Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating
Patent
1998-01-26
2000-04-25
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Directive
Position indicating
342464, G01S 302
Patent
active
060549505
ABSTRACT:
An ultra wideband (UWB) or short-pulse transmission system that enables precise tracking or geolocation of a target over distances of several kilometers. The system includes a set of N (where N>2) untethered UWB transceivers located at fixed positions, an untethered UWB receiver at the target, and a processor at the target for resolving time-of-flight measurement ambiguities of received pulses to determine precise geolocation by solving a set of equations according to time-of-flight measurements and surveyed positions of N-1 transceivers. To eliminate a clock distribution system, self-synchronizing of pulse timing is achieved by generating a start pulse at one of the untethered transceivers. Alternatively, a timing source may be provided by a GPS or other timing generator at the transceivers in order to synchronize emissions of their pulses.
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Hellner Mark
Multispectral Solutions, Inc.
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