发明名称 |
Method and device for chronologically synchronizing a location network |
摘要 |
Chronologically synchronizing a unique positing signal generated by a positioning-unit device at a known location with a reference positioning signal generated by a reference transmitter at a known geometric distance. The positioning-unit device receives and interprets a reference positioning signal. It then generates and transmits a unique positioning signal, wherein the unique positioning signal is aligned with a frequency steerable clock. The positioning-unit device then receives the unique positioning signal. The positioning-unit device then adjusts the frequency of the frequency steerable clock by an amount derived from a measured frequency difference. The positioning-unit device then determines a reference positioning signal propagation delay between the reference transmitter and the positioning-unit device. At this stage, a time difference is measured between the received reference positioning signal and the received unique positioning signal. Finally, the frequency steerable clock is offset for a period of time derived from the measured time difference and the determined propagation delay and the unique positioning signal is consequently adjusted. |
申请公布号 |
US7616682(B2) |
申请公布日期 |
2009.11.10 |
申请号 |
US20040494024 |
申请日期 |
2004.04.29 |
申请人 |
LOCATA CORPORATION PTY LTD. |
发明人 |
SMALL DAVID |
分类号 |
G01S19/11;H04B1/38;G01S1/00;G01S1/24;G01S5/00;G01S5/02;G01S5/14;G01S11/08;G01S19/05;G01S19/10;G01S19/23;G01S19/25;G01S19/43;H04Q7/34 |
主分类号 |
G01S19/11 |
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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