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| Number | Title | Issue Date |
| 8180368 | Femto-cell location by direct methods 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 ... | 05/15/2012 |
| 8180319 | Remotely activatable locator system and method A method for locating an entity attached to a locator device. The method comprises of receiving, at the locator device, a message over a cellular network; and responsive to receiving the message, automatically initiating a call over the cellular network to enable a ... | 05/15/2012 |
| 8179318 | Precise position determination using VHF omni-directional radio range signals 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 d... | 05/15/2012 |
| 8150421 | User plane uplink time difference of arrival (U-TDOA) A system for locating a mobile wireless device is configured to communicate with a wireless communications system via a control plane and a user plane. The user plane includes a data channel, and the system includes a server configured to communicate via the data ch... | 04/03/2012 |
| 8149168 | Position determination using wireless local area network signals and television signals Apparatus having corresponding methods and computer-readable media comprise a first receiver to receive a wireless television signal; a first measurement unit to generate a measurement of the wireless television signal; wherein a position of the apparatus is determi... | 04/03/2012 |
| 8145238 | Location of wideband OFDM transmitters with limited receiver bandwidth One illustrative embodiment takes the form of a system for locating wireless transmitters employing an Orthogonal Frequency Division Multiplexing (OFDM) digital modulation scheme. The OFDM scheme comprises transmitting signal components over narrowband frequency cha... | 03/27/2012 |
| 8140092 | Sparsed U-TDOA wireless location networks 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 servic... | 03/20/2012 |
| 8138976 | Method for position estimation using generalized error distributions A method for improving the results of radio location systems that incorporate weighted least squares optimization generalizes the weighted least squares method by using maximum a posteriori (MAP) probability metrics to incorporate characteristics of the specific pos... | 03/20/2012 |
| 8138975 | Interference detection, characterization and location in a wireless communications or broadcast system A Wide Area Sensor Network (WASN) is disclosed that utilizes wideband software defined radios (SDRs) to monitor RF energy over a wide frequency range, detect when critical frequencies are being jammed or otherwise interfered with, and locate the source of the interf... | 03/20/2012 |
| 8125389 | Doppler-aided positioning, navigation, and timing using broadcast television signals Methods having corresponding apparatus and tangible computer-readable media comprise: determining a plurality of first pseudoranges based on a plurality of respective wireless television signals received by an apparatus and a clock signal generated by the apparatus,... | 02/28/2012 |
| 8116784 | Mid-call synchronization for U-TDOA and AoA location in UMTS 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 uplin... | 02/14/2012 |
| 8106828 | Location identification using broadcast wireless signal signatures An apparatus for location identification using broadcast wireless signal signatures includes a receiver to receive first measurements of a plurality of wireless television signals. The first measurements are made by a remote device receiving the plurality of wireles... | 01/31/2012 |
| 8102317 | Location identification using broadcast wireless signal signatures An apparatus comprises a receiver to receive a plurality of wireless television signals each representing a television channel, and a measurement circuit to identify the television channels based on the wireless television signals. One or more of a plurality of poss... | 01/24/2012 |
| 8059028 | Hybrid GNSS and TDOA wireless location system 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 satelli... | 11/15/2011 |
| 8045506 | Sparsed U-TDOA wireless location networks 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 servic... | 10/25/2011 |
| 8041505 | Navigation services based on position location using broadcast digital television signals A service depends on the location of a device. The device location is determined using DTV signals. More specifically, the device location is determined based on pseudo-ranges between the device and a plurality of digital television (DTV) transmitters and the pseudo... | 10/18/2011 |
| 8041367 | Sparsed U-TDOA wireless location networks 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 servic... | 10/18/2011 |
| 8010079 | Emergency wireless location system including a wireless transceiver A wireless location system may include geolocation of a wireless device connected to Voice-over-Internet-Protocol (VoIP) adapter. The VoIP adapter may include a wireless transceiver or a wireless location determining receiver that facilitates the location of a wirel... | 08/30/2011 |
| 7974640 | System for automatically determining cell transmitter parameters to facilitate the location of wireless devices Several techniques for locating wireless devices involve the Mobile Stations (MS) making measurements of the signals transmitted by geographically distributed base stations within a wireless network. If some key site information is known about these transmitters, su... | 07/05/2011 |
| 7974627 | Use of radio access technology diversity for location Various aspects are disclosed herein for determining a location estimate for multi-mode mobile devices using measurements from one or more radio access technologies and providing a combined location solution. Using the multiple radio access technology capability of ... | 07/05/2011 |
| 7956808 | Method for position estimation using generalized error distributions A method for improving the results of radio location systems that incorporate weighted least squares optimization generalizes the weighted least squares method by using maximum a posteriori (MAP) probability metrics to incorporate characteristics of the specific pos... | 06/07/2011 |
| 7925274 | TDOA/GPS hybrid wireless location system A method and system for enhancing the accuracy and robustness of locations determined for a mobile wireless transceiver in a cellular telephone communications system integrating location-related information both from an assisted GPS device embedded in the mobile uni... | 04/12/2011 |
| 7924224 | Variable coherence integration for the location of weak signals In a network-based Wireless Location System (WLS), geographically distributed Location Measurement Units (LMUs) must be able to detect and use reverse channel (mobile to network) signals across multiple BTS coverage areas. By using Matched Replica correlation proces... | 04/12/2011 |
| RE42285 | Applications processor including a database system, for use in a wireless location system 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... | 04/12/2011 |
| 7920875 | Subscriptionless location of wireless devices Techniques for locating wireless devices involve a wireless device making measurements of signals transmitted by geographically distributed base stations within a wireless network. If some key site information is known about these transmitters, such as the transmitt... | 04/05/2011 |
| 7848733 | Emergency wireless location system including a location determining receiver A wireless location system may include geolocation of a wireless device connected to Voice-over-Internet-Protocol (VoIP) adapter. The VoIP adapter may include a wireless transceiver or a wireless location determining receiver that facilitates the location of a wirel... | 12/07/2010 |
| 7844280 | Location of wideband OFDM transmitters with limited receiver bandwidth One illustrative embodiment takes the form of a system for locating wireless transmitters employing an Orthogonal Frequency Division Multiplexing (OFDM) digital modulation scheme. The OFDM scheme comprises transmitting signal components over narrowband frequency cha... | 11/30/2010 |
| 7804448 | Portable, iterative geolocation of RF emitters Iterative geolocation of a stationary RF emitter through the use of TDOA may include the use of a single portable geolocation (e.g., TDOA) sensor, a pair of portable geolocation sensors and three of more portable geolocation sensors. Adding portable geolocation sens... | 09/28/2010 |
| 7797000 | System for automatically determining cell transmitter parameters to facilitate the location of wireless devices Several techniques for locating wireless devices involve the Mobile Stations (MS) making measurements of the signals transmitted by geographically distributed base stations within a wireless network. If some key site information is known about these transmitters, su... | 09/14/2010 |
| 7783299 | Advanced triggers for location-based service applications in a wireless location system 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 monitoring a set of signaling links of the wireless communicati... | 08/24/2010 |
| 7689240 | Transmit-power control for wireless mobile services A method and system for enhancing the performance of augmented services associated with a wireless communications system through the dynamic exploitation of current measurements and operational configuration parameters to accurately and effectively control the signa... | 03/30/2010 |
| 7667649 | Detection of time of arrival of CDMA signals in a wireless location system In a Wireless Location System (WLS) deployed in connection with a CDMA-based wireless communications system, Location Measurement Units are used to collect multi-path corrupted radio signaling for use in time difference of arrival (TDOA) and hybrid positioning metho... | 02/23/2010 |
| 7593738 | GPS synchronization for wireless communications stations A method and system are specified to determine, provide, and exploit the precise time base relations between the distinct signal timings of the Global Positioning System (GPS) and a wireless communications system (WCS) for which the internal WCS downlink time base s... | 09/22/2009 |
| 7440762 | TDOA/GPS hybrid wireless location system A method and system for enhancing the accuracy and robustness of locations determined for a mobile wireless transceiver in a cellular telephone communications system integrates location-related information both from an assisted GPS device embedded in the mobile unit... | 10/21/2008 |
| 7427952 | Augmentation of commercial wireless location system (WLS) with moving and/or airborne sensors for enhanced location accuracy and use of real-time overhead imagery for identification of wireless device locations Mobile LMUs can be used in a Wireless Location System to provide detection coverage in areas lacking adequate receiver coverage. The mobile LMUs can be used to detect the radio frequency (RF) transmissions from wireless handsets and devices over a period of time to ... | 09/23/2008 |
| 7271765 | Applications processor including a database system, for use in a wireless location system 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... | 09/18/2007 |
| 7023383 | Multiple pass location processor 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 subsequen... | 04/04/2006 |
| 6996392 | E911 overlay solution for GSM, for use in a wireless location system In a network overlay Location Services solution for a GSM communications network, the LMU monitors the uplink and/or downlink control channels and determines which call originations are for E911 emergencies and which call setup (Stand-alone Dedicated Control Channel... | 02/07/2006 |
