Altitude coding for collision avoidance system

Details Altitude coding for collision avoidance system Altitude coding for collision avoidance system

1974-04-19

1976-03-30

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343112CA, G01S 956

Patent

active

039478459

ABSTRACT:
In a cooperative collision avoidance system for aircraft, an altitude encoding system serves as a discriminant to insure orderly sequence of data exchange between cooperative aircraft, particularly, in a dense traffic environment. The system includes means for generating pairs of pulse-interval coded signals spaced to represent altitude addresses from interrogator to responder aircraft. Responder aircraft reply with a single pulse to such an altitude address only if the responder aircraft is at the altitude corresponding to the address.

REFERENCES:
patent: 3603993 (1971-09-01), Follen et al.
patent: 3750168 (1973-07-01), Schrader et al.
patent: 3766552 (1973-10-01), Hajduk
patent: 3808598 (1974-04-01), Carter
patent: 3849782 (1974-11-01), Bond

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