Automatic Range Tracking Patents (Class 342/95)
  • Patent number: 10474858
    Abstract: A variety of technologies having practical application in retail stores are detailed. One is an improved method of identifying items selected by customers. This method includes receiving sensor data from plural sensors, including (a) ceiling-mounted cameras that monitor tracks of customers through aisles of the store, and (b) inventory sensors that are positioned to monitor removal of stock from store shelves. This received sensor data is employed in evaluating plural alternate item identification hypotheses. These hypotheses include a first hypothesis that a customer selected an item having a first identity, and a second hypothesis that the customer selected an item having a second identity. A confidence score is associated with each of the first and second item selection hypotheses. These confidence scores are refined as sensor data is received, e.g., increasing a confidence score of one hypothesis, and reducing a confidence score of another.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: November 12, 2019
    Assignee: Digimarc Corporation
    Inventors: Bruce L. Davis, Tony F. Rodriguez, Geoffrey B. Rhoads, Eric D. Evans, Rebecca L. Gerlach
  • Patent number: 10467263
    Abstract: A system that displays geographic data is disclosed. The system obtains polygons that define a set of geographic regions. Then, the system projects rays from endpoints of the line segments that define the polygons onto a reference line to form intersection points. For each interval between pairs of consecutive intersection points on the reference line, the system keeps track of open line segments that project onto the interval. For each data point in a set of data points, the system identifies a relevant interval on the reference line that the data point projects onto, and performs a crossing number operation to identify polygons that the data point falls into, and the system increments a count for each polygon that the data point falls into. Finally, the system displays the set of geographic regions in a manner that indicates a number of data points that fall into each geographic region.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: November 5, 2019
    Assignee: SPLUNK INC.
    Inventor: Geoffrey R. Hendrey
  • Patent number: 9990736
    Abstract: Velocity controllers in accordance with embodiments of the invention enable velocity estimation for tracked objects. One embodiment includes a tracker controller, including: a processor; and a memory containing: a velocity tracker application; a state space describing relationships between measured locations, calculated locations, and changes in locations, where the calculated locations in the state space correspond to unoccluded points on the surface of the tracked object; wherein the processor is configured by the velocity tracker application to: pre-process the state space to identify a tracked object; estimate a velocity of the tracked object using a location history calculated from the measured locations of the tracked object within the state space and a motion model calculated from the state space; and return the velocity of the tracked object.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: June 5, 2018
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: David Held, Jesse Levinson, Sebastian Thrun, Silvio Savarese
  • Patent number: 9971011
    Abstract: A system and method for tracking an object receive electronic intelligence (ELINT) track information related to the object and radar track information. A first likelihood that the radar track information is also related to the object is determined at a first time of the ELINT track information and a first time of the radar track information. A second likelihood that the radar track information is also related to the object is determined at a second time of the ELINT track information and a second time of the radar track information. The first likelihood and the second likelihood are processed to determine whether the ELINT track information and the radar track information should be associated as both being related to the object.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: May 15, 2018
    Assignee: Raytheon Company
    Inventors: Loretta A. Testa, Samuel S. Blackman, Ray B. Huffaker, Catherine Durand, Kristine Hacobian
  • Patent number: 9817111
    Abstract: Disclosed here are system, apparatus, article of manufacture, method and/or computer program product embodiments for track association. An embodiment operates by receiving a first set of track identification data from a first tracking system. The first set of track identification data is associated with a global track identifier (GID). The first set of track identification data associated with the GID is broadcasted to the first tracking system and a second tracking system. A second set of track identification data is received from the second tracking system. The second set of track identification data identifies any tracks of the second tracking system that match the first set of track identification data. The GID is associated with the second set of track identification data.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: November 14, 2017
    Assignee: The MITRE Corporation
    Inventors: Craig Garrett, Justin Gray
  • Patent number: 9684063
    Abstract: A system provides high-throughput radar signal processing without resorting to costly parallel processing tool kits. The system breaks the signal processing chain into a series of independent data processing units (DPUs) that execute independently and in parallel. Queuing theory is used to efficiently distribute processing across multiple processor cores and/or computers. The system scales to an arbitrary number of cores/computers. The independent nature of the DPUs readily allows addition/replacement of new filters into the system.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: June 20, 2017
    Assignee: RAYTHEON CANADA LIMITED
    Inventor: Anton Neumayer
  • Patent number: 9594160
    Abstract: Disclosed herein are system, apparatus, article of manufacture, method and/or computer program product embodiments for track association. An embodiment operates by receiving a first set of track identification data from a first tracking system. The first set of track identification data is associated with a global track identifier (GID). The first set of track identification data associated with the GID is broadcasted to the first tracking system and a second tracking system. A second set of track identification data is received from the second tracking system. The second set of track identification data identifies any tracks of the second tracking system that match the first set of track identification data. The GID is associated with the second set of track identification data.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: March 14, 2017
    Assignee: The MITRE Corporation
    Inventors: Craig Garrett, Justin Gray
  • Patent number: 9297886
    Abstract: A method for suppressing clutter when detecting objects of interest in a radar system is provided. The method includes defining a plurality of scatterer classes corresponding to a plurality of predetermined scatterer motion types, at least one of the classes corresponding to ballistic acceleration, and at least one of the classes corresponding to non-ballistic acceleration. A plurality of sensor pulses are transmitted, and reflected return pulses are received. Scatterers identified in the radar return signal are associated with one of the scatterer classes. A set of complex weights is generated and applied to the radar return signal data to null scatterers associated with the class corresponding to ballistic acceleration.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: March 29, 2016
    Assignee: Lockheed Martin Corporation
    Inventors: Paul D. Mountcastle, Mark A. Friesel
  • Patent number: 9285456
    Abstract: The invention relates to a system and a method for locating at least one target (X) using an array of transceivers or sensors (S), in which at least a portion has a known geographic location, each comprising data processing means (S1) implementing at least one algorithm (AA, AS, AR, AF) for locating a target, means (S2) for transmitting/receiving a signal that decreases with the distance, the sensor array (S) covering at least one geographic area or area (Z), characterized in that they implement for each instant (t) an exchange of data or similarity data (DS) between the sensors (S) and a leading sensor (SL), and a distribution determination (DP) of the probability of the location of the target (X) using at least one regression algorithm (AR) on the basis of the similarity data (DS).
    Type: Grant
    Filed: April 19, 2010
    Date of Patent: March 15, 2016
    Assignee: UNIVERSITE DE TECHNOLOGIE DE TROYES
    Inventors: Hichem Snoussi, Cédric Richard, Paul Honeine
  • Patent number: 9207314
    Abstract: A state estimation system utilizing an Interacting Multiple Model (IMM) architecture and algorithms that can transition between different regimes of operation described by multiple models. Each individual model includes states, whose dynamics can be modeled, as well as extrinsic parameters, such as inputs to the system and sensor biases, whose dynamics cannot be modeled, but which are constrained to lie within a known range of values.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: December 8, 2015
    Assignee: Lockheed Martin Corporation
    Inventors: Purusottam Mookerjee, Frank J. Reifler
  • Patent number: 9140783
    Abstract: In a radar device, a wide band filter unit suppresses unnecessary components contained in a reception signal subjected to frequency conversion by a frequency conversion unit. The wide band filter unit has frequency characteristics for performing filtering so that isolation between transmitting and receiving becomes a desired level or lower. Although the wide band filter unit has an increased noise power compared to a matched filter, the wide band filter performs the filtering so as not to round a pulse waveform.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: September 22, 2015
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Kentaro Isoda
  • Patent number: 9041593
    Abstract: According to one embodiment, a target tracking apparatus acquires a first determination result by determining which combination of N-dimensional tracks is for the real target, acquires a second determination result by determining which combination of N-dimensional angular observation values is for the real target, selects the first determination result when an observation environment is an environment other than a dense environment, selects the second determination result when the observation environment is a dense environment, and calculates distance information to thereby generate an (N+1)-dimensional track for each target.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: May 26, 2015
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventor: Hidetoshi Furukawa
  • Patent number: 9041588
    Abstract: Disclosed is an object detection device capable of improving object detection accuracy by preventing erroneous combination detection. In this device, a detection object region correction unit (103) corrects a detection object region set by a detection object region set unit (102) on the basis of moving speed map information associated with a coordinate group in a reference image plane and the detected moving speed on each coordinate, which is detected by a radar. Thus, the detection object region can be amended by the use of the moving speed map information even when the detection object region is obtained as a result of erroneous combination. As a result, the object detection accuracy can be improved.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: May 26, 2015
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Makoto Yasugi, Hirofumi Nishimura
  • Patent number: 9035819
    Abstract: The architecture includes a passive radar using opportunistic transmitters and a plurality of active radars that cooperate in the form of a coalition to assure the surveillance of an area of space. The passive radar and the active radars that form the architecture include means for exchanging information and the passive radar is configured to adopt two alternate operating modes: (i) a “watching” mode in which the passive radar carries out surveillance of the area of space concerned and generates detection information, and (ii) an “on-demand data feed” mode in which the passive radar executes at the request of one or more active radars an object search in a given sector of the area under surveillance or an analysis of certain characteristics of the signal received in a given sector.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: May 19, 2015
    Assignee: Thales
    Inventor: Sébastien Allam
  • Patent number: 8970429
    Abstract: Aspects of the present invention relate to a system (10) and a method for tracking one or more targets by a radar using a multiple hypothesis tracking (MHT) algorithm, the method including operating the radar to transmit a radar beam from a first location toward the one or more targets, operating the radar to receive a plurality of return signals at the first location from the one or more targets, and to generate a plurality of observations for a single radar dwell respectively corresponding to the plurality of return signals, and processing the plurality of observations in accordance with the MHT algorithm for at least two passes such that more than one of the plurality of observations are associated with a single track of the one or more targets.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: March 3, 2015
    Assignee: Raytheon Company
    Inventors: Catherine Pickle, Samuel S. Blackman, Douglas B. Tyler
  • Patent number: 8963765
    Abstract: A method for tracking an object using radar includes detecting a wideband radio frequency (“RF”) energy at a first radar sensor tracking the object and determining in a computer process if a booster is propelling the object based on the wideband RF energy. The object is tracked in a computer process based on a ballistic trajectory if the booster is not propelling the object, and the object is tracked in a computer process based on a non-ballistic trajectory if the booster is propelling the object.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: February 24, 2015
    Assignee: Lockheed Martin Corporation
    Inventor: Richard N. Pedersen
  • Patent number: 8963766
    Abstract: According to one embodiment, a target tracking apparatus calculates N-dimensional predicted values from a respective stored (N+1)-dimensional tracks for each of the targets, determines whether or not the N-dimensional predicted value for each of the targets is correlated with the received N-dimensional angle observed value for the target, if the N-dimensional predicted value is not correlated, generates a new (N+1)-dimensional track for the target based on the N-dimensional track corresponding to the N-dimensional angle observed value and if the N-dimensional predicted value is correlated, updates and stores the (N+1)-dimensional track using the N-dimensional angle observed value.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: February 24, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hidetoshi Furukawa
  • Patent number: 8930063
    Abstract: A vehicle system and method that can determine object sensor misalignment while a host vehicle is being driven, and can do so without requiring multiple sensors with overlapping fields-of-view. In an exemplary embodiment where the host vehicle is traveling in generally a straight line, the present method uses an object sensor to track the path of a stationary object as it moves through the sensor's field-of-view and compares the sensed object path to an expected object pat*h. If the sensed and expected paths of the stationary object deviate by more than some amount, then the method determines that the object sensor is skewed or otherwise misaligned.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: January 6, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Daniel Gandhi, Satish Rayarapu, Dmitriy Feldman
  • Patent number: 8912947
    Abstract: A method for searching a radar acquisition volume after rotating the radar acquisition volume is disclosed. The method may comprise identifying an acquisition face of the acquisition volume and partitioning the acquisition face so that each partitioned portion of the acquisition face can be searched within a predetermined time period. The partitioning step may comprise determining the maximum number of beams that can be searched in a predetermined period of time and iteratively repositioning an elevation line on the acquisition face to identify the highest elevation line for which the number of radar beams is less than or equal to the maximum number of beams. The partitioning step may also comprise defining a beam lattice for the acquisition face and determining a maximum elevation line based on the beam lattice. The area of the acquisition face bounded by the highest or maximum elevation line defines the partitioned portion.
    Type: Grant
    Filed: January 9, 2012
    Date of Patent: December 16, 2014
    Assignee: Lockheed Martin Corporation
    Inventors: Mark A. Friesel, Juma M. Thorpe
  • Patent number: 8912948
    Abstract: Methods are disclosed for obtaining a cued radar acquisition volume. The method employs uncertainties (i.e., errors) represented by a covariance, and a method of finding the minimum volume defined by range, azimuth, and elevation limits that enclose the covariance, and uses a perspective projection of the errors to provide an accurate calculation of the cued acquisition volume. The three-dimensional problem is first reduced to two dimensions by parallel projection onto the range-transverse and range-elevation planes. Then perspective projection of the two dimensional parallel projections is performed. The disclosed method reduces the complexity of three dimensional perspective projection by preceding perspective projection with parallel projection, which greatly simplifies the problem and allows a simple and easily calculated solution.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: December 16, 2014
    Assignee: Lockheed Martin Corporation
    Inventor: Mark A. Friesel
  • Patent number: 8860602
    Abstract: In cognitive radar information networks (CRINs) human-like cognitive abilities of attention and intelligence are built into radar systems and radar information networks (RINS) to assist operators with information overload. A CRIN comprises a plurality of radar sensing nodes monitoring an environment, a repository or memory, and a cognitive radar controller. Each radar sensing node includes a radio frequency transmitter, a transmitting antenna, and a receiver and receiving antenna. The receiver includes a digital radar processor for generating receiver information from the received echoes about the environment. The repository is configured for receiving and storing the receiver information generated by the digital radar processor.
    Type: Grant
    Filed: October 9, 2012
    Date of Patent: October 14, 2014
    Assignee: Accipiter Radar Technologies Inc.
    Inventors: Timothy J. Nohara, Simon Haykin
  • Patent number: 8836575
    Abstract: This disclosure provides a detection device, which includes an image data generation module for generating image data based on echo signals, and a target object detection module for determining an existence of a target object based on a level of the echo signal at each location of the image data for every azimuth. The target object detection module determines a continuity of the echo signals in a distance direction and an azimuth direction for every target object, and outputs an end location for each target object based on a determination result at each location, including a plurality of locations adjacent to a location determined as being a non-target object location.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: September 16, 2014
    Assignee: FURUNO Electric Company
    Inventor: Koji Nishiyama
  • Patent number: 8816895
    Abstract: Embodiments of a target classifier and method for target classification using measured target epsilons and target glint information are generally described herein. The target classifier is configured to compare a total epsilon measurement with target glint information to determine whether to the target being tracked corresponds to an intended target type. Based on the comparison, the target classifier may cause target tracking circuitry of a target-tracking radar to either continue tracking the target or break-off from tracking the target. Glint of different target types may be characterized at different ranges and the target's glint characteristics may be used to distinguish intended from non-intended targets. Accordingly, intended targets such as incoming artillery may be distinguished from non-intended targets such as aircraft to help prevent countermeasures from being launched against non-intended targets.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: August 26, 2014
    Assignee: Raytheon Company
    Inventors: Brett J. Young, Jason A. Johnson
  • Patent number: 8791852
    Abstract: A standoff range, sense-through-obstruction radar system is capable of detecting micro-Doppler, or life form signatures, and movements through obstructions at stand-off ranges and displaying the target information over a live video feed of the area under surveillance. The sense-through-obstruction radar system comprises an antenna assembly that includes a horn antenna and a reflector configured to reflect radio frequency (RF) energy to/from the horn antenna. An antenna pointing assembly supports the antenna assembly. The antenna pointing assembly is configured to move the antenna assembly to point the antenna assembly toward an obstruction. A sensor assembly is mounted to the antenna assembly so that the sensor assembly is aligned with the RF beam formed from the RF energy reflected from the reflector to the horn antenna. The sensor assembly is configured to detect the location of the obstruction and to provide information to assist pointing of the antenna assembly toward the obstruction.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: July 29, 2014
    Assignee: VAWD Applied Science and Technology Corporation
    Inventors: Vinh H. Adams, Robert Adams, Wesley H. Dwelly
  • Patent number: 8781790
    Abstract: A LIDAR optical remote sensing system and method analyzes the falling edge profile of a return LIDAR signal that may be indicative of an object or an aerosol cloud, which is generally more diffuse. Using the falling edge profile permits burnthrough to an object that may be obscured by the aerosol cloud. The profile is compared against at least one threshold that may correspond, in various embodiments, to a negative slope of the falling edge, an integrated power under the falling edge, or a range estimate error for varying transmitted power values, varying transmitted pulse lengths and/or varying receiver detector field of view values.
    Type: Grant
    Filed: November 5, 2008
    Date of Patent: July 15, 2014
    Assignee: Neptec Design Group Ltd.
    Inventors: Xiang Zhu, Stéphane Louis Gagnon
  • Patent number: 8681041
    Abstract: An angle-only tracking filter includes: a target angle discriminant unit configured to receive sensor signal outputs and form angle only observations of a target relative to an ownship; an ownship navigation filter configured to receive and filter ownship inertial navigation measurements; a model analyzer configured to receive and analyze the ownship inertial navigation measurements and select the order of target kinematics to be determined; and a target kinematics generator coupled to the angle discriminant unit, the navigation filter unit, and the model analyzation unit, including: a first-order filter unit configured to generate a target position from the target angle measurements and the ownship inertial navigation information; a second-order filter unit configured to generate a target velocity from the target angle measurements and the ownship inertial navigation information; and a third-order filter unit configured to generate a target acceleration from the target angle measurements and the ownship iner
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: March 25, 2014
    Assignee: Raytheon Company
    Inventors: Randall R. Rojas, James J. Hiroshige
  • Patent number: 8654005
    Abstract: Methods for resolving radar ambiguities using multiple hypothesis tracking are described. One such method includes (a) choosing a single waveform for each of a plurality of dwells of a first scan, wherein the single waveforms of consecutive scans are different, (b) generating the first scan using the single waveform for each of the dwells of the first scan, (c) receiving observation data as a result of the first scan, the observation data comprising measured positions of true targets and false targets, (d) generating, using multiple hypothesis tracking, position predictions for true targets and false targets, (e) comparing the predicted positions and measured positions, repeating (a)-(e) until a preselected process condition is met, and determining the true targets based on the results of the comparisons.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: February 18, 2014
    Assignee: Raytheon Company
    Inventors: Keian Christopher, Samuel S. Blackman, Robert A. Rosen, Robert J. Dempster
  • Publication number: 20140028489
    Abstract: According to one embodiment, a target tracking apparatus acquires a first determination result by determining which combination of N-dimensional tracks is for the real target, acquires a second determination result by determining which combination of N-dimensional angular observation values is for the real target, selects the first determination result when an observation environment is an environment other than a dense environment, selects the second determination result when the observation environment is a dense environment, and calculates distance information to thereby generate an (N+1)-dimensional track for each target.
    Type: Application
    Filed: September 13, 2012
    Publication date: January 30, 2014
    Inventor: Hidetoshi Furukawa
  • Patent number: 8638254
    Abstract: A signal processing device performs object detection processing in which peak signals each representing a differential frequency between a transmitted signal in which a frequency thereof changes in a predetermined cycle and a received signal are derived in a first period where the frequency of the transmitted signal rises and a second period where the frequency of the transmitted signal falls, and the peak signals in the first period are paired with the peak signals in the second period to detect object information related to the peak signals. A range setting unit sets a frequency range in each of the first period and the second period on the basis of a frequency of an integer multiple of the peak signal related to the object information which has been detected in previous object detection processing. A signal setting unit sets a peak signal as a specific peak signal in a case where the peak signal is within the frequency range in each of the first period and the second period.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: January 28, 2014
    Assignee: Fujitsu Ten Limited
    Inventors: Jun Itoh, Tokio Shinagawa, Daisuke Nakabayashi, Hiroyuki Ishimori
  • Patent number: 8604964
    Abstract: A system for determining the movement of a swaying structure, on which a receiver is fixedly mounted, is proposed, wherein at least three reference transmitters having known and fixed positions are provided and transmit the transmission signals received by the receiver at defined carrier frequencies. In addition, an evaluation unit is provided, which determines measured phase values from the received signals, taking into account the defined carrier frequency, wherein the distance from the reference transmitters and the changes in position of the receiver and therefore of the swaying structure can be calculated from said phase values.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: December 10, 2013
    Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
    Inventors: Andreas Eidloth, Norbert Franke
  • Patent number: 8581776
    Abstract: Provided is a radar system which calculates a track of a detected object and can determine whether or not the track is accurate. The radar system includes: a radar section for emitting an electromagnetic wave to an object and receiving a reflected wave reflected from the object to detect position information of the object; a track calculation section for calculating, periodically at a first cycle, a track along which the object moves, on the basis of the position information obtained from the radar section; a first speed calculation section for calculating a first speed at which the object moves, on the basis of pieces of the position information at two different time points having a time interval which is longer than the first cycle; and a track determination section for determining whether or not the track is accurate, on the basis of at least the first speed.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: November 12, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Jun Tsunekawa
  • Patent number: 8559491
    Abstract: A method for measuring certain parameters of the impulse response of a propagation channel involving emitters and reflectors that are fixed or mobile, and for detecting and determining the parameters regarding the position and kinematics of the emitters and reflectors, or for auto-locating the reception system implementing the invention, in a system comprising N sensors receiving signals from the emitters or from the reflection on the reflectors. The method determines an ambiguity function which couples the spatial analysis and the delay-distance/Doppler-kinematic analysis, and determines at least one sufficient statistic ?(l,m,K) corresponding to the correlation between the known signal s(kTe) corresponding to the complex envelope of the signal emitted and the output of a filter w(l,m) where l corresponds to a temporal assumption and m corresponds to a frequency assumption.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: October 15, 2013
    Assignee: Thales
    Inventors: Pascal Chevalier, François Delaveau, François Pipon
  • Patent number: 8427364
    Abstract: A method and radar system for estimating a radar search volume, includes acquiring covariance information relating to a cued direction, the covariance information having an ellipsoidal shape, projecting the ellipsoidal shape covariance information onto a range-traverse plane and onto the range-elevation plane to produce a covariance ellipse on the range-traverse and range-elevation planes; and determining the maximum extents in each of the range-transverse and range-elevation planes wherein the azimuth and elevation extents define the search volume.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: April 23, 2013
    Assignee: Lockheed Martin Corporation
    Inventor: Mark A. Friesel
  • Patent number: 8427363
    Abstract: In one aspect, a method includes tagging a track as a live track if a tagging statistic is greater than a tagging statistic threshold and tagging the track as a virtual track if the tagging statistic is less than the tagging statistic threshold. In another aspect, an article includes a machine-readable medium that stores executable instructions to determine whether a track is a live track or a virtual track. The instructions causing a machine to tag a track as a live track if a tagging statistic is greater than a tagging statistic threshold and tag the track as a virtual track if the tagging statistic is less than the tagging statistic threshold. In a further aspect, an apparatus includes circuitry to tag a track as a live track if a tagging statistic is greater than a tagging statistic threshold and tag the track as a virtual track if the tagging statistic is less than the tagging statistic threshold.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: April 23, 2013
    Assignee: Raytheon Company
    Inventors: Joel E. Lamendola, Maxim Raykin, Stanley J. Poreda
  • Patent number: 8423278
    Abstract: This disclosure provides a navigation aid device that includes a calculation time setting module for setting two or more calculation points of time for calculating trial information, a ship-concerned information acquisition module for acquiring ship-concerned information including a position of a ship concerned at every predetermined ship-concerned information acquisition time, a ship-concerned trial information calculating module for calculating ship-concerned trial information including the position of the ship concerned at each calculation point of time based on the ship-concerned information acquired at the newest information acquisition time with respect to the calculation point of time.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: April 16, 2013
    Assignee: Furuno Electric Company Limited
    Inventors: Motoji Kondo, Katsuyuki Yanagi, Takashi Inaoka
  • Patent number: 8416122
    Abstract: A command and control system for analyzing target track positional information by comparing target location to pregenerated geographic information.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: April 9, 2013
    Assignee: Lockheed Martin Corporation
    Inventor: Richard N. Pedersen
  • Patent number: 8378883
    Abstract: A device and method for correcting a position of at least one target point relative to a motor vehicle depending on a movement of the motor vehicle over a given number of cycles; starting from at least one target point, forming a first group with adjacent target points depending on a first given characteristic; verifying if the first group is homogeneous depending on a second given characteristic; and calculating a position of a formed group relative to the motor vehicle over the given number of cycles, a formed group corresponding to a target object.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: February 19, 2013
    Assignee: Valeo Vision
    Inventor: Siav Kuong Kuoch
  • Patent number: 8368585
    Abstract: This disclosure provides a navigation assisting device, which includes a TT information acquiring module for acquiring target object data by performing target tracking based on an echo received by a radar antenna, an AIS information acquiring module for acquiring target object data based on a Universal Shipborne Automatic Identification System, a maximum-number-of-output-data determination module for determining a maximum number of output data that is the number of target object data that is outputable while the radar antenna revolves once, a priority determination module for performing a priority determination according to a predetermined rule, for the target object data acquired by the TT information acquiring module and the target object data acquired by the AIS information acquiring module, and an output control module for outputting the target object data fewer than the maximum number of output data according to the priorities while the radar antenna revolves once.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: February 5, 2013
    Assignee: Furuno Electric Company Limited
    Inventors: Motoji Kondo, Yoshihito Hayashi, Takatsugu Kubo
  • Patent number: 8344937
    Abstract: Methods and apparatus for a first radar; identifying a blind spot in coverage of the first radar; providing a second radar to illuminate the blind spot, and merging data from the first and second radars using target classification prior to tracking to reduce false targets. In one embodiment, polarimetric data is used to classify targets.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: January 1, 2013
    Assignee: Raytheon Company
    Inventors: Peter R. Drake, Yuchoi F. Lok
  • Patent number: 8314733
    Abstract: A radar system tracks targets, and for each target determines the maximum acceleration of the target which can be tracked. The target acceleration is compared with the maximum acceleration that the radar can maintain in track, and if the decision is that the radar cannot maintain track, the radar data rate is increased, at least for that target. In at least some cases in which the target acceleration is such that the target can be maintained in track, the data rate for that target is decreased.
    Type: Grant
    Filed: October 13, 2009
    Date of Patent: November 20, 2012
    Assignee: Lockheed Martin Corporation
    Inventors: Kourken Malakian, Stephen J. Salvatore
  • Patent number: 8279106
    Abstract: A method for ground surveillance radar performance analysis is disclosed. A vector of point data items indexed by time offset, and comprising a point probability of detection is received. A plurality of initial azimuths of a simulated radar signal of the radar tower is determined based on the radar field-of-regard. A plurality of initial azimuth segment probabilities of detection are calculated for each of the initial azimuths respectively based on the vector of point data items and the initial azimuths, and a segment probability of detection is determined based on the initial azimuth segment probabilities of detection.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: October 2, 2012
    Assignee: The Boeing Company
    Inventors: Peter S. Wittenberg, Vicki Huo
  • Patent number: 8275493
    Abstract: A system and method are provided for launching and recovering an unmanned, water-born vehicle (UWBV) from a mother ship. The UWBV mimics the behavior of dolphins and is positioned ahead of the ship in preparation for bow riding. The UWBV uses a guidance system to position and keep in the bow wave. A high-frequency (HF) sonar transceiver array aboard the ship computes and sends course corrections to maintain the UWBV within the bow wave. The frequency range of the HF array can be 100 kHz or higher due to the short distance between the ship and the UWBV. Accordingly, the HF array can have a small aperture allowing for accurate bearing resolution. Course corrections can be sent on a near-continuous basis such that changes in thrust and rudder angle can be minimized to allow for accurate control of the UWBV.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: September 25, 2012
    Inventor: Anthony A. Ruffa
  • Patent number: 8264400
    Abstract: Described are computer-based methods and apparatuses, including computer program products, for signature matching. In some examples, the method for signature matching includes receiving a first target profile associated with a first data signal, the first data signal associated with a first target object; receiving a second target profile associated with a second data signal, the second data signal associated with the first target object or a second target object; generating a comparison distance utilizing a comparison distance function and based on a comparison of one or more data points associated with the first target profile and one or more data points associated with the second target profile; and determining a signature matching score based on the comparison distance.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: September 11, 2012
    Assignee: Raytheon Company
    Inventors: Nadeeka D. Yapa, Rachel B. Norman
  • Patent number: 8253621
    Abstract: A radar volume in a cued direction is searched with sequential pencil beams. The cued direction is subject to uncertainty in the form of covariance. The covariance defines an ellipse rotated relative to the azimuth axis. Before determining the extent of the acquisition face, the ellipse is projected onto a viewplane normal to the radar range axis, and rotated so the principal axes are parallel with the traverse and elevation directions. The acquisition face is then found. The number of beams required to scan the search volume is determined. In one embodiment, the search volume is sent to the radar, and the radar rotates the beams to their correct positions. The beams are then scheduled.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: August 28, 2012
    Assignee: Lockheed Martin Corporation
    Inventor: Mark A. Friesel
  • Patent number: 8237606
    Abstract: A system includes a pulsed UHF radar for integrating the signal received over a given integration time. The integration time for the received signal and the size of the distance bin are defined in such a way that, taking into account the range of speeds of the targets of interest, a moving target of interest travels only a distance shorter than the size of the distance bin from one integration period to another. Furthermore, the UHF radar implements a method of forming radar blips from the received signal to form elementary blips from the signals received over the chosen integration time and to store them from one burst to another. The method also confirms that the elementary blips formed probably correspond to targets of interest and then forms, from the confirmed elementary blips, aggregate blips, the attributes of an aggregate blip depending on the attributes of the confirmed elementary blips from which the aggregate blip stems.
    Type: Grant
    Filed: December 10, 2010
    Date of Patent: August 7, 2012
    Assignee: Thales Deutschland GmbH
    Inventors: Paul Molin, Yves Ricci
  • Patent number: 8228228
    Abstract: An apparatus and method for receiving electromagnetic waves using photonics includes a transmission unit transmitting electromagnetic waves in intervals; a time delay unit coupled to the transmission unit and controlling the transmission unit to transmit the electromagnetic waves in the intervals; an antenna receiving the electromagnetic waves reflected from the target; an interferoceiver coupled to the antenna and receiving the electromagnetic waves from the antenna, the interferoceiver comprising an optical recirculation loop to produce replica electromagnetic waves; and a computer identifying the target from the reflected electromagnetic waves.
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: July 24, 2012
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Ming-Chiang Li, Weimin Zhou
  • Patent number: 8223065
    Abstract: A method according to an aspect of the disclosure is for partitioning a radar acquisition volume, the method comprising the steps of: determining an allocated time to search an unpartitioned volume; determining a number of beam rows in an unpartitioned acquisition face; determining an average per-row search time for searching the angular region based on the determined allocated time and determined number of beam rows in an unpartitioned acquisition face; determining a number of beam rows in an allotted acquisition period that is searchable based on the average per-row search time; calculating a maximum elevation extent based on the number of beam rows in the allotted acquisition period; and searching an angular extent of the search volume based on the calculated maximum extent.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: July 17, 2012
    Assignee: Lockheed Martin Corporation
    Inventor: Mark Friesel
  • Patent number: 8200149
    Abstract: An apparatus and method for combining transponder bandwidths comprises a wide-band virtual transponder for transmitting a single data stream. The wide-band virtual transponder is comprised of a plurality of narrow-band physical transponders. A plurality of elementary streams are statistically multiplexed to create the single data stream, wherein the single data stream is forward error correction encoded and demultiplexed into a plurality of transponder streams for transmission by the plurality of physical transponders. The physical transponders each use a different portion of a signal spectrum, wherein the different portion may be guard bands or a combination of legacy bands and guard bands. Upon receipt, the transponder streams are multiplexed to recover the single data stream, wherein the recovered single data stream is forward error correction decoded and statistically demultiplexed to recover the plurality of elementary streams.
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: June 12, 2012
    Assignee: The DIRECTV Group, Inc.
    Inventor: Ernest C. Chen
  • Patent number: 8193968
    Abstract: Systems and methods for detecting objects and weather in space are disclosed. A system for detecting an object in space and space weather includes at least one spacecraft, at least one radiation source, at least one detector, and a controller. The at least one radiation source and the at least one detector are coupled to the at least one spacecraft. The at least one radiation source is configured to transmit a signal. The at least one detector is configured to detect the signal. The signal may be reflected from an object in space. The controller is coupled to the spacecraft and is in communication with the plurality of detectors. The controller is programmed to calculate either a relative position of the object based or a plasma parameter in a region traversed by the signal based on the detected signal.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: June 5, 2012
    Assignee: Exelis, Inc.
    Inventors: Omid Ebrahimi Kia, Christopher Rodgers, Brian Bradford
  • Patent number: 8184041
    Abstract: Radar beams for searching a volume are selected by determining the central angle and azimuth and elevation extents to define an acquisition face. The number of beams NMBA required to cover the acquisition face is determined by N MBA = ( 2 ? n + 1 ) ? ( m + 1 2 ) + ( - 1 ) n + m 2 ( 2 ) The number of beams NMBA is multiplied by the dwell per beam to determine the total search time, which is compared with a maximum time; (a) if the total search time is greater than the permissible time, the acquisition face is partitioned, and (b) if the total search time is less, the acquisition face information is applied to a radar processor for filling the unextended acquisition face with the number NMBA of beams in a particular pattern.
    Type: Grant
    Filed: October 7, 2008
    Date of Patent: May 22, 2012
    Assignee: Lockheed Martin Corporation
    Inventor: Mark A. Friesel