发明名称 |
Method for estimating TDOA and FDOA in a wireless location system |
摘要 |
A method, used in locating a mobile transmitter, includes providing a set of cross-correlation values, wherein each cross-correlation value is associated with a corresponding TDOA and/or FDOA estimate and is produced by cross-correlating a reference signal with a cooperating signal. The reference signal comprises a copy of a signal transmitted by the mobile transmitter as received at a first antenna and the cooperating signal comprises a copy of the same signal as received at a second antenna. The method further includes determining a most likely range of TDOA and/or FDOA estimates, and then identifying an optimal cross-correlation value within a subset of cross-correlation values corresponding to the most likely range of TDOA and/or FDOA estimates. The TDOA and/or FDOA value corresponding to the optimal cross-correlation value is then employed in calculating the location of the mobile transmitter.
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申请公布号 |
US6876859(B2) |
申请公布日期 |
2005.04.05 |
申请号 |
US20010908998 |
申请日期 |
2001.07.18 |
申请人 |
TRUEPOSITION, INC.;MASSACHUSETTS INSTITUTE OF TECHNOLOGY |
发明人 |
ANDERSON ROBERT J.;ROGERS ALAN E. E.;STILP LOUIS A. |
分类号 |
G01S5/06;G01S1/02;G01S5/10;G01S19/09;G01S19/46;H04W64/00;(IPC1-7):H04Q7/20 |
主分类号 |
G01S5/06 |
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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