Patents Assigned to TruePosition, Inc.
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Patent number: 8340218Abstract: Disclosed are methods and systems for filtering an intermediate frequency (IF) band when digitizing a radio frequency (RF) signal using a higher Nyquist zone several times above the sampling rate. Undersampling may be employed along with an undersampled Nyquist filtering technique to implement an integrated receiver for base station applications such as wireless base station beacon monitoring. Such a receiver may be integrated into a smaller package and consume less power at a reduced cost. In one embodiment, the receiver may operate at a high RF sampled frequency that is microsampled in the 10th Nyquist zone at less than 20% undersampling. In another embodiment, the receiver may operate in the 5th Nyquist zone at ½ the sampling rate with 40% undersampling. In various embodiments, sampling and processing functions may be implemented using software on a computer or other embedded computing device.Type: GrantFiled: December 30, 2008Date of Patent: December 25, 2012Assignee: TruePosition, Inc.Inventor: William J. Drennen, III
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Patent number: 8340630Abstract: A method for use in providing emergency services to a locator device comprises remotely triggering the locator device. This causes the locator device to employ a first wireless transceiver to communicate with a control center and to employ a second wireless transceiver to initiate an emergency services call to a public services answering point (PSAP). Information relating to the locator device is provided from the control center to the PASP using a backchannel communications channel.Type: GrantFiled: June 2, 2011Date of Patent: December 25, 2012Assignee: TruePosition, Inc.Inventor: Matthew L. Ward
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Patent number: 8331955Abstract: A wireless location system is configured to operate in a CDMA-based wireless communication network. In exemplary embodiments, location measuring units (LMUs) can synchronize to sectors of base stations and store sector timing information. In response to a request to geo-locate a mobile device communicating with a sector, sector timing information for the servicing sector is sent to other LMUs and the LMUs can use the sector timing information to detect uplink signals transmitted by the mobile device. The location of the mobile device can then be estimated based on time of arrival measurements made by the LMUs.Type: GrantFiled: December 28, 2010Date of Patent: December 11, 2012Assignee: TruePosition, Inc.Inventors: Jeffrey F. Bull, Robert J. Anderson
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Patent number: 8320931Abstract: Method and systems are employed by a wireless location system (WLS) for locating a wireless device operating in a geographic area served by a wireless communications system. An exemplary method includes defining a geo-fenced area. The method then includes monitoring a set of predefined signaling links of the wireless communications system, and detecting that a mobile device has performed any of the following acts with respect to the geo-fenced area: (1) entered the geo-fenced area, (2) exited the geo-fenced area, and (3) come within a predefined degree of proximity near the geo-fenced area. A high-accuracy location function may then be triggered in order to determine the geographic location of the mobile device.Type: GrantFiled: August 8, 2005Date of Patent: November 27, 2012Assignee: TruePosition, Inc.Inventors: Matthew L. Ward, Paul M Czarnecki, Robert J. Anderson
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Patent number: 8315647Abstract: Disclosed is a method for processing readily available radio network, timing and power information about cellular networks and typical measurements made by the mobile device and network. A probabilistic method is disclosed that uses both time (i.e., range) and power differences with known downlink transmitter antenna characteristics to locate mobiles with accuracy better than cell-ID with ranging, with high capacity, and without the need for field calibration.Type: GrantFiled: December 28, 2010Date of Patent: November 20, 2012Assignee: TruePosition, Inc.Inventors: Pitchaiah Soma, Jeffrey F. Bull, Rashidus S. Mia, Pete A. Boyer
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Patent number: 8290496Abstract: For Wireless Communications Networks (WCNs) that support soft handover, cooperator receiver selection for a TDOA, AOA, TDOA/AOA, or hybrid network-based or network-overlay Wireless Location System (WLS) must contend with one or more network base stations as a serving cell. When the active set contains more than one member, two techniques for determining a set of cooperating and demodulating receivers to use in the signal collection for location estimation is disclosed. In one embodiment, the active set members are constructively reduced to a single member that is used as a proxy serving cell. In another embodiment, the information contained in the active set membership is retained and a new set of demodulating and cooperator receivers are generated based on the entire membership of the active set.Type: GrantFiled: December 29, 2009Date of Patent: October 16, 2012Assignee: TruePosition, Inc.Inventors: Edward Joseph Segall, Simon Issakov, Rashidus S. Mia
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Patent number: 8242959Abstract: 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 downlink beacon discovery limited.Type: GrantFiled: April 18, 2007Date of Patent: August 14, 2012Assignee: TruePosition, Inc.Inventors: Rashidus S. Mia, Robert J. Anderson
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Patent number: 8233091Abstract: Methods having corresponding apparatus and computer-readable media comprise: receiving television signals and a message at an apparatus, wherein the television signals include an NTSC television signal and an ATSC television signal, wherein the message represents first and second arrival times representing absolute times of arrival at the apparatus of a first wavefront of the NTSC and ATSC television signals, respectively; measuring third and fourth arrival times, based on a local clock, after receiving the message, wherein the third and fourth arrival times represent times of arrival at the apparatus of a second wavefront of the NTSC and ATSC television signals, respectively; and providing a clock correction signal for the local clock based on the first arrival time, the second arrival time, the third arrival time, and the fourth arrival time.Type: GrantFiled: May 8, 2008Date of Patent: July 31, 2012Assignee: TruePosition, Inc.Inventors: Matthew Rabinowitz, James J. Spilker, Jr., Scott Furman, Dimitri Rubin, Harvind Samra, David Burgess, Guttorm Opshaug, Jim Omura
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Patent number: 8224348Abstract: Collection and analysis of network transaction information which includes the mobile device's usage, location, movements coupled with data from non-wireless network sources allow for the automation of analysis for the detection of anti-social behaviors.Type: GrantFiled: December 18, 2009Date of Patent: July 17, 2012Assignee: TruePosition, Inc.Inventors: Brian R. Bolon, Jeffrey F. Bull, Matthew L. Ward
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Patent number: 8213957Abstract: A Network Autonomous Wireless Location System (NAWLS) is designed to allow for precise location of a mobile device (e.g., a cell phone) without interconnection to, and with minimal disruption of, the local wireless communications network. Using distributed radio network monitors (RNM) and a managed network emulator (NE); mobile devices are sampled, acquired or captured. Once triggered by the RNM or NE, an untethered wireless location system (U-WLS) is used to calculate a precise location. The U-WLS; comprising mobile receiver sites, each capable of self location, exchanging information with other components of the NAWLS, and receiving or exchanging signals from the mobile device; utilizes various network-based and handset-based wireless location techniques dependent on the deployed options. In addition, the NAWLS includes data links interconnecting the U-WLS, NE and RNM.Type: GrantFiled: April 22, 2009Date of Patent: July 3, 2012Assignee: TruePosition, Inc.Inventors: Jeffrey F. Bull, Matthew L. Ward
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Publication number: 20120165038Abstract: Disclosed is a method for processing readily available radio network, timing and power information about cellular networks and typical measurements made by the mobile device and network. A probabilistic method is disclosed that uses both time (i.e., range) and power differences with known downlink transmitter antenna characteristics to locate mobiles with accuracy better than cell-ID with ranging, with high capacity, and without the need for field calibration.Type: ApplicationFiled: December 28, 2010Publication date: June 28, 2012Applicant: TruePosition, INC.Inventors: Pitchaiah Soma, Jeffrey F. Bull, Rashidus S. Mia, Pete A. Boyer
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Patent number: 8208892Abstract: A method for locating an entity attached to a locator device comprises receiving, at the locator device, a message over a cellular network. Responsive to receiving the message, a call over the cellular network is automatically initiated to enable a party answering the call to determine a location of the locator device.Type: GrantFiled: January 12, 2010Date of Patent: June 26, 2012Assignee: TruePosition, Inc.Inventors: James Elwood Nalley, Christopher Daniel Buehler
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Patent number: 8204510Abstract: A serving mobile location center (SMLC) receives a position request concerning a mobile-of-interest (MOI) operating in a discontinuous transmission (DTX) mode, and in response a wireless location system (WLS) is tasked to locate the MOI. A plurality of location measurement units (LMUs) are instructed to receive and digitize radio frequency (RF) energy. At the LMUs, a signal of interest is received and cross-correlated with a known training sequence to produce a received detection metric. The detection metric is weighted to favor the MOI even in the presence of interference from other mobile devices. The SMLC selects the LMU with the best weighted detection metric as a reference site and selects two or more LMUs with lesser weighted detection metrics above a threshold as co-operating sites. The received signal of interest is demodulated and demodulated data are distributed to the co-operating sites.Type: GrantFiled: October 8, 2010Date of Patent: June 19, 2012Assignee: TruePosition, Inc.Inventor: Donald C Mills
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Patent number: 8204511Abstract: In a wireless location system, a method for determining frame and slot timing information for use in receiving an uplink signal from a user equipment (UE) device assigned to an uplink Dedicated Physical Control Channel (DPCCH) includes receiving signals in the uplink DPCCH at a location measurement unit (LMU) of the WLS. The method also includes detecting a predefined bit pattern known to be present in a plurality of predefined slots of the uplink DPCCH. Next, the frame and slot timing information are determined for the uplink DPCCH based on the detected bit pattern. Finally, the frame and slot timing information is used for collecting uplink signals from the UE for use in location processing.Type: GrantFiled: June 29, 2011Date of Patent: June 19, 2012Assignee: TruePosition, Inc.Inventor: Rashidus S. Mia
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Patent number: 8196267Abstract: A locking clasp provides security against opening without assistance to ensure that items employing the clasp remain locked and affixed in place. In addition, the locking clasp is easy to lock, aesthetically unobtrusive, and comfortable to wear.Type: GrantFiled: November 11, 2009Date of Patent: June 12, 2012Assignee: TruePosition, Inc.Inventors: James Elwood Nalley, Christopher Daniel Buehler, Bruce Woodall, James Fairey
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Patent number: 8200239Abstract: Location of small, consumer deployed femto-cells cannot be determined by the usual site survey methods. Location of attached mobiles allows for a proxy location of the femto-cell that can then be used for wireless network planning including the provisioning of a calculated default emergency services location for the femto-cell.Type: GrantFiled: November 11, 2008Date of Patent: June 12, 2012Assignee: TruePosition, Inc.Inventors: Rashidus S. Mia, Robert J. Anderson, Matthew L. Ward
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Patent number: 8199051Abstract: To reduce power consumption in a user terminal, especially mobile devices, a system and method are introduced that use terrestrial beacons as a location proxy when satellite positioning signals are not available. The geographic locations of the terrestrial beacons need not be known to use the beacons as a proxy for a satellite positioning signals derived location.Type: GrantFiled: December 18, 2009Date of Patent: June 12, 2012Assignee: TruePosition, Inc.Inventors: Robert J Anderson, Matthew L. Ward
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Patent number: 8199050Abstract: A method and apparatus for position determination is provided using measurements from both Global Positioning System (GPS) receivers and terrestrial-based Uplink Time Difference of Arrival (UTDOA) receivers. The method involves the transformation of downlink satellite measurements into equivalent UTDOA measurements by computing comparable cross-correlation coefficients and time differences of arrival with respect to a UTDOA reference station. The method includes a weighting operation whereby the relative weights of the UTDOA measurements and the relative weights of the GPS measurements are adjusted based on a theoretical scaling followed by empirical adjustments. The method further involves the efficient computation and combining of metrics that are used to minimize the weighted error between candidate location solutions and the UTDOA and GPS measurements.Type: GrantFiled: September 22, 2011Date of Patent: June 12, 2012Assignee: TruePosition, Inc.Inventors: Pete A. Boyer, Ronald Lefever, Rashidus S. Mia, Robert J. Anderson
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Patent number: 8179318Abstract: Apparatus having corresponding methods and computer programs comprise a wireless receiver to receive a Very High Frequency (VHF) Omni-directional Radio Range (VOR) signal comprising a frequency-modulated (FM) component; an analog-to-digital converter to generate a digital signal based on the VOR signal, the digital signal comprising data representing the FM component; and a FM phase circuit comprising a correlator to generate a correlation peak based on the data representing the FM component and an ideal representation of the FM component, and a peak detector to determine a phase of the FM component based on the correlation peak.Type: GrantFiled: September 10, 2009Date of Patent: May 15, 2012Assignee: TruePosition, Inc.Inventors: Scott Furman, Guttorm Opshaug
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Patent number: 8180368Abstract: Illustrative embodiments of the inventive subject matter described herein include, but are not limited to, the following: a femto-cell device, methods for use by a wireless location system (WLS) in locating a femto-cell device, and a wireless location system having certain features relating to the location of femto-cell devices. A femto-cell device used in a wireless communications system (WCS) includes a location subsystem configured to acquire information identifying the geographic location of the femto-cell device. The device also includes an antenna subsystem, a radio frequency (RF) block coupled to the antenna subsystem, a baseband block coupled to the RF block, and a communications block coupled to the baseband block. In addition, the device is configured to communicate with the WCS, including communicating at least some of the location information to the WCS.Type: GrantFiled: November 11, 2008Date of Patent: May 15, 2012Assignee: TruePosition, Inc.Inventors: Robert J. Anderson, Rashidus S. Mia, Matthew L. Ward