发明名称 |
METHOD AND APPARATUS FOR ESTIMATING GPS TIME |
摘要 |
<p>A method of providing an estimate of GPS time from non-GPS timing information present in communications signals transmitted from a base station (BS1) to a first mobile communications device (MS1) is provided comprising the steps of (i) in a second mobile communications device (MS2), receiving corresponding non-GPS timing signals present in communications signals transmitted by the base station; (ii) in a GPS receiver (23, 24) of the second mobile communications device (MS2), obtaining at least one pseudorange to a GPS satellite (GPS SV) and obtaining an first estimate of GPS time; (iii) deriving a relationship between the receipt of timing signals received in step (i) and the estimate of GPS time obtained in step (ii); and (iv) from the non-GPS timing information received by the first mobile communications device (MS1) and the relationship derived in step (iii), calculating a second estimate of GPS time.</p> |
申请公布号 |
EP1412770(B1) |
申请公布日期 |
2008.06.04 |
申请号 |
EP20020745727 |
申请日期 |
2002.07.19 |
申请人 |
NXP B.V. |
发明人 |
DOOLEY, SAUL, R.;YULE, ANDREW, T. |
分类号 |
G01S19/12;G01S1/00;G01S5/14;G01S19/14;G01S19/39 |
主分类号 |
G01S19/12 |
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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