Method and system for maintaining a GNSS receiver in a hot-start state
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United States of America Patent
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Oct 7, 2014
Grant Date -
Jan 10, 2013
app pub date -
Sep 14, 2012
filing date -
Nov 13, 2008
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A GNSS receiver in a wake up state during a standby mode may acquire ephemeris from received GNSS signals such as GPS signals and/or GLONASS signals. When subsequently transitioning from the standby mode to a normal mode operating at a high frequency clock, the acquired ephemeris may be utilized to generate a navigation solution for the GNSS receiver. The GNSS receiver in the wake up state during the standby mode may be switched to operate at the high frequency clock in order to receive GNSS signals. The GNSS receiver may extract complete ephemeris from the received GNSS signals, and may subsequently transition from the wake up state to a sleep state during the standby mode to save power. Radio frequency front-end components of the GNSS receiver may only be turned on to receive the GNSS signals. The GNSS receiver may transition between the standby mode and the normal mode.
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