Multi-tone DGPS beacon transmitter and receiver

Details Multi-tone DGPS beacon transmitter and receiver Multi-tone DGPS beacon transmitter and receiver

1996-06-05

1998-04-28

Issing, Gregory C.

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

Directive

Including directive communication system

342357, 455 59, 455 65, H04B 700, H04B 100, H04B 110, G01S 502

Patent

active

057450757

ABSTRACT:
An apparatus and a method for transmitting and receiving a signal having multiple tones for obviating destructive interference between a groundwave and a skywave of the signal. The multiple tones have a frequency offset that is calculated so that the destructive interference nulls for each of the tones occurs at different range distances from the transmitter thereby extending the distance over which at least one of the tones can be reliably received.

REFERENCES:
patent: 2278779 (1942-04-01), Hansell
patent: 3361970 (1968-01-01), Magnuski
patent: 4628517 (1986-12-01), Schwarz et al.
Beser et al, "The Application of Navstar Differential GPS in the Civilian Community", Navigation, vol. II, 1984, pp. 167-196.

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