Pulse-hyperbolic location system using three passive beacon meas

Details Pulse-hyperbolic location system using three passive beacon meas Pulse-hyperbolic location system using three passive beacon meas

1980-10-28

1983-08-09

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343112D, G01S 124

Patent

active

043981984

ABSTRACT:
A radar system is used to locate a vehicle's position on a predetermined X, Y grid, which could be latitude and longitude. Several paths of different lengths link the vehicle with a master station which transmits cyclically recurring pulses. Equipment on the vehicle compares the propagation time required for the pulses to travel over each of the several paths. The compared times are then used by a microprocessor to calculate the position of the vehicle. The several paths are identified by a use of repeater stations which may selectively drop predetermined ones of the cyclically recurring pulses and retransmit the rest. For example, one repeater may retransmit every second recurring pulse and another repeater may retransmit every third recurring pulse.

REFERENCES:
patent: 2837738 (1958-06-01), Van Valkenburgh
patent: 2971190 (1961-02-01), Busignies
patent: 3212091 (1965-10-01), Bissett et al.
patent: 3328565 (1967-06-01), Prichodjko
patent: 3705403 (1972-12-01), Hughes
patent: 3928852 (1975-12-01), Barker
patent: 4229737 (1980-10-01), Heldwein et al.

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