发明名称 |
A SYSTEM AND METHOD FOR PROVINDING ASSISTANCE DATA WITHIN A LOCATION NETWORK |
摘要 |
A system and method for providing assistance to a position receiver in a location network consisting of a Global Navigation Satellite System (GNSS) and a synchronized network of positioning-unit devices is disclosed. A positioning-unit device observes the time and frequency of received Global Navigation Satellite System (GNSS) signals relative to the synchronized network of positioning-unit devices. These time and frequency observations are modulated, as assistance data, onto the positioning signals that are broadcast by the positioning-unit devices. A position receiver demodulates the assistance data and analyzes the positioning signals. The position receiver then searches for Global Navigation Satellite System (GNSS) signals in a range responsive to the assistance data and the analysis of the received positioning signals. |
申请公布号 |
EP1660904(B1) |
申请公布日期 |
2017.03.15 |
申请号 |
EP20040761085 |
申请日期 |
2004.08.04 |
申请人 |
Locata Corporation |
发明人 |
LAMANCE, James, JR., W;SMALL, David |
分类号 |
G01S19/05;G01S19/11;G01S1/00;G01S5/14;G01S19/23;G01S19/44;H04B7/185 |
主分类号 |
G01S19/05 |
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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