发明名称 |
AN 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 |
WO03027703(A2) |
申请公布日期 |
2003.04.03 |
申请号 |
WO2002US28139 |
申请日期 |
2002.09.25 |
申请人 |
ITT MANUFACTURING ENTERPRISES, INC.;ORR, RICHARD, S. |
发明人 |
ORR, RICHARD, S. |
分类号 |
G01S19/46;G01S5/02;G01S5/14;H04W64/00 |
主分类号 |
G01S19/46 |
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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