USING TIME-DIFFERENCE-OF-ARRIVAL TO DETECT A POSITION OF A TARGET TRANSMITTER
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United States of America Patent
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Issued Date -
Aug 14, 2014
app pub date -
Feb 6, 2014
filing date -
Feb 11, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Multiple time-difference-of-arrival units, each having two or more receiver antennas can be used to determine a location of a target transmitter without synchronizing or connecting together the units. Specifically, a clock on each unit can be used to determine a difference of arrival of radio-frequency signals amongst antennas on the units. Each unit's clock can be asynchronous with the clocks on the other units. Target estimation can therefore be achieved easily with limited wiring and the problems associated with synchronization can be reduced or eliminated. The multiple time-difference-of-arrival units can be used in indoor, outdoor (or a combination thereof) applications.
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