Double-channel satellite navigation system

Details Double-channel satellite navigation system Double-channel satellite navigation system

1979-05-07

1981-08-25

Blum, Theodore M.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343100ST, G01S 502

Patent

active

042862701

ABSTRACT:
The double-channel satellite navigation system according to the invention comprises two identical channels whereof each contains a mixer. The inputs of the two mixers receive the high and low frequency components, respectively, of a double-frequency signal sent by a navigation satellite. Each of the mixers has its output connected to the input of a phase detector. Each of the channels further contains an extrapolator and a commutator which are placed in series. The output of the phase detector is electrically connected to the input of the extrapolator and a second input of the commutator whereof the output is connected to the input of a voltage-controlled oscillator. Finally, the system includes a signal level analyzer intended to analyze the level of signals arriving from the navigation satellite. The signal level analyzer has its output connected to a second input of the extrapolator and a third input of the commutator.

REFERENCES:
patent: 3696427 (1972-10-01), Nard

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