Communications: directive radio wave systems and devices (e.g. – Determining distance – With remote cooperating station
Patent
1992-05-04
1993-06-15
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Determining distance
With remote cooperating station
342127, G01S 1326
Patent
active
052203328
ABSTRACT:
A range finding system uses non-simultaneous measurements between two communicating and cooperating instruments such that a single carrier frequency is used to exchange information between the instruments with non-simultaneous transmission using the same transmission channel. The range finding system may be considered to be an interrogator/transponder arrangement in which the results of a phase measurement against a local clock is made at one transponder station during one time interval, and then the transponder transmits both a tone derived from the transponder's local clock and the measurement results back to the interrogator station during a second time interval. The interrogator then has everything it needs to accurately compute the range while eliminating local delays in clock differences, while permitting the interrogator and the transponder to share a single frequency intermittently.
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Beckner Frederick L.
Ingram Darrell K.
Cyberdynamics, Inc.
Griggs Dennis T.
Sotomayor John B.
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