Spectrum Analysis Patents (Class 342/192)
  • Patent number: 10520587
    Abstract: A detection method for a given mission comprises at least: one phase of analysing the environment using a waveform chosen beforehand, the signals acquired with this waveform being analysed by processing means in order to deduce therefrom environmental characteristics; and one phase of generating an optimal detection wave depending on the environmental characteristics and characteristics of the mission.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: December 31, 2019
    Assignee: THALES
    Inventors: Vincent Corretja, Gilles Guerrini, Thierry Sfez, Richard Montigny, Jean-Marc Chabroux
  • Patent number: 10514454
    Abstract: Embodiments described herein provide for the improved detection of target(s) in the vicinity of cluttered environments such as wind farms, and for the reduction of false alarms resulting from wind turbines and other complex structures in such environments. Maximum amplitude readings of all non-zero Doppler frequency bins are determined for each resolution cell under test during a dwell and used to determine an aggregate threshold value. In one embodiment, the aggregate threshold value and an existing threshold value are compared and the higher value applied. A tracking sample period and a transition state delay are introduced to determine when the aggregate threshold value for each resolution cell under test should be updated.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: December 24, 2019
    Assignee: The United States of America, as represented by the Administrator of the Federal Aviation Administration
    Inventor: Daniel Parrott
  • Patent number: 10467475
    Abstract: Methods and systems are provided that inventory a plot of trees based on data including one or more (e.g., all) of radar images of the plot, spectral images of the plot (e.g., high resolution images taken by satellite), other data (e.g., elevation, slope, aspect), and actual tree survey data physically collected about the plot and/or another plot having similar characteristics. Although the actual tree survey data collected is typically less than the amount of actual survey data used by prior approaches, the present systems and methods are still capable of inventorying the entire plot with a high degree of confidence (e.g., at least 95% confidence).
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: November 5, 2019
    Assignee: Yale University
    Inventor: Zachary Parisa
  • Patent number: 10379216
    Abstract: A measurement apparatus outputs from a first antenna pair transmission signals (St11) and (St12) whose phase difference (??1) changes over time. A target object simultaneously receives the transmission signals (St11) and (St12) from a target-side antenna and returns to the measurement apparatus information (D?) according to the positional relationship between the target object and the measurement apparatus determined from a reception signal (Sr1). The measurement apparatus outputs from a second antenna pair transmission signals (St21) and (St22) whose phase difference (??2) changes over time. The target object simultaneously receives the transmission signals (St21) and (St22) from the target-side antenna and returns to the measurement apparatus the information (D?) corresponding to the positional relationship between the target object and the measurement apparatus determined from a reception signal (Sr2).
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: August 13, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Koichi Takizawa, Yoshiharu Yoshii, Yoshiyuki Tokiwa
  • Patent number: 10338213
    Abstract: A system for providing an estimate of far-field radar cross-section (RCS) measurements of an aircraft. The system includes a plurality of automatic guided vehicles (AGV) each including a robot arm and a radar unit selectively mounted thereto and being interchangeable with a camera. Each AGV includes an AGV controller for controlling the robot arm, the radar unit and the camera so as to cause the radar unit to provide the near-field RCS measurements or the camera to provide images of the aircraft. The system further includes a real time signature diagnostic sub-system (SDS-RT) responsive to the near-field RCS measurement signals from the radar units and the images from the cameras in real time, and an SDS controller responsive to re-configured near-field RCS measurement signals and images from the SDS-RT and configuring the near-field RCS measurement signals and the images into the estimate of the far-field RCS measurements of the aircraft.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: July 2, 2019
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Martin T. Faulhaber, Robert A. Scow, Richard Warren
  • Patent number: 10247809
    Abstract: A handheld screening device including: an antenna array including a plurality of antennas; an input mechanism to select an operation mode; and a controller to determine a group of antennas of the plurality of antennas, wherein the number of antennas in the group is based on the selected operation mode, and to control the group of antennas to emit electromagnetic waves. A corresponding method operates the handheld screening device.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: April 2, 2019
    Assignee: SONY CORPORATION
    Inventors: Miquel Testar, Furkan Dayi, Ralf Boehnke, Marcel Blech, Qi Wang
  • Patent number: 10228277
    Abstract: Embodiments of the invention are directed to detecting an underwater object from an air-based system. The air-based system is associated with at least one controller. A broadband acousto-optic signal detection device is associated with the air-based platform. The broadband acousto-optic signal detection device is configured to emit a laser beam at an underwater object. The laser beam terminates at the underwater object and reflects back as a return laser beam. The broadband acousto-optic signal detection device is configured to detect and receive the return laser beam.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: March 12, 2019
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Phillip P. Land, Arun K. Majumdar
  • Patent number: 10197667
    Abstract: The invention is related to a method and a signal generator for generating a sea clutter simulation signal used as an input signal for a radar system. The method comprises the steps of: modeling of gravity waves using a physical simulation of a sea surface; modeling of capillary waves using stochastic processes; and adding the modeled capillary waves to the modeled gravity waves.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: February 5, 2019
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Andreas Reil, Steffen Heuel, Carlo Van Driesten
  • Patent number: 10067177
    Abstract: A testing method or apparatus utilizes filter banks to measure time varying or dynamic harmonic distortion or intermodulation distortion from a device. With a stairstep or arbitrary signal and filter banks, Nth order harmonic and or intermodulation distortion is measured via the filter banks at different offsets provided by an arbitrary low frequency signal. An amplifier with crossover distortion will show increased harmonic and or intermodulation distortion near the zero crossing while providing less distortion in other portions of the transfer curve of the amplifier. One or more distortion signals from the device (e.g., audio device) may be measured for a phase and or frequency modulation effect.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: September 4, 2018
    Inventor: Ronald Quan
  • Patent number: 10036769
    Abstract: An apparatus for efficient, precise and accurate measurement of the frequency, amplitude, and phase of a single input tone frequency and/or multiple separable input tone frequencies. Tone separability can be achieved by proper selection of the parameter N, the sample length of the DFT/FFT. Application of the invention includes but is not limited to test and measurement, tone interference removal, and communications systems, where precise and accurate measurement of tonal parameters is needed.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: July 31, 2018
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Andrew J. Noga, Daniel L. Stevens
  • Patent number: 9971031
    Abstract: A method and system generates a three-dimensional (3D) image by first acquiring data from a scene using multiple parallel baselines and multiple different pulse repetition frequencies (PRF), wherein the multiple baselines are arranged in a hyperplane. Then, a 3D compressive sensing reconstruction procedure is applied to the data to generate the 3D image corresponding to the scene.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: May 15, 2018
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Dehong Liu, Petros Boufounos
  • Patent number: 9927519
    Abstract: In a general aspect, motion detected using wireless signals is categorized. In some aspects, frequency response signals are obtained. The frequency response signals are based on wireless signals that were transmitted through a space and received at a wireless sensor device over a time period. Values of a statistical parameter are determined for the time period, with the statistical parameter for the time period being based on a function applied to frequency components of the frequency response signals over the time period. A category of motion that occurred in the space during the time period is identified based on the values of the statistical parameter.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: March 27, 2018
    Assignee: Cognitive Systems Corp.
    Inventors: Mohammad Omer, Stephen Arnold Devison, Yunfeng Piao, Dustin Griesdorf, Tajinder Manku, Oleksiy Kravets, Christopher Vytautas Olekas
  • Patent number: 9891312
    Abstract: Systems and methods for providing personal radar, object presence detection, and object localization are provided. Multiple devices that perform high-resolution ranging can be operated to perform radar in an area, detect objects and motion of objects in the area, and generate a virtual steerable antenna.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: February 13, 2018
    Assignee: Greina Technologies, Inc.
    Inventors: Daniel Joseph Lee, Thomas Schmid
  • Patent number: 9817117
    Abstract: A survey system including a multibeam echo sounder having a single projector array and a single hydrophone array constructs a multi-component message for ensonifying multiple fans and deconstructs a corresponding message echo for use in analyzing the returns from each fan.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: November 14, 2017
    Assignee: R2Sonic, LLC
    Inventors: Jens Steenstrup, Christopher Tiemann, Mark Chun, Kirk Hobart
  • Patent number: 9645233
    Abstract: Embodiments include an apparatus comprising a frequency selective electromagnetic receiver and a signal analyzing module. The frequency selective electromagnetic receiver is configured to receive a reradiating electromagnetic signal resulting from a cavity induced modulation phenomenon occurring within cavit(ies). The signal analyzing module is configured to: determine a power spectral density of the reradiating electromagnetic signal. Frequencies are observed at which the amplitude modulation of the power spectral density peaks. A cavity length is determined employing the frequencies of the power spectral density peaks.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: May 9, 2017
    Inventor: Kenneth J Hintz
  • Patent number: 9562967
    Abstract: A method of controlling a radar system by: receiving a radar return signal from a target and generating a range-Doppler target image signature of the target; selecting a spectral line within the range-Doppler target image signature from a modulation feature on the target which includes an effective point scatterer; providing a range profile for the spectral line; obtaining a reference range profile of a reference point scatterer; and determining a difference between a power at a range shorter than a peak corresponding to the modulation feature in the range profile and a power at a corresponding range of the reference range profile. The method may further include controlling provision of the range-Doppler target image signature based on the difference.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: February 7, 2017
    Assignee: BAE SYSTEMS plc
    Inventors: David James Emery, Peter Donald Fraser Tait
  • Patent number: 9369958
    Abstract: A method detects misconfiguration of a wireless network which wastes battery power in mobile devices within a location area of the network. A data collection agent installed in a wireless device records and reports idle-mode handovers. An analytics circuit reads RF measurements and locations from these reports to suggest where handover zones may be optimized or IRAT cell resection parameters are defective. A mobile device may self-tune battery consumption by determining its individual location areas of high battery consumption; desensitizing itself to cell signal strength instability; and increasing its tenacity to a most recently used cell.
    Type: Grant
    Filed: December 29, 2013
    Date of Patent: June 14, 2016
    Assignee: CARRIER IQ, INC.
    Inventors: Benoit Pasquereau, David Paul Hayter
  • Patent number: 9239372
    Abstract: A spectral feature extracting engine, chirp detecting engine, and target classifying engine with corresponding method, system, and computer product are provided. Given a “noisy” signal having multiplicative and additive noise, the spectral feature extracting engine extracts spectral features from the noisy signal in the form of a spectral detection density. The extraction includes identifying an initial detection by comparing the spectral content of a subject time-frequency slice with an initial detection threshold calculated from a set of time-frequency slices, and determining the spectral detection density as a function of a number of identified initial detections and number of compared time-frequency slices. Based on the spectral detection density of the noisy signal, the chirp detecting engine detects multiple channel-induced and target-induced chirps present in the noisy signal and the target classifying engine classifies a target from the noisy signal.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: January 19, 2016
    Assignee: Raytheon Company
    Inventors: Ghassan C. Maalouli, Brett J. Young
  • Patent number: 9041592
    Abstract: A radar sensor and a method of detecting an object by using the same are provided. The method includes: receiving at least one radar signal reflected from the object; converting the received at least one radar signal to at least one signal in a frequency domain; accumulating the converted at least one signal for a predetermined time and extracting at least one feature from the accumulated at least one signal; and identifying the object by comparing the extracted at least one feature with at least one reference value stored in a database.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: May 26, 2015
    Assignee: SAMSUNG TECHWIN CO., LTD.
    Inventor: Ki-Yong Jeon
  • Patent number: 8988272
    Abstract: A method and apparatus are provided for detecting a RADAR signal. RADAR channel data in a frequency range is received, where the frequency range is divided into a plurality of equally wide channels. The received RADAR channel data is digitally processed and analyzed to identify a signal in the RADAR channel data in the frequency range. The frequency range is advanced to a next channel of the plurality of channels, where the frequency range of the next channel of the plurality of channels is nonsequential with the frequency range of the first channel. The steps of receiving, processing, and analyzing are repeated for the next channel of the plurality of channels.
    Type: Grant
    Filed: September 14, 2010
    Date of Patent: March 24, 2015
    Assignee: Escort Inc.
    Inventor: Igor Chernukhin
  • Patent number: 8970426
    Abstract: A system for suppressing clutter in a radar system is provided. The system includes an antenna configured to receive radar signals containing clutter and a digital receiver adapted to convert the radar signals received by the radar arrays to complex I/Q samples. These I/Q samples are provided to a Doppler filter bank comprising a plurality of Doppler filters for filtering the pulse compressed data into Doppler bins representative of range values according to Doppler frequency. The system further includes at least one processor for comparing the output of each of the plurality of Doppler filters types to respective background clutter maps, and identifying the Doppler filter which outputs the radar return signal with the greatest magnitude over the clutter map. Once identified, target detection operations may be performed on the output of the identified Doppler filter.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: March 3, 2015
    Assignee: Lockheed Martin Cproration
    Inventors: Peter H. Stockmann, David M. Mittiga
  • Patent number: 8939367
    Abstract: An apparatus for measuring the orientation of the longitudinal axis of a cavity comprising a signal receiver, a signal processor and analyzer and a cavity axis orientation analyzer. The signal receiver receives a reflected signal resulting from an interaction of multi-frequency irradiating signal(s) with at least one cavity. The irradiating signal may include an electromagnetic or acoustic signal above a cavity dependent cutoff frequency with a randomized or deterministic spectral component. The signal analyzer computes a power spectral density of the reflected signal. The local maxima of the power spectral density are identified and used to determine the cavity longitudinal axis orientation. The cavity may be the bore of a weapon.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: January 27, 2015
    Inventor: Kenneth James Hintz
  • Patent number: 8928524
    Abstract: The present disclosure relates to the field of pulse compression in signal processing, and more particularly, to systems and methods for the synthesis of waveforms for suppressing sidelobes and sidebands using a combination of time and spectral control. More specifically, the present disclosure relates to a set of waveform symbols which can be used to maximize use of disaggregated grey-space spectrum, adapt to changing spectral condition, and maintain or enhance data rates relative to standard binary phase-shift keying (BPSK) under normal conditions.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: January 6, 2015
    Assignee: Technology Service Corporation
    Inventors: Carroll J. Nunn, Menachem Levitas
  • Publication number: 20140368377
    Abstract: A frequency reference device that includes a frequency reference generation unit to generate a frequency reference signal based on an absorption line of a gas.
    Type: Application
    Filed: June 12, 2013
    Publication date: December 18, 2014
    Inventors: Phillip Michel NADEAU, Django TROMBLEY, Baher S. HAROUN, Srinath Mathur RAMASWAMY
  • Patent number: 8874390
    Abstract: An instrument (100) is provided according to an embodiment of the invention. The instrument (100) includes an interface (101) configured to receive a Doppler measurement signal and a processing system (112) coupled to the interface (101) and receiving the Doppler measurement signal. The processing system (112) is configured to generate a two-sided velocity spectrum including a plurality of discrete frequency bins from the Doppler measurement signal, with the two-sided velocity spectrum distinguishing spectral elements, and process one or more velocity spectrum bin pairs against a plurality of local gate thresholds, with the one or more velocity spectrum bin pairs being substantially symmetrically located about one or more carrier wave bins and wherein each velocity spectrum bin pair is processed against a corresponding local gate threshold of the plurality of local gate thresholds.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: October 28, 2014
    Assignee: Hach Company
    Inventor: David Langley Rick
  • Patent number: 8866668
    Abstract: In a radar apparatus, a peak extractor performs frequency analysis on a beat signal to obtain a frequency spectrum for each of first and second detection modes based on the beat signal for a corresponding one of the first and second detection modes. The peak extractor extracts a plurality of first peak-signal components from the frequency spectrum obtained for the first detection mode, and a plurality of second peak-signal components from the frequency spectrum obtained for the second detection mode. A determiner compares each of the plurality of first peak-signal components with a corresponding one of the plurality of second peak-signal components to deter mine whether a noise is included in the beat signal according to a result of the comparison.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: October 21, 2014
    Assignee: Denso Corporation
    Inventor: Hideki Kitagawa
  • Patent number: 8854248
    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: October 7, 2014
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: David W. Paglieroni, N. Reginald Beer, Steven W. Bond, Philip L. Top, David H. Chambers, Jeffrey E. Mast, John G. Donetti, Blake C. Mason, Steven M. Jones
  • Patent number: 8854249
    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: October 7, 2014
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: David W. Paglieroni, N. Reginald Beer
  • Patent number: 8854258
    Abstract: A method of synthetic imaging comprising the steps of: emitting a first electromagnetic signal having a first frequency from a first radiation source, emitting at least one second electromagnetic signal having a second frequency from a second radiation source, wherein the first and second frequencies are different from each other, substantially simultaneously receiving the first signal and the second signal with a first receiver, substantially simultaneously receiving the first signal and the second signal with at least one second receiver, arranging an object on the path of at least one electromagnetic signal between the radiation sources and the receivers, wherein the signals are reflected by the object before they meet the receivers, and computing an image of the object from the signals received by the receivers and a device for practicing the method.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: October 7, 2014
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventor: Viktor Krozer
  • Patent number: 8847815
    Abstract: An electronic scanning radar apparatus mounted on a moving object includes a receiving unit including a plurality of antennas receiving a received wave arriving from a target having reflected a transmitted wave, a beat signal generating unit generating a beat signal from the transmitted wave and the received wave, a frequency resolving unit resolving the beat signal in beat frequencies and to calculate complex data based on the beat signal resolved for each beat frequency, and an azimuth detecting unit calculating a direction of arrival of the received wave based on original complex data calculated based on the beat signal, wherein the azimuth detecting unit includes a data extending unit generating extended complex data by extending the number of data based on the original complex data, and a first computation processing unit calculating the direction of arrival of the received wave based on the extended complex data.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: September 30, 2014
    Assignee: Honda elesys Co., Ltd.
    Inventor: Junji Kanamoto
  • Patent number: 8823580
    Abstract: In a method for frequency matching in an FMCW radar sensor, a plurality of frequencies, which are derived on various modulation ramps, and which respectively are shown by the radar sensor in a d-v space as geometrical locations, represent possible combinations of a distance d and a speed v of the respective object. In order to identify the objects located on the various modulation ramps, coincidences between the geometrical locations which belong to frequencies derived on various modulation ramps are searched for. The search for coincidences is initially restricted in a first step to a subspace of the d-v space, and in a subsequent step, the search is extended to other regions of the d-v space, while suppressing the frequencies that are associated with the objects found in the first step.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: September 2, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Volker Gross, Wolf Steffens, Stephan Leinbaum, Goetz Kuehnle, Andre Treptow
  • Patent number: 8816902
    Abstract: There is provided a radar apparatus for detecting a target. A detection signal generating unit generates detection signals of the target based on transmission and reception waves of antennas. A detection signal processing unit performs frequency analysis on the detection signals to extract signal components of the target, and performs a predetermined process on the signal components to calculate at least one of a distance to the target, a relative speed to the target, and an orientation of the target. The detection signal generating unit includes a filter unit for giving changes to the detection signals in a frequency bandwidth higher than Nyquist frequency which is a half a sampling frequency. The detection signal processing unit acquires the signal components from the detection signals to which the filter unit gives the changes to determine whether the signal components are generated by replication due to the Nyquist frequency.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: August 26, 2014
    Assignee: Fujitsu Ten Limited
    Inventor: Hiroshi Itoh
  • Patent number: 8816900
    Abstract: In an environment inspection mode of a calibration system, a radar device executes a signal analysis process to calculate an eigenvalue ratio of each comparison eigenvalue. The eigenvalue ratio has a small value when a pair of eigenvalues corresponding to arrival radar waves has a strong correlation. On the other hand, the eigenvalue ratio has a large value when the eigenvalue ratio is calculated between an eigenvalue and thermal noise. When there is no eigenvalue which is not more than a reference threshold value, the radar device indicates a notice that the current environment is suitable for the calibration of the radar device. On the other hand, when there is presence of at least one eigenvalue of not more than the reference threshold value, the radar device indicates a notice that the current environment is unsuitable for the calibration of the radar device.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: August 26, 2014
    Assignee: Denso Corporation
    Inventors: Yutaka Hasegawa, Koji Shimizu
  • Patent number: 8791856
    Abstract: Systems and methods for automatically determining a noise threshold are provided. In one implementation, a system comprises: an antenna configured to gather data about a surrounding environment; a processing unit configured to remove samples representing target data from the gathered data; to estimate the noise floor from the gathered data with the removed target data; and to determine a noise threshold from the estimated noise floor; and a memory device configured to store the estimated noise floor.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: July 29, 2014
    Assignee: Honeywell International Inc.
    Inventors: David C. Vacanti, Radde Majeed, Anthony H. Luk
  • Patent number: 8742983
    Abstract: According to one embodiment, a calculating of a weight includes which is calculating a covariance matrix by applying a process (Post-Doppler process) of selecting a plurality of banks after execution of a Doppler filter process to a specified number of pulses of the received signal, and extracting a plurality of arbitrary bank parts from among the plurality of selected banks which are used for the calculation of the covariance matrix, and calculating a plurality of weights on a phase and an amplitude, from a matrix of the plurality of extracted bank parts.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: June 3, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Junichiro Suzuki, Toshiyuki Miyazaki, Mitsuyoshi Shinonaga
  • Patent number: 8730099
    Abstract: An electronic scanning type radar device mounted on a moving body includes: a transmission unit transmitting a transmission wave; a reception unit comprising a plurality of antennas receiving a reflection wave of the transmission wave from a target; a beat signal generation unit generating a beat signal from the transmission wave and the reflection wave; a frequency resolution processing unit frequency computing a complex number data; a target detection unit detecting an existence of the target; a correlation matrix computation unit computing a correlation matrix from each of a complex number data of a detected beat frequency; a target consolidation processing unit linking the target in a present detection cycle and a past detection cycle; a correlation matrix filtering unit generating an averaged correlation matrix by weighted averaging a correlation matrix of a target in the present detection cycle and a correlation matrix of a related target in the past detection cycle; and a direction detection unit compu
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: May 20, 2014
    Assignee: Honda elesys Co., Ltd.
    Inventors: Junji Kanamoto, Hiroyuki Akimoto
  • Patent number: 8730098
    Abstract: Methods are described for radar detection of persons wearing wires using radar spectra data including the vertical polarization (VV) radar cross section and the horizontal polarization (HH) radar cross section for a person. In one embodiment, the ratio of the vertical polarization (VV) radar cross section to the horizontal polarization (HH) radar cross section for a person is compared to a detection threshold to determine whether the person is wearing wires. In another embodiment, the absolute difference of the vertical polarization (VV) radar cross section and the horizontal polarization (HH) radar cross section for a person is compared to a detection threshold to determine whether the person is wearing wires. To reduce false positives, other additional indicators, such as speed of movement, and or visual features of the person, can be used to further narrow a person suspected of wearing wires.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: May 20, 2014
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: William P. Fox
  • Patent number: 8730096
    Abstract: An electronic scanning type radar device mounted on a moving body includes: a transmission unit transmitting a transmission wave; a reception unit comprising a plurality of antennas receiving a reflection wave of the transmission wave from a target; a beat signal generation unit generating a beat signal from the transmission wave and the reflection wave; a frequency resolution processing unit frequency computing a complex number data; a target detection unit detecting an existence of the target; a correlation matrix computation unit computing a correlation matrix from each of a complex number data of a detected beat frequency; a target consolidation processing unit linking the target in a present detection cycle and a past detection cycle; a correlation matrix filtering unit generating an averaged correlation matrix by weighted averaging a correlation matrix of a target in the present detection cycle and a correlation matrix of a related target in the past detection cycle; and a direction detection unit compu
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: May 20, 2014
    Assignee: Honda elesys Co., Ltd.
    Inventors: Junji Kanamoto, Hiroyuki Akimoto
  • Patent number: 8723716
    Abstract: A communication device includes an oscillator to generate an oscillation signal; a harmonic generator to generate a higher harmonic wave from the oscillation signal; a first filter to take out a first high frequency signal; a second filter to take out a second high frequency signal; a down conversion mixer to use the second high frequency signal to perform down conversion of a signal obtained by receiving a reflected signal of the first high frequency signal; a hybrid coupler to generate a first intermediate frequency signal and a second intermediate frequency signal, which are orthogonal with each other; a first mixer to take out a first baseband signal by mixing an output from the down conversion mixer with the first intermediate frequency signal; and a second mixer to take out a second baseband signal by mixing an output from the down conversion mixer with the first intermediate frequency signal.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: May 13, 2014
    Assignee: Fujitsu Limited
    Inventor: Yasuhiro Nakasha
  • Patent number: 8704706
    Abstract: According to one embodiment, a radar return signal processing apparatus includes a detector, an estimation unit and an extraction unit. The detector detects an average Doppler frequency, a spectrum width, and a received power of each of echoes, from a radar return signal obtained repeatedly at regular intervals. The estimation unit estimates an optimum mixed density function by learning modeling a shaped of the frequency spectrum by calculating repeatedly a sum of density functions of each of the echoes. The extraction unit extracts information on any one of the echoes included in the radar return signal, from a parameter of the estimated mixed density function.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: April 22, 2014
    Assignees: Kabushiki Kaisha Toshiba, Tokyo University of Agriculture and Technology, a National University Corporation of Japan
    Inventors: Hideki Marui, Toshihisa Tanaka, Satoshi Kon, Fumihiko Mizutani, Masakazu Wada, Hiroshi Ishizawa
  • Patent number: 8692708
    Abstract: Radiometric imaging for scanning a scene includes a radiometer for detecting radiation emitted in a predetermined spectral range from a spot of the scene and for generating a radiation signal from the detected radiation. Spot movement circuitry effects a movement of the spot, from which the radiation is detected, to various positions. Control circuitry controls the spot movement circuit to effect the movement of the spot from one position to another position so that radiation is detected at a number of spots distributed over the scene. The number is lower than the number of pattern signals of the high-density signal pattern and the radiation signals generated from the radiation detected at the number of spots form a low-density signal pattern. Processing circuitry processes the radiation signals of the low-density signal pattern and generates the high-density signal pattern by applying compressive sensing to the low-density signal pattern.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: April 8, 2014
    Assignee: Sony Corporation
    Inventor: Juan Nogueira-Nine
  • Patent number: 8682821
    Abstract: A method of detecting movement includes using a radar sensor to monitor a space, and receiving an output signal from the radar sensor. A Fourier transform is performed on the output signal to produce a frequency domain signal spectrum. The frequency domain signal spectrum is transformed into an acoustic domain signal. It is decided whether the output signal is indicative of movement of a predetermined object or a non-human animal dependent upon at least one feature of the acoustic domain signal and at least one spectral feature of the signal spectrum.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: March 25, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Diego Benitez, Zhaozhang Jin
  • Patent number: 8674871
    Abstract: The invention relates to environmental characterization on the basis of an Ultra Wide Band (UWB) radiofrequency communication network. Pulses are emitted and the waveform received is compared with predicted waveforms corresponding to well determined interactions between the wave and its environment. The comparison is done by searching for maximum temporal correlation. The interactions can be notably reflections of the wave on walls or obstacles. The deformations are very dependent on the nature of the materials and directions in which the pulses are emitted and received. If predicted waveforms are stored for various pairs of direction of emission and of reception, it is possible through these correlation operations to find where a wall which gave rise to a reflection is situated.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: March 18, 2014
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Benoît Denis, Vincenzo La Tosa, Bernard Uguen, Friedman Tchoffo-Talom
  • Publication number: 20140070983
    Abstract: A spectral feature extracting engine, chirp detecting engine, and target classifying engine with corresponding method, system, and computer product are provided. Given a “noisy” signal having multiplicative and additive noise, the spectral feature extracting engine extracts spectral features from the noisy signal in the form of a spectral detection density. The extraction includes identifying an initial detection by comparing the spectral content of a subject time-frequency slice with an initial detection threshold calculated from a set of time-frequency slices, and determining the spectral detection density as a function of a number of identified initial detections and number of compared time-frequency slices. Based on the spectral detection density of the noisy signal, the chirp detecting engine detects multiple channel-induced and target-induced chirps present in the noisy signal and the target classifying engine classifies a target from the noisy signal.
    Type: Application
    Filed: September 13, 2012
    Publication date: March 13, 2014
    Applicant: RAYTHEON COMPANY
    Inventors: Ghassan C. Maalouli, Brett J. Young
  • Patent number: 8670506
    Abstract: An apparatus according to an embodiment of the present invention for providing a reduced representation in a frequency-domain, based on a time-based RF signal, has a time-frequency converter adapted to transform the time-domain RF signal to obtain a frequency-domain representation based on the time-domain signal and an entropy encoder adapted to obtain the reduced representation based on the frequency-domain representation by entropy encoding.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: March 11, 2014
    Assignee: Innovationszentrum fuer Telekommunikationstechnik GmbH IZT
    Inventors: Rainer Perthold, Dieter Weninger
  • Patent number: 8654001
    Abstract: A method for detecting electromagnetic threats to an aircraft, wherein electromagnetic fields are measured, and in the case of an arising threat to the aircraft being detected, countermeasures are taken, characterized by the following steps: measuring the frequency and the amplitude of at least one electromagnetic field in the frequency range from 9 KHz to 40 GHz; analyzing the measured results and determining the field intensity in relation to each measured frequency; comparing the field intensity in relation to each measured frequency with stored limiting values or qualification values, wherein the aircraft is qualified for field intensities that are lower than the limiting values; and providing the result in the form of a warning signal in the case of approaching or exceeding a limiting value.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: February 18, 2014
    Assignee: Eurocopter Deutschland GmbH
    Inventors: Wolfgang Tauber, Wolfgang Kreitmair-Steck, Bernd Wolff
  • Patent number: 8648746
    Abstract: A network analyzer includes an n-port network with two ports for measuring wave parameters of a measurement object. Each port has a feed for a radio-frequency signal from a signal source. Signal components of the radio-frequency signal fed into the respective port are reflected at the measurement object and the signal components of one or more radio-frequency signals fed into at least one other port are transmitted through the measurement object to the respective port are measured as wave parameters. The two ports are supplied with different radio-frequency signals, wherein frequencies or frequency bands are offset with respect to one another by a frequency offset. Reflected and transmitted signal components of the radio-frequency signals are measured at the same time at the two ports.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: February 11, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Florian Poprawa, Andreas Schicht, Claus Seisenberger, Andreas Ziroff
  • Patent number: 8648743
    Abstract: A method and an arrangement are provided for producing a computed distribution of speeds of scatterers in a target volume (1701). An estimate distribution of speeds at which scatterers would move in the target volume is provided (1201). It is converted (1202) to a candidate autocorrelation function that represent autocorrelation data points that a pulse radar would measure from the current estimate distribution. The fit of a candidate ACF to a measured ACF is measured (1203). The estimate distribution is accepted if a measured fit fulfills a predefined acceptance criterion, or modified (1205) in which case processing returns to the conversion of the modified estimate distribution to an ACF. An accepted estimate distribution is output (1206) as a computed distribution of speeds that describes the actual distribution of speeds.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: February 11, 2014
    Assignee: Eigenor Oy
    Inventor: Jorn Sierwald
  • Patent number: 8638254
    Abstract: A signal processing device performs object detection processing in which peak signals each representing a differential frequency between a transmitted signal in which a frequency thereof changes in a predetermined cycle and a received signal are derived in a first period where the frequency of the transmitted signal rises and a second period where the frequency of the transmitted signal falls, and the peak signals in the first period are paired with the peak signals in the second period to detect object information related to the peak signals. A range setting unit sets a frequency range in each of the first period and the second period on the basis of a frequency of an integer multiple of the peak signal related to the object information which has been detected in previous object detection processing. A signal setting unit sets a peak signal as a specific peak signal in a case where the peak signal is within the frequency range in each of the first period and the second period.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: January 28, 2014
    Assignee: Fujitsu Ten Limited
    Inventors: Jun Itoh, Tokio Shinagawa, Daisuke Nakabayashi, Hiroyuki Ishimori
  • Patent number: 8624775
    Abstract: Four rows on one side of linear arrays arranged at equal intervals in the vertical direction and arranged at a predetermined interval in the horizontal direction form transmission channels and remaining twelve rows form a reception channel group. Among the remaining twelve rows, linear arrays of four rows in the center form a reception-first-array with each row set as a channel unit. Linear arrays of eight rows on both sides form a reception-second-array with two rows set as a channel unit. In wide-angle-middle-detection-processing, signals are combined using the reception-first-array. In long-detection-processing, signals are combined using the reception-second-array. Second null of a radiation pattern by a transmission array and first null of the reception-second-array are matched. The first null of the transmission array is filled such that a gain difference between the first null and a first side lobe of the transmission array is within a predetermined value.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: January 7, 2014
    Assignees: Mitsubishi Electric Corporation, Denso Corporation
    Inventors: Kazuyoshi Inami, Takamasa Ando