发明名称 |
Embedded chirp signal for position determination in cellular communication systems |
摘要 |
Systems and methods are described here for locating the position of a mobile terminal in a cellular communications system. A base station in the cellular communication system broadcasts a communication signal having embedded therein a navigation signal. The navigation signal uses a chirp technique in which the chirp signal includes two portions, an up-chirp portion and a down-chirp portion. Each portion of the chirp signal is synchronized with a frame in the communication signal. The chirp navigation signal is at a power level much lower than the communication signal so as not to interfere with the communication signal. A mobile terminal generates a corresponding chirp signal to correlate with the incoming signal and to extract the navigation signal. The mobile terminal uses the detected navigation signal to determine a time of arrival of the communication signal for use in determining the position of the mobile terminal either at the terminal or to send to a network center for location processing.
|
申请公布号 |
US7068704(B1) |
申请公布日期 |
2006.06.27 |
申请号 |
US20010994015 |
申请日期 |
2001.11.27 |
申请人 |
ITT MANUFACTURING ENTERPPRISES, INC. |
发明人 |
ORR RICHARD S. |
分类号 |
G01S19/46;G01S5/02;G01S5/14;H04M11/04;H04W64/00 |
主分类号 |
G01S19/46 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|