Methods and means for providing improved air/ground radio teleph

Details Methods and means for providing improved air/ground radio teleph Methods and means for providing improved air/ground radio teleph

1980-10-24

1983-12-06

Chin, Tommy P.

Telecommunications

Transmitter and receiver at separate stations

Optimum frequency selection

455 67, 455 56, 455226, 179 2EB, H04B 1700, H04B 726

Patent

active

044197667

ABSTRACT:
An improved system and method for providing air/ground communications compatible with ground based telephone systems.
The airborne equipment incorporates means for comparing signals received from various ground stations located along the flight path so as to allow the selection of the "best" signal to provide good telephone communications service for a reasonable length telephone conversation.

REFERENCES:
patent: 2976411 (1961-03-01), Kahn
patent: 3134103 (1964-05-01), Flower
patent: 3206679 (1965-09-01), Miller
patent: 3434056 (1969-03-01), Becker
patent: 3487312 (1969-12-01), Egan
patent: 3543161 (1970-11-01), Hatton
patent: 3628149 (1971-12-01), Swan
patent: 3860872 (1975-01-01), Richardson
patent: 3973203 (1976-08-01), Kahn
patent: 4140973 (1979-02-01), Stevens
Air/Ground Radiotelephone System, Airfone Inc., transmitted to FCC on Oct. 25, 1979.
System Planner, Motorola, R4-1-68, Published Dec. 1976, pp. 1-66.
Technical Characteristics of an SSB Public Radiotelephone System Operating within the Frequency Bands 454.675-455.000 MC/S and 459,675-460.000 MC/S, Document No. DO-130, Radio Technical Commission for Aeronautics, printed 11/23/65.
Public Air/Ground Radiotelephone System, Document No. DO-125, Radio Technical Commission for Aeronautics, 7/31/64.

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