发明名称 |
DIRECTLY ACQUIRING PRECISION CODE GPS SIGNALS |
摘要 |
In general, the invention is directed to techniques for directly acquiring P-codes without first acquiring C/A-codes. For example, in one embodiment, a system comprises an assist server to track a P-code signal from a Global Positioning System (GPS) satellite and generate acquisition assistance information from the signal. The system further comprises a mobile unit to receive the acquisition assistance data from the assist server, and to acquire the P-code signal from the satellite based on the acquisition assistance data. The acquisition assistance data may include time-of-week data indicating an initial time offset into a P-code pseudorandom code sequence for the satellite. The mobile unit may include a reference generator to locally generate a reference pseudorandom code sequence based on the time-of-week data. |
申请公布号 |
WO03067279(A3) |
申请公布日期 |
2003.10.16 |
申请号 |
WO2003US03813 |
申请日期 |
2003.02.07 |
申请人 |
QUALCOMM, INCORPORATED |
发明人 |
MAURO, ANTHONY;KRASNER, NORMAN, F. |
分类号 |
G01S1/00;G01S5/00;G01S19/05 |
主分类号 |
G01S1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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