发明名称 |
Determination of the transmission time of a signal part in a positioning system |
摘要 |
The invention relates to a method for determining the time of transmission of a signal part of a code modulated signal transmitted by a beacon of a positioning system and received by a receiver of the positioning system. In order to enable such a determination in weak signal conditions, it is proposed that measured subcomponents of the time of transmission of at least two signal parts are compared with corresponding predicted subcomponents in a way resulting in a combined difference for all signal parts. The comparison is performed for a plurality of assumed errors in the predicted subcomponent. The accurate time of transmission of a signal part is then determined based on the determined error value which results in the smallest combined difference. The invention relates equally to a corresponding receiver and to a corresponding positioning system.
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申请公布号 |
US6771215(B2) |
申请公布日期 |
2004.08.03 |
申请号 |
US20030402340 |
申请日期 |
2003.03.27 |
申请人 |
NOKIA CORPORATION |
发明人 |
AKOPIAN DAVID;VALIO HARRI |
分类号 |
G01S1/00;(IPC1-7):G01S5/14 |
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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