Providing global positioning system (GPS) timing signals to remote cellular base stations
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United States of America Patent
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Jul 7, 2009
Grant Date -
Mar 30, 2006
app pub date -
Sep 30, 2004
filing date -
Sep 30, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In a cellular network, a GPS receiver includes circuitry that modulates a global positioning system (GPS) timing pulse signal with a carrier signal and transmits the modulated signal to one or more remote base stations. When the modulated timing pulse signal is received at a remote base station it is demodulated and a timing pulse signal corresponding to the GPS timing pulse signal is recovered. The remote base station may be configured to transmit a reply signal back to the GPS receiver, which can then be used to estimate a propagation delay between the GPS receiver and the remote base station.
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