Digital Processing Patents (Class 342/195)
  • Patent number: 8314732
    Abstract: A method of classifying items from reflected signals returned from said items is disclosed, the method comprising: processing said return signals to discriminate between a first set of signals indicative of items of interest and a further set of signals indicative of clutter; identifying items from said first set of signals and classifying them as a first class of item; processing said further set of signals to identify a second set of signals indicative of further items of interest; identifying items from said second set of signals and classifying them as a second class of item.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: November 20, 2012
    Assignee: Cambridge Consultants Ltd.
    Inventors: Gordon Kenneth Andrew Oswald, Edwin Christopher Carter, Per Arne Vincent Utsi, Samuel Julius Pumphrey, Desmond Keith Phillips, Michael Hugh Burchett, Allan Geoffrey Smithson, Jonathan Peter Edgecombe
  • Patent number: 8310392
    Abstract: A radar device includes an antenna, from which a detection signal is transmitted while the antenna being rotated and by which a reflective wave of the transmitted detection signal is received to detect echo data, wherein image data is generated based on the detected echo data, a continuity detecting module for detecting a planar continuity of the currently detected echo data with respect to a pixel concerned in the image data, a behavior data generating module for generating behavior data indicative of a behavior of the echo data for a predetermined number of scans of the past in the pixel concerned based on behavior determination data, and an echo kind determining module for determining a kind of the echo data of the pixel concerned based on the planar continuity and the behavior data.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: November 13, 2012
    Assignee: Furuno Electric Company, Limited
    Inventors: Tatsuya Kojima, Takumi Fujikawa, Hidetoshi Kaida, Yu Morita, Toshiaki Takaki, Katsunori Okamatu
  • Patent number: 8305259
    Abstract: The radar includes a PCB having a top surface and a bottom surface, and a processor mounted on the bottom surface of the PCB. The radar includes a second liquid crystal polymer layer formed on the top surface of the printed circuit board, a second microstrip array printed on the second liquid crystal polymer layer, the second microstrip array having a patch, a first liquid crystal polymer layer formed on the second liquid crystal polymer layer, a first microstrip array printed on the first liquid crystal polymer layer, the first microstrip array having a perforated patch, an antenna positioned underneath the patch and connected to the second microstrip array, and a transmit/receive module connected to a bottom surface of the second liquid crystal polymer layer and configured to transmit a first frequency signal to the first microstrip array and a second frequency signal to the second microstrip array.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: November 6, 2012
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventor: Alexandros Margomenos
  • Patent number: 8305257
    Abstract: A method and apparatus of determining a wave height directional spectrum of an ocean wave field using the intermediate-frequency (IF) signal from marine radars with a rotating antenna, using either a fully coherent or a standard non-coherent transmitter/receiver modified for coherent-on-receive use. The method may include receiving the IF radar ocean surface echo signal for a series of transmit pulses, at a sequence of azimuthal antenna positions, and a number of antenna rotations covering several minutes, then generating a matrix of complex IF signal samples from these, deriving phases for each sample, generating the difference in phase for consecutive azimuths, then Doppler shifts, and finally radial velocities.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: November 6, 2012
    Inventor: Dennis B. Trizna
  • Patent number: 8305261
    Abstract: A method of adaptively removing mainlobe clutter from range-Doppler data includes estimating the peak of the mainlobe clutter, and determining clutter regionboundaries adaptively and robustly. The mainlobe clutter peak may be estimated from the range-Doppler data, for example using both nonlinear and linear filters. Alternatively the mainlobe clutter peak may be estimated from knowledge of the position and speed of the vehicle, such as a missile, upon which the radar system moves. The clutter boundaries may be determined at each of the range bins by stepping along Doppler bins from the mainlobe clutter peak estimate in opposite directions, locating the boundary at locations off of the mainlobe clutter peak estimate that meet a given criterion. The method produces a finer determination of the mainlobe clutter region, resulting in less of the range-Doppler data being excluded as part of the mainlobe clutter region.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: November 6, 2012
    Assignee: Raytheon Company
    Inventor: Kyle P. Hunter
  • Patent number: 8305255
    Abstract: The radar includes a PCB having a top surface and a bottom surface, and a processor mounted on the bottom surface of the PCB. The radar includes a second liquid crystal polymer layer formed on the top surface of the printed circuit board, a second microstrip array printed on the second liquid crystal polymer layer, the second microstrip array having a patch, a first liquid crystal polymer layer formed on the second liquid crystal polymer layer, a first microstrip array printed on the first liquid crystal polymer layer, the first microstrip array having a perforated patch, an antenna positioned underneath the patch and connected to the second microstrip array, and a transmit/receive module connected to a bottom surface of the second liquid crystal polymer layer and configured to transmit a first frequency signal to the first microstrip array and a second frequency signal to the second microstrip array.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: November 6, 2012
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventor: Alexandros Margomenos
  • Patent number: 8299955
    Abstract: The present invention relates to a method for cleaning signals for centralized antijamming. The invention makes it possible to provide as many cleaned antenna channels as sub-arrays with limited computational requirements. The method proceeds in two steps. Initially, an antijamming matrix is computed. This matrix depends on the noise covariance matrix, on a weighting vector representing the form of the desired antenna pattern on reception in an unjammed environment, and on constraints for preserving the shape of this antenna pattern. Subsequently, the signals arising from the antenna sub-arrays undergo a linear recombination effected by the antijamming matrix. The antijamming method is termed centralized since the data necessary for the antijamming processing are concentrated in the lone antijamming matrix. The invention applies notably to radar systems, notably to airborne radar systems.
    Type: Grant
    Filed: April 16, 2008
    Date of Patent: October 30, 2012
    Assignee: Thales
    Inventors: Amaury Fuss, Laurent Savy
  • Patent number: 8289201
    Abstract: A method and apparatus for detecting objects located underground. In one advantageous embodiment, a detection system detects objects having electrical non-linear characteristics located underground. The detection system comprises a transmitter unit, a receiver, and a processor. The transmitter transmits a plurality of pulsed radio frequency signals having a first frequency and a second frequency into a ground. The receiver monitors for a response radio frequency signal having a frequency equal to a difference between the first frequency and a second frequency, wherein the response radio frequency signal is generated by an object having the non-linear conductive characteristics in response to receiving the plurality of electromagnetic signals. The processor is connected to the transmitter unit and the receiver, wherein the processor controls an operation of the transmitter unit and the receiver, wherein the object is detected when the response radio frequency signal is detected by the receiver.
    Type: Grant
    Filed: June 6, 2007
    Date of Patent: October 16, 2012
    Assignee: The Boeing Company
    Inventors: Sandor Holly, Nicholas Koumvakalis, Robert Alan Smith
  • Patent number: 8288696
    Abstract: A method for engaging a target missile includes sensing the position of the target and of an interceptor missile, and determining time-to-go to intercept and direction of thrust of the interceptor. A one-step intercept solution is determined based on position estimates of the target and the interceptor and is used to iteratively estimate at least two components of a three-dimensional unit thrust vector, and apply updated guidance commands to the interceptor. A system for thrust vector control of an interceptor against a target missile includes a processor for receiving sensed target signals, determining a one-step initial solution to produce time-to-go and current direction of thrust of the interceptor, iteratively estimating at least two components of a three-dimensional unit thrust vector, and producing a guidance vector for application to the interceptor.
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: October 16, 2012
    Assignee: Lockheed Martin Corporation
    Inventors: Jeffrey B. Boka, Purusottam Mookerjee, Naresh R. Patel
  • Patent number: 8289202
    Abstract: A method, system, and computer program product for storing weather radar return data into a three-dimensional buffer. The system located on an aircraft includes a radar system that transmits a radar signal and generates a radar measurement as a result of radar return of the transmitted radar signal. A three-dimensional buffer includes a plurality of storage locations. A processor generates or updates a reflectivity value in storage locations in the three-dimensional buffer based on the generated radar measurement, a previously stored reflectivity value for the storage location, and uncertainty parameters. The uncertainty parameters of normalized radar cross section for ground elements are initialized based on a type of ground associated with each of the elements. The uncertainty parameters for weather reflectivity are initialized based on a priori information. The generated reflectivity values are stored in the three-dimensional buffer according to the storage locations.
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: October 16, 2012
    Assignee: Honeywell International Inc.
    Inventor: Paul Christianson
  • Publication number: 20120256778
    Abstract: Short-range vehicular radar systems are described. In one implementation, an apparatus used in radar applications includes a programmable digital receiver having an adaptable interference filter that is configured to reject radar pulses received from another radar system. In another implementation, a short-range vehicular radar system includes receive and transmission antennae, a programmable delay generator, and programmable receiver. The programmable delay generator is configured to control transmission of pulses from the transmission antenna at randomly selected times to prevent ambiguities associated with target objects that are distances away from the transmission antenna that are greater than the speed of light times the pulse repetition rate divided by two. The programmable receiver is calibrated to sample signals received by the receive antenna relative to when the pulses are emitted from the transmission antenna.
    Type: Application
    Filed: July 2, 2003
    Publication date: October 11, 2012
    Applicant: M/A COM, Inc.
    Inventors: Bruce David Labitt, Michael John Paradie, Matthew Douglas Marple
  • Patent number: 8279111
    Abstract: A high-precision distance measuring with a reduced error in a distance measuring system which calculates a distance from an arrival time of each pulse signal constituting a pulse sequence is provided. For an oscillator which generates pulse signals by counting the number of pulse signals constituting a received pulse sequence, a relative time difference between a transmitting device and a return device is acquired, a distance from the transmitting device to the return device is calculated, and the calculated distance is corrected based on the calculated relative time difference.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: October 2, 2012
    Assignee: National Institute of Information and Communications Technology
    Inventors: Bin Zhen, Huan-Bang Li, Ryuji Kohno
  • Patent number: 8279108
    Abstract: The general field of the invention is that of viewing systems of the synthetic vision type SVS, for a first aircraft, the said system comprising at least one cartographic database of a terrain, position sensors, for the said aircraft, an air traffic detection system calculating the position and the danger rating of at least one second aircraft exhibiting a risk of collision with the said first aircraft on the basis of data originating from sensors or systems such as TCAS or ADS-B, an electronic computer, a man-machine interface means and a display screen, the computer comprising means for processing the various items of information originating from the database, sensors and interface means, the said processing means arranged so as to provide the display screen with a synthetic image of the terrain comprising a representation of the said second aircraft.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: October 2, 2012
    Assignee: Thales
    Inventors: Christian Nouvel, Corinne Bacabara, Jean-Noel Perbet
  • Patent number: 8279113
    Abstract: A signal y is received by a radar, the signal y being the reflection of a signal s emitted by the radar, the signal s having been reflected by a target. A filter w is estimated and applied to the signal y, in which the filter w compensates for an unwanted and beforehand unknown distortion d in the emitted signal s.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: October 2, 2012
    Assignee: Thales Nederland B.V.
    Inventors: Mayazzurra Ruggiano, Emiel Stolp
  • Patent number: 8279105
    Abstract: Embodiments of the invention relate to configuring a receiver. In some embodiments, when a receiver is executing a dwell, configuration settings for one or more next possible dwells to be executed by the receiver may be sent to the receiver. In this way, when the receiver completes execution of the current dwell, the receiver need not wait to receive configuration settings for the next dwell to be executed as they may be already loaded into the receiver.
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: October 2, 2012
    Assignee: Lockheed Martin Corporation
    Inventors: Scott Kunz, Walter S. Richter, Jerry L. Twoey, Barrett L. Snedaker, Shawn Halferty, Douglas N. McMartin, Stephen A. Orzechowski
  • Patent number: 8274428
    Abstract: A method for estimating a radar cross-section (RES) of a given object by using a diffraction model of this object. With the model, it is possible to determine a basis adapted to said object on which is projected a vector of measurement. With the projected vector, it is possible to obtain a more complete reconstructed vector than the measurement vector in terms of incident wave and diffracted wave observation directions/polarizations and the components of which have a better signal/noise ratio than the measurements. The reconstructed vector is then used for calculating the RCS.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: September 25, 2012
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Olivier Vacus, Sylvain Morvan
  • Patent number: 8274427
    Abstract: A radar device including: a reception antenna that receives radio waves, includes at least three antennas and is arranged so that the phase center points thereof form an isosceles triangle; an arrival direction detection unit that detects an arrival direction of the radio waves by a phase monopulse method; and a phase correction unit that corrects a phase difference between phases of radio waves respectively received by two adjacent antennas among the three antennas based on the relationship of the phases of the radio waves respectively received by the three antennas.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: September 25, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Yoshiaki Minami
  • Patent number: 8259007
    Abstract: A partitioning system includes a decomposer module, a supply and cell commonality computation module, a network structure setup module, a seed selection module, an optimization setup module, a solver module, and a boundary creation module. A network structure is created by connecting each cell to each of its neighboring cells using bi-directional arcs. Each bi-directional arc is assigned a flow value and a cell commonality metric. The optimization program is solved to determine the flow value for each bi-directional arc and to determine a plurality of open seeds. Each determined seed represents one partition. Partition boundaries are created by grouping cells when they are connected to each other via one of the updated set of bi-directional arcs into cell clusters. Cells within cell clusters are merged to create the predetermined number of contiguous partitions.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: September 4, 2012
    Assignee: Metron Aviation, Inc.
    Inventor: Arash Yousefi
  • Patent number: 8259006
    Abstract: A method for interleaved pulsed-Doppler processing. Radar energy management and associated processing techniques take advantage of spatial degrees of freedom available on modern, short range, wide angle, volume search ESA radar systems. The method creates an advantage in Doppler resolution when compared to currently utilized Doppler processing techniques. An Electronically Scanned Array (ESA) radar system includes one or more processors that may be programmed to read and execute instructional commands including transmit a plurality of synchronized, coherent pulsed transmit beams having substantially repeatable gain and phase pattern characteristics; electronically steer the plurality of transmit beams in a respective, sequential plurality of spatially diverse directions in a temporally-interleaved manner; sequentially collect a respective plurality of receive beams in a respective plurality of time vs.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: September 4, 2012
    Assignee: SRC Inc.
    Inventor: Daniel R. Culkin
  • Patent number: 8259002
    Abstract: Systems and methods for radar altimeter antenna performance monitoring via reflected power measurements are provided. In one embodiment, a single antenna radar altimeter comprises: an antenna; a circulator coupled to the antenna; a transmitter coupled to the circulator; a receiver coupled to the circulator; wherein the circulator provides coupling of the transmitter and the receiver to the antenna while providing isolation between the transmitter and the receiver; a reflected power monitor positioned between the circulator and receiver; and a processor coupled to the reflected power monitor via a first analog-to-digital converter, the processor configured to compute and track reflected power measurement statistics from data generated by the reflected power monitor and provide a performance output indicating when one or more of the reflected power measurement statistics exceed a predetermined deviation threshold.
    Type: Grant
    Filed: December 10, 2010
    Date of Patent: September 4, 2012
    Assignee: Honeywell International Inc.
    Inventors: David C. Vacanti, Anthony H. Luk
  • Patent number: 8258999
    Abstract: A method for onboard determination of a roll angle of a projectile.
    Type: Grant
    Filed: November 22, 2009
    Date of Patent: September 4, 2012
    Assignee: Omnitek Partners LLC
    Inventors: Jahangir S. Rastegar, Carlos M. Pereira
  • Patent number: 8253619
    Abstract: In one aspect, the present invention provides an imager, preferably portable, that includes a source of electromagnetic radiation capable of generating radiation with one or more frequencies in a range of about 1 GHz to about 2000 GHz. An optical system that is optically coupled to the source focuses radiation received therefrom onto an object plane, and directs at least a portion of the focused radiation propagating back from the object plane onto an image plane. The imager further includes a scan mechanism coupled to the optical system for controlling thereof so as to move the focused radiation over the object plane. A detector optically coupled to the lens at the image plane detects at least a portion of the radiation propagating back from a plurality of scanned locations in the object plane, thereby generating a detection signal. A processor that is in communication with the detector generates an image of at least a portion of the object plane based on the detection signal.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: August 28, 2012
    Assignee: Techtronic Power Tools Technology Limited
    Inventors: David S. Holbrook, Christopher P. Adams, Brent Gregorich, Umesh Rajani, Jason Porter Whitmire, Scott D. Bublitz, Jeffrey C. Hessenberger, John S. Scott, Mark Huggins, Matthew J. Mergener
  • Patent number: 8242952
    Abstract: Presented is a system and method for eliminating spurious data in radar cross section (RCS) data. The system and method receives RCS data, and determines an expected number of scattering centers for an object of interest in said RCS data. The RCS data is processed to remove a plurality of frequency components in said RCS data based at least in part upon said expected number of scattering centers, and the RCS data is reconstructed without said plurality of frequency components to produce a reconstructed RCS data for the object of interest. In an embodiment, the TLS-Prony transform is used to transform the RCS data into a set of damped frequency components and coefficients, which are then constrained to the expected number of scattering centers in the known object using a TLS-Prong linear prediction order, and the order of the frequency components is varied until the order yields a least-error approximation.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: August 14, 2012
    Assignee: The Boeing Company
    Inventor: Samuel Allan Barr
  • Patent number: 8242948
    Abstract: Methods and systems for generating a raster file in a raster file format for use in a Digital Radar Landmass Simulator (DRLMS). A file in the raster file format defines synthetic aperture radar (SAR) scenery for use in generating a runtime database. The raster file contains a plurality of texture elements (texels) that define the SAR scenery. Each texel may have a material identifier, which identifies a material composition of a respective surface region of the SAR scenery; a surface height identifier, which identifies a surface height with respect to a bare earth elevation (BEE) value of the respective surface region; and a BEE identifier, which identifies a BEE of the respective surface region. A method for determining surface height identifiers based on digital surface model (DSM) elevation data is also provided.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: August 14, 2012
    Assignee: Lockheed Martin Corporation
    Inventors: John Burky, Sharon Shahan
  • 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: 8232909
    Abstract: A motion detector system includes the ability to detect motion through the use of a Doppler radar sensor or a combination of PIR sensors and a Doppler radar sensor. The system includes an outdoor light fixture having one or more lamps and a housing coupled to the outdoor light fixture. The housing includes a Doppler radar sensor and a microprocessor for analyzing the signals received by the Doppler radar sensor. Alternatively, the housing includes a combination of PIR sensors and a Doppler radar sensor and a microprocessor for analyzing the signals received from these sensors. The lamps in the light fixture are activated when either the PIR sensor or the Doppler radar sensor generates a signal indicating motion within the monitored area. Alternatively, the lamps can be activated when either the PIR sensor or the Doppler radar sensor senses predetermined number of motion activities over a limited time period.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: July 31, 2012
    Assignee: Cooper Technologies Company
    Inventors: Scott Kroeger, George Michael Drake, Ryan Crist, Tyler Fleig, Milton Dallas, Norm Siegel, Charlie Ketelhohn
  • Patent number: 8232914
    Abstract: A distance measuring apparatus comprising a transmission antenna to radiate a transmission radio wave; a reception antenna to receive a reflected signal from a target; an analog-to-digital converter to perform an analog-to-digital conversion for converting a reception signal; and a signal processing unit to process the converted signal and to detect the target, in which a transmission frequency of the transmission radio wave to be radiated is switched at a timing synchronized with a sampling frequency of the analog-to-digital conversion, the transmission frequency is switched in accordance with an arbitrary pattern within a frequency band, and the reception signal is rearranged in order on the basis of the arbitrary pattern at a time of the transmission to then be subject to a radar signal processing.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: July 31, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Kuroda, Kazuo Matsuura
  • Patent number: 8232915
    Abstract: A new spatially variant apodization (SVA) algorithm that uses a 3/4 filled aperture prior to two dimensional discrete Fourier transform (2-D DFT) to form the image. The algorithm can be used, for example, to improve contrast and resolution on synthetic aperture radar (SAR) imagery, with a lower degree of oversampling (and thus, fewer pixels) than other algorithms require. This can translate into more efficient use of radar displays and processor memory. Additional efficiencies of memory and computing power may be realized when Automatic Target Recognition (ATR) algorithms operate on this imagery. Embodiments of this invention use convolution kernels at two different spacings, which are better tuned to the local phase relationships of mainlobe and sidelobes with a 3/4 filled aperture. As such, these embodiments suppress sidelobes without sacrificing resolution, at an aperture-filling ratio of 3/4, rather than 1/2, as is usually used.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: July 31, 2012
    Assignee: Raytheon Company
    Inventor: Timothy T. Peterson
  • Patent number: 8212717
    Abstract: A detection system and method. The inventive system includes an arrangement for receiving a frame of image data; an arrangement for performing a variance calculation with respect to at least one pixel in the frame of image data; and an arrangement for comparing the calculated variance with a predetermined threshold to provide output data. In the illustrative embodiment, the frame of image data includes a range/Doppler matrix of N down range samples and M cross range samples. In this embodiment, the arrangement for performing a variance calculation includes an arrangement for calculating a variance over an N×M window within the range/Doppler matrix. The arrangement for performing a variance calculation includes an arrangement for identifying a change in a standard deviation of a small, localized sampling of cells. In accordance with the invention, the arrangement for performing a variance calculation outputs a variance pixel map.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: July 3, 2012
    Assignee: Raytheon Company
    Inventors: Donald P. Bruyere, Ivan S. Ashcraft, John B. Treece
  • Patent number: 8212714
    Abstract: A yaw angle error of a motion measurement system carried on an aircraft for navigation is estimated from Doppler radar images captured using the aircraft. At least two radar pulses aimed at respectively different physical locations in a targeted area are transmitted from a radar antenna carried on the aircraft. At least two Doppler radar images that respectively correspond to the at least two transmitted radar pulses are produced. These images are used to produce an estimate of the yaw angle error.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: July 3, 2012
    Assignee: Sandia Corporation
    Inventors: Armin W. Doerry, Jay D. Jordan, Theodore J. Kim
  • Patent number: 8212713
    Abstract: An object detecting apparatus including: an object detecting device that causes electromagnetic waves to be reflected from an object and receives the reflected waves to detect the object while scanning a predetermined scan range; a rotating device that changes a direction of the object detecting device; an imaging device that captures images; a display device that displays an image captured by the imaging device; a setting device that sets the scan range of the object detecting device on the image displayed by the display device; and a control device that instructs the rotating device to rotate the object detecting device based on the set scan range, and instructs the object detecting device to scan the scan range.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: July 3, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yoshimitsu Aiga, Takeshi Sasajima, Takashi Asaba
  • Patent number: 8212718
    Abstract: A microwave/millimeter wave sensor apparatus including a planar radiation type oscillator substrate having an inner-layer GND interposed between a front surface side dielectric substrate and a rear surface side dielectric substrate and a pair of conductor patches in an axis-symmetric manner on the side of the front surface layer. A gate and drain of a microwave transistor are respectively connected to the conductor patches to supply power to the gate and the drain of the microwave transistor through a gate-side RF choke circuit and a drain-side RF choke circuit. An impedance line satisfying an oscillation condition is connected to a source and a transmit RF signal in an RF zone as a planar radiation type oscillator is transmitted and a receive RF signal as reflected waves is received from a measured object, thus obtaining an IF signal as the sensing information through homodyne mixing.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: July 3, 2012
    Assignee: National Institute of Information and Communications Technology
    Inventors: Hitoshi Utagawa, Toshiaki Matsui
  • Patent number: 8207887
    Abstract: A method and system for processing radar data from a movable platform comprising passing a radar signal through a low noise amplifier; down converting the signal to a lower frequency; filtering out harmonics; sampling using A/D converter at or above Nyquist frequency; determining a scene center; performing a two stage averaging scheme of the received signals with a variable window function based upon the velocity, acceleration of the platform and scene center; coherently averaging N pulses to create an average pulse; performing an inverse Fourier transform; compensating to the scene center by multiplying by a complex exponential based upon GPS and inertial navigational system; summing the average pulses using a low pass filter; repeating the determination of an average pulse for a time period that is less than the Nyquist sample time interval to generate second average pulses; and performing a 2D inverse Fourier transform to obtain SAR image.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: June 26, 2012
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Geoffrey Howard Goldman
  • Publication number: 20120154203
    Abstract: A plurality of mini radars that make the radar system conformable to a structure that it is attached or built into. A radar system includes a clock, a plurality of frequency modulated/continuous wave (FM/CW) radar units in signal communication with the clock and a processor in signal communication with the plurality of FM/CW radar units. Each of the plurality of FM/CW radar units includes a row of antenna elements.
    Type: Application
    Filed: January 21, 2011
    Publication date: June 21, 2012
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: David C. Vacanti, Marc Pos
  • Patent number: 8203480
    Abstract: A method of detecting weather on an aircraft uses a weather radar system. The method adapts the weather radar system in accordance with a time-of-year parameter, a time-of-day parameter, and/or a location parameter to remove ground clutter reflectivity. The method includes determining the particular parameter and automatically adjusting the weather radar system to display the weather in response to the parameter. The system can be implemented in hardware and/or software and can advantageously predict and identify weather and/or weather hazards more precisely.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: June 19, 2012
    Assignee: Rockwell Collins, Inc.
    Inventors: Daniel L. Woodell, Roy E. Robertson, Peter A. Olander, Jeffery A. Finley
  • Patent number: 8199046
    Abstract: An object detection system includes a first object detection unit that detects an object in an area near the system using a radar and an object determination section that determines whether the object in the area near the system is a subject of detection, using a result of detection by the first object detection unit. The object determination section treats the object as the subject of detection if (i) an intensity of a radio wave from the object that is currently received by the first object detection unit is equal to or higher than a first threshold value or if (ii) an intensity of a radio wave from the object that was received in the past by the first object detection unit was equal to or higher than the first threshold value and the intensity of the radio wave from the object that is currently received by the first object detection unit is equal to or higher than a second threshold value that is lower than the first threshold value.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: June 12, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Takeshi Nanami
  • Patent number: 8193971
    Abstract: A method and a system for calibrating at least one antenna (1,1-1,3. 1,j). At least a first antenna (1,4) within a first antenna array (102) can be selected as a primary reference antenna. At least one antenna (4,3) that is not within the first antenna array can be selected as a secondary reference antenna. At least a first signal propagation characteristic (122) can be measured based on at least one signal wirelessly communicated between the primary reference antenna and the secondary reference antenna. At least a second signal propagation characteristic (118) can be measured based on at least one signal wirelessly communicated between the secondary reference antenna and at least a second antenna (1,2) within the first antenna array. At least a first calibration coefficient can be determined for the second antenna.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: June 5, 2012
    Assignee: Motorola Mobility, Inc.
    Inventors: Frederick W. Vook, Nicholas E. Buris, Bruce D. Mueller
  • Publication number: 20120133549
    Abstract: An antenna architecture for hemispherically-scanning active electronically scanned arrays (AESA). The antenna architecture utilizes variable diameter disks of antenna elements configured in a conical implementation. The antenna elements are oriented such that the element boresight is normal to the surface of the conical structure. Beamforming takes place on each disk first, and them separately in combining the signals from each disk, thereby reducing complexity. The antenna optionally utilizes disks of antenna elements of the same diameter to form a cylindrical antenna, which when combined with a conical configuration create enhanced sectors while maintaining a hemispherical coverage capability. Further, use of two conical configurations can produce a fully spherical coverage capability.
    Type: Application
    Filed: November 29, 2010
    Publication date: May 31, 2012
    Applicant: SRC, Inc.
    Inventors: Daniel R. Culkin, Timothy David Graham
  • Patent number: 8188909
    Abstract: An observation signal processing apparatus transmits pulse signals as search signals per each search, generates observation values based on reflected signals against a target and delay modulation pulse signals, and performs coherent integration on the observation values to output an integration value. The apparatus includes a section for storing a coherent integration count, a section for transmitting pulse signals equivalent to the coherent integration count, a section for calculating a phase correction amount based on an estimated relative speed, and a section for performing phase-weighted coherent integration on the observation values based on the phase correction amount.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: May 29, 2012
    Assignee: Denso Corporation
    Inventors: Yasuyuki Miyake, Asahi Kondou, Gaku Takano
  • Patent number: 8188910
    Abstract: The invention relates to the general field of the detection, notably the radar detection, of mobile or fixed targets. It consists of a method making it possible mainly to qualify the blips supplied by the processing subsystem of the detection system before the latter are analyzed to generate tracks, each track being assumed to represent the trajectory of a moving object that has been detected. According to the invention, an analysis duration is considered, and all of the blips detected during this period are considered. These blips are divided up into subsets, each subset corresponding to the blips that, during the analysis duration, have been detected in one and the same analysis channel defined by an initial position and a speed vector. The subsets formed in this way are then grouped together, one and the same group combining the subsets comprising blips for which the combined assertion of a plurality of attributes is verified.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: May 29, 2012
    Assignee: Thales
    Inventors: Philippe Reuillon, Albert Groenenboom, Michel Moruzzis
  • 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
  • Patent number: 8179307
    Abstract: A signal processing method performs operations of coherent processing making it possible notably to purge the useful signal of the spurious signals (in particular the reference signal and its multiple reflections), to regenerate the transmission signal and to perform a coherent integration of the signal received by computing the cross-ambiguity between the signal received and the regenerated transmission signal. It also performs operations of non-coherent processing making it possible in particular to carry out extraction and Doppler distance purification operations making it possible to form blips and to eliminate the spurious blips present among the blips formed. The method applies notably to passive radars operating on non-cooperating opportunity transmissions, such as FM transmissions intended for the public.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: May 15, 2012
    Assignee: Thales
    Inventors: Emmanuel De Gramont, Guy Desodt, Sébastien Allam
  • Patent number: 8179299
    Abstract: A method, comprising: characterizing an electromagnetic radiation path based on at least a scattered electromagnetic radiation pattern resulting from propagation of electromagnetic radiation through the path; receiving a plurality of scattered portions of a modulated electromagnetic radiation at a plurality of receiver antennas; and processing, at a receiver, the plurality of scattered portions, in conjunction with the characterized electromagnetic radiation path, to determine a change in the electromagnetic radiation path over time. An apparatus comprises a transmitter which transmits modulated electromagnetic radiation along an electromagnetic radiation path subject to electromagnetic radiation scattering; a plurality of receiver antennas which receive scattered portions of modulated electromagnetic radiation; and a processor which analyzes respective scattered portions, to characterize the electromagnetic radiation path, and to determine a change in the scattered electromagnetic radiation path over time.
    Type: Grant
    Filed: April 25, 2011
    Date of Patent: May 15, 2012
    Inventor: James L. Geer
  • Patent number: 8179305
    Abstract: An enhanced impulse response measurement for a pulsed frequency modulation (FM) radar signal provides a more accurate measurement of the amplitude of a secondary response relative to the amplitude of a main response. The pulsed FM radar signal is sampled to produce a time-domain sample record. The sample record is windowed to produce a windowed sample record. The windowed sample record is transformed into a frequency-domain spectrum. The spectrum is multiplied with the complex conjugate of a frequency-domain estimate of a transmitted pulsed FM radar signal to produce a de-spreaded pulse. The de-spreaded pulse is transformed into the time domain to produce a measurement of the impulse response having a main response and a secondary response. The amplitude of the secondary response is corrected to eliminate errors caused by the windowing.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: May 15, 2012
    Assignee: Tektronix, Inc.
    Inventors: Shigetsune Torin, Thomas C. Hill, III
  • Patent number: 8179301
    Abstract: An image processor and an image processing method for a synthetic aperture radar searching for a target are provided. A high resolution processing unit performs high resolution processing up to an area equivalent to a small target or smaller to thereby acquire information held by the small target. Next, a maximum value filter processing unit develops the information of the small target acquired through the high resolution processing in one pixel of low resolution processing with a maximum value. Then, a display unit displays the minimum area of the low resolution processing as one pixel on a screen. Since the information originally held by the small target can be displayed without damaging it as described above, it is easily distinguishable from the background information, enabling to improve the detection capability as a radar.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: May 15, 2012
    Assignee: NEC Corporation
    Inventors: Shingo Matsuo, Hitoshi Nohmi
  • Patent number: 8174434
    Abstract: An apparatus and a method for determining a distance (r) to a target object (200) proposes transmitting electromagnetic waves in the form of a transmission signal (120a) by a transmitter (111a), receiving at least one part of said transmission signal (120a) reflected by a the target object (200) in the form of a reception signal (120c, 120d) by receiving device (111b) and evaluating the reception signal (120c, 120d) according a reference signal (1230b) which has a known phase difference with respect to the transmission signal (120a) and a frequency equal to the frequency thereof. The reference (120) and reception (120c, 120d) signal frequencies are reduced in a frequency divider (113) with the same predefined divider factor (x) while preserving the existing phase difference between the reference signal (120b) and the reception (120c, 120d) signal in such a way that a reduced frequency reception signal (120b?) and a reduced frequency reception signal (120d) are obtained.
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: May 8, 2012
    Assignee: Valeo Schalter und Sensoren GmbH
    Inventors: Frank Künzler, Udo Haberland, Robert Rehner, Jochen Weinzierl, Lorenz-Peter Schmidt
  • Patent number: 8174433
    Abstract: According to one embodiment, bias estimation and orbit determination include receiving measurements in real time. The measurements include radar measurements and radar array orientation measurements. The radar measurements are generated by a radar system and indicate the location of a target. The radar array orientation measurements are generated by a navigation system and indicate the orientation of a radar array of the radar system. A state variable set is used. The state variable set includes measurement variables and dynamic bias variables. For example, a state variable set may include orbit position, orbit velocity, radar orientation, and radar measurement variables, which in turn may include dynamic bias variables such as orientation bias variables and measurement bias variables. A measurement variable is associated with a measurement, and a dynamic bias variable is associated with bias of a measurement.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: May 8, 2012
    Assignee: Raytheon Company
    Inventor: Michael E. Hough
  • Patent number: 8170824
    Abstract: Various aspects of the present invention are shown and described, each of which has stand alone utility in a navigated medical environment. A receiver position calibration system and method facilitates calibration of a reference frame prior to each navigated procedure. A concept and application of confidence weights is introduced. Confidence weights can be applied to distance calculations to mitigate the effects of interference and increase the tolerance of the navigated medical system. Multi-path interference is minimized through the transmission of a signal having a pattern of unique frequencies and filtering of the distance calculations for each frequency to identify the ‘best’ distance in the presence of multi-path interference. A position determination method and system that transmits a signal having multiple frequency components permits positions to be identified with high resolution over a large area.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: May 1, 2012
    Inventors: James P. Jacobs, Mark Robert Schneider, Guohua Min
  • Patent number: 8170135
    Abstract: A method is provided for coordinating detection of emitted signals by a receiver with transmission of signals by a transmitter, wherein the receiver and the transmitter are located on the same platform. The receiver scans a surrounding environment to detect emitted signals in multiple frequency ranges while the transmitter transmits signals in a predetermined frequency range. The receiver may employ dwells which may be defined as receiver configurations. A dwell, when executed, may be used to detect signals in a certain frequency range. If a frequency range of the dwell conflicts with the frequency range of transmitter signals, which may result in interference of transmitter signals with detection of emitted signals, execution of the dwell may be delayed. If the frequency range of the dwell is such that transmitter signals do not interfere with execution of the dwell, the dwell can be executed.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: May 1, 2012
    Assignee: Lockheed Martin Corporation
    Inventors: Craig A. Hanna, Anthony J. Gounalis, Robert Haefner
  • Patent number: 8169356
    Abstract: A motion sensing method and apparatus includes a housing enclosing a microwave motion sensor including an antenna, and a security system. The antenna may be a patch antenna which includes microwave radiating elements for transmitting and receiving a microwave signal for sensing motion. A reflector is attached to the housing and positioned above the antenna for downward shaping of the microwave signal. The microwave radiating elements together with the reflector provide a radiation pattern where a main beam is transmitted in a direction orthogonal to a surface of the antenna and a sided lobe is transmitted downward in amplitude below the microwave motion sensor. An alarm circuit indicates when the microwave sensor detects motion in armed mode, and a masking circuit indicates when the microwave sensor detects motion in a mask zone when the security system is unarmed. A second sensor may be positioned beneath the microwave motion sensor.
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: May 1, 2012
    Assignee: Honeywell International Inc.
    Inventors: Xiaodong Wu, James N. Helland, Leslie K. Green