By Computer Patents (Class 342/451)
  • Patent number: 8294568
    Abstract: An intrinsically safe accurate location information network for personnel and assets in underground mines, including wireless access points and subnetwork controllers, active wireless locator/messenger tags, network controller(s), and enterprise servers running application control software. The wireless access points are installed in mine entries and crosscuts and track the active wireless locator/messenger tags. The active tags may be worn by mine personnel or installed in mining equipment. The network subsystems form relay networks that wirelessly carry telemetry and control data without the need to penetrate the earth. The subsystems determine the location of persons and assets underground and monitor safety-related information, which can be used for disaster avoidance, early warning of impending disaster, and improved rescue effectiveness.
    Type: Grant
    Filed: July 10, 2007
    Date of Patent: October 23, 2012
    Assignee: Venture Corporation Limited
    Inventor: James P. Barrett
  • Patent number: 8294616
    Abstract: The location of a land-based radio frequency (RF) emitter is determined from an airborne platform. RF signaling is received from the RF emitter via first and second antennas. In response to the received RF signaling, signal samples for both antennas are produced and processed to determine the location of the RF emitter.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: October 23, 2012
    Assignee: Sandia Corporation
    Inventors: Richard C. Ormesher, Douglas L. Bickel
  • Publication number: 20120262335
    Abstract: Disclosed is an apparatus and method for pairing measurements and position estimate as an information pair from multiple mobile devices and reporting these information pairs to a server without over burdening the mobile device and without requiring the mobile devices to establish a new link. Also, disclosed is an apparatus and method for collecting these information pairs and compiling network maps based on the information pairs.
    Type: Application
    Filed: December 16, 2011
    Publication date: October 18, 2012
    Applicant: QUALCOMM Incorporated
    Inventors: Alejandro R. Holcman, Manish Tripathi, Mukesh K. Mittal
  • Patent number: 8289210
    Abstract: A disclosed method uses the results of location queries to tune the value of measurements of a property to obtain a statistically representative measurement for geo location. As location requests arrive, a current measurement value associated with the serving area or location is used to determine the number of measurements to obtained; the resulting uncertainty is mapped against the number of measurements required to determine that value. If additional measurements are required to achieve the target uncertainty in the result, this is recorded. The process relies on empirical observations and has the additional advantage of being blind to the actual network topology. This approach by its own nature automatically takes into account network changes whether known or unknown.
    Type: Grant
    Filed: October 15, 2009
    Date of Patent: October 16, 2012
    Assignee: Andrew LLC
    Inventors: Martin Thomson, James Winterbottom
  • Publication number: 20120249372
    Abstract: One or more bits are used in peer discovery signals to signal a device's ability and/or willingness to participate in a cooperative manner with regard to one or more mobile device location determination related operations. In some embodiments, the one or more bits are located at predetermined locations within a header portion of a peer discovery signal. Different bits, in some embodiments, are associated with different specific cooperative location determination related operations. The peer discovery signal is transmitted, e.g., broadcast, periodically or on some predetermined basis by a mobile wireless communications device. In this manner, a device listening to the peer discovery signals can determine other devices' willingness to perform particular location discovery related operations with very little signaling overhead.
    Type: Application
    Filed: March 28, 2011
    Publication date: October 4, 2012
    Applicant: QUALCOMM Incorporated
    Inventors: Aleksandar Jovicic, Junyi Li, Cyril Measson, Thomas Richardson
  • Publication number: 20120249373
    Abstract: Methods and systems for populating and maintaining a non-positional transmitter location database are disclosed. When a mobile station detects a non-positional transmitter, the mobile station transmits information regarding the non-positional transmitter as well as information regarding recognized positional transmitters to a non-positional transmitter location (NPT_L) database server. The NPT_L database server aggregates the information received from multiple mobile stations for particular non-positional transmitter to calculate the location of the non-positional transmitter. Thus, the need to use external resources (such as drive runs) to locate non-positional transmitters is reduced.
    Type: Application
    Filed: January 13, 2012
    Publication date: October 4, 2012
    Applicant: QUALCOMM INCORPORATED
    Inventor: Ashok Bhatia
  • Publication number: 20120235865
    Abstract: The present invention is for a system and method for determining the proximity of a mobile device to a location without the use of a satellite based or other location awareness system, nor a stationary beacon of any kind Instead, the mobile device monitors radio frequency broadcast identification codes from nearby mobile devices, and determines if the set of detected identification codes is sufficiently similar to a weighted set of identification codes attributed to specified location. If the calculation of similarity meets the confidence conditions of the system, notification is made that the customer or visitor has arrived. The invention utilizes a combination of confidence interval computation, machine learning, and fault tolerance mechanisms to optimize the success of correctly detecting that the device is near the relevant location.
    Type: Application
    Filed: March 19, 2012
    Publication date: September 20, 2012
    Applicant: KAARYA LLC
    Inventors: Ujjual Nath, Gaurav Sharma, William Fletcher, Douglas MacGlashan, Brian Billett
  • Publication number: 20120235864
    Abstract: According to an embodiment of the present invention, a three-dimensional (3-D) energy-based emitter geolocation technique determines the geolocation of a radio frequency (RF) emitter based on energy or received signal strength (RSS) of transmitted signals. The technique may be employed with small unmanned air vehicles (UAV), and obtains reliable geolocation estimates of radio frequency (RF) emitters of interest.
    Type: Application
    Filed: March 16, 2011
    Publication date: September 20, 2012
    Applicant: ITT MANUFACTURING ENTERPRISES, INC.
    Inventor: Ning Hsing Lu
  • Publication number: 20120229340
    Abstract: A method for determining geolocation of a mobile device, and a system for performing the method. The mobile device includes a location component, a local positioning component, and a reference positioning component. The method includes determining a local-positioning period based on an identified factor, and obtaining a location fix for the device from the reference positioning component. The method further includes commencing the period and measuring movement using the location component. The method also includes determining a present location of the device, using the location component, based on the location fix and the movement data and, during the period, repeating the measuring and determining steps. The method further includes, after the period expires, updating the location fix with a new location fix from the reference positioning component, resetting the local-positioning period; and repeating the steps for determining location during the reset period using the new location fix.
    Type: Application
    Filed: May 23, 2012
    Publication date: September 13, 2012
    Inventors: Paul Henry, Christopher Rice
  • Publication number: 20120229341
    Abstract: A CE device can incorporate a GPS receiver and can be moved around a building with wireless access point (AP) signal strengths recorded at various locations. The optimum AP location is selected on the basis of the location-to-signal strength correlations.
    Type: Application
    Filed: May 23, 2012
    Publication date: September 13, 2012
    Inventors: Paul Jin Hwang, Fredrik Carpio, Nikolaos Georgis, Benjamin Lo
  • Publication number: 20120218150
    Abstract: To provide a management server, population information calculation management server, non-populated area management method, and population information calculation method capable of easily specifying a depopulated area and calculating accurate population information, a GPS information collection unit (519) collects location information of mobile equipments (100) and stores them into a GPS information accumulation unit (514). Then, a depopulated area specifying unit (516) specifies a non-populated area in a given area (for example, an area (sector influence diagram) designated by an operator) using the location information accumulated in the GPS information accumulation unit (514). The population distribution can be thereby accurately calculated using the non-populated area. For example, there can be a case where the population distribution in a given area is not uniform within the area.
    Type: Application
    Filed: October 21, 2010
    Publication date: August 30, 2012
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuki Oyabu, Ichiro Okajima, Tomohiro Nagata
  • Publication number: 20120212374
    Abstract: An apparatus having a first antenna; a second antenna; and a controller coupled to the first and second antennas, wherein the controller is configured to determine a first ranging measurement between the first antenna and a device antenna on a device; determine a second ranging measurement between the second antenna and the device antenna; and determine an orientation and position of the apparatus relative to the device by combining the first and second ranging measurements. A method for implementing the orientation and position process is also disclosed herein.
    Type: Application
    Filed: August 10, 2011
    Publication date: August 23, 2012
    Applicant: QUALCOMM Incorporated
    Inventors: Miles Alexander Lyell Kirby, David Jonathan Julian, Rinat Burdo
  • Patent number: 8237612
    Abstract: Estimating positions of beacons based on spatial relationships among neighboring beacons. Beacon reference data defining positions of beacons is stored from beacon fingerprints observed by devices (e.g., enabled with global positioning system receivers). For a received beacon fingerprint having at least one beacon for which the beacon reference data is missing (e.g., from a device without a GPS receiver), beacons in the received beacon fingerprint for which beacon reference data is available are identified. Based on these identified beacons, the missing beacon reference data is calculated. In some embodiments, a set of spatially diverse beacons is selected from the identified beacons prior to calculating the beacon reference data.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: August 7, 2012
    Assignee: Microsoft Corporation
    Inventors: Jyh-Han Lin, John Charles Krumm, Arjun Sundararajan
  • Patent number: 8232913
    Abstract: A multilateration system and method includes a plurality of receiver stations for receiving signals from an aircraft, and a controller that derives the position of the aircraft by applying a multilateration process to outputs from the receiver stations. For this purpose, the controller determines the altitude of the aircraft and selects a multilateration process that is to be used for position determination, based on the determined altitude.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: July 31, 2012
    Assignee: Roke Manor Research Limited
    Inventor: Robert John Weedon
  • Patent number: 8233890
    Abstract: Included are embodiments of a method for communicating user preferences to at least one environment. At least one embodiment includes receiving a request from an environment for preference information related to a user and receiving a user identifier from the environment, the user identifier obtained via a portable user device. Other embodiments include determining at least one user preference related to the user, determining capabilities related to the environment, and communicating at least one user preference to the environment.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: July 31, 2012
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Samuel N. Zellner, Douglas O'Neil
  • Publication number: 20120188129
    Abstract: An ultra wideband (UWB) or short-pulse RF system is disclosed that can be used to precisely locate or track objects (such as personnel, equipment, assets, etc.) in real-time in an arbitrarily large, physically connected or disconnected, multipath and/or noisy environment. A system implementation includes multiple zones or groups of receivers that receives RF signals transmitted by one or more timing reference tags and one or more objects having associated object tags. Each zone or group may share a common receiver. By combining a multiple reference tag system with a virtual group of receivers, i.e., a zoning technique or system, a cost-effective system can be provided that offers scalability and flexibility to monitor a significantly expanded coverage area.
    Type: Application
    Filed: March 30, 2012
    Publication date: July 26, 2012
    Applicant: MULTISPECTRAL SOLUTIONS, INC.
    Inventors: Aitan Ameti, Keming Chen, Robert J. Fontana, Edward A. Richley, Belinda Turner
  • Patent number: 8228234
    Abstract: A mobile computing device includes a housing, a processor provided within the housing, and a location-determining system configured to determine a current location of the mobile computing device at a first rate. The location determining system may be configured to adjust the first rate to a different second rate based on a threshold distance value and a distance from the current location to an anticipated future location of the mobile computing device.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: July 24, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Janell Paulson, Thomas Fong
  • Patent number: 8229031
    Abstract: Embodiments related to global positioning are described and depicted.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: July 24, 2012
    Assignee: Infineon Technologies AG
    Inventor: Andreas Schmid
  • Publication number: 20120154211
    Abstract: An electronic device having a system for tracking and monitoring to recover and/or service topography equipment. The electronic device is hidden within the topography equipment by a certified technician and is registered in an operating center. When desired by the operating center, a SIM card connects through a cell phone carrier to enable monitoring and geographic localization of the topography equipment by the operating center, whereby a GPS antenna receives the signal from a satellite via a modem. Therefore, the owner, authorized personnel and/or police officer(s) can then track the signal and locate the topography equipment for recovery and/or service maintenance.
    Type: Application
    Filed: June 29, 2011
    Publication date: June 21, 2012
    Inventor: Saturnino BERAJAS ENDEZ
  • Publication number: 20120157795
    Abstract: An improved emergency response system is provided. The system includes a patient or subscriber location database having a schedule of patient or subscriber activities. In one implementation, an emergency services server detects when the patient or subscriber is having a possible medical event as indicated by medical physiologic data transmitted from a wireless communication device proximate the patient. A third party such as a technologist and/or doctor diagnoses the patient and determines whether treatment is required. If treatment is required, a phone located remotely from the patient is used to call an emergency services first responder from a public safety access point in the patient's location. The remotely located phone has an automatic location identification database record that is updated based on the patient's current location as indicate by the patient location database.
    Type: Application
    Filed: April 8, 2011
    Publication date: June 21, 2012
    Applicant: ROSS MEDICAL CORPORATION
    Inventors: Alexander Ross Chiu, Neil Adam Frederick, Eric Alan Frederick, Jimmy Young Jae Chung
  • Patent number: 8204677
    Abstract: A method for tracking a moving platform (MP) wherein the MP uses an on-board navigation system (NS). Data provided by the navigation system on board the moving platform (MP) is merged with data obtained using a tracking system that tracks the MP from another location. A typical navigation system on board the moving platforms is an inertial navigation system (INS). State data of one or more MP is sent to a processing facility and state data of one or more electromagnetic tracking (EMT) is collected by one or more processing facility. The collected states data from the sources are processed, using the one or more processing facilities for calculating tracking data are used to direct one or more antennas for MP tracking. The state data from one or more MP's are sent using a communications channel.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: June 19, 2012
    Assignee: Rafael—Armament Development
    Inventors: Daniel Rosenfeld, Ofer Salama
  • Publication number: 20120139782
    Abstract: System, methods, and devices for a self-sustaining differential corrections network that employs roving reference devices (RRDs) as reference stations for improving positioning, navigation, and timing (PN&T) solutions for other enabled local roving and/or stationary receiving devices (RDs) are disclosed herein. The disclosed differential correction system enhancement leverages RRDs enabled for a non-global positioning system (non-GPS), secondary PN&T signal to characterize local errors. These local errors are then used by local RDs in combination with a signal to calculate an improved PN&T estimate for the RDs.
    Type: Application
    Filed: May 23, 2011
    Publication date: June 7, 2012
    Applicant: THE BOEING COMPANY
    Inventors: Gregory M. Gutt, Arun Ayyagari, David A. Whelan, Michael Lee O'Connor, David G. Lawrence
  • Publication number: 20120139791
    Abstract: Apparatus for determining an estimated value for a location of a receiving element within a reference system which may receive signals of a signal source movable to different measuring positions, it being possible to measure—on the basis of the signals received—localization data which indicate a relative location of the receiving element with respect to the movable signal source, the apparatus being configured to determine the estimated value on the basis of at least two different measuring positions and localization data corresponding thereto by means of an evolutionary algorithm. On the basis of the localization data measured, a fitness function of the evolutionary algorithm is formed, the localization data having an angle of arrival of the received signals on the receiving element, and/or a signal arrival time from which a distance from the signal source may be determined.
    Type: Application
    Filed: November 4, 2011
    Publication date: June 7, 2012
    Inventors: Thorsten Edelhaeusser, Joerg Nilson, Hans Holm Fruehauf
  • Publication number: 20120133555
    Abstract: A method and system for building a database (DB) of location information of APs and providing AP location information in a shadow area of Global Positioning System (GPS) using the DB includes acquiring a reference location during a location information acquisition mode; collecting AP information of at least one AP by a mobile terminal by scanning periodically; calculating AP scan location where AP scan is executed; calculating AP location of the at least one AP using the AP information and the AP scan location; and building the AP location information DB by listing a mapping of the AP location to AP information.
    Type: Application
    Filed: November 30, 2011
    Publication date: May 31, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Moon Pil HYUN
  • Patent number: 8188921
    Abstract: A method to support client device position discovery within a building includes ascribing building position coordinates to beacons within the building. The building position coordinates are converted to physical position coordinates. The physical position coordinates are augmented with at least one additional parameter that supports position resolution. A client device communicates with accessed beacons positioned within the building. A beacon location database characterizing the physical locations of the accessed beacons is also accessed. The physical location of the client device is computed based upon the physical locations of the accessed beacons.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: May 29, 2012
    Assignee: Teecom Design Group
    Inventors: David Allen Marks, Alexander James Serriere
  • Patent number: 8179317
    Abstract: Using in-phase and quadrature components of a received signal, spatial and temporal information is utilized to generate a maximum likelihood coefficient from the measured data to geolocate an emitter of unknown frequency. In one embodiment an iso-Doppler contour is generated having regions of high correlation to estimate location in which the maximum likelihood calculation uses two factors, one derived from a single aperture and one derived from bearing estimates, with the region of highest correlation corresponding to emitter location. Hypothesized in-phase and quadrature signals corresponding to an emitter location describe what the signals received at the aperture should be if the emitter is of a predetermined frequency and at a predetermined location, with these estimates used in the maximum likelihood algorithm.
    Type: Grant
    Filed: September 10, 2009
    Date of Patent: May 15, 2012
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Arnold D. Seifer, Donald B. Spencer
  • Patent number: 8174447
    Abstract: An apparatus for localizing a position on a path, radio signals of fixedly positioned radio transmitters being receivable along the path, the apparatus including a determiner for determining properties of the radio signals of the fixedly positioned radio transmitters at the position, and a comparator for comparing the determined electromagnetic properties with previously recorded properties which characterize a reference path, and for determining a relation between the position and the reference path on the basis of a result of the comparison.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: May 8, 2012
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
    Inventors: Karin Loidl, Steffen Meyer, Juergen Hupp
  • Publication number: 20120098705
    Abstract: A mobile computing device comprises a wireless transceiver and a processing circuit. The processing circuit is configured to store a data set for a predetermined location, the data set comprising location data and a location name. The processing circuit is further configured to compare a current location to the location data, to compare an updated location to the location data at a time calculated based on heuristic data, and to generate a notification message based on the mobile computing device arriving proximate to the predetermined location.
    Type: Application
    Filed: October 22, 2010
    Publication date: April 26, 2012
    Inventors: Karl Yost, Gadi Naveh
  • Patent number: 8138967
    Abstract: A multilateration system and method includes a plurality of receiver stations for receiving signals from an aircraft, and a controller that derives the position of the aircraft by applying a multilateration process to outputs from the receiver stations. For this purpose, the controller determines the altitude of the aircraft and selects a multilateration process that is to be used for position determination, based on the determined altitude.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: March 20, 2012
    Assignee: Roke Manor Research Limited
    Inventor: Robert J. Weedon
  • Patent number: 8138976
    Abstract: 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 positioning problem (e.g., UTDOA). Weighted least squares methods are typically used by TDOA and related location systems including TDOA/AOA and TDOA/GPS hybrid systems. The incorporated characteristics include empirical information about TDOA errors and the probability distribution of the mobile position relative to other network elements. A technique is provided for modeling the TDOA error distribution and the a priori mobile position. A method for computing a MAP decision metric is provided using the new probability distribution models. Testing with field data shows that this method yields significant improvement over existing weighted least squares methods.
    Type: Grant
    Filed: April 14, 2011
    Date of Patent: March 20, 2012
    Assignee: TruePosition, Inc.
    Inventors: Pete A. Boyer, Rashidus S. Mia, Edward Joseph Segall
  • Patent number: 8138938
    Abstract: A system and method for determining the position and orientation of a handheld device relative to a known object is presented. The system comprises a handheld device having an inertial measurement unit and a sighting device, such as a laser pointer, that are used to determine the position of the handheld device relative to a target object, such as a structure, aircraft, or vehicle. The method comprises calibrating a handheld device to find the current location of the handheld device relative to a target object, tracking the movement of the handheld device using an inertial measurement unit, and presenting an updated position of the handheld device relative to a target object.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: March 20, 2012
    Assignee: The Boeing Company
    Inventors: James J. Troy, Christopher Esposito
  • Patent number: 8140045
    Abstract: A semiconductor device is provided with a power supply circuit having a function to generate a power supply voltage from a wireless signal and an A/D converter circuit having a function to detect the strength of the wireless signal by an A/D conversion of a voltage generated from the wireless signal. This enables to provide a semiconductor device which does not require replacement of batteries, has few limitations on its physical shape and mass, and has a function to detect a physical position. By formation of the semiconductor device with use of a thin film transistor formed over a plastic substrate, a lightweight semiconductor device, which has flexibility in physical shape and a function to detect a physical location, can be provided at low cost.
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: March 20, 2012
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiyuki Kurokawa, Takayuki Ikeda, Masami Endo, Hiroki Dembo, Daisuke Kawae, Takayuki Inoue, Munehiro Kozuma
  • Patent number: 8138974
    Abstract: A location estimation method using label propagation. The achieved location estimation method is robust to variations in radio signal strengths and is highly accurate by using the q-norm (0<q<1), especially, for calculating the similarities among radio signal strength vectors. The accuracy in location estimation is further improved by putting more importance on the time-series similarities. Specifically, the time-series similarity is calculated by using time-series values indicating the temporal order of radio signal strengths during the measurement. If the time-series similarity is larger than the similarity between the radio signal strength vectors, the time-series similarity is preferentially used. The exponential attenuation function can also be used for calculating the similarities, instead of the q norm (0<q<1).
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: March 20, 2012
    Assignee: International Busines Machines Corporation
    Inventors: Shohei Hido, Tsuyoshi Ide, Hisashi Kashima, Shoko Suzuki, Akira Tajima, Rikiya Takahashi, Toshihiro Takahashi, Yuta Tsuboi
  • Publication number: 20120050098
    Abstract: A method and apparatus determines if a location fix received by a mobile station using a non-GPS location techniques is accurate. Location results obtained using the non-GPS location technique or techniques are treated as accurate if they are verified as being within an error margin obtained from a trusted source of location information such as a GPS positioning system. Non-GPS Location information may be obtained from a signal transmitted by the base station, which signal includes the base station location. The non-GPS location information may also be obtained from a backend service associated with the wireless network that includes the base station.
    Type: Application
    Filed: August 30, 2010
    Publication date: March 1, 2012
    Applicant: MICROSOFT CORPORATION
    Inventors: Thomas Werner Kuehnel, Mark Lino Nielsen
  • Publication number: 20120044109
    Abstract: Systems, devices, features, and/or methods for determining a location of a mobile device are disclosed. A method may include (a) receiving, into a mobile device, a common RF signal on a common carrier frequency, wherein the common RF signal includes a respective RF signal output by each of three or more transmitters on a common time basis in a round-robin manner, and wherein each of the three or more transmitters is positioned at a known location, (b) capturing data representing the common RF signal, (c) based on the captured data, discriminating between each respective RF signal that forms the received common RF signal, (d) determining a relative phase shift of each respective RF signal, and (e) determining the location of the mobile device based on the determined relative phase shifts and the known locations of the three or more transmitters.
    Type: Application
    Filed: August 17, 2010
    Publication date: February 23, 2012
    Inventor: Charles J. Rieger, III
  • Patent number: 8106816
    Abstract: A set of device parameters consisting of clock bias and position of a mobile device is determined without previous knowledge of the week number (WN) in that solutions of a set of equations derived from a least squares type weight function involving pseudoranges related to the device parameters via basic equations are attempted with a time of week (TOW) extracted from satellite signals and various week number candidates. A solution algorithm which iteratively solves the set of equations is used, each iteration step involving a linearization of the latter and resulting in corrections of the device parameters. After elimination of week numbers where the solution algorithm does not yield a solution a valid week number is selected from the remaining week numbers in that a deviation value is determined which reflects differential terms, i.e., differences between pseudorange values as measured and as derived from the set of device parameters according to the solution, e.g., by evaluation of the weight function.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: January 31, 2012
    Assignee: u-blox AG
    Inventors: Daniel Ammann, Etienne Favey, Christoph Schmid
  • Patent number: 8106828
    Abstract: 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 wireless television signals. In addition, the apparatus includes a processor to select one or more of a plurality of possible locations of the remote device based on the first measurements and a plurality of associations each associating one of the possible locations with expected values. Moreover, the receiver receives second measurements of the wireless television signals made by one or more monitor units, and the processor generates the expected values for the first measurements and the associations based on the second measurements and the locations of the one or more monitor units.
    Type: Grant
    Filed: September 12, 2008
    Date of Patent: January 31, 2012
    Assignee: TruePosition, Inc.
    Inventors: Ju-Yong Do, Andy Lee, David Gotwisner, Dimitri Rubin, Matthew Rabinowitz
  • Patent number: 8102317
    Abstract: 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 possible locations of the apparatus are selected based on identities of the television channels identified by the measurement circuit and a plurality of associations each associating one of the possible locations with identities of the television channels expected at one of the possible locations.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: January 24, 2012
    Assignee: TruePosition, Inc.
    Inventors: Andy Lee, James J. Spilker, Jr., Matthew Rabinowitz, Jimmy K. Omura
  • Patent number: 8102314
    Abstract: The invention relates to a position-finding method for determing the location of a mobile object. The features, for example received field strengths, of a plurality of base stations are measured, and the object position is located from these features, using a reference map. During an initialization process, a reference map is created which comprises a multiplicity of positions and the associated feature-dependent values. During use of the method, a plurality of position-finding processes are carried out, by means of each of which a measured feature-dependent value and from this, a located position of the object, are determined using the predetermined reference map. The predetermined reference map is in each case updated for at least some of the positions found, during which updates, the feature-dependent values are each corrected by a correction term at the support points of the reference map in a predetermined area surrounding an object position.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: January 24, 2012
    Assignee: Siemens Enterprise Communications GmbH & Co. KG
    Inventors: Joachim Bamberger, Bruno Betoni Parodi, Joachim Horn, Henning Lenz, Andrei Szabo
  • Patent number: 8102315
    Abstract: An algorithm of collecting and constructing training location data is provided as it is applied to a test space of a plurality of beacons and training locations. The signal patterns of beacons adjacent to each training location are detected. The signal pattern is converted into a signal vector and each signal vector is integrated for calculating a feature vector of each training location. The coordinate and the feature vector of each training location, after being recorded, are introduced into a numerical data fitting model for constructing the signal pattern function of each beacon. For positioning, the current signal patterns of the beacons adjacent to the user location are detected and converted to a discriminant function. Thereafter, the minimum of the discriminant function is computed so as to find the position of the user location.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: January 24, 2012
    Assignee: Industrial Technology Research Institute
    Inventors: Sheng-Po Kuo, Yu-Chee Tseng, Yueh-Feng Lee
  • Publication number: 20120013509
    Abstract: Provided are architectures, systems, methods, and computer program products for real-time object locating and position determination using frequency channel diversity for transmitting and receiving position determination signals including bursts of location signals. Channelized frequency diversity of a short burst of small location signals that “hop” across multiple frequency channels is used to collectively produce a quasi-wideband position determination signal. Object tags operating with frequency channel diversity for transmitting location signals of position determination signals require low power consumption, but can still efficiently provide adequate position determination signals for reliable position determination.
    Type: Application
    Filed: July 14, 2010
    Publication date: January 19, 2012
    Inventors: David S. Wisherd, James J. O'Hagan
  • Patent number: 8098155
    Abstract: A method for locating a target wireless device is disclosed. At least one directional antenna is swept through a field of view at each of a plurality of sensing locations. A position is determined for each of the plurality of sensing locations. During the sweep at each of the plurality of sensing locations, a set of signal strength data for the target wireless device and a set of bearing information are collected. A plurality of lines of bearing are determined, one from each of the plurality of sensing locations to the target wireless device, based on the determined position, the collected set of signal strength data, and bearing information for each of the plurality of sensing locations. A target location of the target wireless device is determined based on an intersection of at least two lines of bearing from the plurality of lines of bearing.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: January 17, 2012
    Assignee: Assured Information Security, Inc.
    Inventors: Richard Michael Gloo, Jacob Michael Baker, Alexander James Williams, Jason S. Lashure, Robert James Durham, Nicholas Lawrence Owens
  • Patent number: 8098200
    Abstract: A method and system determine a location of an emitter using at least three sensors, each receiving a signal from the emitter. Cross-correlation data is determined for the received signals at sensor pairs, and one or more peaks are identified in the cross-correlation data. A likelihood function is determined for each sensor pair. A total likelihood function is determined for the sensors using the likelihood functions for each sensor pair, and the location of the emitter is determined as the point where the total likelihood function is maximized. The individual likelihood function for each sensor pair can be determined by selecting, at each point in a grid, a peak in the cross-correlation data that generates a minimum residual according to a minimum residual criterion, and using the selected peak in the cross-correlation data for each point in the grid to calculate the likelihood function.
    Type: Grant
    Filed: August 12, 2009
    Date of Patent: January 17, 2012
    Assignee: Agilent Technologies, Inc.
    Inventor: David L. Gines
  • Publication number: 20120007779
    Abstract: A location and tracking system (1) comprises a site survey tool (2), a location engine (3), a self-calibration engine (4), and a fingerprint database (5). The system (1) operates for a wireless network of access points in a building and it generates from initialization data a model of the physical environment. The model may for example be in the form of data representing geometry of lines in plan and signal attenuation values for the lines. The system then uses this model to generate a fingerprint of projected signal strengths in the environment. The system may maintains a fingerprint for every environment model or there may be only one model at any one time, or there may be a number. Where the latter, the system may assign a weighting to each model to indicate its confidence value.
    Type: Application
    Filed: March 18, 2010
    Publication date: January 12, 2012
    Inventors: Martin Klepal, Widyawan, Dirk Pesch
  • Patent number: 8089391
    Abstract: A weather radar system or method can be utilized to determine a location of a weather hazard for an aircraft. The weather radar system can utilize processing electronics coupled to an antenna. The processing electronics can determine presence of the hazard in response to data related to returns received by the weather radar antenna and data from a lightning sensor. The system can include a display for showing the hazard and its location.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: January 3, 2012
    Assignee: Rockwell Collins, Inc.
    Inventors: Daniel L. Woodell, Kevin M. Kronfeld
  • Publication number: 20110316748
    Abstract: A device for estimating a current orientation of a mobile terminal device at a current geographical position, wherein, at the current geographical position, a current measurement package may be determined which has a transmitter identification and an electromagnetic signal characteristic of a radio transmitter which may be received at the current geographical position with the current orientation of the mobile terminal device at a current measurement time, with a determiner for determining an accordance measure between the current measurement package and a reference measurement package, which has a transmitter identification, a reference orientation and an electromagnetic signal characteristic of a reference radio transmitter which was receivable at a geographical reference position allocated to the reference measurement package with the reference orientation at a reference time lying before the current measurement time, a selector for selecting at least one reference measurement package which has an accordan
    Type: Application
    Filed: April 22, 2011
    Publication date: December 29, 2011
    Inventors: Steffen Meyer, Juergen Hupp, Stephan Haimerl
  • Publication number: 20110309983
    Abstract: One embodiment of the invention includes a computer readable medium configured to perform a method for determining a three-dimensional geolocation of a terrestrial emitter. The method includes receiving a signal from the emitter at an antenna array. The method also includes determining a three-dimensional line-of-position (LOP) to the emitter based on the signal. The three-dimensional LOP can include an azimuth angle and a depression angle. The method further includes calculating the three-dimensional geolocation of the emitter based on an intersection of the three-dimensional LOP with digital terrain elevation data (DTED) associated with the Earth's surface.
    Type: Application
    Filed: June 21, 2011
    Publication date: December 22, 2011
    Inventors: Tyler Holzer, Bart Peters, David T. Driggs, Greg Manassero
  • Patent number: 8081111
    Abstract: A method of locating the source of an unknown signal is provided that includes calculating a differential offset for a signal for each of a plurality of positions within a region in which the transmitter must lie, for each of a series of times m with respect to first and second signal relays and respective first and second receivers, the positions of the signal relays and receivers being known, generating a cross-ambiguity function (CAF) using data corresponding to samples of the unknown signal received at the first and second receivers via the first and second signal relays respectively, estimating the level of noise in the CAF, and using this data to obtain a measure of the likelihood that the source is located within defined areas within the region, where the differential offsets are differential time offsets, or differential frequency offsets, or both. The method provides location which is unconditionally convergent.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: December 20, 2011
    Assignee: Kratos Defense and Security Solutions, Inc.
    Inventor: David Patrick Haworth
  • Publication number: 20110304503
    Abstract: The simultaneous localization and RF modeling technique pertains to a method of providing simultaneous localization and radio frequency (RF) modeling. In one embodiment, the technique operates in a space with wireless local area network coverage (or other RF transmitters). Users carrying Wi-Fi-enabled devices traverse this space while the mobile devices record the Received Signal Strength (RSS) measurements corresponding to access points (APs) in view at various unknown locations and report these RSS measurements, as well as nay other available location fix to a localization server. A RF modeling algorithm runs on the server and is used to estimate the location of the APs using the recorded RSSI measurements and any other available location information. All of the observations are constrained by the physics of wireless propagation. The technique models these constraints and uses a genetic algorithm to solve them, thereby providing an absolute location of the mobile device.
    Type: Application
    Filed: June 15, 2010
    Publication date: December 15, 2011
    Applicant: MICROSOFT CORPORATION
    Inventors: Krishna Kant Chintalapudi, Venkata N. Padmanabhan, Anand Padmanabha Iyer
  • Patent number: 8077659
    Abstract: Estimating a current location of a receiver in a MediaFLO™ (Forward Link Only) mobile multimedia multicast system comprises receiving digital signals comprising a MediaFLO™ superframe comprising orthogonal frequency division multiplexing (OFDM) symbols; performing slot 3 processing of each medium access control (MAC) time unit of a data channel to identify a transmitter identity (TxID) of each transmitter; identifying corresponding geographical coordinates of each TxID; regenerating the digital signals for each of the transmitters using a local-area differentiator (LID) and a wide-area differentiator (WID) of the transmitters; dividing the digital signals by the corresponding regenerated transmitted signal to obtain channel estimates between the receiver and the corresponding transmitters; detecting a first peak in the channel estimates to determine a distance between the receiver and the corresponding transmitters; calculating a time difference of arrival of the digital signals; and estimating a current loca
    Type: Grant
    Filed: April 28, 2008
    Date of Patent: December 13, 2011
    Assignee: Newport Media, Inc.
    Inventor: Nabil Yousef