1
Louis A Stilp, Robert J Anderson, Matthew L Ward: Applications processor including a database system, for use in a wireless location system. TruePosition, Woodcock Washburn, September 18, 2007: US07271765 (284 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 ...


2
Robert J Anderson: Monitoring of call information in a wireless location system. TruePosition, Woodcock Washburn, August 24, 2004: US06782264 (211 worldwide citation)

In an overlay Wireless Location System, an Abis interface is monitored to obtain information used to locate GSM phones. Signaling links of the Abis interface are passively monitored to obtain certain information, such as control and traffic channel assignment, called number, and mobile identificatio ...


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, Woodcock Washburn, April 5, 2005: US06876859 (210 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, Woodcock Washburn, October 8, 2002: US06463290 (180 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, Robert J Anderson, Matthew L Ward: Multiple pass location processor. Trueposition, Woodcock Washburn, April 4, 2006: US07023383 (165 worldwide citation)

A multiple pass location processing method, for use in a wireless location system (WLS), comprises identifying a received transmission as requiring multiple pass location processing whereby the WLS produces a first, lower quality location estimate and then subsequently produces a second, higher qual ...


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, Woodcock Washburn Kurtz Mackiewicz & Norris, November 13, 2001: US06317604 (153 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
Robert J Anderson: Monitoring of call information in a wireless location system. TruePosition, Woodcock Washburn, January 23, 2007: US07167713 (145 worldwide citation)

In an overlay Wireless Location System, an Abis interface is monitored to obtain information used to locate GSM phones. Signaling links of the Abis interface are passively monitored to obtain certain information, such as control and traffic channel assignment, called number, and mobile identificatio ...


8
Rashidus S Mia, Robert J Anderson: Sparsed U-TDOA wireless location networks. TruePosition, Woodcock Washburn, August 14, 2012: US08242959 (141 worldwide citation)

In an overlay, U-TDOA-based, Wireless Location System, LMUs typically co-located with BTSs, are used to collect radio signaling both in the forward and reverse channels. Techniques are used to compensate for sparse LMU deployments where sections of the U-TDOA service area are uplink demodulation or ...


9
Louis A Stilp, Joseph W Sheehan, Alan E E Rogers, Robert J Anderson, Andrew F Harbison: Antenna selection method for a wireless location system. TruePosition, Massachusetts Insitute of Technology, Woodcock Washburn, June 4, 2002: US06400320 (130 worldwide citation)

An antenna selection method is used in a wireless location system that determines the geographic location of a mobile wireless transmitter. The wireless location system includes signal collection systems connected to multiple antennas at a plurality of cell sites and a location processor for process ...


10
Louis A Stilp, Robert J Anderson, Joseph W Sheehan: Modified transmission method for improving accuracy for e-911 calls. TruePosition, Woodcock Washburn, December 25, 2001: US06334059 (129 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 ...