By Deflected Or Repeated Signal Patents (Class 342/453)
  • Patent number: 10705179
    Abstract: Within several applications the ability to localize an individual within an environment is beneficial. However, existing indoor localization approaches depend upon at least one of two assumptions. First, the subject(s) localization is achieved by localizing a wireless device carried by the subject and second, wireless fingerprints are established for the localization via a site survey being performed before a system can actually localize the subject(s). However, in many application scenarios, neither of the above two assumptions are true, namely that the user is not carrying an active wireless device or that the site has been surveyed. Accordingly, embodiments of the invention provide for subject localization by a dynamic calibration of wireless signals between a receiver and a transmitter, where neither the receiver or transmitter are associated with an electronic device carried or worn by the subject.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: July 7, 2020
    Assignee: TANDEMLAUNCH
    Inventors: Yi Gao, Michel Allegue Martinez, Xi Chen, Xue Liu
  • Patent number: 10649061
    Abstract: A method is described for determining a position of a user device in relation to a vehicle, the vehicle including first and second receivers. The method includes transmitting a positioning signal by the transmitter of the user device, receiving the positioning signal by the first receiver and by the second receiver arranged at a distance from the first receiver, in at least one of the first and second receivers, receiving and identifying a reflected positioning signal reflected at a ground surface before reaching the first and second receivers, performing time synchronization between the transmitter and the first and second receiver, determining a position of the user device in a three-dimensional coordinate system based on a time-of-flight of the positioning signal received in the first and second receivers and on a time-of-flight of at least one reflected positioning signal received by at least one of the first and second receivers.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: May 12, 2020
    Assignee: VOLVO CAR CORPORATION
    Inventor: Ulf Bjorkengren
  • Patent number: 10575276
    Abstract: A processing system collects data points, wherein each data point indicates a location of user equipment in a telecommunication service provider network at a point in time, generates, for a first data point, a set of features over a plurality of time windows, wherein the set includes time series features, estimates an importance of each feature, wherein the importance indicates an accuracy with which the feature allows for estimation of an unseen location of the user equipment, wherein the unseen location is a location that is not identified in the plurality of data points, selects a threshold number of features from the set, wherein the threshold number of features have a greatest importance relative to all features in the set, generates a plurality of predictions of the unseen location, using the threshold number of features, aggregates the plurality of predictions, and estimates the unseen location based on the aggregating.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: February 25, 2020
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Rudolph Mappus, Vijayan Nagarajan, Abhishek Mishra
  • Patent number: 10309784
    Abstract: In one embodiment, a method of tracking multiple objects with a probabilistic hypothesis density filter is provided. The method includes generating a first intensity by combining a first one or more measurements, wherein a first set of track IDs associated with the first intensity includes track IDs corresponding to respective measurements in the first one or more measurements. A second intensity is generated by combining a second one or more measurements, wherein a second set of track IDs associated with the second intensity includes track IDs corresponding to respective measurements in the second one or more measurements. The first set of track IDs is compared to the second set of track IDs, and the first intensity is selectively merged with the second intensity based on whether any track IDs in the first set of track IDs match any track IDs in the second set of track IDs.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: June 4, 2019
    Assignee: Honeywell International Inc.
    Inventors: Vibhor L. Bageshwar, Michael Ray Elgersma, Eric A. Euteneuer
  • Patent number: 10295660
    Abstract: Techniques are described for aligning optical components within a LIDAR assembly. The techniques may be performed to align the optical components during manufacturing or assembly of the LIDAR assembly. For example, a first optical element (e.g., one of a light source or light sensor) may be installed in the LIDAR assembly. An optimal alignment for a second optical element (e.g., the other of the light source or light sensor) may be determined and the second optical element may be installed at the optimal alignment. The optimal alignment for the second optical element may be determined based on detected signals, for example, which may correspond to an alignment resulting in a strongest return signal, highest quality return signal, and/or minimal interference. Additionally, or alternatively, techniques may be used to align optical components at runtime by using an actuator to move one or more components of the LIDAR assembly during operation.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: May 21, 2019
    Assignee: Panosense Inc.
    Inventors: Ryan McMichael, Adam Berger, Brian Pilnick, Denis Nikitin, Brian Alexander Pesch
  • Patent number: 10291348
    Abstract: A system includes a disabling device with a radio circuit configured to disrupt communication having a predetermined protocol; and a movable device including a radio circuit to receive the communication, wherein the radio circuit sends the protocol to disable the movable device.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: May 14, 2019
    Inventor: Bao Tran
  • Patent number: 10175339
    Abstract: The invention relates to a method and to a mobile receiver for determining a position of a mobile receiver RX, which moves in an unknown but at least quasi-stationary environment, on the basis of signals s(kT) which are emitted by a transmitter TX positioned at an unknown position and immobile in the environment, wherein the receiver RX receives as reception signal q ? ( k , ? ) = ? i = 0 N ? ( k ) - 1 ? S i ? ( ? ) a signal s(kT) which is emitted by the transmitter TX and which is transmitted via N(k) transmission paths as signal components si(?), where k:=time step, ?:=time delay, and i=0, . . .
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: January 8, 2019
    Assignee: Deutsches Zentrum für Luft-und Raumfahrt e.V.
    Inventors: Christian Gentner, Thomas Jost
  • Patent number: 10031235
    Abstract: An object is to make it possible to determine and output an accurate current position reliably in a short time and at a low cost, even in environments where signals from positioning satellites are complicatedly affected by structures, geographical features, etc. Therefore, the present invention provides a position detection device comprising: a receiving unit receiving signals from a positioning satellite, and calculating a pseudo range to the positioning satellite based on the signals, and a positioning unit calculating an initial position based on the pseudo range calculated by the receiving unit, calculating the pseudo range to the positioning satellite at plural positions around the initial position using a three-dimensional map data and a ray-tracing method, selecting candidate positions from the plural positions based on the pseudo range, and deciding a current position based on the candidate positions within such a short distance from the initial position that predetermined conditions are satisfied.
    Type: Grant
    Filed: May 14, 2014
    Date of Patent: July 24, 2018
    Assignee: THE FOUNDATION FOR THE PROMOTION OF INDUSTRIAL SCIENCE
    Inventors: Shunsuke Kamijo, Shunsuke Miura
  • Patent number: 10026323
    Abstract: An unmanned aerial system (UAS) position reporting system may include an air traffic control reporting system (ATC-RS) coupled with a ground control station (GCS) of a UAS and at least one remote terminal. The ATC-RS may include an automatic dependent surveillance broadcast (ADS-B) and traffic information services broadcast (TIS-B) transceiver and one or more telecommunications modems. The ATC-RS may receive position data of at least one UAS in an airspace from the GCS and the at least one remote terminal and selectively communicate the position of the at least one UAS in the airspace to a civilian air traffic control center (ATC), to a military command and control (C2) communication center, or to both through the ADS-B and TIS-B transceiver. The ATC-RS may display the position of the at least one UAS in the airspace on a display screen coupled with the ATC-RS.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: July 17, 2018
    Assignee: Kutta Technologies, Inc.
    Inventors: Douglas V. Limbaugh, David H. Barnhard, Thomas H. Rychener
  • Patent number: 9841439
    Abstract: An electromagnetic wave identification device includes a detection section for detecting an electromagnetic wave signal which is output from an antenna for detecting electromagnetic waves and whose level is equal to or greater than a predetermined level; a measurement and record section for recording and storing the detected electromagnetic wave waveform data; and an analysis and evaluation section for receiving the recorded and stored electromagnetic wave waveform data, normalizing the electromagnetic wave waveform data by an maximum amplitude value to obtain normalized data, and determining whether or not the received electromagnetic wave is a direct wave by reference to the normalized data.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: December 12, 2017
    Assignee: KYUSHU INSTITUTE OF TECHNOLOGY
    Inventors: Shinya Ohtsuka, Toshitake Umegane, Hiroki Shibata
  • Patent number: 9835709
    Abstract: A system to provide privacy from third party vehicles includes a radio circuit configured to send a privacy indication in a beacon frame; and a movable device including a radio circuit to receive the beacon frame and a motor actuator controlled to comply with the privacy indication.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: December 5, 2017
    Inventor: Bao Tran
  • Patent number: 9829560
    Abstract: Some embodiments use scanning devices to characterize radio signals received at a number of locations within a geographical area of interest. The signal characteristics along with the location information associated with the characteristics are stored in a centralized reference database. A mobile device characterizes signals it receives at a certain location and compares the characteristics with the signal characteristics stored in the reference database to obtain accurate location information of the certain location.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: November 28, 2017
    Assignee: GOLBA LLC
    Inventor: Mehran Moshfeghi
  • Patent number: 9766339
    Abstract: A global positioning system (GPS) and Doppler augmentation (GDAUG) end receiver (GDER) can include a GDAUG module. The GDAUG module can generate a GDER position using a time of flight (TOF) of a transponded GPS signal and a Doppler shift in a GDAUG satellite (GSAT) signal. The transponded GPS signal sent from a GSAT to the GDER can include a frequency shifted copy of a GPS signal from a GPS satellite to the GSAT. The GSAT signal can include a signal generated by the GSAT to the GDER.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: September 19, 2017
    Assignee: Raytheon Company
    Inventors: Ian S. Robinson, Mark R. Skidmore
  • Patent number: 9755797
    Abstract: A method of accurate 3D positioning with reduced cost is proposed. A user equipment (UE) receives a plurality of positioning reference signals (PRSs) from a plurality of base stations. The plurality of base stations includes a serving base station and two neighboring base stations. The UE estimates a plurality of line-of-sight (LOS) paths and corresponding indexes of the PRSs for time of arrival (TOA) and time difference of arrival (TDOA) measurements. The UE then estimates an elevation angle of the UE based on the estimated LOS paths of the PRS from the serving base station. Finally, the system (either UE or network, depending on where the coordinates are) can calculate the UE position based on the TDOA measurements and the elevation angle.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: September 5, 2017
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Wen-Rong Wu, Yun-Kai Wang
  • Patent number: 9733352
    Abstract: According to an embodiment, positioning system includes transmitter apparatus transmits radio wave and receiver apparatus receives target echo. Transmitter apparatus comprises first receiver and transmitter. First receiver receives GPS signal and outputs reference signal. Transmitter transmits radio wave at time interval based on reference signal. The receiver apparatus includes second receiver, detector and first and second calculators. Second receiver receives GPS signal and outputs time information. Detector receives target echo and outputs reception signal added received time information. First calculator calculates Doppler frequency based on reception frequency and transmission frequency. Second calculator calculates time difference of echo based on Doppler frequency. Detector sets time filter to receive next pulse based on time difference and time information of reception signal.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: August 15, 2017
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventor: Hirokazu Shimomaki
  • Patent number: 9710971
    Abstract: An information processing device includes: a memory; and a processor coupled to the memory and configured to: calculate, based on a figure of a reference object recognized from a first input image, position information with respect to the reference object, the positional information indicating an image-capturing position of the first input image, and generate setting information in which display data is associated with the position information with respect to the reference object as a display position of the display data, the display data being displayed based on the setting information when the reference object is recognized from a second input image different from the first input image.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: July 18, 2017
    Assignee: FUJITSU LIMITED
    Inventor: Ryouta Komatsu
  • Patent number: 9654449
    Abstract: The invention includes methods for authenticating access between devices when the devices are within a geospatial boundary comprising the first step of keeping track of the physical position of the devices using both low and, or high fidelity geospatial positioning techniques. Next, a first device determines whether any nearby mobile devices have entered the geospatial boundary. Next, the first device determines if any of the mobile devices are peers eligible for cryptographic authentication. After the first device authenticates that the other device within the geospatial boundary is a trusted peer, the devices may perform various data and, or dynamic policy operations.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: May 16, 2017
    Assignee: SAIFE, Inc.
    Inventors: Ty B Lindteigen, James Chester Jones
  • Patent number: 9595198
    Abstract: An unmanned aerial system (UAS) position reporting system may include an air traffic control reporting system (ATC-RS) coupled with a ground control station (GCS) of a UAS and at least one network-connected remote terminal. The ATC-RS may include an automatic dependent surveillance broadcast (ADS-B) and traffic information services broadcast (TIS-B) transceiver and one or more telecommunications modems. The ATC-RS may receive position data of at least one UAS in an airspace from the GCS and the at least one network-connected remote terminal and selectively communicate the position of the at least one UAS in the airspace to a civilian air traffic control center (ATC), to a military command and control (C2) communication center, or to both through the ADS-B and TIS-B transceiver. The ATC-RS may display the position of the at least one UAS in the airspace on a display screen coupled with the ATC-RS.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: March 14, 2017
    Assignee: Kutta Technologies, Inc.
    Inventors: Douglas V. Limbaugh, David H. Barnhard, Thomas H. Rychener
  • Patent number: 9562774
    Abstract: A guidance device includes: a storing unit that stores information regarding content, a reproduction time of the content, and a providing range different from each content; a calculation unit that acquires a current position of a user and calculates a movement status; a selection unit that estimates, based on the movement status of the user calculated by the calculation unit, a position of the user at a time when the reproduction time of the content has passed, and selects from the storing unit content whose content providing range includes the estimated position.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: February 7, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yuhei Shimada, Manabu Ueda, Yuichi Ueno
  • Patent number: 9439041
    Abstract: In a system facilitating the calibration of a map-point grid for an indoor location determination, the grid includes several map points, each having a radio frequency (RF) data fingerprint being associated therewith. At least one of: (i) RF signal data from several RF sources, (ii) a user specified location indication, and (ii) tracking data from a sensor, the tracking data indicating a user's movement relative to a base map point, are received. The map-point grid is updated based on, at least in part, at least one of (i) adjusted RF data, the received RF data being adjusted using systematic analysis thereof, (ii) the tracking data, and (iii) the location indication. A user's location may be determined based on the fingerprints associated with the map-point grid, and sensor data.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: September 6, 2016
    Assignee: Lighthouse Signal Systems, LLC
    Inventors: Parviz Parvizi, Mohammad Heidari
  • Patent number: 9423507
    Abstract: The present invention relates generally to methods and apparatuses for estimating and correcting for multipath in GNSS navigation systems. According to some aspects, the invention operates in situations where position and estimated position error are reasonably stable so as to detect when large multipath errors are present with confidence. After detection, the slowly varying biases from multipath or other un-modeled sources can be modeled separately from the navigation state. The measurements are kept in the solution without biasing the navigation state thereby ignoring the long-term biases for use over short-term periods with minimized pseudorange error when necessary.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: August 23, 2016
    Assignee: CSR TECHNOLOGY INC.
    Inventors: Xiangdong Lin, David Allan Tuck, Mangesh Chansarkar
  • Patent number: 9389301
    Abstract: Various embodiments provide a method and apparatus for determining tag location by using one or more estimated channel responses (CR) that characterize the wireless channel between the tag and one or more respective anchors. In particular, a tracking server in communication with the anchor(s) determines the tag's location based on a comparison of the estimated CR(s) with a set of stored CRs associated with the anchor(s).
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: July 12, 2016
    Assignee: Alcatel Lucent
    Inventors: Howard Huang, Dragan Samardzija, Irwin Kennedy, Stefan Valentin, Dmitry Chizhik, Gregory Wright, Sarabjot Singh
  • Patent number: 9386422
    Abstract: A non-transitory processor-readable medium storing code representing instructions to be executed by a processor includes code to cause the processor to receive from a wireless access point (WAP) device frequency-domain data associated with signals received at the WAP device from a wireless device during a time period. The code includes code to determine multiple frequency-domain magnitudes associated with the frequency-domain data for the time period to define a spectral magnitude signature associated with the frequency-domain data. Each frequency-domain magnitude from the multiple frequency-domain magnitudes is uniquely associated with a frequency bin from multiple mutually-exclusive frequency bins associated with the frequency domain data. The code also includes code to identify a spectral response deviation associated with the spectral magnitude signature and send a location identifier associated with a location of the wireless device based on the spectral response deviation.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: July 5, 2016
    Assignee: Juniper Networks, Inc.
    Inventor: David B. Aragon
  • Patent number: 9366762
    Abstract: A method and device for detecting the presence of a deception scheme intended to thwart a satellite navigation system (SNS). A detector receives “receiver measurements” of various types from the SNS receiver. It conditions these values, so that they may be readily used by a process that determines whether the receiver is operating in a statistically normal state.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: June 14, 2016
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Christopher B. Smith, Michael A. Koets, Michael D. Lillywhite
  • Patent number: 9304184
    Abstract: A method for increasing accuracy of geolocation based on timing measurements of RF signals. The method includes: (a) receiving at a user one or more RF signals transmitted over time, (b) correlating the received signals with a plurality of replica waveforms, (c) creating a first set of estimates of the time or arrivals of the signals at the user, (d) using the first set of estimates to create a plurality of models, wherein each model assumes that some of the measurements are affected by multipath or interference, (e) testing the models to estimate the likelihood of timing measurements for each model, and (f) determining the set of LOS measurements as one associated with a model having the largest likelihood.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: April 5, 2016
    Assignee: The Boeing Company
    Inventors: Alexandr Draganov, Franklin M. Haas, Jr., Marc A. Harlacher
  • Patent number: 9281887
    Abstract: The invention concerns a method for optimizing antenna pattern assignment for a first wireless communication device forming a wireless network with at least one second wireless communication device, each of said communication device being equipped with a multi-sector antenna, an antenna pattern being a combination of said antenna sectors, said communication devices being adapted for sending a request and for receiving a response using a current antenna pattern assignment, said method comprising a step of: evaluating by said first communication device a first value; sending by said first communication device to said second communication device a broadcast request comprising said value receiving by said first communication device, a response to said broadcast request, said response being sent by said second communication device, said response depending on a second value evaluated by said second device; Switching or not, by said first communication device, to a new antenna sector assignment depending on said
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: March 8, 2016
    Assignee: Thomson Licensing
    Inventors: Theodoros Salonidis, Anand Prabhu Subramanian, Henrik Lundgren, Don Towsley
  • Patent number: 9229111
    Abstract: A method includes estimating a position of a receiver, aboard a moving object, on the basis of the navigation signals emitted by satellites received by an antenna in an antenna array placed on the moving object, and using a three-dimensional geographical map to deduce, geometrically, on the basis of the position of the receiver and of a ray casting starting from the receiver, the number of paths reflected on walls of buildings present in a scene corresponding to an environment surrounding the receiver. The determined number of reflected paths is used to initialize an algorithm for estimating angles of arrival of multi-paths to deduce therefrom angles of arrival of the paths reflected on the walls before reaching the receiver. Optionally, the method can comprise making it possible to bound the distance information error due to a multi-path to render the estimation of direction of arrival of the signals more efficacious.
    Type: Grant
    Filed: February 10, 2013
    Date of Patent: January 5, 2016
    Assignees: THALES, CENTRE NATIONAL D'ETUDES SPATIALES (CNES)
    Inventors: Michel Monnerat, Lionel Ries
  • Patent number: 9215556
    Abstract: A system and method for determining the location of wireless sensors are disclosed. The system may generally include a plurality of wireless sensor nodes communicatively coupled to a plurality of sensing devices. Additionally, the system may include a paging device configured to wirelessly transmit a page command to at least one of the wireless sensor nodes. Further, the paging device may receive a position indicator as a text string indicating a location of at least one of the plurality of wireless sensor nodes.
    Type: Grant
    Filed: February 11, 2014
    Date of Patent: December 15, 2015
    Assignee: General Electric Company
    Inventors: Boris Leonid Sheikman, Raymond Verle Jensen
  • Patent number: 9140788
    Abstract: In a method for ascertaining whether a target object can be driven over by the controlled motor vehicle, with the aid of frequency-modulated radar signals of a radar sensor, amplitude ratios between received radar signals reflected from the target object are utilized, the received radar signals corresponding to signals which have been transmitted in different frequency ranges. Based on the amplitude ratios, an occurrence of interference between (i) a first radar signal propagation path between the radar sensor and the target object and (ii) a second propagation path with additional reflection from a road is detected, and based on the detection of an occurrence of interference it is ascertained whether the object can be driven over.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: September 22, 2015
    Assignee: ROBERT BOSCH GMBH
    Inventors: Goetz Kuehnle, Michael Schoor
  • Patent number: 9129520
    Abstract: An unmanned aerial system (UAS) position reporting system may include an air traffic control reporting system (ATC-RS) coupled with a ground control station (GCS) of an unmanned aerial system. The ATC-RS may include an automatic dependent surveillance broadcast (ADS-B) and traffic information services broadcast (TIS-B) transceiver and one or more telecommunications modems. The ATC-RS may be adapted to receive position data of the UAS in an airspace from the GCS and to selectively communicate the position of the UAS in the airspace to a civilian air traffic control center (ATC), to a military command and control (C2) communication center, or to both the civilian ATC and the military C2 communication center through the ADS-B and TIS-B transceiver. The ATC-RS may also be adapted to display the position of the UAS in the airspace on a display screen coupled with the ATC-RS.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: September 8, 2015
    Assignee: Kutta Technologies, Inc.
    Inventors: Douglas V. Limbaugh, David H. Barnhard, Thomas H. Rychener
  • Patent number: 9128182
    Abstract: A radar receiver has plural antenna system processors each for performing coherent integration on the basis of correlation values between a reception signal and a transmission signal using correction amounts for phase variations corresponding to plural Doppler frequencies, plural correlation matrix generators for generating, for each of the plural different Doppler frequencies, correlation matrices which are pieces of phase difference information relating to an arrangement of reception antennas on the basis of sets of outputs of the coherent integration, respectively, an adder for adding together outputs of the plural correlation matrix generators, and an incoming direction estimator for estimating an incoming direction of reflection waves on the basis of outputs of the adder.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: September 8, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takaaki Kishigami, Yoichi Nakagawa, Hirohito Mukai
  • Patent number: 9046602
    Abstract: The location of a transmitter can be determined by accurately measuring the elapsed time that it takes for a signal to propagate from a transmission source to a plurality of disparate receivers of a known location. By comparing the received transmitted signal to reference signal a range between each receiver and the transmitter can be determined. By intersecting the spheres defined by each range an accurate location of the transmitter can be obtained.
    Type: Grant
    Filed: May 1, 2012
    Date of Patent: June 2, 2015
    Assignee: EIDO, LLC
    Inventors: Barry L. Gardner, Richard W. Koralek
  • Patent number: 9042917
    Abstract: Techniques for positioning access points and terminals in WLANs and other wireless networks are described. For access point positioning, measurements are obtained for at least one access point in a WLAN. The measurements may be based on transmission sequences (e.g., beacon frames) transmitted periodically by each access point. The measurements may be made by multiple terminals at different locations or a single mobile terminal at different locations. The location of each access point is determined based on the measurements and known locations of the terminal(s). For terminal positioning, measurements for at least one access point in a WLAN are obtained. The location of the terminal is determined based on the measurements and known location of each access point. The measurements may be round trip time (RTT) measurements, observed time difference (OTD) measurements, time of arrival (TOA) measurements, signal strength measurements, signal quality measurements, etc.
    Type: Grant
    Filed: November 7, 2006
    Date of Patent: May 26, 2015
    Assignee: QUALCOMM Incorporated
    Inventor: Stephen W. Edge
  • Patent number: 8995902
    Abstract: A method for Link 16-based geolocation of hostile jammers comprising the steps of collecting jamming noise I/Q samples at a plurality of locations, determining the relative time delay of reception between two or more of the locations, determining the first derivative of the time delay of reception between the two or more locations, and using the results calculated in the preceding step to determine the position of the hostile jammers.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: March 31, 2015
    Assignee: BAE Systems Information and Electronic System Integration Inc.
    Inventor: Joel D. Reiss
  • Patent number: 8965393
    Abstract: A method of using a non-GPS-derived technique to estimate the location of an Assisted-GPS-enabled wireless terminal for the purposes of generating location-specific assistance data for the wireless terminal is disclosed. The wireless terminal then uses the assistance data to acquire and process one or more GPS signals and to derive information that is probative of the wireless terminal's location. The GPS-derived location information is then combined with non-GPS-derived location to form an estimate of the location of the wireless terminal that is better than can be derived from either alone. This combination of GPS-derived and non-GPS techniques is particularly useful when the wireless terminal can only acquire one or two GPS signals because it is not possible to determine the location of the wireless terminal with only two GPS signals alone.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: February 24, 2015
    Assignee: Polaris Wireless, Inc.
    Inventor: Tarun Kumar Bhattacharya
  • Patent number: 8886458
    Abstract: A neighborhood creating device includes: a memory; and one or more processors that execute a procedure in the memory, the procedure including a position acquiring process that acquires position information representing a position of a mobile object; a data creating process that creates mobile object data representing a condition associated with a movable range of the mobile object based on the position information; a data acquiring process that acquires obstacle data representing a condition associated with a place through which the mobile object is not able to move; and an information creating process that creates neighborhood information satisfying both conditions represented by the mobile object data and the obstacle data and continuously representing a movable range of the mobile object around the mobile object.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: November 11, 2014
    Assignee: Fujitsu Limited
    Inventor: Hisatoshi Yamaoka
  • Patent number: 8879607
    Abstract: A method and a system for storing a constant path loss exponent corresponding to free space; transmitting a signal; receiving the signal via a rake receiver of a user device; identifying a maximum received signal strength based on a signal strength associated with the signal relative to fingers of the rake receiver; storing a current maximum received signal strength value; determining whether the current maximum received signal strength value is a first maximum received signal strength value; calculating a current indoor position of the user device based on the constant path loss exponent and the current maximum received signal strength value when a determination is that the current maximum received signal strength value is the first maximum received signal strength value; and outputting the current indoor position.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: November 4, 2014
    Assignees: Sony Corporation, Sony Mobile Communications AB
    Inventor: Carl Filip Erik Skarp
  • Patent number: 8836579
    Abstract: A method is disclosed for merging detection information produced by various sensors of a detection system formed by a passive radar system including various bistatic bases and by an external sensor. The method includes two processing phases. During the first phase, for each bistatic base of the passive radar bistatic plots produced by that bistatic base are first merged with bistatic plots produced on the basis of plots transmitted by the external sensor and projected into the bistatic base concerned. Then, by associating all the bistatic bases, bistatic tracking is applied to the merged bistatic plots and unmerged bistatic plots coming from the external sensor. During the second phase a cartesian tracking is generated on the basis of bistatic plots that contributed to forming the bistatic tracks.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: September 16, 2014
    Assignee: Thales
    Inventors: Sébastien Allam, Nicolas Millet, Mathieu Klein
  • Patent number: 8682351
    Abstract: A system including a first wireless device and a second wireless network device. The first wireless network device is configured to transmit a data frame a first number of times, wherein the first number of times is determined based on a timing resolution associated with the first wireless network device, receive a respective acknowledgement frame in response to each transmission of the data frame, determine an accumulated delay period corresponding to a total time between each transmission of the data frame and reception of the respective acknowledgement frame, and calculate a distance between the first wireless network device and the second wireless network device based on the accumulated delay period and the first number of times. The second wireless network device is configured to receive each transmission of the data frame and transmit the respective acknowledgement frame in response to each transmission of the data frame.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: March 25, 2014
    Assignee: Marvell International Ltd.
    Inventor: Kapil Chhabra
  • Patent number: 8619908
    Abstract: A wireless ranging system for determining a range of a remote wireless device may include a wireless transmitter and a wireless receiver. The wireless ranging system may also include a ranging controller to cooperate with the wireless transmitter and receiver to generate a multi-carrier base waveform, transmit a sounder waveform to the remote wireless device including concatenated copies of the multi-carrier base waveform, and receive a return waveform from the remote wireless device in response to the sounder waveform. The ranging controller may also generate time domain samples from the return waveform, convert the time domain samples into frequency domain data, and process the frequency domain data to determine the range of the remote wireless device.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: December 31, 2013
    Assignee: Harris Corporation
    Inventors: John E. Hoffmann, Carlos G. Abascal, Christopher D. Moffatt
  • Patent number: 8588789
    Abstract: A method of operation of a mobile communication system includes: receiving a base carrier frequency signal from a cell tower location; generating a power spectral density from the base carrier frequency signal; measuring a Rician K factor from the power spectral density; estimating a line-of-sight Doppler frequency based on the base carrier frequency signal; determining the cell tower location based on the Rician K factor; and activating a handover decision handler based on the cell tower location.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: November 19, 2013
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Sungsoo Kim, Inyup Kang, Jungwon Lee
  • Publication number: 20130300609
    Abstract: In a vehicle inclination detecting device, a receiving unit includes a switching unit for alternately switching between a received signal from a first receiving antenna and a received signal from a second receiving antenna to alternately output the received signals to an orthogonal detector. The orthogonal detector carries out orthogonal detection on each of the two received signals from the switching unit and an oscillating signal from an oscillator by using an identical line.
    Type: Application
    Filed: March 16, 2012
    Publication date: November 14, 2013
    Applicant: Mitsubishi Electric Corporation
    Inventors: Masahiro Watanabe, Wataru Tsujita, Kenji Inomata, Takashi Ohsawa, Masahiro Shikai
  • Patent number: 8547279
    Abstract: Provided are a device and a method that can classify an incoming wave and can correctly distinguish the position of an originating device, even in a multipath environment. A principal vertically polarized wave arrival direction sensing unit (104-1) and a principal horizontally polarized wave arrival direction sensing unit (104-2) respectively sense the arrival direction of a principal wave by sensing the arrival direction in which the maximum reception level is obtained. An incoming wave classifying decision unit (108) determines that a direct wave has arrived when the difference between the principal wave arrival direction sensed by the principal vertically polarized wave arrival direction sensing unit (104-1) and the principal wave arrival direction sensed by the principal horizontally polarized wave arrival direction sensing unit (104-2) is within a prescribed threshold value, and determines that a direct wave has not arrived when the difference is greater than the threshold value.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: October 1, 2013
    Assignee: Panasonic Corporation
    Inventors: Takafumi Tokuhiro, Takashi Motoyama, Yutaka Saito
  • Patent number: 8483720
    Abstract: A system and method is provided for processing communication signals in a wireless personal area network (WPAN) using a transceiver comprising a first transmitter and a first receiver operable to transmit and receive signals using a first transmission protocol and a second transmitter operable to transmit signals using a second transmission protocol. In various embodiments, the first receiver is used to receive a first signal that was transmitted using the first communication protocol and the second transmitter is used to transmit a second signal using the second transmission protocol in response to receipt of the first signal. The second signal is then processed to determine the location of the object. In some embodiments, the first transmission protocol is compliant with an Institute of Electrical and Electronics Engineers 802.15.4 transmission protocol and the second transmission protocol is compliant with an Ultra-Wide Band (UWB) protocol.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: July 9, 2013
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Shahin Farahani, Kuor-Hsin Chang, Clinton C Powell
  • Patent number: 8478294
    Abstract: A system and method for locating mobile stations in a wireless communication system such as a cellular system based on at least one received wireless signal and a database of geographical information.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: July 2, 2013
    Assignee: Nice-Systems Ltd.
    Inventors: Moshe Levin, Avraham Freedman, Adam Weinberg, Meir Veisberg, Ori Nurick
  • Patent number: 8432253
    Abstract: Active RFID technologies are used to tag assets and people within buildings or open areas, such as parking lots or military bases; and to identify, preferably within a few meters, the real-time location (RTL) of the tag, i.e. to create a real-time location system, known as an RTLS. A novel and complex algorithm is provided that combines signal strength computations with factors that incorporate physical realities, such as walls and floors, to determine a tag's real-time location more accurately.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: April 30, 2013
    Assignee: Al-Qemmah Letechnologia Al-Ma'Loumat Co. (SIMTIX)
    Inventors: Robert Ainsbury, Immad Adawiya, Khalid Omar
  • Patent number: 8380362
    Abstract: Methods and architecture systems for controlling vehicle systems are disclosed. In one embodiment, a method of remotely controlling a vehicle includes estimating a position of the vehicle. A position estimation algorithm may estimate the position of the vehicle. A position data packet received from the vehicle may be used to update the estimated position of the vehicle. A display device may display a virtual representation of the vehicle based on the updated estimated position of the vehicle. Command signals may be transmitted to the vehicle based on the displayed virtual representation of the vehicle.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: February 19, 2013
    Assignee: The Boeing Company
    Inventor: William C. Beavin
  • Patent number: 8373591
    Abstract: A system for sensing aircraft and other objects uses bistatic radar with spread-spectrum signals transmitted from remotely located sources such as aircraft flying at very high altitudes or from a satellite constellation. A bistatic spread spectrum radar system using a satellite constellation can be integrated with a communications system and/or with a system using long baseline radar interferometry to validate the digital terrain elevation database. The reliability and safety of TCAS and ADS-B are improved by using the signals transmitted from a TCAS or ADS-B unit as a radar transmitter with a receiver used to receive reflections. Aircraft and other objects using spread spectrum radar are detected by using two separate receiving systems. Cross-Correlation between the outputs of the two receiving systems reveals whether a noise signal is produced by the receiving systems themselves or is coming from the outside.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: February 12, 2013
    Inventor: Jed Margolin
  • Patent number: 8359052
    Abstract: A first wireless device including a control module and a transmitter. The control module is configured to estimate a first path loss between the first wireless device and a second wireless device, estimate a second path loss between the first wireless device and the second wireless device, generate an absolute value of a difference between the first path loss and the second path loss, and compare the absolute value of the difference between the first path loss and the second path loss to a predetermined threshold. The transmitter is configured to transmit a radio frequency signal at the first minimum transmit power in response to the absolute value of the difference being less than or equal to the predetermined threshold, and transmit the radio frequency signal at a second minimum transmit power in response to the absolute value being greater than the predetermined threshold.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: January 22, 2013
    Assignee: Marvell International Ltd.
    Inventor: Kapil Chhabra
  • Patent number: 8355739
    Abstract: An RF transceiver of a first network device respectively receives first, second, and third coordinates of second, third, and fourth network devices. A control module determines first, second, and third delay periods respectively corresponding to transmissions between first and second, first and third, and first and fourth network devices. The control module determines first, second, and third distances between the first and second, first and third, and first and fourth network devices respectively based on the first, second, and third delay periods. The control module determines a location of the first network device based on the first, second, and third distances and the first, second, and third coordinates.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: January 15, 2013
    Assignee: Marvell International Ltd.
    Inventor: Kapil Chhabra