07558356 is referenced by 55 patents and cites 59 patents.

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.

Title
Providing global positioning system (GPS) timing signals to remote cellular base stations
Application Number
10/954864
Publication Number
7558356 (B2)
Application Date
September 30, 2004
Publication Date
July 7, 2009
Inventor
Theodore O Grosch
Bolton
MA, US
Michael D Pollman
Londonderry
NH, US
Agent
Fish & Richardson P C
Assignee
Airvana
MA, US
IPC
H04L 7/00
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