Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Patent
1988-07-06
1990-09-25
Issing, Gregory C.
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
364452, G01S 124, G01C 2100
Patent
active
049596551
ABSTRACT:
A method and a device for the radiolocation of a vehicle carrying said device, wherein the radiolocation is performed by measuring the differences between the times for receiving radiofrequency signals transmitted by two transmitting stations geographically far away from each other, of at least one group of stations, each group comprising at least two transmitting stations including one master transmitter-forming station and at least one slave transmitter-forming station controlled by the master transmitter, each station transmitting a series of close electric pulses which are time-shifted in a predetermined way with respect to the series of pulses transmitted by the other stations, during a predetermined period of time, the method being characterized in that the acquisition of the signals and the measurement of the difference between the times for receiving the signals transmitted by transmitting stations of two different groups are performed in a unique receiving channel by performing the acquisitions and measurements of the signals transmitted by stations of one group during the predetermined period of time specific of this group and by performing the said acquisition and measurement of the signals of the transmitting stations of the second group during the interval of time which has been left available by the acquisition and measurement of the signals from the first group, during the period specific of this first group.
REFERENCES:
patent: 3493970 (1970-02-01), Knauth
patent: 3701018 (1972-10-01), Groth, Jr.
patent: 3947849 (1976-03-01), Fehlner et al.
patent: 4670759 (1987-06-01), Fukuhara
The ONI-7000 Airborne Loran-C System (Marchal et al.) IEE, 1982 Position Location and Navigation Symposium pp. 333-338.
In the Rho-Rho Mode (Marchal et al.) Under Sea Technology vol. 12, Apr. 1971 No. 4 pp. 16-19.
Issing Gregory C.
MLR Electronique
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