Channel encoding for distance measurement equipment

Details Channel encoding for distance measurement equipment Channel encoding for distance measurement equipment

1975-04-04

1977-03-01

Tubbesing, T.H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 65LC, 343 172PC, G01S 956

Patent

active

040104656

ABSTRACT:
An adapter is provided for insertion between a conventional DME airborne interrogator and antenna. The adpater converts conventional interrogations into phase-coded or amplitude coded signals which are received by new Microwave Landing System (MLS) transponders. Each transponder will process interrogations having the correct code and frequency and will respond with precision reply signals. The precision replies are then received by the airborne equipment, converted back to standard reply pulses and processed to provide distance measurement. Also provided is a new transponder for use at MLS sites.

REFERENCES:
patent: 3418581 (1968-12-01), Kennedy et al.
patent: 3573819 (1971-04-01), Mason et al.
patent: 3825929 (1974-07-01), Toman
patent: 3870993 (1975-03-01), Biagi et al.
patent: 3900873 (1975-08-01), Bouvier et al.

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