1
Louis A Stilp, Curtis A Knight, John C Webber: System for locating a source of bursty transmissions cross reference to related applications. Associated RT March 4, 1997: US05608410 (162 worldwide citation)


A system for determining the location of a mobile transmitter is disclosed. The mobile transmitter receives a message signal and responds to the message signal by transmitting a responsive signal, wherein the responsive signal is indicative of the identity of the mobile transmitter. One preferred em ...


2
Louis A Stilp: Calibration for wireless location system. TruePosition February 6, 2001: US06184829 (161 worldwide citation)


Methods and apparatus for calibrating a Wireless Location System to enable the system to make highly accurate TDOA and FDOA measurements are disclosed. An external calibration method in accordance with the present invention comprises the steps of transmitting a first reference signal from a referenc ...


3
Robert J Anderson, Alan E E Rogers, Louis A Stilp: Method for estimating TDOA and FDOA in a wireless location system. TruePosition, Massachusetts Institute of Technology April 5, 2005: US06876859 (154 worldwide citation)


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 si ...


4
Louis A Stilp, Joseph W Sheehan, Alan E E Rogers, Robert J Anderson, Vineet Sachdev: Mobile-assisted network based techniques for improving accuracy of wireless location system. TruePosition, Massachusetts Institute of Technology October 8, 2002: US06463290 (122 worldwide citation)


The accuracy of the location estimate of a Wireless Location System is dependent, in part, upon both the transmitted power of the wireless transmitter and the length in time of the transmission from the wireless transmitter. In general, higher power transmissions and transmissions of greater transmi ...


5
Louis A Stilp: Method and system for synchronizing receiver systems of a wireless location system. TruePosition February 26, 2002: US06351235 (114 worldwide citation)


In a wireless location system (WLS) including a plurality of geographically separated receiver systems, a system for synchronizing the respective receiver systems includes the use of an enhanced GPS receiver including a mechanism for receiving GPS signals and removing at least a portion of the timin ...


6
Michael John Kovach Jr, Anthony Richard Brigidi, John Solley, Edwin E McCook, Robert J Anderson, Vineet Sachdev, Thomas Ginter, Joseph W Sheehan, Louis A Stilp: Centralized database system for a wireless location system. TruePosition November 13, 2001: US06317604 (109 worldwide citation)


A centralized database system is used in a wireless location system that determines the geographical locations of mobile wireless transmitters, the wireless location system including signal collection systems, location processors for processing digitized RF data provided by the signal collection sys ...


7
Louis A Stilp, Robert J Anderson, Matthew L Ward: Applications processor including a database system, for use in a wireless location system. TruePosition September 18, 2007: US07271765 (102 worldwide citation)


An Applications Processor (14) including a centralized database system is used in a wireless location system (WLS). The APs 14 may be used to manage resources in the WLS, including signal collection systems (SCSs 10) and TDOA location processors (TLPs 12). Each AP 14 contains a database containing t ...


8
Louis A Stilp, Robert J Anderson, Joseph W Sheehan: Modified transmission method for improving accuracy for e-911 calls. TruePosition December 25, 2001: US06334059 (101 worldwide citation)


The accuracy of the location estimate of a Wireless Location System is dependent, in part, upon both the transmitted power of the wireless transmitter and the length in time of the transmission from the wireless transmitter. In general, higher power transmissions and transmissions of greater transmi ...


9
Louis A Stilp, Charles C Counselman III: Bandwidth synthesis for wireless location system. TruePosition July 18, 2000: US06091362 (99 worldwide citation)


A wireless location system receives signals transmitted by wireless telephones at a plurality of signal collection sites. To improve the accuracy of the location information, the system synthesizes greater bandwidth, and thus greater time resolution, than would otherwise be available. The location s ...


10
Louis A Stilp: Method for improving the accuracy of a wireless location system. TruePosition August 1, 2000: US06097336 (96 worldwide citation)


A method for locating a mobile transmitter comprises the steps of (a) making a first estimate of the location of the mobile transmitter on the basis of a first transmission from the mobile transmitter; (b) causing the mobile transmitter to emit a second transmission; (c) making a second estimate of ...



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