronization for receivers of a navigational system Automatic synchronization for receivers of a navigational system

1978-12-26

1981-06-30

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

G01S 130

Patent

active

042765528

ABSTRACT:
An essentially worldwide navigational network (Omega) operating at a very low frequency in an internationally allocated navigational band in the electromagnetic spectrum is provided with a receiver capable of automatic synchronization. The RF signal is detected by counting the cycles in the output of the signal tracking means in a preset short time interval and comparing the count to a threshold value. Automatic receiver synchronization synchronizes the intervals generated in the receiver with the received signals. Logic circuitry shifts the timing in Omega to relate the receiver segment timing with the detected signals.

REFERENCES:
patent: 3789408 (1974-01-01), Ichihara et al.
patent: 3852751 (1974-12-01), Wood et al.
patent: 3890619 (1975-06-01), Mounce
patent: 3900876 (1975-08-01), Tsukada et al.

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