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METHOD FOR ESTIMATING GPS REFERENCE FREQUENCY DRIFT FROM VCO-BURST OF PDC HANDSET
METHOD FOR ESTIMATING GPS REFERENCE FREQUENCY DRIFT FROM VCO-BURST OF PDC HANDSET
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机译:从PDC手机的VCO突发估计GPS参考频率漂移的方法
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摘要
PROBLEM TO BE SOLVED: To provide a method for estimating Global Positioning System (GPS) reference frequency drift from Voltage-Controlled Oscillator (VCO) burst of a Personal Digital Cellular (PDC) handset.;SOLUTION: A combination product of mobile phone and NAV satellite receiver is provided with a circuit for compensating the reference frequency drift of a GPS receiver, by using VCO burst information periodically received at the PDC handset. By having the reference frequency drift of the GPS receiver compensated, stable operation of both high-speed initialization and positional solution are made available to users. A GPS numerical controlled type oscillator (NCO) receives the VCO sample of the PDC handset.;COPYRIGHT: (C)2005,JPO&NCIPI
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