Digital Processing Patents (Class 342/195)
  • Patent number: 8519883
    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: July 30, 2012
    Date of Patent: August 27, 2013
    Assignee: Cooper Technologies Company
    Inventors: George Michael Drake, Ryan Crist, Tyler Fleig, Milton Dallas, Scott Kroeger, Norm Siegel, Charlie Ketelhohn
  • Patent number: 8508402
    Abstract: The invention relates to a system and method for detecting, locating and identifying objects located above ground or below ground in an area of interest, comprising an airborne vehicle which circumscribes the area of interest and which includes a built-in radar having an antenna with a respective transmitter and receiver, signal-processing means, data-storage means and graphical interface means. According to the invention, the area of interest has been pre-referenced and the radar is a heterodyne ground penetration radar (GPR). The signal transmitted by the antenna generates a beam that illuminates a strip of earth, consisting of a sinusoidal electromagnetic signal having a frequency that is varied in precise pre-determined progressive steps. This signal is mixed with the received (reflected) signal, thereby producing two sets of values corresponding to the phases of each frequency step or stage.
    Type: Grant
    Filed: January 2, 2009
    Date of Patent: August 13, 2013
    Assignee: Pontificia Universidad Catolica de Chile
    Inventors: Mario Manuel Duran Toro, Marcelo Walter Guarini Herrmann
  • Patent number: 8508403
    Abstract: A method and system for detecting the presence of subsurface objects within a medium is provided. In some embodiments, the imaging and detection system operates in a multistatic mode to collect radar return signals generated by an array of transceiver antenna pairs that is positioned across the surface and that travels down the surface. The imaging and detection system pre-processes the return signal to suppress certain undesirable effects. The imaging and detection system then generates synthetic aperture radar images from real aperture radar images generated from the pre-processed return signal. The imaging and detection system then post-processes the synthetic aperture radar images to improve detection of subsurface objects. The imaging and detection system identifies peaks in the energy levels of the post-processed image frame, which indicates the presence of a subsurface object.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: August 13, 2013
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: David W. Paglieroni, N. Reginald Beer
  • Patent number: 8497477
    Abstract: A system and technique for imaging a subject at a scene overcomes the weaknesses in the existing gain fluctuation techniques by switching the environmental temperature at the scene at a rate sufficiently fast enough to obtain subsequent samples in a time period where the gain has not fluctuated sufficiently to have a negative effect on detection sensitivity. This technique is utilized in conjunction with the method of subsequent subtraction of alternate samples which both reveals the reflectance of the scene and removes gain fluctuation.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: July 30, 2013
    Assignee: MVT Equity LLC
    Inventor: Thomas D. Williams
  • Patent number: 8493264
    Abstract: In the case where radar image data obtained from a radar device equipped in a flying body and optical image data of a district taken by the radar device are synthesized to produce a terrestrial object information judging image, the radar image data are approximated to a black and white panchromatic image character. The radar image data approximated to the black and white panchromatic character and the optical image data are aligned in position and then synthesized. As a suitable embodiment, in an approximation processing of the radar image data to the black and white panchromatic image character, histogram conversion processing is carried out in accordance with a histogram characteristic of the radar image data.
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: July 23, 2013
    Assignee: Pasco Corporation
    Inventor: Tadashi Sasakawa
  • Patent number: 8477063
    Abstract: A obstacle detection system comprises a transmission antenna operable to radiate a radio frequency (RF) signal and a transmitter operable to control transmission of the RF signal from the antenna. The obstacle detection system also comprises a receiver antenna operable to receive a reflection of the RF signal; and processing circuitry operable to analyze a plurality of characteristics of a radar cross section (RCS) of the received reflection to identify an obstacle and one or more physical attributes of the obstacle.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: July 2, 2013
    Assignee: Honeywell International Inc.
    Inventors: David W. Meyers, Long Bui, Yi-Chi Shih, Alan G. Cornett
  • Publication number: 20130162465
    Abstract: A radar device includes a signal generator that generates an intermittent signal having a prescribed signal width and signal interval, a transmission signal position adjuster that outputs a transmission signal while adjusting positions of the intermittent signal on the time axis, an RF transmitter that transmits the transmission signal, an RF receiver that receives a reception signal including reflection waves reflected from an object in a measurement subject space, an AD converter that converts the reception signal into a digital signal, and an object detector that detects the object based on the reception signal. The transmission signal position adjuster outputs a transmission signal in which positions of respective signal units of the intermittent signal on the time axis are adjusted in units of a time adjustment amount that is shorter than a sampling interval of the AD converter.
    Type: Application
    Filed: September 12, 2011
    Publication date: June 27, 2013
    Inventors: Hirohito Mukai, Takaaki Kishigami, Yoichi Nakagawa
  • Patent number: 8466834
    Abstract: A method of radar-imaging a scene in the far-field of a one-dimensional radar array, comprises providing an array of backscatter data D(fm, x?n) of the scene, these backscatter data being associated to a plurality of positions x?n, n=0 . . . N?1, N>1, that are regularly spaced along an axis of the radar array. The backscatter data for each radar array position x?n are sampled in frequency domain, at different frequencies fm, m=0 . . . M?1, M>1, defined by fm=fc?B/2+m??f, where fc represents the center frequency, B the bandwidth and ?f the frequency step of the sampling. A radar reflectivity image 1 (?m?, ?n?) is computed in a pseudo-polar coordinate system based upon the formula (2) with formula (3) where j represents the imaginary unit, formula (A) is the baseband frequency, FFT2D denotes the 2D Fast Fourier Transform operator, ?m?, m?=0 . . . M?1, and ?n?, n?=0 . . .
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: June 18, 2013
    Assignee: The European Union, Represented by the European Commission
    Inventor: Joaquim Fortuny-Guasch
  • Patent number: 8436766
    Abstract: Methods and systems are disclosed for radar pulse compression signal processing. Methods include generating a function that quantifies radar signal characteristics and using a processor to calculate time-domain derivatives of the function in the frequency domain. Methods also include generating a function that quantifies radar signal characteristics as a sum of sidelobe levels; and using a processor to control the sidelobe levels by obtaining gradients of the function in the spectral domain.
    Type: Grant
    Filed: November 5, 2010
    Date of Patent: May 7, 2013
    Assignee: Technology Service Corporation
    Inventor: Carroll J. Nunn
  • Patent number: 8432253
    Abstract: Active RFID technologies are used to tag assets and people within buildings or open areas, such as parking lots or military bases; and to identify, preferably within a few meters, the real-time location (RTL) of the tag, i.e. to create a real-time location system, known as an RTLS. A novel and complex algorithm is provided that combines signal strength computations with factors that incorporate physical realities, such as walls and floors, to determine a tag's real-time location more accurately.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: April 30, 2013
    Assignee: Al-Qemmah Letechnologia Al-Ma'Loumat Co. (SIMTIX)
    Inventors: Robert Ainsbury, Immad Adawiya, Khalid Omar
  • Patent number: 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: 8416120
    Abstract: Disclosed herein is a method of sensor network localization through reconstruction of a radiation pattern with a characteristic value of an antenna depending on orientation thereof. The method can minimize errors using an antenna characteristic value and a signal strength depending on the orientation. In addition, the method can minimize errors using an artificial neural network to characterize a distorted radiation pattern of an antenna and using it for the localization of a triangulation method. Furthermore, the method can increases the localization rate even in a passive localization method by characterizing an asymmetric antenna radiation pattern and constructing the antenna characteristic through an artificial neural network.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: April 9, 2013
    Assignee: Sungkyunkwan University Foundation for Corporate Collaboration
    Inventors: Jong Tae Kim, Chae Seok Lim
  • Patent number: 8416118
    Abstract: A method and system for detecting chaff is disclosed. The method includes receiving range profile data including a plurality of samples, determining an average power for a first group of samples of the range profile data and a second group of samples of the range profile data, comparing the average power for the first group of samples to a first threshold value and the average power for the second group of samples to a second threshold value, and identifying a chaff detection if an average power of at least one of the first and second groups of samples exceeds its respective threshold value. The system includes a computer readable medium and a processor in communication with the computer readable storage medium and configured to perform the receiving, determining, comparing and detecting steps.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: April 9, 2013
    Assignee: Lockheed Martin Corporation
    Inventor: Rao M. Nuthalapati
  • Patent number: 8415596
    Abstract: A method for determining a location of a flying target included identifying and measuring the target by at least two seeker systems disposed at a distance from one another. The position of the target relative to at least one of the two seeker systems is determined from measurement data derived therefrom. The position of the target is measured inconspicuously and without active radiation, in that the seeker systems are data-networked, passive target tracking systems for missiles, which autonomously track the target and align the missile with the target. The measurement data determined by the data-networked seeker systems are combined, and the location of the target is determined from the combined data.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: April 9, 2013
    Assignee: Diehl BGT Defence GmbH & Co. KG
    Inventors: Raimund Dold, Thomas Kuhn, Wilhelm Hinding
  • Patent number: 8410977
    Abstract: Systems and methods for representing a weather hazard without also including a large percentage of non-hazard area. An exemplary system includes a memory that stores radar reflectivity data in a three-dimensional buffer, a display device and a processor that is in data communication with the memory and the display device. The processor receives a two-dimensional shape based on a portion of the data stored in the three-dimensional buffer, then finds a center of the shape. Next the processor finds the furthest away point of the shape in a plurality of regions sharing the center as a common point and generates a polygon based on the furthest away points. The display device displays the generated polygon. The shape is associated with hazardous weather information determined from the radar reflectivity data stored in the three-dimensional buffer. The display device is an aircraft weather radar display.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: April 2, 2013
    Assignee: Honeywell International Inc.
    Inventors: Rodney A. Rowen, Brian P. Bunch
  • Patent number: 8410976
    Abstract: An object ranging system operates by transmitting pulses derived from a frequency-swept signal and determining the beat frequency of a combination of the frequency-swept signal and its reflection from an object. A second (or higher) order harmonic is derived from the combination signal. Accordingly, determination of the beat frequency, and hence object range, is significantly enhanced. The frequency sweep is such that frequency changes occur at a substantially higher rate at the beginning of each the pulse repetition interval than at the end. Accordingly, because the frequency changes are concentrated in the period of pulse transmission, even reflections 'from a close object, where the time delay between the source signal and the reflection is very short, will cause a high beat frequency.
    Type: Grant
    Filed: October 24, 2006
    Date of Patent: April 2, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Jerzy Wieslaw Szajnowski, Paul Ratliff, Wojciech Machowski
  • Patent number: 8406277
    Abstract: Radiolocalization receiver for a satellite radiolocalization system like GPs, Galileo or the like, including a staged correlation and accumulation unit, in which the correlation data is biased in order to be to always non-negative. Thanks to this feature, the accumulated data grow monotonically during the accumulation. Overflow rate of a first correlation stage (100, 150-153) is scaled down respect to the rate of the input data. Thus the higher correlation stages (200, 154-158) can be used in multiplex. The bit-flip rate in memories is very low, with an effective reduction of dynamic power consumption. The logic structure of the accumulator is also simplified by the invention, thus further savings in silicon space and power are possible.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: March 26, 2013
    Assignee: QUALCOMM Incorporated
    Inventor: Phil Young
  • Patent number: 8405540
    Abstract: A method detects a target in a sequence of radar images, wherein each image is partitioned into a grid of cells, and wherein each cell has a corresponding position in an image coordinate system associated with a location in a world coordinate system. For each most recent image in a sliding temporal window of images, intensities of each cell are determined, and the subset of the cells having highest intensities is stored as a set of current needles. A set of hypotheses, obtained by using a state transition model and corresponding maximum limits, is determined for the current set of needles and appended to a set of queues. The hypotheses for the previous sets of needles to the corresponding set of queues are updated, and a maximum likelihood in the set of queues are selected to detect the location of targets.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: March 26, 2013
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventor: Fatih M. Porikli
  • Patent number: 8400347
    Abstract: The invention relates to a monitoring device and method allowing surveillance of an aircraft in relation to aircraft and/or craft on an airport displacement zone. The invention is a system comprising a dedicated transmitter and receiver to receive the information regarding the location and displacement of the cooperative aircraft and to monitor the location of the said aircraft in relation to the cooperative aircraft. The monitoring application is based on the detection of conflict zones by inter-correlation of constraint surfaces of the airport zone. The invention applies to aircraft carrying communication moans for ADS-B networks for an airport zone monitoring application.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: March 19, 2013
    Assignee: Thales
    Inventors: Bernard Fabre, Nicolas Marty, Hugues Meunier
  • Patent number: 8400348
    Abstract: Apparatus and methods for an airborne biota monitoring and control system are disclosed. Radar and laser/optical sensors are used to detect insects, with detection zones being over water in some embodiments to reduce backscatter clutter. A pest control laser or small autonomous or radio controlled aircraft under automated or human control may be used to disable a targeted flying insect. One embodiment includes use of a head-mounted display for displaying insect targeting information superimposed on a real landscape view. Technologies such as adaptive lens, holographic optical elements, polarized radar and/or laser beams, light amplifiers and light guides, thin disk, spinning disk, or vertical cavity surface emitting lasers enhance performance of the apparatus or reduce cost of the apparatus. Also disclosed are methods of discrimination of insect types using spectral information and dynamic relative variation of spectral intensities at different wavelengths reflected from an insect in flight.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: March 19, 2013
    Assignee: Applied Information Movement and Management, Inc.
    Inventors: David Lehmann Guice, Augustus Hammond Green, Jr., William Vaden Dent, Jr.
  • Patent number: 8400346
    Abstract: A method comprises transmitting a radar signal into an target area, receiving reflected portions of the radar signal from the target area, and processing the reflected portions of the radar signal. The step of processing comprises windowing analog signals representative of the reflected portions of the radar signal, performing a fast Fourier transform on the windowed analog signals to produce an FFT result for each window, and obtaining the average of the FFT results from consecutive windows. In accordance with the method, a user receives indication from an indicator that a golf ball is present in the target area when the average of the FFT results corresponds to characteristics of the golf ball. The system comprises a radar transceiver, a processor for processing reflected portions of the radar signal, and an indicator indicating to the user a golf ball present in the target area.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: March 19, 2013
    Assignee: Glass Wind, LLC
    Inventors: Kevin M. Hubbard, Dennis P. Bevirt
  • Patent number: 8395541
    Abstract: A method of providing weather radar images to a flight crew of an aircraft includes obtaining raw volumetric radar data corresponding to at least one signal reflected off of a weather system. Based on the radar data, the weather system is computationally classified as being of a first type of a plurality of weather-system types. After classifying the weather system, the radar data is image processed, the image processing yielding an image representing the weather system and corresponding to the first weather-system type. The image is displayed on a display device.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: March 12, 2013
    Assignee: Honeywell International Inc.
    Inventors: Ratan Khatwa, Santosh Mathan
  • Patent number: 8391336
    Abstract: To generate a pulse for ranging, a kernel is convolved with a spreading sequence. The spreading sequence is parametrized by one or more ordered (length, sparsity) pairs, such that the first sparsity differs from the bit length of the kernel and/or a subsequent sparsity differs from the product of the immediately preceding length and the immediately preceding sparsity. Alternatively, a kernel is convolved with an ordered plurality of spreading sequences, all but the first of which may be non-binary. The pulse is launched towards a target. The reflection from the target is transformed to a received reflection, compressed by deconvolution of the spreading sequence, and post-processed to provide a range to the target and/or a direction of arrival from the target.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: March 5, 2013
    Assignee: A.P.M. Automation Solutions Ltd
    Inventor: Alex Chiskis
  • Publication number: 20130050011
    Abstract: Radar in accordance with some embodiments of the inventive concept may include a transmission part outputting a signal to a target object; a receiving part receiving a reflected signal corresponding to the output signal of the transmission part; and a signal processing part receiving the reflected signal from the receiving part to distinguish the target object. The signal processing part directly samples the reflected signal and compares any one of the directly sampled reflected signal and a signal that the directly sampled reflected signal is restored with restored reflected signal data to distinguish the target object.
    Type: Application
    Filed: August 13, 2012
    Publication date: February 28, 2013
    Applicant: Industry-Academic Cooperation Foundation, Yonsei University
    Inventor: Tae Wook KIM
  • Publication number: 20130050016
    Abstract: The present invention relates to a radar package for millimeter waves. A small-size, low-cost, light-weight, and high-precision radar sensor can be embodied by packaging an antenna, transceiver chips, and a digital signal processing chip into a radar-on chip through TSVs in order to reduce the size and integrate the antenna, the transceiver chips, and the digital signal processing chip into one package. Accordingly, a radar sensor for ultra-high precision, applicable to a radar for vehicles, an imaging system for weapon monitoring, and a radar for small-sized, light-weight, and precision measurement, all of which have a millimeter band, and to the autonomous traveling of a robot, can be embodied.
    Type: Application
    Filed: August 24, 2012
    Publication date: February 28, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Cheon Soo KIM, Hyun Kyu YU
  • 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: 8378879
    Abstract: An apparatus for sensing motion having a transmitter for transmitting a carrier signal; a frequency control connected to the transmitter for controlling the frequency of the carrier signal; a first receiver for receiving the reflected transmitted carrier signal; a second receiver for receiving the reflected transmitted carrier signal, the second receiver being placed out of phase by less than a wavelength of the carrier signal from the first receiver; means for subtracting the carrier signal received by the second receiver from the carrier signal received by the first receiver to produce an error signal; wherein when motion is sensed by the apparatus, the error signal moves from zero thereby causing a corrective signal to be generated and sent to the frequency control, the frequency control forcing the error signal to zero.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: February 19, 2013
    Assignee: The Johns Hopkins University
    Inventors: Douglas L. Lewis, Andrew E. Feldman, Christopher L. Eddins
  • Publication number: 20130038485
    Abstract: A series of samples derived by fixed-frequency sampling of a received signal are processed to detect (local) maximum-value and minimum-value samples. For each of the maximum-value samples, a corresponding reference value and a corresponding group of samples are derived. The reference value is set higher than that of a minimum-value sample which adjoins the maximum-value sample, and the corresponding group consists of successively adjacent samples including the maximum-value sample, each having a higher value than the reference value. The estimated time-axis position of a peak value of the received signal is obtained within the range of time-axis positions of the corresponding group.
    Type: Application
    Filed: June 29, 2012
    Publication date: February 14, 2013
    Inventor: Mitsuo NAKAMURA
  • Patent number: 8373590
    Abstract: The invention relates to a method of processing an image sensed by an image sensor on board an aircraft fitted with an obstacle-locator system, in which the position and the extent of a zone in the sensed image, referred to as the zone of interest, is determined as a function of obstacle location data delivered by the obstacle-locator system, after which at least one parameter for modifying the brightness of points/pixels in said zone of interest is determined to enable the contrast to be increased in said zone of interest, and as a function of said modification parameter, the brightness of at least a portion of the image is modified.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: February 12, 2013
    Assignee: Eurocopter
    Inventor: Richard Edgard Claude Piré
  • Patent number: 8368586
    Abstract: A system includes a multi-system approach to detecting concealed weapons and person borne improvised explosive devices (PBIED). A first and second radar system operate at different center frequencies to provide, respectively, isolation of a target of interest from clutter and fine detail information on the target, such as whether the target is a living person, whether a concealed object may be present, material composition of the object, and shape, size, and position of the target relative to the system. Circular polarized radar beam may be used to distinguish a suspect object from within a crowd of people. Radar image of the object may be overlaid on visual image of a person carrying the object. Radar tracking of the object is coordinated with visual tracking of the target provided by a camera system, with visual display and tracking of the target overlaid with the radar information.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: February 5, 2013
    Assignee: Tialinx, Inc.
    Inventors: Farrokh Mohamadi, Mikko Oijala, Mohsen Zolghadri, Paul Strauch
  • Patent number: 8362947
    Abstract: The invention provides a method for obtaining the object-plane field without a pure theoretical estimation or a direct experimental measurement of a point spread function (PSF) of an imaging system. Instead, at least two image-plane fields have to be recorded. It is essential that the resolutions of the system producing the images have to be quite different from each other. Although both PSFs of the system are unknown, the recording conditions have to be chosen so that the second PSF could be expressed via the first PSF. Two integral equations—(1) a convolution of the object-plane field with the first PSF and (2) a convolution of the object-plane field with the second PSF (expressed via the first PSF)—can be reduced to one functional equation in the Fourier space. The reverse Fourier transform of the solution of this equation is the object-plane field.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: January 29, 2013
    Inventor: Victor Gorelik
  • Patent number: 8362944
    Abstract: A radar system is disclosed for forming a scanning receive beam from signals received by a phased array having a plurality of sub arrays. An exemplary radar system includes a plurality of phase units each configured to receive a signal from one or more sub arrays. Each phase unit includes a waveform generator configured to generate an analog waveform having a frequency corresponding to a time-varying phase shift. Each waveform generator is arranged to digitally generate the analog waveform, and output a comparison of the received signal with the waveform, incorporating the time-varying phase shift. The system further includes a combining unit configured to combine the outputs from the plurality of phase units to form a scanning receive beam.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: January 29, 2013
    Assignee: Astrium Limited
    Inventor: David Charles Lancashire
  • Publication number: 20130021197
    Abstract: A system, method, and apparatus for radar pulse detection using a digital radar receiver are disclosed herein. In electronic warfare (EW), radars operate in an environment with highly dense electronic waveforms. As a result, the radars may receive thousands or millions of radar pulses every second. To detect and sort out radar pulses emitted from different radars is a challenging problem in electronic warfare. The present disclosure teaches a radar pulse detection system that utilizes digital channelization and joint-channel detection techniques to detect and separate radar pulses that are sent from different radar emitters. The main features of the present disclosure are: 1.) a digital channelization technique to separate radar pulses from their mixtures; 2.) a multi-channel detection technique to detect radar pulses; and 3.) an innovative technique to separate overlapped radar pulses.
    Type: Application
    Filed: July 21, 2011
    Publication date: January 24, 2013
    Inventor: Qin Jiang
  • Patent number: 8358233
    Abstract: A process is provided for analyzing a radar signal using CLEAN to identify an undetected target in sidelobes of a detected target. The process includes obtaining system impulse response data of a waveform for a point target having a signal data vector based on a convolution under conjugate transpose multiplied by a target amplitude vector plus a noise vector, estimating the target amplitude vector, and applying a CLEAN Deconvolver to remove the detected target from the data signal vector based on the estimate amplitude vector absent the detected target and an amplitude vector of an undetected target. The process further includes building a detected target vector with the amplitude estimate vector, setting to zero all elements of the detected target vector except at an initial time, and recomputing the amplitude estimate vector by a Reformulated CLEAN Detector.
    Type: Grant
    Filed: September 14, 2010
    Date of Patent: January 22, 2013
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventor: Terry L. Foreman
  • Patent number: 8358238
    Abstract: A hostile missile is identified as being of a type which maneuvers aerodynamically within the atmosphere when it performs an exoatmospheric maneuver which significantly changes its specific energy. When the determination is made that the hostile missile is an atmospheric maneuvering missile, the hostile missile is engaged with an interceptor which is guided toward a predicted intercept point (PIP) assuming horizontal hostile missile flight at an altitude above a specified minimum altitude.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: January 22, 2013
    Assignee: Lockheed Martin Corporation
    Inventor: Daniel L. Friedman
  • Publication number: 20130016004
    Abstract: A photonic-assisted digital radar system comprising an active electronically-scanned antenna; a transmitting section comprising a waveform generator to generate a modulating signal; and a modulator to receive a transmission carrier and the modulating signal and to modulate the transmission carrier by means of the modulating signal; and a receiving section comprising a photonic-assisted analog-to-digital converter to convert electric analog signals into electric digital signals; and a digital signal processor to receive and process the electric digital signals. The photonic-assisted analog-to-digital converter comprises a mode-locked laser to generate an optical clock signal; and an electronic analog-to-digital converter; wherein the electronic analog-to-digital converter, the waveform generator, the modulator and the digital signal processor are configured to operate based on electric clock signals generated based on the optical clock signal.
    Type: Application
    Filed: April 16, 2012
    Publication date: January 17, 2013
    Applicant: Selex Sistemi Integrati S.p.A.
    Inventors: Luigi Pierno, Massimiliano Dispenza, Alessandro Gatta, Annamaria Fiorello, Alberto Secchi, Massimo Ricci
  • Patent number: 8354939
    Abstract: A logging system and method for measuring propped fractures and down-hole subterranean formation conditions including: a radar source; an optical source; an optical modulator for modulating an optical signal from the optical source according to a signal from the radar source; a photodiode for converting the modulated optical signal output from the optical modulator to the source radar signal. A transmitter and receiver unit receives the source radar signal from the photodiode and transmits the source radar signal via at least one antenna attached to the casing and in communication with at least one photodiode into the formation and receives a reflected radar signal. A mixer mixes the reflected radar signal with the source radar signal to provide an output. This can describe fractures connected to the wellbore and differentiate between the dimensions of the two vertical wings of a propped fracture.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: January 15, 2013
    Assignee: Momentive Specialty Chemicals Inc.
    Inventors: Robert R. McDaniel, Michael L. Sheriff, Eric E. Funk, Ethan A. Funk
  • Patent number: 8354950
    Abstract: The present invention relates to a method for characterizing an atmospheric turbulence by representative parameters measured by a radar. The emission beam of the radar carried by an aircraft scanning the zone of the turbulence, a measured parameter being the total variance of the velocity of the turbulence ?U, this total variance at a point x0 inside the turbulence is the sum of the spatial variance of the spectral moment of order 1 of the signals received by the radar Var[M1({right arrow over (x)})] and of the spatial mean of the spectral moment of order 2 of the signals received Mean[M2({right arrow over (x)})], the moments being distributed as a vector {right arrow over (x)} sweeping an atmospheric domain around the point x0. The invention applies notably in respect of meteorological radars fitted to aircraft such as airliners for example.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: January 15, 2013
    Assignee: Thales
    Inventors: Stéphane Jean Kemkemian, Héléne Catherine Thuilliez, Myriam Patricia Nouvel
  • Patent number: 8350749
    Abstract: A method for testing and/or validating the suitability of a multi-radar signature database to be used on radar systems having automatic target recognition. The database may include measured field data and/or modeled synthetic data. The technique allows field data to be compared to the synthetic data using modal mutual information.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: January 8, 2013
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: John Malas, Krishna Pasala, Usha M. Pasala, legal representative
  • Patent number: 8339306
    Abstract: A detection system includes a detection processor configured to receive a frame of image data that includes a range/Doppler matrix, perform a rate-of-change of variance calculation with respect to at least one pixel in the frame of image data, and compare the calculated rate-of-change of variance with a predetermined threshold to provide output data. The range/Doppler matrix may include N down-range samples and M cross-range samples. The detection processor may calculate a rate-of-change of variance over an N×M window within the range/Doppler matrix.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: December 25, 2012
    Assignee: Raytheon Company
    Inventors: Donald P. Bruyere, Ivan S. Ashcraft, John B. Treece
  • Patent number: 8334799
    Abstract: Detecting and grading the state and evolution of wake turbulence caused by an aircraft is made on the basis of radar signals reflected by this turbulence, these signals being analyzed through analysis cells of given dimension in terms of distance and bearing. A first preliminary detection step detects and locates turbulence in a cell. A second step determines the strength of the detected turbulence, while a third step determines the age of the detected turbulence as well as the geometric parameters which characterize it. This method makes it possible to detect wake turbulence and to determine at one and the same time the position and the strength of the latter as well as its stage of evolution.
    Type: Grant
    Filed: May 13, 2008
    Date of Patent: December 18, 2012
    Assignee: Thales
    Inventor: Frédéric Stéphane Barbaresco
  • Patent number: 8334802
    Abstract: A radar system includes radars and a controller. The controller controls waveform patterns of the radars. As a signal processing unit of each of the radars receives an instruction from the controller, the signal processing unit selects a frequency modulation pattern of a VCO between an FM-CW mode and a CW mode stored in a waveform memory to perform mode switching, and then outputs a radio wave from a transmission antenna. Then, the controller instructs each signal processing unit for a frequency modulation pattern of each radar or an output timing of each pattern so that a time, at which continuous wave signals output from the radars have the same frequency, is not continuous.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: December 18, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Masaru Ogawa
  • Publication number: 20120313813
    Abstract: A direct-to-digital software defined radar system includes a high-speed digitizer coupled directly to a receive antenna and outputs a digital signal to a processor which receives the digitized signal, along with an arbitrarily-defined reference signal provided by signal generator, and indexes the signal data according to time and geo-location, arranges the data according to a three-dimensional data structure, declutters and filters and refines the data for storage or display.
    Type: Application
    Filed: May 29, 2012
    Publication date: December 13, 2012
    Inventor: John W. Brooks
  • Patent number: 8330647
    Abstract: A land-based smart sensor system and several system architectures for detection, tracking, and classification of people and vehicles automatically and in real time for border, property, and facility security surveillance is described. The preferred embodiment of the proposed smart sensor system is comprised of (1) a low-cost, non-coherent radar, whose function is to detect and track people, singly or in groups, and various means of transportation, which may include vehicles, animals, or aircraft, singly or in groups, and cue (2) an optical sensor such as a long-wave infrared (LWIR) sensor, whose function is to classify the identified targets and produce movie clips for operator validation and use, and (3) a supercomputer to process the collected data in real-time. The smart sensor system can be implemented in a tower-based or a mobile-based, or combination system architecture. The radar can also be operated as a stand-alone system.
    Type: Grant
    Filed: June 8, 2007
    Date of Patent: December 11, 2012
    Assignee: Vista Research, Inc.
    Inventors: Phillilp A. Fox, Joseph W. Maresca, Jr.
  • Patent number: 8330651
    Abstract: A high resolution, low power marine radar for use in applications such as the newly mandated barge/river radars that are to be used in very confined spaces such as canals. An example radar system includes frequency-modulated/continuous-wave (FM/CW) radar that uses very low transmitter power (a fraction of a watt) and has an exceptionally short sensing range of a few feet or even inches if needed.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: December 11, 2012
    Assignee: Honeywell International Inc.
    Inventor: David C. Vacanti
  • Patent number: 8330642
    Abstract: A high resolution imaging system is used to detect and locate targets using time reversal in rich scattering environments, where the number of scatterers is significantly larger than the number of antennas. Our imaging system performs two major tasks by time reversal: clutter mitigation and target focusing. Clutter mitigation is accomplished through waveform reshaping to suppress the clutter returns. After the suppressed clutter is subtracted from the returned signal, a second time reversal for target focusing is performed. A final image is then obtained by beamforming.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: December 11, 2012
    Assignee: Carnegie Mellon University
    Inventors: Yuanwei Jin, Jose′ M. F. Moura
  • Patent number: 8325084
    Abstract: A calibration system for a dual polarization radar system with built in test couplers has been developed. The system includes a dual polarization radar transmitter antenna that generates a transmission pulse. A test coupler is located behind the antenna that reads a sample of the transmission pulse a test signal. A calibration circuit receives the sample of the transmission pulse and generates a test signal that simulates a desired atmospheric condition. Finally, a test antenna transmits the test signal to the dual polarization radar transmitter antenna for calibration of the system.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: December 4, 2012
    Assignee: Baron Services, Inc.
    Inventor: William H. Walker
  • Patent number: 8319682
    Abstract: A method examining an object using millimeter-wave signals includes: (a) providing at least two millimeter-wave signal sources; (b) transmitting at least two millimeter-wave signals having at least two different frequencies from the signal sources illuminate the object; (c) in no particular order: (1) determining whether a return reflected signal is above a threshold level; [a] if yes, processing the return signal to identify object shape; [b] if not, processing another return signal; and (2) determining whether a return intermodulation product or harmonic signal is detected; [a] if yes, processing the return signal to identify object nature; [b] if not, processing another return signal; (d) determining whether checked all return signals; (1) if not, processing another return signal; (2) if yes, proceeding to step (e); (e) determining whether results are satisfactory; (1) if not, changing frequency of at least one of the wave signals; (2) if yes, terminating the method.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: November 27, 2012
    Assignee: The Boeing Company
    Inventor: Robert A. Smith
  • Publication number: 20120293363
    Abstract: A method and device for recognizing a pulse repetition interval (PRI) modulation type of a radar signal are provided. The method for recognizing a pulse repetition interval (PRI) modulation type includes: extracting time of arrival (TOA) information of pulses aligned in time order from a received radar signal; generating a PRI sequence based on a difference of adjacent TOAs in the TOA information of pulses; generating a difference of PRIs (DPRI) sequence by using a difference of the adjacent PRIs in the PRI sequence; generating respective symbol sequences by using specific partition rules from the PRI sequence and the DPRI sequence; and calculating characteristic factors from the symbol sequences, and comparing the characteristic factors with threshold values for discriminating a PRI modulation type to determine the PRI modulation type. Thus, the PRI modulation type, a promising feature for radar signal identification, can be precisely derived.
    Type: Application
    Filed: September 12, 2011
    Publication date: November 22, 2012
    Inventors: Kyu-Ha SONG, Jin-Woo HAN, Byung-Koo PARK, Je-Il JO
  • 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