Cellular telephone using pseudolites for determining location
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United States of America Patent
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-
Nov 2, 2004
Issued Date -
N/A
app pub date -
Jan 31, 2003
filing date -
Dec 1, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A cellular telephone having a global positioning system (GPS) receiver using a blended combination of GPS signals from GPS satellites and GPS pseudolites for determining a location. The cellular transceiver receives wireless downlink cellphone signals having acquisition aiding information including GPS-based time; ephemeris orbital parameters for GPS satellites; and pseudorandom (PRN) codes, locations, and signal characteristics used by GPS pseudolites in the local vicinity. The GPS receiver in the cellular telephone uses the acquisition aiding information for speeding the time to the first location fix.
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Family
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