SYSTEM, METHOD AND COMPUTER PROGRAM FOR ULTRA FAST TIME TO FIRST FIX FOR A GNSS RECEIVER
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United States of America Patent
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Issued Date -
Nov 22, 2012
app pub date -
Jan 27, 2011
filing date -
Jan 27, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides a system, method and computer program for a GNSS receiver that is operable to provide an ultra fast Time To First Fix (TTFF). The invention is implementable without requiring the decoding of a navigation message transmitted by GNSS satellite systems. The system of the present invention may comprise a parameter obtaining means, a clock obtaining means and a Fast TTFF engine. The parameter obtaining means may obtain satellite parameters of one or more GNSS satellites. The clock obtaining means may obtain a clock for estimating a GNSS time tag. The Fast TTFF engine may be linkable to a signal interface that is operable to provide I/Q samples from a GNSS antenna. The Fast TTFF engine may comprise a measurement generation utility, a coarse search utility and a fine search utility. The measurement generation utility may compute the Doppler frequency shift and the code phase of the one or more GNSS satellites based on the I/Q samples.
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