Estimating GPS reference frequency drift from PDC-handset...

Details Estimating GPS reference frequency drift from PDC-handset... Estimating GPS reference frequency drift from PDC-handset...

2007-05-29

2007-05-29

Urban, Edward F. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S265000, C455S310000, C342S357490

Reexamination Certificate

active

10650383

ABSTRACT:
A combination mobile phone and navigation satellite receiver comprises a circuit for correcting GPS receiver reference frequency drift by using VCO burst information periodically received by a PDC handset. A corrected GPS receiver reference frequency drift then enables faster initialization and stable operation of the position solutions made available to users. A GPS numeric controlled oscillator (NCO) receives a PDC handset VCO sample.

REFERENCES:
patent: 6064336 (2000-05-01), Krasner
patent: 6122506 (2000-09-01), Lau et al.
patent: 6819707 (2004-11-01), Abraham et al.
patent: 6973121 (2005-12-01), Eberlein et al.
patent: 2001/0028321 (2001-10-01), Krasner
patent: 2003/0068977 (2003-04-01), King
patent: 2003/0154025 (2003-08-01), Fuchs et al.
patent: 2004/0142701 (2004-07-01), Abraham
patent: 1 092 987 (2001-04-01), None

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