06876859 is referenced by 210 patents and cites 29 patents.

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.

Title
Method for estimating TDOA and FDOA in a wireless location system
Application Number
9/908998
Publication Number
6876859 (B2)
Application Date
July 18, 2001
Publication Date
April 5, 2005
Inventor
Louis A Stilp
Berwyn
PA, US
Alan E E Rogers
Ayer
MA, US
Robert J Anderson
Norristown
PA, US
Agent
Woodcock Washburn
Assignee
Massachusetts Institute of Technology
MA, US
TruePosition
PA, US
IPC
H04Q 007/20
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