Triangulation Patents (Class 342/126)
  • Patent number: 10653337
    Abstract: A method includes transmitting one or more local transmit radar signals and receiving a plurality of local receive radar signals that corresponds to the one or more local transmit radar signals being reflected or refracted off an object. The method further includes processing the plurality of local receive radar signals to determine a relative position of the object. The method further includes determining whether the object is positioned within a desired detection volume associated with a position of the transmitter section. When the object is positioned within the desired detection volume, further processing the local receive radar signals to determine movement pattern of the object and whether the movement pattern of the object is within a range of plausible movements for the object. When the movement pattern of the object is within a range of plausible movements for the object, tracking movement of the object within the desired detection volume.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: May 19, 2020
    Inventors: Timothy W. Markison, Sayfe Kiaei, Gary McCoy
  • Patent number: 10551195
    Abstract: The invention relates to a portable device with improved sensor position change detection. It aims at detecting a change of position of a mobile device relative to a user and, based on this change of position, a change of orientation of the mobile device relative to the user. This allows, when the orientation of the mobile device suddenly changes relative to a user, to keep track of this change. This is particularly useful for position tracking techniques such as Pedestrian Dead Recognition (PDR), which rely on an iterative determination of the orientation of a mobile device relative to the user, and may be affected by a sudden and important change of this relative orientation.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: February 4, 2020
    Assignee: Movea
    Inventor: Antoine Lemarchand
  • Patent number: 10527685
    Abstract: Object of the present invention is a system for detecting the spatial position and tracking the movement of one or more objects provided with RFID Tags, said objects possibly being positionable on a suitable limited surface, which constitutes the test space. Such objective is achieved realizing a suitable sensorized test surface, on which elements provided with RFID identifier and magnetic marker can be positioned, possibly moved and monitored. Said surface houses a single RFID antenna dimensioned and positioned in such a way as to cover the entire area of interest, and able to read the tags of possible objects, coupled with a series of magnetic sensors, which are positioned in such a way as to ensure the coverage of the test area and whose measuring ranges may also be different according to the peculiarities of the areas of interest (overall area, precision of detection required, presence of particular areas of interest, etc.) and are partially overlapped.
    Type: Grant
    Filed: May 3, 2016
    Date of Patent: January 7, 2020
    Assignee: XPLORED SRL
    Inventor: Enrico Garofalo
  • Patent number: 10500479
    Abstract: A media processing unit may identify, automatically based on game play data relating to game events of a sporting event and a set of source selection rules, different media portions from different media sources to include in the media coverage of a particular sporting event. Each of the different media sources may be configured to deliver different media related to the sporting event. The media processing unit determines a plurality of media mappings, which each associate a media portions with a game portions. Based on the determined media mappings, for each game portion, a media processing unit may select a media portion delivery to a user as media coverage of the game portion.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: December 10, 2019
    Assignee: VenueNext, Inc.
    Inventors: Kunaldeep Malik, Gideon Yu, Paraag Marathe, Jonathan Dubin
  • Patent number: 10436888
    Abstract: Disclosed is a system and method for a hybrid radar system that integrates frequency-modulated continuous wave (FMCW) mode and interferometry mode. The radar works as a time division system that continuously switches between the FMCW mode and interferometry mode. The FMCW mode is responsible for absolute range detection and the interferometry mode takes cares of the weak physiological movement monitoring. The respective accuracies in range detection and displacement measurement complements the advantages of the two radar modes, providing versatile performance. By steering the antenna beam, the proposed radar system becomes an ideal solution for indoor health care, human localization, and human-computer interaction. Objects or human targets with or without stationary clutters can be precisely located. At the same time, the targets' vital signs and gestures can be monitored.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: October 8, 2019
    Assignee: Texas Tech University System
    Inventors: Changzhi Li, Guochao Wang
  • Patent number: 10429488
    Abstract: A system for identifying a real-world geographic location of an emission source emitting electromagnetic energy includes a platform configured for movement and an apparatus disposed on the platform and configured to collect and process, in a passive manner and during movement of the platform, at least a pair of successive samples of the electromagnetic energy emission and define angular and spatial coordinates of the emission source. The apparatus includes at least a pair of antennas, a receiver coupled to antennas and a processor executing a predetermined logic.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: October 1, 2019
    Assignee: NOKOMIS, INC.
    Inventors: Walter J. Keller, III, Jennting Timothy Hsu
  • Patent number: 10359503
    Abstract: The present invention provides a position estimation apparatus, a position estimation system, and a position estimation method that can estimate, with high accuracy, the position of a wireless device, the position of which is unknown, as well as a recording medium for position estimation.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: July 23, 2019
    Assignee: NEC CORPORATION
    Inventor: Hiroyuki Igura
  • Patent number: 10326927
    Abstract: The distance information producing apparatus includes a distance information producing unit producing, on a basis of a phase difference between paired image signals for phase difference detection obtained by image capturing of an image capturing area, distance information showing a distribution of object distances in the image capturing area, and a reliability information producing unit producing reliability information showing a reliability of the distance information, by using at least one of an evaluation value relating to an edge of at least one of the paired image signals, an evaluation value relating to a contrast of the at least one of the paired image signals and an evaluation value relating to a degree of correlation between the paired image signals.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: June 18, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takashi Sasaki
  • Patent number: 10310621
    Abstract: This document describes techniques using, and devices embodying, radar gesture sensing using existing data protocols. These techniques and devices enable transmitting data according to an existing data protocol, modulating the data on a radar field to transmit to another device, and sensing user gestures by analyzing reflections of portions of transmitted data by the transmitting or receiving device. Techniques are also described to filter received signals based on addressing information in the transmitted data to limit gesture recognition at a receiving device to transmitting devices known to the receiver.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: June 4, 2019
    Assignee: Google LLC
    Inventors: Jaime Lien, Patrick M. Amihood, Hakim Kader Bhai Raja
  • Patent number: 10176349
    Abstract: A control system for indoor position and vector tracking includes a plurality of radio frequency (RF) transmitters to detect a mobile radio frequency identification (RFID) tag. The control system includes an intelligent controller to receive location information from the RF transmitters and to calculate a vector associated with the mobile RFID tag. The intelligent controller may utilize the vector as a control input to an algorithm for selecting a control operation for one or more of plurality of networked devices.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: January 8, 2019
    Assignee: Kacchip, LLC
    Inventor: Michael C. Mountz
  • Patent number: 10114118
    Abstract: A radar device 1 equipped with a radar antenna 2. Specifically, this radar device 1 comprises a housing 3, a transmitting unit 6, and a receiving unit 7. The housing 3 has a first wall component 3R and a second wall component 3L that are opposite each other. The transmitting unit 6 is attached on the first wall component 3R side in an internal space of the housing 3, and is configured to transmit radar signal through the radar antenna 2. The receiving unit 7 is attached on the second wall component 3L side in the internal space of the housing, is disposed opposite the transmitting unit 6, and is configured to receive reflected wave of the radar signal through the radar antenna 2.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: October 30, 2018
    Assignee: FURUNO ELECTRIC COMPANY LIMITED
    Inventors: Koji Atsumi, Tatsunori Tanaka
  • Patent number: 10109057
    Abstract: Asynchronous information is provided by a sensor having a matrix of pixels disposed opposite the scene. The asynchronous information includes, for each pixel of the matrix, successive events originating from this pixel, that may depend on variations of light in the scene. A model representing the tracked shape of an object is updated after detecting events attributed to this object in the asynchronous information. Following detection, the updating of the model includes an association of a point of the model with the event detected by minimizing a criterion of distance with respect to the pixel of the matrix from which the detected event originates. The updated model is then determined as a function of the pixel of the matrix from which the detected event originates and attributed to the object and of the associated point in the model, independently of the associations performed before the detection of this event.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: October 23, 2018
    Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE—CNRS, UNIVERSITE PIERRE ET MARIE CURIE (PARIS 6)
    Inventors: Ryad Benosman, Siohoi Ieng, Stephane Regnier, Ni Zhenjiang
  • Patent number: 10088563
    Abstract: A subsurface detection system may be capable of sensing a buried feature and providing an estimate of the feature's depth. Such a subsurface detection system may comprise a signal generator transmitting at least one signal toward a buried feature and at least one signal along a plurality of various length paths. Each of a plurality of correlators may be associated with one of the various length paths and receive both a signal reflected by the feature and a signal transmitted along one of the various length paths. Each of the correlators may correspond to a distance to the buried feature. As the reflected signal reaches each correlator it may identify a time offset between the arrival of the reflected signal and the signal transmitted along one of the various length paths. By so doing, a distance to the buried feature may be estimated by detecting the correlator with the shortest time offset.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: October 2, 2018
    Assignee: NOVATEK IP, LLC
    Inventors: David R. Hall, David C. Wahlquist
  • Patent number: 10006770
    Abstract: A remote geolocation system is provided including an inertial navigation unit (INU) having orthogonally disposed three axis accelerometers/gyroscopes in a strap down configuration in a case, a laser range finder (LRF) aligned with one INU axis, a GPS, and machine instructions that create a virtual INU (VINU) used to determine orientation of the case at an activation point (AP) when the LRF is pointed at a target, take sequences of global positioning satellites (GPS) location data and inertial measuring unit (IMU) orientation measurements from a starting location to the AP, draw a line between the starting location and the AP, identify a longitude line (LL) passing through the line, align one VINU axis with the LL, align another VINU axis with INU detected gravity, and align a remaining VINU axis with the LRF's output at the AP.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: June 26, 2018
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventor: John Hamilton
  • Patent number: 9943760
    Abstract: A game console includes a receiver that receives motion data in response to motion of a gaming object. A trajectory generation module generates trajectory data based on the motion data and based on a motion prediction model. A processor executes a gaming application based on the trajectory data to generate display data.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: April 17, 2018
    Assignee: AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD
    Inventors: Ahmadreza (Reza) Rofougaran, Maryam Rofougaran, Nambirajan Seshadri, Brima B. Ibrahim, John Walley, Jeyhan Karaoguz
  • Patent number: 9832602
    Abstract: A method and system is described where a plurality of position reference devices use short-range wireless communication protocols to transmit positioning assistance data to nearby mobile devices, and the mobile devices use the assistance data to model errors and re-calibrate their positioning systems. The short-range communication methods include NFC, RFID, Bluetooth®, short-range 802.11, Wi-Fi Direct, and high frequency focused beams such as 60 GHz. The position reference devices are passive or active NFC tags, passive or active RFID tags, other devices that include such tags as their components, Bluetooth®-enabled devices, 60 GHz-enabled devices, and 802.11 access points that can lower their transmit power. The reference devices are located at various indoor and outdoor locations such as smart posters, kiosks, ATM machines, malls, store checkout counters, store security gates, wireless access points, cellular base-stations, tollbooths, traffic lights, and street lamp posts.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: November 28, 2017
    Assignee: GOLBA LLC
    Inventor: Mehran Moshfeghi
  • Patent number: 9749921
    Abstract: Systems and methods to instruct a mobile device to switch from a first protocol to a second protocol after registering the device on a network associated with the first protocol. This may be done to obtain a cryptographic key used by the device. For example, for some communication protocols, such as 3G and 4G communication protocols, obtaining the cryptographic key is difficult. However, the 2G communication protocol uses a cryptographic key that is easier to obtain. Only after obtaining the key, the phone instructed to again switch to the first communication protocol. During the exchange of communication, the user is likely to be holding the phone at his ear, such that he is unlikely to notice that the phone is using the first communication protocol. Hence, the exchange of communication may be decrypted and monitored, without the user noticing anything amiss.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: August 29, 2017
    Assignee: VERINT SYSTEMS LTD.
    Inventor: Ishay Barlev
  • Patent number: 9699760
    Abstract: Embodiments of the present invention provide a positioning processing method, apparatus, and system. The method includes: acquiring coexistence interference information of a terminal; instructing, according to the coexistence interference information, the terminal to perform measurement on a suitable positioning signal resource; and positioning the terminal based on a positioning measurement result reported by the terminal. According to the positioning processing method, apparatus, and system provided in the embodiments of the present invention, precision of terminal positioning can be improved.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: July 4, 2017
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Jie Cui, Dengkun Xiao, Zhuo Chen
  • Patent number: 9581688
    Abstract: A pulse radar apparatus is disclosed. The pulse radar apparatus includes a pulse generation unit, a receiver unit, a synchronization unit, and a switch unit. The pulse generation unit generates a pulse based on a transmission trigger signal having a transmission pulse repetition period, and sends the pulse to a target via a transmission antenna. The synchronization unit generates the transmission trigger signal using an external reference clock, provides the transmission trigger signal to the pulse generation unit, and generates a plurality of clock signals having a time delay with respect to the transmission pulse trigger signal using the external reference clock. The switch unit selects any one clock signal from the plurality of clock signals in response to an external selection signal, and provides the selected clock signal to a receiver unit which utilizes a sampler with provided sampling clocks.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: February 28, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Pil-Jae Park, Cheon-Soo Kim, Seong-Do Kim, Sung-Chul Woo
  • Patent number: 9523767
    Abstract: A game console includes a receiver that receives motion data in response to motion of a gaming object. A trajectory generation module generates trajectory data based on the motion data and based on a motion prediction model. A processor executes a gaming application based on the trajectory data to generate display data.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: December 20, 2016
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza (Reza) Rofougaran, Maryam Rofougaran, Nambirajan Seshadri, Brima B. Ibrahim, John Walley, Jeyhan Karaoguz
  • Patent number: 9519054
    Abstract: A method for reconstructing a dielectric image using electromagnetic waves, comprising: acquiring a measurement value of the electromagnetic waves; generating a matching system matrixes between the meshes; generating a smoothed dyadic Green's function matrix; generating an electromagnetic wave calculation value; calculating a misfit error between the acquired electromagnetic wave measurement value and the generated electromagnetic wave calculation value, and checking whether a change of the calculated misfit error satisfies a predetermined optimization determination condition; updating dielectric parameters at the meshes; and outputting a reconstructed dielectric image in the image reconstruction region.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: December 13, 2016
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Bo Ra Kim, Nikolai Simonov, Seong-Ho Son, Soon Ik Jeon, Hyuk Je Kim, Jong Moon Lee, Hyung Do Choi
  • Patent number: 9499184
    Abstract: A method of determining a position of a vehicle on a guideway includes detecting a position of the vehicle relative to a first reflective positioning element along the guideway. The method also includes detecting a unique identification code of a transponder along the guideway, wherein the transponder is located a first known distance along the guideway from the first reflective positioning element. The method further includes determining the position of the vehicle, using a position determining system, based on a modulated reflection signal received from the transponder, a first non-modulated reflection signal received from the first reflective positioning element, and the first known distance.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: November 22, 2016
    Assignee: Thales Canada Inc
    Inventors: Carl Schwellnus, Colin Bantin
  • Patent number: 9501522
    Abstract: This disclosure describes a method, system and computer-program product for parallelized feature selection. The method, system and computer-program product may be used to access a first set of features, wherein the first set of features includes multiple features, wherein the features are characterized by a variance measure, and wherein accessing the first set of features includes using a computing system to access the features, determine components of a covariance matrix, the components of the covariance matrix indicating a covariance with respect to pairs of features in the first set, and select multiple features from the first set, wherein selecting is based on the determined components of the covariance matrix and an amount of the variance measure attributable to the selected multiple features, and wherein selecting the multiple features includes executing a greedy search performed using parallelized computation.
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: November 22, 2016
    Assignee: SAS Institute Inc.
    Inventors: Zheng Zhao, James Cox, David Duling, Warren Sarle
  • Patent number: 9407000
    Abstract: Method for deploying an antenna involves selectively determining an optimal position for at least one defining point of an antenna based on one or more parameters associated with a wireless communication session. Responsive to this determining, an unmanned aerial vehicle is automatically controlled to suspend at least one portion of the antenna aloft in a controlled position based on the optimal position. The antenna is coupled to a wireless communication device which is disposed on the ground. The method involves using the antenna while aloft to conducting the wireless communication session while the wireless communication device is disposed on the ground.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: August 2, 2016
    Assignee: Harris Corporation
    Inventor: Benjamin J. Willistein
  • Patent number: 9333996
    Abstract: A system is disclosed having a primary vehicle and a secondary vehicle that is carried by the primary vehicle when not in use. The system further includes at least one of an immobilizing device to immobilize the primary vehicle if the secondary vehicle is removed from the primary vehicle, a data storage device for storing information regarding usage of the primary and secondary vehicles, a user interface device for displaying information regarding usage of the primary and secondary vehicles, and a user prompt for providing information regarding potential opportunities for use of the secondary vehicle to encourage usage of the secondary vehicle and lower CO2 emissions.
    Type: Grant
    Filed: July 23, 2014
    Date of Patent: May 10, 2016
    Assignee: Ford Global Technologies, LLC
    Inventors: Torsten Gerhardt, Marcus Hurst, Robert Spahl, David Burrage
  • Patent number: 9207306
    Abstract: A process measurement instrument includes a fiducial and is adapted for detection of the fiducial. The instrument includes an interface circuit comprising a drive circuit for transmitting a pulse signal at the fiducial and at a target of interest and a receive circuit receiving reflected echoes of the pulse signal and developing an analog receive signal representative of the reflected echoes. A processing circuit is operatively coupled to the interface circuit for receiving the analog receive signal and comprising a threshold detector detecting if the analog receive signal is above a select threshold value. A controller is operatively coupled to the processing circuit and responsive to leading and trailing edges of the reflected echo for the fiducial and determining an average of the leading and trailing edges to determine location of the fiducial.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: December 8, 2015
    Assignee: Magnetrol International, Inc.
    Inventors: Christopher P. Turcotte, Michael J. Linden
  • Patent number: 9176222
    Abstract: A method and apparatus are provided for locating an obstacle between a transmitter and a receiver. The method includes: determining at least one elliptical ring in which the obstacle is situated, the elliptical ring being defined by two confocal ellipses, having their focuses corresponding to the transmitter and to the receiver, each elliptical ring being associated with a physical echo generated by an obstacle; estimating a distance between the obstacle and a focus as a function of the separation between the confocal ellipses at the obstacle in a plane normal to the axis defined by the focuses so as to obtain a set of potential location zones for the obstacle in the elliptical ring; and lifting the ambiguity between the various potential location zones of the obstacle so as to deliver a location zone of the obstacle.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: November 3, 2015
    Assignee: FRANCE TELECOM
    Inventors: Isabelle Siaud, Anne-Marie Ulmer-Moll
  • Patent number: 8948238
    Abstract: Apparatus, the apparatus having at least one processor and at least one memory having computer-readable code stored thereon which when executed controls the at least one processor to perform a method comprising: obtaining in-phase and quadrature samples of a received radio signal at least first and second discrete instances in time; processing the samples to provide information relating to the amplitude and/or phase of the received radio signal at the first and second instances in time; using the amplitude and/or phase information of the received radio signal at the first and second instances in time to determine whether interference is present on the received radio signal; forwarding the complex signal parameters for processing if interference is determined not to be present; and discarding the complex signal parameters without forwarding them for processing if interference is determined to be present.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: February 3, 2015
    Assignee: Nokia Corporation
    Inventors: Ville Valtteri Ranki, Antti Paavo TapaniKainulainen, Fabio Belloni
  • Patent number: 8836344
    Abstract: In one aspect, a method to detect an object in an area includes forming a wireless network among a plurality of nodes, each of the nodes being configured to generate an electromagnetic field (EMF) in the area and determining changes in the EMF between two nodes based on: a first difference in received signal strength values between a previously determined received signal strength value and a currently determined received signal strength value, a second difference in received signal strength values between the currently determined received signal strength value and an average received signal strength value and a third difference in link quality values between a previously determined link quality value and a currently determined link quality value. The method further comprises detecting the object based on the changes in the EMF.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: September 16, 2014
    Assignee: Raytheon Company
    Inventors: Toni S. Habib, Wassim S. Habib, Teh-Kuang Lung
  • Patent number: 8823491
    Abstract: Disclosed are an object locator system, a method and a program storage device. In the embodiments, radio frequency identification (RFID) tags are on objects within a defined area and each RFID tag can be activated by an RF activation signal. When a request (e.g., a verbal or keyed-in request) to locate a specific object is received from a specific user, the required permission to locate the object is verified and, optionally, the identity of the specific user is authenticated. Once the required permission is verified and the identity of the specific user is authenticated, one of three RFID readers transmits an RF activation signal. RF response signals received back at the three RFID readers from the specific object's RFID tag are used to triangulate the position of the specific object. Once determined, the position is communicated (e.g., by map display, verbal message, or text message) to the specific user.
    Type: Grant
    Filed: January 12, 2012
    Date of Patent: September 2, 2014
    Assignee: International Business Machines Corporation
    Inventors: Shawn M. Luke, Michael R. Ouellette, Karl V. Swanke, Sebastian T. Ventrone
  • Patent number: 8773264
    Abstract: An intrusion detection and tracking system includes a plurality of nodes, a DP and a gateway. The nodes are disposed about an area and form a wireless network to be monitored, the nodes are configured to receive data and transmit data frames with a signal strength indicator and/or a link quality indicator in the frames. The DP is communicatively connected to the network and configured to analyze variations in the signal strength indicator and/or link quality indicator to detect and track disturbances to an electromagnetic field in the area. The gateway is configured to form a data link between the network and the DP.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: July 8, 2014
    Assignee: Raytheon Company
    Inventors: Toni S. Habib, Wassim S. Habib
  • Patent number: 8704702
    Abstract: The invention relates to a method for estimating an object motion characteristic from a radar signal. The method comprises the step of receiving radar data of an object from a multiple beam radar system. Further, the method comprises the steps of associating radar data with estimated height and/or cross-range information of object parts causing the corresponding radar data and fitting an object model with radar data being associated with a selected estimated height and/or cross-range information interval. The method also comprises the step of determining an object motion characteristic from the fitted object model.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: April 22, 2014
    Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk Onderzoek TNO
    Inventor: Philip van Dorp
  • 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: 8660815
    Abstract: A method of filtering noise in a three-dimensional position measurement system comprising receiving distance data representative of the respective distances between at least four spatially dispersed known points and an unknown point, performing triangulation calculations to determine at least two solutions to the three dimensional position of the unknown point relative to the known points, calculating a symmetrical bounding surface such as a sphere or cube which just encloses the said solutions, comparing the maximum dimension of the bounding surface with a first predetermined error threshold, and if the maximum dimension is less than the first error threshold, determining the center position of the bounding surface and outputting the center position as a noise-filtered position for the unknown point.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: February 25, 2014
    Assignee: Performance Designed Products LLC
    Inventors: Steven Lavache, Richard Baxter
  • Patent number: 8654002
    Abstract: The present disclosure relates to a method for monitoring targets on a runway, wherein emitting modules and receiving modules are alternately distributed along each one of longitudinal sides of the runway. Orthogonal signals are emitted in a narrowband by the emitting modules and coherently received in a coherent manner by the receiving modules. An object is detected on the runway on the basis of a distribution of the modules into meshes each including three pairs of neighbouring emitting modules and receiving modules and on the basis of a radio location of the object through triangulation and interferometry in at least one mesh. The modules are also used for analyzing a target moving on the runway, and for monitoring the trajectographies of an air target in the surroundings of the runway.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: February 18, 2014
    Assignee: ONERA (Office National d'Etudes et de Recherche Aerospatiales)
    Inventor: Marc Lesturgie
  • Patent number: 8624774
    Abstract: The invention concerns a method and system of locating objects by means of UWB signals, the system including a search device (D1), incorporated in a portable apparatus (11) and provided with a pair of antennae (A1, A2), and at least one target device (D2) attached to an object sought (12). The target device (D2) includes, in addition to the transceiver (34, 35), a very low power consumption wake up receiver (46) which, when the target device is in a standby state, can receive a UWB wake up signal to switch on said device. This target device is arranged for measuring a time difference (tdiff) between the respective receptions of two locating signals respectively emitted by the two antennae (A1, A2) of the search device and for transmitting said time difference in a return signal that further contains, in a preferred variant, a signal processing time (trproc). Thus, it is not necessary for the two devices to be synchronized.
    Type: Grant
    Filed: March 17, 2011
    Date of Patent: January 7, 2014
    Assignee: The Swatch Group Research and Development Ltd
    Inventor: Luca De Rosa
  • Patent number: 8525725
    Abstract: The present disclosure describes a method and system for detecting and determining the position of a target or intruder using a plurality of sensors positioned throughout a secured perimeter and a single antenna. The system of the present disclosure detects and determines the position of a target by first analyzing the return signal strength values of each of the sensors. Next, Zvalues for each of the sensors are calculated. Based on the Zvalues, certain sensors are selected to compute a signal strength center-of-mass location, which is then used to determine the position of the target.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: September 3, 2013
    Assignee: Lockheed Martin Corporation
    Inventors: Vibeke Libby, Troy E. Wenski, Allen R. Lorenz
  • Patent number: 8416120
    Abstract: Disclosed herein is a method of sensor network localization through reconstruction of a radiation pattern with a characteristic value of an antenna depending on orientation thereof. The method can minimize errors using an antenna characteristic value and a signal strength depending on the orientation. In addition, the method can minimize errors using an artificial neural network to characterize a distorted radiation pattern of an antenna and using it for the localization of a triangulation method. Furthermore, the method can increases the localization rate even in a passive localization method by characterizing an asymmetric antenna radiation pattern and constructing the antenna characteristic through an artificial neural network.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: April 9, 2013
    Assignee: Sungkyunkwan University Foundation for Corporate Collaboration
    Inventors: Jong Tae Kim, Chae Seok Lim
  • Patent number: 8380218
    Abstract: The present invention is related to an apparatus and method for determining the location of a communication device within a wireless network in order to provide a geolocation functionality to the communication device participating under an access protocol of a wireless local-area network (WLAN) infrastructure such as IEEE 802.11 or Hiperlan. The apparatus comprises at least two transponder units for communicating with the communication device when the communication device is situated in a coverage area of the wireless network and a processing unit for deriving the location of the communication device within the coverage area in dependence on information received from the transponder units.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: February 19, 2013
    Assignee: International Business Machines Corporation
    Inventors: Fritz Gfeller, Walter Hirt
  • 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
  • Patent number: 8326320
    Abstract: The present invention relates to a method for locating at least one mobile radio subscriber in a mobile radio network, wherein to each transmitting station a value correlated with the receive field strength of a signal from this transmitting station is allocated; including the following steps: a) from the information determined upon connection setup, a table is created per cell, in which at least one distance parameter to the transmitting station of the cell is allocated to the respective receive field strengths; b) for at least one value correlated with the receive field strength and transmitted in the measurement report, the allocated distance parameter to the transmitting station of the respective cell is read out from the table created in step a); and c) determining at least one point satisfying the distance parameter(s) read-out in step b).
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: December 4, 2012
    Assignee: Tektronix, Inc.
    Inventors: Karsten Gaenger, Jens Plogsties, Ralf Kreher, Armin Klopfer
  • Patent number: 8320934
    Abstract: A system and method of dynamically updating an almanac of base stations with wireless phones that are controlled by end users. First, second, and third location information are received respectfully from a first, second, and third wireless phones. A position of each wireless device is known. The distance between each wireless device an uncooperative base station is determined while accounting for an uncertainty factor. A location of the uncooperative base station is calculated using the first, second, and third location information and the distances. The almanac is updated with the location.
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: November 27, 2012
    Assignee: QUALCOMM Incorporated
    Inventor: Leonid Sheynblat
  • 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: 8219111
    Abstract: A linear least squares (LLS) estimator provides a low complexity estimation of the location of a mobile terminal (MT), using one of the fixed terminals (FTs) as a reference FT to derive a linear model. A method for selecting a reference FT is disclosed, which improves the location accuracy relative to an arbitrary approach to selecting the reference FT. In addition, a covariance-matrix based LLS estimator is proposed in line-of-sight (LOS) and non-LOS (NLOS) environments to further provide accuracy, taking advantage of the correlation of the observations. Different techniques for selecting the reference FT under non-LOS (NLOS) conditions are disclosed. A map-based two-stage LLS estimator assists in selecting the reference FT under NLOS conditions.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: July 10, 2012
    Assignee: NTT DoCoMo
    Inventors: Ismail Guvenc, Fujio Watanabe, Hiroshi Inamura
  • Publication number: 20120127015
    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: Application
    Filed: February 7, 2012
    Publication date: May 24, 2012
    Applicant: ROKE MANOR RESEARCH LIMITED
    Inventor: Robert J. Weedon
  • Patent number: 8164510
    Abstract: In an embodiment, a quantity smoother includes a first stage and a second stage. The first stage is operable to receive a sequence of raw samples of a quantity and to generate from the raw samples intermediate samples of the quantity, the intermediate samples having a reduced level of fluctuation relative to the sequence of raw samples. The second stage is coupled to the first stage and is operable to generate from the intermediate samples resulting samples of the quantity, the resulting samples having a reduced level of fluctuation relative to the sequence of intermediate samples. For example, such a quantity smoother may be part of a target-ranging system on board a fighter jet, and may smooth an error in an estimated target range so that the fighter pilot may more quickly and confidently determine in his head a range window within which the target lies.
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: April 24, 2012
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventor: Ronald M. Yannone
  • Patent number: 8159387
    Abstract: Systems and methods for obtaining target elevation information are disclosed. The systems and methods use multiple vertical transmitters and one or more receivers to infer changes in the elevation plane and the height of objects. Changes in elevation and heights of objects are inferred from path length differences between the transmitters and a particular backscattering point. Using known geometric information regarding the configuration of the transmitters, propagation time differences can be estimated via time delay estimation methods in either the time or frequency domain. Appropriate modulation schemes are used such that the multiple signals transmitted are separable upon reception.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: April 17, 2012
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Jose Fernandez, Richard Rikoski, John Stroud
  • Patent number: 8138918
    Abstract: An intrusion detection and tracking system includes a plurality of nodes, a DP and a gateway. The nodes are disposed about an area and form a wireless network to be monitored, the nodes are configured to receive data and transmit data frames with a signal strength indicator and/or a link quality indicator in the frames. The DP is communicatively connected to the network and configured to analyze variations in the signal strength indicator and/or link quality indicator to detect and track disturbances to an electromagnetic field in the area. The gateway is configured to form a data link between the network and the DP.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: March 20, 2012
    Assignee: Raytheon Company
    Inventors: Toni S. Habib, Wassim S. Habib
  • 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: 8134493
    Abstract: A system and method for determining the geolocation of a signal emitter moving at an unknown velocity by combining signal data of a target detection platform (e.g., a radar system) and signal data collected by two or more moving signal collection platforms (e.g., RF signal receivers). In one embodiment, the target detection platform determines tentative location and velocity of the signal emitter, and the signal collection platforms are configured to perform TDOA and/or FDOA analysis of the collected signal data corresponding to a signal of the signal emitter. In one embodiment, solutions provided from the TDOA and/or FDOA analysis are unbiased by using the tentative velocity of the signal emitter, and the geolocation of the signal emitter is determined by matching the TDOA/FDOA solutions and the detected tentative location.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: March 13, 2012
    Assignee: Raytheon Company
    Inventors: William B. Noble, Duncan L. Crawford, Jeffrey M. Guild