Method of and apparatus for message communication on Loran-C nav

Details Method of and apparatus for message communication on Loran-C nav Method of and apparatus for message communication on Loran-C nav

1987-11-03

1989-01-24

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Directive

Beacon or receiver

342390, 375 23, G01S 124, H03K 704

Patent

active

048003913

ABSTRACT:
In a Loran-C message communication system a method of obviating errors in navigation locking caused by sampling reception at the conventional symmetrical pulse modulation time intervals in advance of and in delay from the normal transmission interval, through rendering the pulse modulation assymetrical to a degree that compensates for different cycle amplitudes at sampling points above and below the desired sixth zero crossing used for navigation position determination.

REFERENCES:
patent: 3711725 (1973-01-01), Johannessen
patent: 3736590 (1973-05-01), Lipsey et al.
patent: 3774210 (1973-11-01), Mollod et al.
patent: 3889263 (1975-06-01), Johannessen
patent: 3921076 (1975-11-01), Currie
patent: 4001598 (1977-01-01), Johannessen
patent: 4151528 (1979-04-01), Johannessen
patent: 4392138 (1983-07-01), Jasper et al.
patent: 4423419 (1983-12-01), Johannessen
patent: 4482896 (1984-11-01), Menick
Radio Navigational Journal, Wild Goose Association, Acton, MA, 1975.
Walter N. Dean, "Clarinet Pilgrim System," The Magnavox Company Government and Industrial Group, Fort Wayne, Indiana; Sep. 30, 1973.
ITT Avionics Division, "Loran-C Phase Modulation Study, Final Technical Report," vol. I, Jun. 1970.
D. A. Feldman et al, "The Coast Guard Two Pulse Loran-C Communications System," Journal of the Institute of Navigation, vol. 23, No. 4, Winter 1976-1977, pp. 279-285.
"Proceedings of the Institute of Navigation National Marine Navigation Meeting," Hunt Valley, Maryland, Oct. 14-15, 1975.

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