Radio position determining apparatus

Details Radio position determining apparatus Radio position determining apparatus

1975-04-30

1976-11-30

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

G01S 506

Patent

active

039952738

ABSTRACT:
Apparatus is provided to determine the relative shift of position of a vehicle carrying a transmitter transmitting at a predetermined frequency. A plurality of receivers are positioned to receive the signal transmitted, and each includes a counter for advancing a count representative of the number of cycles of signal received. A computer receives the counts from the receiver to determine the relative shift of vehicle position. Preferably, a reference transmitter is provided for transmitting a reference signal of predetermined frequency, which, when processed with the signal received from the vehicle, provides a difference or "beat" frequency which provides the basis for cycle counting at a reduced rate.

REFERENCES:
patent: 1562485 (1925-11-01), Affel
patent: 3060426 (1962-10-01), Williams
patent: 3757340 (1973-09-01), Rogoff

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