Other Than Doppler (e.g., Range Rate) Patents (Class 342/105)
  • Patent number: 10374732
    Abstract: The invention is directed to methods for radio frequency spectral analysis. Accordingly, flight instructions are executed on a first UAV to fly in a first flight pattern relative to a signal source. The first UAV detects radio signal(s) from the signal source and associated signal data. Flight instructions are concurrently executed on a second UAV to fly in a second flight pattern, relative to the first flight pattern of the first UAV. The second UAV also detects radio signal(s) from the signal source and associated signal data. The stored signal data from the drones may then be processed for visualization.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: August 6, 2019
    Inventors: Howard Melamed, Stevan Melamed, Chris Svanberg, Matias Ponce, Michael Horvat
  • Patent number: 9798006
    Abstract: A quantum photonic imaging device used in an underwater vehicle for stealthy detection of underwater objects includes a photon generating module that generates an entangled pair of photons that includes a signal photon and an ancilla photon, wherein the ancilla photon is retained within the device; a transmitter that transmits the signal photon towards a region of space for detecting an underwater object; a receiver that detects an incoming photon to the device; and a correlation module that distinguishes the signal photon that is reflected back to the receiver due to a presence of the object from environmental noise photons, wherein the distinguishing includes determining an entanglement correlation of the detected photon with the ancilla photon, and wherein a presence of the entanglement correlation between the detected photon and the ancilla photon indicates that the detected photon is the signal photon reflected back from the object.
    Type: Grant
    Filed: July 16, 2015
    Date of Patent: October 24, 2017
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Marco Lanzagorta
  • Patent number: 9612124
    Abstract: In a navigation system and method, location-aware adjustments may be made to the accuracy and/or power of the navigation system by changing at least one setting of a navigation system receiver in response to at least one characteristic of a navigation route and/or an estimated current position of the receiver. By providing location-aware adjustments, the accuracy may be increased when a higher accuracy is desired and may be decreased when a lower accuracy is sufficient based on the receiver location. A higher accuracy setting may be used, for example, when the estimated current position of a navigation system receiver is within the vicinity of a waypoint along the navigation route and a lower accuracy setting may be used at other times to reduce power consumption. Of course, many alternatives, variations, and modifications are possible without departing from this embodiment.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: April 4, 2017
    Assignee: INTEL CORPORATION
    Inventors: Jonathan Segev, Ehud Reshef
  • Patent number: 9497055
    Abstract: Circuitry and methods are described for digital signal demodulation. In a polar receiver, a modulated radio-frequency input signal is provided to frequency division circuitry, which may include a harmonic injection-locked oscillator (ILO). The phase of the frequency-divided output is measured using a self-triggered time-to-digital converter (TDC), which may be a Vernier TDC. A subtractor subtracts a period offset from the output of the TDC to generate an offset digital time output, and a digital integrator integrates the offset digital time output. The integrated time signal represents the phase of the radio-frequency input signal and can be used to determine a symbol, such as a phase-shift keying (PSK) or quadrature amplitude modulation (QAM) symbol, conveyed by the modulated radio-frequency input signal.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: November 15, 2016
    Assignee: INNOPHASE INC.
    Inventors: Yang Xu, Sara Munoz Hermoso, Roc Berenguer Perez
  • Patent number: 9428186
    Abstract: Vehicular arrangement for obtaining information about objects exterior to the vehicle includes distance measuring systems fixed to the vehicle along the windshield, an edge or side of the vehicle, each including a camera that obtains images of objects exterior of the vehicle and a processor that determines a distance between the vehicle and objects included in images obtained by the camera and a speed of the objects based on the successive distance determinations. A reactive system is arranged on the vehicle and coupled to the distance measuring systems, and considers distance between the objects and the vehicle and the speed of the objects and reacts accordingly. A position of the distance measuring systems is selected to encompass an area in front of the vehicle, an area behind the vehicle and an area on each side of the vehicle in the fixed fields of view of the distance measuring systems.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: August 30, 2016
    Assignee: Intelligent Technologies International, Inc.
    Inventor: David S. Breed
  • Patent number: 9253728
    Abstract: In general, in one aspect, a method includes receiving, on a mobile device, an indication that an application executing on the mobile device has entered a background state, determining, based on data received from a location system of the mobile device, that the mobile device has remained within a geographic area during a time interval, the geographic area being defined by a radius determined according to an application type of the application, and disabling at least a portion of the location system of the mobile device.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: February 2, 2016
    Assignee: Apple Inc.
    Inventors: Glenn Donald MacGougan, Jay N. Bruins, Robert Mayor, Ronald K. Huang, Stephen J. Rhee
  • Patent number: 9170323
    Abstract: A pulse radar range profile motion compensation method (10) comprises: acquiring receiver samples (12); acquiring an estimate of the range rate of a target (14); removing an additional phase acquired by the echo signals; removing a shift in range cells of the receiver samples (18); applying a pulse Doppler filter (22); identifying the peak Doppler frequency and calculating a shift from zero of the peak Doppler frequency (24); calculating a range rate correction (26); adding the range rate correction to the estimate of the range rate and repeating the removal of the additional phase (16) and the shift in range cells (18), and using the new range rate estimate to obtain motion compensated receiver samples (28); and generating an output signal indicative of the motion compensated receiver samples for generating a range profile (30).
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: October 27, 2015
    Assignee: BAE SYSTEMS PLC
    Inventor: Andrew French
  • 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: 8963767
    Abstract: A method for detecting the motion of object by ultra-wideband radar imaging and system thereof to be used to present the motion of object in a reference gray-level image by using the delay time to analyze the distance between the detected position of object and the detecting position to compare the time-varying distance variation between the reference distance and the detecting distance. The system includes a transmitter module, a receiver module and a signal processing module. The transmitter module is used to transmit a first ultra-wideband signal from a detecting position to the object. The receiver module is used to receive a second ultra-wideband signal reflected from the object in the detecting position. The signal processing module is used to analyze the signal delay time of the second ultra-wideband signal received in the detecting position to analyze the detecting distance between the second ultra-wideband signal and the detecting position.
    Type: Grant
    Filed: December 24, 2012
    Date of Patent: February 24, 2015
    Assignee: National Taiwan University
    Inventors: Pai-Chi Li, Tsung-Chuan Chen
  • Publication number: 20140327565
    Abstract: The present invention relates to a process for determining a position change or the resting and/or a speed of an object and a corresponding process for supporting an inertial measurement system. In the process at least one radio signal (FS) is received on the object (O) at at least one first and one second point in time, particularly continuously, and the change of the phase of said radio signal is determined for a determination of a relative movement between source (U) of said signal or a reference location and said object (O), and the relative movement between source (U) of said signal or the reference location and said object (O) is detected.
    Type: Application
    Filed: January 5, 2012
    Publication date: November 6, 2014
    Inventor: Ronne Reimann
  • Patent number: 8842037
    Abstract: A process for reducing erroneous plots when detecting targets using High Frequency surfacewave radar (HFSWR) is provided. Detection of genuine targets is thereby enhanced. A first difference in range of an apparent target is determined, based on range data, associated with the apparent target. A second difference in range of the apparent target is determined, based on Doppler data, associated with the apparent target. The first and second range differences are compared to one another over time to assess a consistency therebetween.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: September 23, 2014
    Assignee: BAE Systems plc
    Inventor: David James Emery
  • Patent number: 8830116
    Abstract: A radar wave sensing apparatus including a rotation element, a nanosecond pulse near-field sensor and a control unit is provided. The nanosecond pulse near-field sensor emits an incident radar wave and receives a reflection radar wave of the incident radar wave hitting on a surface of the rotation element to obtain a repetition frequency variation of the reflection radar wave corresponding to the incident radar wave. The control unit calculates a vibration of the rotation element according to the repetition frequency variation.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: September 9, 2014
    Assignee: Industrial Technology Research Institute
    Inventors: Kuang-I Chang, Sheng-Hang Wang, Yu-Jen Su, Mu-Yu Tsai, Jyun-Long Chen
  • Patent number: 8823578
    Abstract: A driving assist apparatus for a vehicle is disclosed. The driving assist apparatus includes a transmitter for transmitting a transmission wave, a receiver for receiving a reflected wave, an obstacle presence determination section for detecting a presence of an obstacle in the surrounding of the vehicle based on the reflected wave, a measurement section for measuring a frequency of phase delay and advance of the reflected wave with respect to a reference signal, and a detection section for detecting the obstacle having a specific relation with the vehicle based on the presence of the obstacle determined by the obstacle presence determination section and the frequency of delay and the frequency of advance measured by the measurement section.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: September 2, 2014
    Assignees: Denso Corporation, Nippon Soken, Inc.
    Inventors: Toshihiro Hattori, Mitsuyasu Matsuura
  • Patent number: 8816896
    Abstract: System and method for calculating three dimensional residual motion errors of a moving platform with respect to a point of interest by receiving a radar signal from the point of interest (302); forming a radar image including a plurality of scatterers (304); using an MLE method to obtain range, radial velocity and acceleration of the moving platform for a first peak scatterer in the radar image (306); correcting a location of the first peak scatterer with respect to a scene center of the point of interest (312); updating the obtained radial acceleration responsive to the corrected location (314); and updating the obtained radial velocity of the moving platform responsive to the updated radial acceleration (316).
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: August 26, 2014
    Assignee: Raytheon Company
    Inventors: Theagenis J. Abatzoglou, Johan E. Gonzalez, Joel K. McWilliams, Raymond Samaniego
  • Patent number: 8581776
    Abstract: Provided is a radar system which calculates a track of a detected object and can determine whether or not the track is accurate. The radar system includes: a radar section for emitting an electromagnetic wave to an object and receiving a reflected wave reflected from the object to detect position information of the object; a track calculation section for calculating, periodically at a first cycle, a track along which the object moves, on the basis of the position information obtained from the radar section; a first speed calculation section for calculating a first speed at which the object moves, on the basis of pieces of the position information at two different time points having a time interval which is longer than the first cycle; and a track determination section for determining whether or not the track is accurate, on the basis of at least the first speed.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: November 12, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Jun Tsunekawa
  • Patent number: 8543281
    Abstract: A method of determining an angular velocity of an aircraft includes measuring the angular velocity using at least one gyro delivering a measured angular velocity signal affected by stochastic noise; measuring the angular acceleration of the aircraft using at least one accelerometer delivering a signal representing the angular acceleration of the aircraft; and using a filtering complementary in a frequency domain to combine a sum of the measured angular velocity signal and the angular acceleration signal so as to obtain a hybrid estimated angular velocity signal with reduced stochastic noise.
    Type: Grant
    Filed: June 9, 2008
    Date of Patent: September 24, 2013
    Assignee: Eurocopter
    Inventors: Jean-Paul Petillon, Marc Salesse-Lavergne
  • Patent number: 8471705
    Abstract: A multifunction detector for detecting energy reflected from the surface, the detector comprising: a focal plane array in communication with the optical receiving path; and an optical receiving path; a read-only integrated circuit in communication with the optical receiving path, integrated with a focal plane array; and a processor programmed to operate the focal plane array and read-out integrated circuit in a first mode to process signals in a first frequency band, and in a second mode to process signals in a second, wider frequency band.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: June 25, 2013
    Assignee: Lockheed Martin Corporation
    Inventors: William Yenisch, Richard LeBlanc
  • Patent number: 8384586
    Abstract: A Mixer structure (210) for Doppler radar applications and a Doppler radar sensor (30) having an oscillator input port (LO) for output signals from an electric oscillator (32), having a radio frequency input port (RF) for output signals from receiving means (34), having an output port (IF) for an overall output intermediate signal produced in the mixer structure (210) and having two mixer branches (12a, 12b) each with a diode (18a, 18b). The mixer branches (12a, 12b) are connected to the oscillator input port (LO) and to the radio frequency input port (RF) in such a manner that intermediate signals (IF1, IF2), which are produced in these mixer branches (12a, 12b) and correspond to a Doppler shift between the oscillator signal and the radio frequency signal, are processed to the overall output signal.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: February 26, 2013
    Assignee: BEA SA
    Inventor: Yves Borlez
  • Patent number: 8149160
    Abstract: A non-contact, distance traveled measurement system (DTMS) to calculate speed and distance traveled by a vehicle over rails—more specifically, by trains traveling on standard railroad tracks. Preferably, a pair of short range (near field) microwave-based transmitters/sensors (transceivers) are mounted on the underside of the train and used to key on rail-bed features such as cross ties or tie plates. Preferred embodiments also include infrared sensors as a redundant channel that is less sensitive to moisture in the track bed. Data from the sensors is correlated to determine the time delay between the first and second sensors' passage over objects on the rail bed such as cross-ties or tie-plates. From this time delay, nearly instantaneous velocity can be computed at each given target such as a tie plate (metal target) or a tie (dielectric contrast target). Velocity versus time curves can be integrated over time to derive distance traveled.
    Type: Grant
    Filed: October 27, 2010
    Date of Patent: April 3, 2012
    Assignee: Systems and Materials Research Corporation
    Inventors: Alan V. Bray, Sean McNeal, Jesse McDaniel
  • Patent number: 8149158
    Abstract: A target object information estimating device embodied by an electronically agile radar sensor is mounted in a moving vehicle. The device has a unit outputting a radar wave every measuring period, receiving radar waves reflected from a target object through different transmission paths and calculating a distance to the object in each measuring period to detect the object, a unit tracking the object in a tracking term of measuring periods, a unit setting the distance changed with time as a null distance each time electric power of the received waves is reduced to a minimal value, and a unit producing an actual pattern of null points corresponding to the null distances, collating the actual pattern with modeled patterns corresponding to various heights and estimates the height of the object from the collation result as information about the object.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: April 3, 2012
    Assignee: DENSO CORPORATION
    Inventors: Yoshie Samukawa, Keiji Matsuoka, Kouji Shimizu
  • Patent number: 8089394
    Abstract: A field disturbance sensing system has an antenna, an oscillator producing a high-frequency signal, a first detector circuit, a second detector circuit, a combining network configured to couple the high-frequency signal to the antenna, and to couple the high-frequency signal and a reflected high-frequency signal to the first detector and to the second detector. An algebraic combining network sums a first detected signal having first detected high-frequency signal and a first detected reflected signal from the first detector circuit and a second detected signal having second detected high-frequency signal and a second detected reflected signal from the second detector circuit to produce a detected output signal. The first detected reflected signal is added to the second detected reflected signal and the first detected high-frequency signal is subtracted from the second detected high-frequency signal. A controller configured to convert the detected output signal to a speed between the antenna and a target.
    Type: Grant
    Filed: November 2, 2009
    Date of Patent: January 3, 2012
    Assignee: Invention Planet, LLC
    Inventors: Christopher E. Stewart, Grant E. Moulton, Steven H. Goody
  • Patent number: 8081105
    Abstract: An embodiment of the invention includes a step of transmitting an OFDM waveform including several frequency carrier signals transmitted simultaneously, the frequency carrier signals being coded in order to improve the Doppler response. An embodiment of the invention includes a step of receiving the echoed waveform from the target. The initial phase of each frequency carrier signal is recovered from the echoed waveform. The recovered initial phase of each frequency carrier signal is cyclically shifted in order to compensate for the Doppler effect and subsequently decoded. A compressed pulse is synthesized from the decoded initial phases.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: December 20, 2011
    Assignee: Thales Nederland B.V.
    Inventors: Recep Firat Tigrek, Wilhelmus Johannes De Heij
  • Patent number: 7982660
    Abstract: A measuring device , e.g., a measuring device for a motor vehicle, is for measuring a distance between the measuring device and at least one object and/or measuring a difference in speed between the measuring device and the at least one object. The measuring device includes an emitting apparatus for transmitting a transmission signal encompassing at least two sequences of signal portions, a first sequence of signal portions and a second sequence of signal portions with two respective temporally alternating signal portions. The frequency of at least two signal portions of a sequence of signal portions differs by one respective difference frequency, the difference frequency of the first sequence of signal portions being different from the difference frequency of the second sequence of signal portions.
    Type: Grant
    Filed: September 21, 2004
    Date of Patent: July 19, 2011
    Assignees: Volkswagen AG, S.M.S. Smart Microwave Sensors GmbH
    Inventors: Marc-Michael Meinecke, Ralph Mende, Marc Behrens, Thanh-Binh To
  • Publication number: 20110102242
    Abstract: The present invention includes a transmitter/receiver 20 that transmits/receives an FMCW based sweep signal, a velocity grouping unit 36 that performs grouping of a target for each velocity range by a velocity of the target calculated based on the sweep signal from the transmitter/receiver, and a correlation tracking unit 37 that performs correlation tracking for each velocity group which is grouped by the velocity grouping unit.
    Type: Application
    Filed: March 19, 2010
    Publication date: May 5, 2011
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Shinichi Takeya, Kazuaki Kawabata, Kazuki Oosuga, Takuji Yoshida, Tomohiro Yoshida, Masato Niwa, Hideto Goto
  • Patent number: 7928897
    Abstract: A radar device includes a transmission antenna and a reception antenna having a plurality of antenna elements. The radar device switches the antenna elements in synchronization with a modulation cycle, thereby obtaining a reception signal. At this time, the radar device obtains the reception signal by switching the antenna elements using a first measurement phase and a second measurement phase having different switching cycles as one set. The radar device calculates an azimuth sine value sin ?1 from the reception signal in the first measurement phase and also calculates an azimuth sinusoidal value sin ?2 from the reception signal in the second measurement phase. Then, the radar device calculates a relative velocity V from the azimuth sine value sin ?1, the azimuth sine value sin ?2, an interval time difference ?t between switching cycles, and an inter-antenna element spacing d.
    Type: Grant
    Filed: April 23, 2009
    Date of Patent: April 19, 2011
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Toru Ishii, Tetsu Nishimura
  • Patent number: 7843381
    Abstract: A radar device of FM pulse system, in which a pulsed radio wave with frequency modulated is transmitted or received, to calculate a distance to a target 203 and a relative velocity, comprising: range gate setting means 205 for determining a sampling timing every time a predetermined time period has passed from a transmission timing; sampling means 206 for making a sampling in a frequency up zone or frequency down zone in each range gate; and measurement time changing means 207 for setting a measurement data used as an input of Fourier transform based on sampling data obtained by the sampling means 206, and when letting a time period required to make a sampling of all measurement data a measurement time period, changing the measurement time period in each range gate. An optimum distance resolution and relative velocity resolution can be set based on the distance to a target.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: November 30, 2010
    Assignee: Mitsubishi Electric Corporation
    Inventor: Katsuji Matsuoka
  • Patent number: 7825850
    Abstract: It is proposed to use the gun barrel or launcher tube or the muzzle brake as a waveguide, which, however, is operated at a frequency that is below the cutoff frequency of the relevant waveguide mode. The transmit coupler excites the relevant waveguide mode. An oscillator generates the signal, which is then sent to the transmit coupler. The waveguide and the projectile form a system in which the electromagnetic field at the receive coupler is influenced by the position of the projectile. The characteristic change over time of the strength of the electromagnetic field at the location of the receive coupler that results from the change in the distance between the projectile and the receive coupler is measured and used to determine the muzzle velocity.
    Type: Grant
    Filed: December 10, 2007
    Date of Patent: November 2, 2010
    Assignee: Oerlikon Contraves AG
    Inventor: Henry Frick
  • Patent number: 7818127
    Abstract: A method and apparatus for at least semi-autonomously controlling a vehicle so as to avoid collisions are provided. A sensor is utilized to scan an area proximate the vehicle for a potential object of collision. The apparatus calculates navigational states of the potential object of collision relative to the vehicle to determine that the vehicle is on a course to enter within a predetermined miss distance relative to the potential object of collision. The apparatus alters the course of the vehicle based on the calculated navigational states.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: October 19, 2010
    Assignee: Geneva Aerospace, Inc.
    Inventors: David S. Duggan, David A. Felio, Craig S. Askew
  • Patent number: 7804440
    Abstract: A GPS enabled radar detector dynamically handles radar sources based upon previously stored geographically referenced information on such sources and data from the GPS receiver. The detector includes technology for determining the location of the detector, and comparing this location to the locations of known stationary sources, to improve the handling of such detections. The detector may ignore detections received in an area known to contain a stationary source, or may only ignore specific frequencies or may handle frequencies differently based upon historic trends of spurious police radar signals at each frequency. Notification of the driver will take on a variety of forms depending on the stored information, current operating modes, and vehicle speed.
    Type: Grant
    Filed: June 20, 2007
    Date of Patent: September 28, 2010
    Assignee: Escort Inc.
    Inventor: Steven K. Orr
  • Patent number: 7791529
    Abstract: The invention relates to a method of determining an estimated speed of an aircraft relative to ground being overflown by the aircraft, in which use is made of the sum of an acceleration measurement of the aircraft plus a difference value, the difference value being obtained from observation data or signals relating to a region of the ground.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: September 7, 2010
    Assignee: Eurocopter
    Inventors: François Xavier Filias, Jean-Paul Petillon, Richard Pire
  • Patent number: 7688255
    Abstract: An electronic scanning radar apparatus has a cutting portion for cutting receiving data which is comprised of N numbers of data for each channel into two more short time data having M (<N) numbers of data in a time direction for each channel, an inverse matrix estimator for computing and estimating an inverse matrix of the time series correlation matrix from the short time data, and a phase information producing portion for computing CAPON phase information out of the estimated inverse matrix of the time series correlation matrix in order to detect a distance, an azimuth and a relative speed of a target on the basis of a computed CAPON phase information.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: March 30, 2010
    Assignee: Denso Corporation
    Inventors: Koichiro Suzuki, Chiharu Yamano, Gaku Takano, Kazuma Natsume
  • Patent number: 7667637
    Abstract: There is provided a radar system for detection of one or more objects. The radar system comprises a radar wave transmitter for simultaneously transmitting a CW radar signal and a FM-CW or MF radar signal, and a first radar wave receiver for receiving CW and FM-CW or MF radar signals, reflected from one or more objects present in a detection range of the radar system. The system may further comprise a first CW mixer for mixing CW transmission signals and reflected CW signals received by the first receiver, and a first FM-CW or MF mixer for mixing FM-CW or MF transmission signals and corresponding reflected FM-CW or MF signals received by the first receiver.
    Type: Grant
    Filed: April 5, 2005
    Date of Patent: February 23, 2010
    Assignee: Weibel Scientific A/S
    Inventors: Peder Richardt Pedersen, Fernando Casanova Galeano
  • Patent number: 7667598
    Abstract: A multifunction detector for detecting energy reflected from the surface, the detector comprising: a focal plane array in communication with the optical receiving path; and an optical receiving path; a read-only integrated circuit in communication with the optical receiving path, integrated with a focal plane array; and a processor programmed to operate the focal plane array and read-out integrated circuit in a first mode to process signals in a first frequency band, and in a second mode to process signals in a second, wider frequency band.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: February 23, 2010
    Assignee: Lockheed Martin Corporation
    Inventors: William Yenisch, Richard Leblanc
  • Patent number: 7649925
    Abstract: Time is transferred from an ultra wideband (UWB) transmitter to UWB receiver by transmitting a signal structure having an associated timing reference point together with a time value for the timing reference point. The UWB receiver receives the timing signal structure by synchronizing a receiver time base to the signal structure, demodulating the time value information, and using the demodulated time value information to set a receiver clock value. Propagation delay information is used to adjust the receiver clock value by advancing the receiver clock value to account for the propagation delay. In one embodiment, propagation delay is determined from a known distance between the transmitter and receiver. In another embodiment, the transmitter and receiver are part of a two-way link wherein propagation delay is measured by round trip timing measurements.
    Type: Grant
    Filed: May 28, 2005
    Date of Patent: January 19, 2010
    Assignee: Time Domain Corporation
    Inventors: Larry W. Fullerton, Mark Roberts, James Richards
  • Publication number: 20090309782
    Abstract: According to a conventional method of correlating beat frequencies in a radar device, a detecting state of a target differs at the time of up-chirping and at that of down-chirping, so that, when the number of peaks of beat frequencies does not match with each other, there occurs a situation in which the beat frequencies cannot be accurately correlated.
    Type: Application
    Filed: April 10, 2009
    Publication date: December 17, 2009
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yuuki Takabayashi, Hiroshi Kameda
  • Patent number: 7576679
    Abstract: A GPS enabled radar detector dynamically handles radar sources based upon previously stored geographically referenced information on such sources and data from the GPS receiver. The detector includes technology for determining the location of the detector, and comparing this location to the locations of known stationary sources, to improve the handling of such detections. The detector may ignore detections received in an area known to contain a stationary source, or may only ignore specific frequencies or may handle frequencies differently based upon historic trends of spurious police radar signals at each frequency. Notification of the driver will take on a variety of forms depending on the stored information, current operating modes, and vehicle speed.
    Type: Grant
    Filed: January 5, 2007
    Date of Patent: August 18, 2009
    Assignee: Escort Inc.
    Inventors: Steven K. Orr, Robert Gregory Blair, John Kuhn, Timothy A. Coomer
  • Patent number: 7567206
    Abstract: An integrated circuit for measuring the distance and/or velocity of objects, having: a high-frequency signal generating device for generating a first HF signal having a predefined frequency and a predefined modulation curve from at least one LF signal; a diplex/mixing device, which is coupled to the high-frequency signal generating device for determining a frequency offset between the first HF signal and a reflected second HF signal; a transceiver device, which is coupled to the diplex/mixing device, for sending the first HF signal and simultaneously receiving the reflected second HF signal, which is a function of a predefined modulation curve of the first HF signal and a distance to a reflecting object; and an adapter device, which is coupled between the diplex/mixing device and the transceiver device, for adapting the impedance of the transceiver device as a function of the frequency of the first HF signal.
    Type: Grant
    Filed: November 29, 2004
    Date of Patent: July 28, 2009
    Assignee: Robert Bosch GmbH
    Inventors: Ewald Schmidt, Klaus Voigtlaender
  • Patent number: 7498972
    Abstract: An obstacle detection system determines a probability distribution of existence of an obstacle object corresponding to a distance in an irradiation direction of a transmission wave based on detected strength data per scanning-angle supplied from a radar device. A peak-value of the strength data becomes a maximum probability of existence of the obstacle. The probability distribution has a range gradually decreasing before and after the peak-value. Even if the position indicated by the maximum probability of existence of the obstacle object is different from an actual distance to the obstacle object, it hardly occurs that the probability of existence at an actual position of the obstacle object becomes zero. This eliminates occurrence of separation/association errors. Primary and secondary existence probability relationships made based on the probability distribution are combined. Using the combined one further decreases the error detection.
    Type: Grant
    Filed: June 7, 2007
    Date of Patent: March 3, 2009
    Assignee: DENSO CORPORATION
    Inventor: Hideaki Tanaka
  • Patent number: 7474255
    Abstract: The present invention relates to a target tracking method of radar with frequency modulated continuous wave, which transmits a transmitted signal to receive a return wave of the transmitted signal that is used for detecting the target and obtaining the relative distance between the target and the radar. The target tracking method includes transmitting a frequency modulated continuous wave and receiving the reflected wave; getting a reflected wave corresponding to the target by detecting the reflected wave; getting a range gate error by seeking the plurality of the range gates corresponding to the reflected wave; and getting a position and a speed of the target at next time by knowing the position of the target at present time basis of the range gate error. Hence, the relative distance between the radar and the target is got.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: January 6, 2009
    Assignee: Chung Shan Institute of Science and Technology, Armaments Bureau, M.N.D.
    Inventors: Hung-Tao Hsieh, Feng-Ling Liu, Yao-Hwa Wen
  • Patent number: 7463181
    Abstract: In a method for suppressing interferences while detecting objects in a target area, a transmitter transmits a sequence of pulses into the target area, and a receiver detects the resulting reflection signal of the pulses reflected from the objects, within successive time windows that are referenced to the moment of transmitting an individual pulse and thus represent distance gates. The time spacing between the successive individual pulses is variable and randomized according to the pseudo-noise principle within predetermined limits, and the time windows are adapted accordingly. The received reflection signal may be sampled, digitized, digitally pre-processed and digitally filtered in the individual distance gates. A non-linear digital filter, preferably a sliding median filter, is used for the filtering to suppress transient disturbances. The median is determined from an odd number of consecutive sampled values of a reflection signal detected within a distance gate.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: December 9, 2008
    Assignee: A.D.C. Automotive Distance Control Systems GmbH
    Inventor: Markus Wintermantel
  • Patent number: 7425917
    Abstract: A radar including a target measurement component, a differential velocity calculator and an overall velocity determination portion. The target measurement component transmits and receives an electromagnetic wave over a detection range repeatedly at measurement intervals to measure a position of a target in the detection range and measure a Doppler velocity of the target based on a Doppler shift of the electromagnetic wave reflected from the target. The differential velocity calculator determines a differential velocity of the target based on a change in position of the target during consecutive measurement intervals. The overall velocity determination portion determines a current overall velocity by calculating a weighted average of the Doppler velocity, the differential velocity, and a previously determined overall velocity.
    Type: Grant
    Filed: January 5, 2007
    Date of Patent: September 16, 2008
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Motoi Nakanishi, Toru Ishii
  • Patent number: 7375802
    Abstract: An entangled quantum particle generator generates a signal including a plurality of entangled particles. The wavelength of the signal is the sum of the wavelengths of the entangled particles. A signal processor determines a characteristic of the target based on information derived from at least some of the entangled particles in the return signal. The frequency of the signal is selected to propagate the signal through a medium and the frequencies of the entangled particles are selected to provide sufficient data in the return signal to resolve the characteristic of the target.
    Type: Grant
    Filed: August 4, 2005
    Date of Patent: May 20, 2008
    Assignee: Lockheed Martin Corporation
    Inventors: Edward H. Allen, Markos Karageorgis
  • Patent number: 7359713
    Abstract: Systems and methods are disclosed to provide power management for a mobile communication device having a location determination function. The frequency of the location determination function may be adjusted based on whether the mobile communication device is moving and may be further adjusted based on battery voltage or expected battery life.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: April 15, 2008
    Assignee: Trimble Navigation Limited
    Inventor: Anil Tiwari
  • Patent number: 7333185
    Abstract: There is provided an optical velocimeter for achieving miniaturization and lower power consumption thereof and for accurately detecting two-dimensional travel velocity of a measured object. This optical velocimeter includes a light-emitting element, a diffraction grating, two light-receiving sections, and a signal processing circuit. Light emitted from the light-emitting element is branched by the diffraction grating into three light fluxes, and optical axes of the divided light fluxes are intersected one another on the measured object to form one detection point. Scattered light from the detection point frequency-shifted by travel of the measured object is then received by the two light-receiving sections, and a light-reception signals outputted from the light-receiving sections are processed in the signal processing circuit to detect travel velocities of two directions of the measured object.
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: February 19, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hideo Wada, Hisakazu Sugiyama, Takayuki Taminaga, Hajime Kashida
  • Patent number: 7205932
    Abstract: An improved system is provided for aiming a shotgun-based or other countermeasure system so as to be able to countermeasure incoming rockets or projectiles. In one embodiment a shotgun aimed and controlled by the subject system projects a pattern of pellets to intercept a rocket-propelled grenade or incoming projectile. The fire control system uses a CW two-tone monopulse radar to derive range and angle of arrival within 150 milliseconds, with range and angle of arrival measurements having approximately twice the accuracy of prior CW two-tone monopulse radars. The improvement derives from using all of the information in the returned radar beams and is the result of the recognition that one can use the Sum and Difference signals to assemble a two-by-two Rank One matrix that permits using singular value decomposition techniques to generate range and angle of arrival matrices in which all available information is used and in which noise is eliminated.
    Type: Grant
    Filed: October 1, 2004
    Date of Patent: April 17, 2007
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventor: Paul D. Fiore
  • Patent number: 7190306
    Abstract: The invention relates to a method for detecting the passage by a vehicle of a determined point for monitoring on a road, wherein from a remotely situated location a radar beam is transmitted continuously to the point for monitoring, reflections from the transmitted radar beam are received at the remotely situated location, and it is determined from the received reflections that the vehicle is passing the point for monitoring. The radar beam can herein be transmitted at an acute angle to the travel direction of the passing vehicle. The detection can be used to activate a red-light camera, to measure the speed of the vehicle or measure the traffic intensity, without sensors, for instance induction loops, having to be arranged in the road for this purpose.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: March 13, 2007
    Assignee: Gatsometer B.V.
    Inventor: Theodorus Maria Janssen
  • Patent number: 7030806
    Abstract: A time domain communications system wherein a broadband of time-spaced signals, essentially monocycle-like signals, are derived from applying stepped-in-amplitude signals to a broadband antenna, in this case, a reverse bicone antenna. When received, the thus transmitted signals are multiplied by a D.C. replica of each transmitted signal, and thereafter, they are, successively, short time and long time integrated to achieve detection.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: April 18, 2006
    Assignee: Time Domain Corporation
    Inventor: Larry W. Fullerton
  • Patent number: 6982668
    Abstract: Radar systems use time delay measurements between a transmitted signal and its echo to calculate range to a target. Ranges that change with time cause a Doppler offset in phase and frequency of the echo. Consequently, the closing velocity between target and radar can be measured by measuring the Doppler offset of the echo. The closing velocity is also known as radial velocity, or line-of-sight velocity. Doppler frequency is measured in a pulse-Doppler radar as a linear phase shift over a set of radar pulses during some Coherent Processing Interval (CPI). An Interferometric Moving Target Indicator (MTI) radar can be used to measure the tangential velocity component of a moving target. Multiple baselines, along with the conventional radial velocity measurement, allow estimating the true 3-D velocity of a target.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: January 3, 2006
    Assignee: Sandia Corporation
    Inventors: Armin W. Doerry, Brian P. Mileshosky, Douglas L. Bickel
  • Patent number: 6831595
    Abstract: Disclosed is a radar apparatus equipped with a function for detecting an abnormality of modulation width. Distance rt2 at time t2 is calculated from the values of the distance Rt1 and the relative velocity Vt1 measured at time t1 and the elapsed time t2−t1, and the difference relative to the actual measured value Rt2 is compared with a threshold value C1. If the difference relative to the actual measured value exceeds the threshold value C1, the modulation width is judged to be abnormal.
    Type: Grant
    Filed: March 3, 2004
    Date of Patent: December 14, 2004
    Assignee: Fujitsu Ten Limited
    Inventor: Osamu Isaji
  • Patent number: 6798374
    Abstract: Disclosed is a Doppler shifted radar apparatus for correct target identification with respect to surveillance of moving vehicles. More particularly, an improved radar detection system using two or more continuously transmitted frequencies is used. The multiple frequencies are directed toward target vehicles whereby the phase difference of the two or more reflected Doppler signals is calculated and subsequently used to accurately determine a target range, thereby displaying the closest vehicle and closest vehicle speed. Vehicle speed is determined with use of the standard Doppler frequency shift. The next closest and/or next faster vehicle speed can also be easily determined.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: September 28, 2004
    Assignee: Decatur Electronics Inc.
    Inventor: Kimble Jon Smith