发明名称 |
Correcting a prior dead reckoning determined position measurement using GPS when GPS is later acquired |
摘要 |
Dead reckoning is used to solve a location problem when a user is out of range of GPS coverage. A starting position is determined by tracking movements from a first position where GPS coverage is not available to a second position where GPS coverage is available. The starting position is then determined by backtracking from this known position.
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申请公布号 |
US6545638(B2) |
申请公布日期 |
2003.04.08 |
申请号 |
US20010007506 |
申请日期 |
2001.10.18 |
申请人 |
NOKIA CORPORATION |
发明人 |
SLADEN PETER |
分类号 |
G01C21/00;G01C21/12;G01C21/28;G01S5/14;G01S19/49;(IPC1-7):G01S5/14 |
主分类号 |
G01C21/00 |
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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