发明名称 |
OSCILLATOR FREQUENCY CORRECTION IN GPS SIGNAL ACQUISITION |
摘要 |
A method (50) for correcting oscillator frequency error in GPS signal acquisition includes a first step (52) of receiving at least one broadcasted GPS signal. A next step (54) includes estimating a plurality of Doppler offsets. A next step (56) includes correlating the signal to produce a Doppler modulation for each of the plurality of Doppler estimates. A next step (58) includes calculating a magnitude separation of peak and null states of each modulation. A next step (60) includes searching the peak and null separation to finding the Doppler estimate producing the largest magnitude separation in peak and null states. The found Doppler estimate defines a frequency error estimate for the at least one broadcasted GPS signal, which will be common across all satellites.
|
申请公布号 |
US2003201935(A1) |
申请公布日期 |
2003.10.30 |
申请号 |
US20020136084 |
申请日期 |
2002.04.30 |
申请人 |
KING THOMAS M.;GEIER GEORGE J.;KIAEI SAYFE |
发明人 |
KING THOMAS M.;GEIER GEORGE J.;KIAEI SAYFE |
分类号 |
G01S19/25;G01S1/00;(IPC1-7):G01S5/14 |
主分类号 |
G01S19/25 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|