With Pulse Modulation Patents (Class 342/134)
  • Patent number: 11372090
    Abstract: In one embodiment, a LIDAR device of an autonomous driving vehicle (ADV) includes a light emitter to emit a light beam towards a target, wherein at least a portion of the light beam is reflected from the target. The LIDAR device further includes an optical sensing unit including a first photodetector and a second photodetector. The first photodetector is a different type of photodetector from the second photodetector, where the optical sensing unit is to receive the portion of the light beam reflected from the target. When the optical sensing unit receives the portion of the light beam, the first photodetector generates a first optical sensor output signal and the second photodetector generates a second optical sensor output signal. The LIDAR device further includes a first circuitry portion to generate an intensity signal indicative of an intensity of the received portion of the light beam responsive to the first optical sensor output signal.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: June 28, 2022
    Assignee: BAIDU USA LLC
    Inventors: Tianjia Sun, Yaoming Shen, Xiangfei Zhou, Yang Han
  • Patent number: 11335538
    Abstract: The invention relates to a filter unit for filtering multiple pulse signals comprising a number of filter circuits, which are connected in parallel. Each filter circuit comprises an input and an output, wherein the input is configured to receive an amplitude of an input signal and the output is configured to activate an output signal. Each filter circuit has an allocated filter level and further comprises a pulse level detection circuit configured to detect a change of state of a pulse level of the input signal. The change of state comprises a transition from a first pulse level to a second pulse level and if the pulse level corresponds to the allocated filter level of the filter circuit the output of said filter circuit is activated.
    Type: Grant
    Filed: July 23, 2020
    Date of Patent: May 17, 2022
    Assignee: COMET AG PLASMA CONTROL TECHNOLOGIES
    Inventors: Manuel vor dem Brocke, Roland Schlierf
  • Patent number: 11280886
    Abstract: Systems, apparatus, articles of manufacture, and methods to reduce a scan for identifying physical objects are disclosed. An example system includes a light source to broadcast a light signal, a window adjuster to set a scan parameter for the light signal, and a transceiver to receive communication indicative of a physical position of a mobile unit. In the example system, the window adjuster is to adjust the scan parameter based on the physical position.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: March 22, 2022
    Assignee: Intel Corporation
    Inventors: Sean J. Lawrence, Arvind S
  • Patent number: 11181616
    Abstract: In some examples, a radar system includes first direct digital synthesizer (DDS) circuitry and first phase-locked loop (PLL) circuitry configured to generate a first sinusoidal signal based on a first DDS signal generated by the first DDS circuitry. In some examples, the radar system further includes transmitter circuitry configured to generate a radar signal based on the first sinusoidal signal. In some examples, the radar system also includes one or more antennas configured to transmit the radar signal and receive a return signal based on the radar signal. In some examples, the radar system includes second DDS circuitry, second PLL circuitry configured to generate a second sinusoidal signal based on a second DDS signal generated by the second DDS circuitry, and receiver circuitry configured to process the return signal based on the second sinusoidal signal.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: November 23, 2021
    Assignee: Honeywell International Inc.
    Inventors: David C. Vacanti, Marc M. Pos
  • Patent number: 10908272
    Abstract: A radar sensing system for a vehicle includes a transmitter configured for installation and use on a vehicle and able to transmit radio signals. The radar sensing system also includes a receiver and a processor. The receiver is configured for installation and use on the vehicle and is able to receive radio signals that include transmitted radio signals reflected from objects in the environment. The processor samples the received radio signals to produce a sampled stream. The processor processes the sampled stream such that the sampled stream is correlated with various delayed versions of a baseband signal. The correlations are used to determine an improved range, velocity, and angle of targets in the environment.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: February 2, 2021
    Assignee: Uhnder, Inc.
    Inventors: Raghunath K. Rao, Curtis Davis, Monier Maher, Steve Borho, Nikhilesh Bhagat, Jean P. Bordes
  • Patent number: 10823833
    Abstract: A controller for a FMCW radar system configured to: provide for emission by the FMCW radar system of a plurality of consecutive frequency modulated detection signals for detection and ranging, each of the frequency modulated detection signals varying between an initial frequency and a final frequency over a period of time extending from a start time to an end time; wherein at least one of said consecutive frequency modulated detection signals is provided with an offset to one or more of; the start time of the detection signal relative to a predetermined start time schedule; the end time of the detection signal relative to a predetermined end time schedule; the initial frequency of the detection signal relative to a predetermined initial frequency schedule; and the final frequency of the detection signal relative to a predetermined final frequency schedule; the offset based on a random value.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: November 3, 2020
    Assignee: NXP B.V.
    Inventor: Ralf Reuter
  • Patent number: 10670397
    Abstract: Provided is a distance measuring device and a method of measuring a distance. The distance measuring device detects light reflected by an object, generates an electrical signal based on the detected light, detects whether the electrical signal is saturated or not by comparing the electrical signal with a reference value, controls a magnitude of the electrical signal based on whether the signal is saturated, and calculates a distance to the object using the electrical signal.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: June 2, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Tatsuhiro Otsuka, Jungwoo Kim, Heesun Yoon, Inoh Hwang
  • Patent number: 10637530
    Abstract: Space-time-frequency multiplexing (STFM) schemes for radio frequency (RF) scanning are disclosed in which complementary pairs of sequences (or “Golay pairs”) are transmitted at different times using multiple frequencies. The transmission and reception of the sequences can occur over multiple transmit (Tx) and/or receive (Rx) radio sectors to scan an entire area for range, azimuth, elevation, and (optionally) velocity of objects therein.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: April 28, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Evgeny Levitan, Evyatar Hemo, Simha Sorin, Ariel Yaakov Sagi
  • Patent number: 10605919
    Abstract: A method for processing echo pulses of an active 3D sensor to provide distance measurements of surroundings in front of the active 3D sensor includes defining a near range distance from the active 3D sensor and defining a last echo distance from the active 3D sensor greater than said defined near range distance. The method includes receiving a sequence of echo pulses of a signal emitted by the active 3D sensor and subjecting the sequence of echo pulses to a pre-defined trigger condition such that only those echo pulses are taken into consideration which fulfill the predefined trigger condition. The method also includes determining, from the echo pulses which fulfill the predefined trigger condition and that are received from distances greater than a defined near range distance, a first echo pulse and an adaptive echo pulse, and providing distance measurements of the surroundings in front of the 3D sensor using the determined first echo pulse and the determined adaptive echo pulse.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: March 31, 2020
    Assignee: Hensoldt Sensors GmbH
    Inventors: Patrick Kramper, Thomas Muensterer
  • Patent number: 10416018
    Abstract: A pulse running time filling level sensor includes a sampling device for sampling an IF signal at discrete instants and for converting the sampling values into digital sampling values, and a digital signal processing device for subsequent processing of the digital sampling values by calculating at least one new value characterizing the IF curve from respectively exactly two digital sampling values.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: September 17, 2019
    Assignee: VEGA GRIESHABER KG
    Inventors: Karl Griessbaum, Josef Fehrenbach, Roland Welle, Juergen Haas
  • Patent number: 10295653
    Abstract: One embodiment of the invention includes moving target indication (MTI) system. The system includes an MTI data processor configured to receive time-sampled location indicators associated with an approximate location of a moving target in a geographic scene of interest and to generate a moving target indicator associated with the moving target based on the time-sampled location indicators. The system also includes an image integrator configured to receive the moving target indicator associated with the moving target, to receive geography data associated with the geographic scene of interest, and to integrate the moving target indicator into the geography data as a three-dimensional moving target indicator at an approximate geographic location of the moving target.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: May 21, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Dale E. Burton, Stephen B. Duke, Erich Mirabal, Steven J. Wheeler
  • Patent number: 10033760
    Abstract: Embodiments for securely determining a separation distance between wireless communication devices is provided. These embodiments include receiving a measurement request and a first random identifier from a first wireless communication device at a second wireless communication device. The embodiments also includes deriving a transient key using the first random identifier, a second random identifier (generated by the second device), and a pre-shared key. The first and second random identifiers, the pre-shared key, and the transient key derived therefrom are shared between the first and second devices, but are not known to any other devices. The embodiments further include encrypting measurement data exchanged between the two devices using the transient key, and using the encrypted measurement data to calculate and verify a separation distance between the devices.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: July 24, 2018
    Assignee: Apple Inc.
    Inventors: Kapil Chhabra, Welly Kasten
  • Patent number: 9945934
    Abstract: A device comprising: a housing mountable on a back surface of a handheld electronic device; a radar coupled with the housing, the radar comprising: (a) a receiver unit comprising at least one receiving antenna element; (b) a transmitter unit comprising at least one transmitting antenna element; an integrated circuit (IC) module; and an interface unit configured to operatively couple the radar with the handheld electronic device.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: April 17, 2018
    Assignee: International Business Machines Corporation
    Inventors: Dan Corcos, Danny Elad
  • Patent number: 9897690
    Abstract: A technique for a pulse/phase based laser rangefinding instrument utilizing a single photodiode in conjunction with separate pulse and phase receiver circuits. The photodiode receives phase and pulse ranging signals and a capacitor coupled to the photodiode and is operative to provide current through the photodiode to a transimpedance amplifier in a pulse mode of operation and from the photodiode through a tuned circuit to a narrow band amplifier in a phase mode of operation.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: February 20, 2018
    Assignees: LASER TECHNOLOGY, INC., KAMA-TECH (HK) LIMITED
    Inventor: Jeremy G. Dunne
  • Patent number: 9709663
    Abstract: A system and method for location of objects in 2-dimensional and 3-dimensional space using a minimum number of timed RF transmissions. System consists of a mobile device and a plurality of surveyed anchors. Two-Way Ranging (TWR) is done between the tag and any single anchor and the distance between the tag and remaining anchors is determined through listening to, or snooping, the TWR packet transmissions.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: July 18, 2017
    Assignee: Ciholas, Inc.
    Inventors: Mike Ciholas, Justin E Bennett, Daniel L Morris
  • Patent number: 9593976
    Abstract: The present invention relates to a pulsed level gauge system comprising frequency control circuitry. If an acquired signal indicates that the time between the previous filling level determination and the present filling level determination is shorter than a predefined time, the frequency control circuitry controls at least one of a transmit signal generating circuitry and a reference signal generating circuitry comprised in the pulsed level gauge system using previous frequency control settings stored in memory.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: March 14, 2017
    Assignee: Rosemount Tank Radar AB
    Inventors: Leif Nilsson, Hakan Delin, Hakan Nyberg
  • Patent number: 9319098
    Abstract: A method of securely communicating a data chirp signal from a transmitter to a receiver, the chirp signal comprising at least one symbol, each symbol comprising one or more identical chirps, each chirp encoding a symbol value, the method comprising: negotiating between the transmitter and the receiver encryption parameters of the chirp signal, the encryption parameters defining at least one property of each symbol of the chirp signal; at the transmitter, encrypting the chirp signal as negotiated; at the transmitter, encoding data in the chirp signal via the symbol value of each chirp; and transmitting the encrypted and encoded chirp signal from the transmitter to the receiver.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: April 19, 2016
    Assignee: Qualcomm Technologies International, Ltd.
    Inventor: Paul Dominic Hiscock
  • Patent number: 9035824
    Abstract: A system and method of radar location comprises radar signal emission means, an emitted pulse of duration T1 and index i starting at instant T2(i); means receiving reflected radar signals; means determining correlation between reconstruction of an emitted pulse and signal received during the time interval between T2(i)+2*T1 and T2(i+1). The means determining a correlation can reconstruct a set, of at least one truncated pulse j of duration T3(j), less than T1, corresponding to the final part of said emitted pulse, said truncated pulses having increasing respective durations, determining at least one first correlated signal j by correlation of said truncated pulse j and signal received during time interval between T2(i)+T1 and T2(i)+T1+T3(j) and determining a second signal, based on first correlated signals j, by copying the time interval, of said correlated signal j, between T2(i)+T1+T3(j) and T2(i)+T1+T3(j+1), onto the time interval, of said second signal, between T2(i)+T1+T3(j) and T2(i)+T1+T3(j+1).
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: May 19, 2015
    Assignee: Thales
    Inventors: Stéphane Kemkemian, Jean-Paul Artis, Jean-Michel Quellec
  • Patent number: 9024810
    Abstract: A method and apparatus for ranging finding of signal transmitting devices is provided. The method of signal reception is digitally based only and does not require receivers that are analog measurement devices. Ranging can be achieved using a single pulse emitting device operating in range spaced relation with a minimum of a single signal transmitter and a single digital receiver and processing circuitry. In general a plurality of transmitting pulsed emitters may be ranged and positioned virtually simultaneously in 3-dimensions (XYZ coordinates) using a configuration of a plurality of digital receivers arranged in any fixed 3-dimensional configuration. Applications may involve at least one single transmitter to receiver design to determine range, or at least one transmitted reflecting signal off from an object to determine range.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: May 5, 2015
    Assignee: XYZ Interactive Technologies Inc.
    Inventor: Andrew H. Lohbihler
  • Patent number: 9024816
    Abstract: A radar or sonar system amplifies the signal received by an antenna of the radar system or a transducer of the sonar system is amplified and then subject to linear demodulation by a linear receiver. There may be an anti-aliasing filter and an analog-to-digital converter between the amplifier and the linear receiver. The system may also have a digital signal processor with a network stack running in the processor. That processor may also have a network interface media access controller, where the system operates at different ranges, the modulator may produce pulses of two pulse patterns differing in pulse duration and inter-pulse spacing, those pulse patterns are introduced and used to form two radar images with the two images being derived from data acquired in a duration not more than twenty times larger than the larger inter-pulse spacing, or for a radar system, larger than one half of the antenna resolution time. One or more look-up tables may be used to control the amplifier.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: May 5, 2015
    Assignee: Raymarine UK Limited
    Inventors: Richard Jales, Andrew Lawrence, Matthieu Maindrou
  • Patent number: 9000974
    Abstract: Systems and methods for allowing dual-mode radar operation. An exemplary transmission system includes a hybrid coupler that receives a signal produced by a synthesizer and couples the received signal to two output ports. A pulse transmitter receives a pulse transmit-activate signal from a controller, receives an input signal from the hybrid coupler and, if the activate signal has been received, amplifies the received signal based on a predefined desired pulse output transmission setting. A frequency-modulation continuous-wave (FMCW) transmitter receives an FMCW transmit-activate signal from the controller, receives an input signal from the hybrid coupler and, if the activate signal has been received, amplifies the received input signal based on a predefined desired FMCW output transmission setting. An isolator protects the pulse transmitter during FMCW operation and also the FMCW transmitter from receiving power reflected off of pulse transmitter components.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: April 7, 2015
    Assignee: Honeywell International Inc.
    Inventor: David C. Vacanti
  • Patent number: 8982831
    Abstract: Data packets are transmitted from a terminal of a broadband radio communication system. For each transmission cycle in a transmission period data is received at a data interface of the terminal and buffered, and transmission of radio signals comprising the received data is enabled on expiry of a repetition interval from the start of a previous transmission. The repetition intervals are controlled to reduce a proportion of the transmission period for which transmission may occur at an allowed pulse repetition interval of a radar with which the terminal may interfere. The presence of radar pulses is checked during a wait period for each cycle while the terminal is not transmitting. If radar pulses are present, the transmission of radio signals which may interfere with the radar pulses is inhibited.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: March 17, 2015
    Assignee: Cambium Networks Limited
    Inventors: Martin Richard Crowle, Jan Jerzy Cynk
  • Patent number: 8976060
    Abstract: Distance between two radio frequency devices is estimated by receiving a plurality of spread spectrum chirp signals frequency offset from one another, and evaluating the received plurality of spread spectrum chirp signals for relative phase shifts between the plurality of spread spectrum chirp signals. A fine propagation time is derived using the phase shifts between the spread spectrum chirp signals. A frequency domain despreading window is shifted to reduce the influence of time-delayed near multipath signals in receiving the plurality of spread spectrum chirp signals.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: March 10, 2015
    Assignee: Digi International Inc.
    Inventor: Terry M. Schaffner
  • 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
  • Patent number: 8902103
    Abstract: Disclosed is a radar apparatus supporting short range and long range radar operations, wherein a plurality of short range transmitting chirp signals and a plurality of long range transmitting chirp signals are generated by a predetermined modulation scheme and is transmitted to an object through at least one transmitting array antenna and signals reflected from the object is received through at least one receiving array antenna, and the plurality of long range transmitting chirp signals have transmission power larger than that for the plurality of short range transmitting chirp signals.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: December 2, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Cheon Soo Kim, Pil Jae Park, Min Park, Kyung Hwan Park, Dong-Young Kim, Jeong-Geun Kim, Bon Tae Koo, Hyun Kyu Yu
  • Patent number: 8872674
    Abstract: A method of using a directional sensor for the purposes of detecting the presence of a vehicle or an object within a zone of interest on a roadway or in a parking space. The method comprises the following steps: transmitting a microwave transmit pulse of less than 5 feet; radiating the transmitted pulse by a directional antenna system; receiving received pulses by an adjustable receive window; integrating or combining signals from multiple received pulses; amplifying and filtering the integrated receive signal; digitizing the combined signal; comparing the digitized signal to at least one preset or dynamically computed threshold values to determine the presence or absence of an object in the field of view of the sensor; and providing at least one pulse generator with rise and fall times of less than 3 ns each and capable of generating pulses less than 10 ns in duration.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: October 28, 2014
    Inventor: Balu Subramanya
  • 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
  • Publication number: 20140168005
    Abstract: A pulse radar ranging apparatus and a ranging algorithm thereof are provided. The pulse radar ranging apparatus includes a radio frequency pulse generator, a radio frequency filter, a radio frequency switch and a transceiver aerial. The radio frequency pulse generator generates a pulse signal. The radio frequency filter receives the pulse signal and generates a high-pass filter signal, wherein the high-pass filter signal includes a radio frequency pulse reference signal. The radio frequency switch controls an output of the radio frequency pulse reference signal. The transceiver aerial transmits the radio frequency pulse reference signal. The radio frequency pulse reference signal contacts an object and generates a return signal, and the transceiver aerial receives the return signal. The ranging algorithm processes and analyzes the signals obtained by the pulse radar ranging apparatus, and calculates a distance between pulse radar ranging apparatus and the object by using polynomial interpolation.
    Type: Application
    Filed: March 15, 2013
    Publication date: June 19, 2014
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventor: INDUSTRIAL TECHNOLOGY RESEARC INSTITUTE
  • Patent number: 8754806
    Abstract: A pulse radar receiver includes a power splitter configured to split a transmit (TX) trigger signal for generating a TX pulse, a phase-locked loop (PLL) configured to receive a division ratio and the TX trigger signal split by the power splitter, and generate a sampling frequency, and a sampler configured to sample a reflected wave received through an RX antenna, according to the sampling frequency generated by the PLL. Accordingly, it is possible to provide a high distance resolution by generating a sampling frequency with a difference from a TX pulse to sample a reflected wave received through an RX antenna. Thus, it is possible to overcome a limitation in the distance resolution due to the pulse width and to measure a minute movement at a short distance. Therefore, the pulse radar receiver is applicable to high range resolution radar applications such as a living body measuring radar.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: June 17, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Pil Jae Park, Seong Do Kim, Sung Chul Woo, Hyun Kyu Yu
  • Patent number: 8742979
    Abstract: This disclosure provides a range side lobe removal device, which includes a pulse compressor for acquiring a reception signal from a radar antenna and generating a pulse-compressed signal by performing a pulse compression of the reception signal, a pseudorange side lobe generator for generating a pseudo signal of range side lobes of the pulse-compressed signal based on the reception signal, and a signal remover for removing a component corresponding to the pseudo signal from the pulse-compressed signal.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: June 3, 2014
    Assignee: Furuno Electric Company Limited
    Inventor: Yoshifumi Ohnishi
  • Patent number: 8723723
    Abstract: A dual mode ground penetrating radar includes an enclosure which houses radar electronics. The dual mode ground penetrating radar includes a enclosure housing radar electronics. The dual mode ground penetrating radar further includes a first antenna feed having ferrite loading and extending outside of the enclosure. The dual mode ground penetrating radar further includes a second antenna feed spaced apart from the first antenna feed, the second antenna feed having ferrite loading and extending outside of the enclosure. An RF signal is provided in at least one of the first and second antenna feeds by the radar electronics.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: May 13, 2014
    Assignee: King Abdulaziz City for Science and Technology
    Inventors: Tariq A. Al-Khalefah, Khaled F. R. Almutairi, Per Arne Vincent Utsi
  • Patent number: 8723721
    Abstract: A multistatic radar surveillance system includes transmitter elements and receiver elements arranged according to a zone to be monitored, and a command and control unit that configures the elements and collects information relating to objects detected by the receiver elements. Each transmitter element transmits a signal, the bandwidth of which is substantially equal to the totality of a frequency band B allocated to the system. Each transmitter element transmits a common waveform to all of the transmitter elements, and the waveform is modulated by a binary signal specific to the element in question, this signal allowing each of the receiver elements receiving a signal to identify the transmitter element at the source of this signal. The coding applied to the waveform is defined so that the spread spectrum caused to the signal transmitted by the latter does not exceed the frequency band B allocated to the system.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: May 13, 2014
    Assignee: Thales
    Inventors: Michel Moruzzis, Daniel Muller, Jean-Marie Ferrier
  • Patent number: 8704703
    Abstract: Methods and systems for post processing synchronization of bistatic radar data are disclosed. A transmitter is configured to transmit pulses at a first rate controlled by a first local oscillator. A receiver is configured to receive pulses at a second rate controlled by a second oscillator. A processing device is configured to synchronize, with respect to the first rate, in-phase quadrature data received from the receiver using a keystone formatting technique.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: April 22, 2014
    Assignee: The MITRE Corporation
    Inventor: Probal Kumar Sanyal
  • Patent number: 8654006
    Abstract: An integrated circuit comprises frequency generation circuitry for controlling a frequency source for an automotive radar system. The frequency generation circuitry comprises a Phase Locked Loop (PLL) arranged to generate a control signal for controlling the frequency source, a fractional-N divider located within a feedback loop of the PLL, and frequency pattern control logic operably coupled to the fractional-N divider and arranged to control the fractional-N divider, by way of a frequency control signal, such that the PLL generates a Frequency Modulated Continuous Wave (FMCW) control signal.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: February 18, 2014
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Christophe Landez, Hugues Beaulaton, Thierry Cassagnes, Stephane Colomines, Robert G. Gach, Akbar Ghazinour, Hao Li, Gilles Montoriol, Didier Salle, Pierre Savary
  • Publication number: 20140022114
    Abstract: A pulse radar apparatus and a control method therefor are provided that can detect information about a target with a high degree of accuracy by allowing detection of target information at all times and updating a replica signal of a noise signal in order. When the number of sets of distance data n1 is determined to be more than the number of sets of all distance data Nr in step S5, it is determined that target information detection processing is finished, and replica signal generation processing is subsequently performed. The radar function is activated in steps S13, S15, S16, and the noise signal for each distance data is obtained in step S17. Thereafter, in steps S19, S21, S23, the first, second, and third background signals, respectively, are generated, and thereafter, in step S23, a replica signal is generated.
    Type: Application
    Filed: September 23, 2013
    Publication date: January 23, 2014
    Applicants: Furukawa Automotive Systems Inc., Furukawa Electric Co., Ltd.
    Inventors: Kazutaka KAMIMURA, Yasushi Aoyagi, Yoshihito Ishida
  • Patent number: 8624776
    Abstract: A radar or sonar system amplifies the signal received by an antenna of the radar system or a transducer of the sonar system is amplified and then subject to linear demodulation by a linear receiver. There may be an anti-aliasing filter and an analog-to-digital converter between the amplifier and the linear receiver. The system may also have a digital signal processor with a network stack running in the processor. That processor may also have a network interface media access controller, where the system operates at different ranges, the modulator may produce pulses of two pulse patterns differing in pulse duration and inter-pulse spacing, those pulse patterns are introduced and used to form two radar images with the two images being derived from data acquired in a duration not more than twenty times larger than the larger inter-pulse spacing, or for a radar system, larger than one half of the antenna resolution time. One or more look-up tables may be used to control the amplifier.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: January 7, 2014
    Assignee: Raymarine UK Limited
    Inventors: Richard Jales, Andrew Lawrence, Matthieu Maindrou
  • Publication number: 20130342383
    Abstract: An interference rejection device includes a change amount calculator, a detector, and a rejecter. The change amount calculator is configured to find change amounts in at least one of amplitude and phase of received signals of a plurality of sweeps in a distance direction between a first distance and a second distance. The detector is configured to detect radar interference occurring between the first distance and the second distance by comparing the change amounts calculated by the change amount calculator between the plurality of sweeps. The rejecter is configured to reduce the amplitude of the received signal corresponding to a position of the radar interference.
    Type: Application
    Filed: June 18, 2013
    Publication date: December 26, 2013
    Inventor: Tatsuya KOJIMA
  • Patent number: 8593338
    Abstract: A new approach to radar imaging is described herein, in which radar pulses are transmitted with an uneven sampling scheme and subsequently processed with novel algorithms to produce images of equivalent resolution and quality as standard images produced using standard synthetic aperture radar (SAR) waveforms and processing techniques. The radar data collected with these waveforms can be used to create many other useful products such as moving target indication (MTI) and high resolution terrain information (HRTI). The waveform and the correction algorithms described herein allow the algorithms of these other radar products to take advantage of the quality Doppler resolution.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: November 26, 2013
    Assignee: Areté Associates
    Inventors: Jeremy Francis Burri, Michael Howard Farris, Matthew Michael Pohlman, Randall Edward Potter
  • Publication number: 20130285848
    Abstract: An integrated radar system includes a processing module and a radar device. The radar device includes an antenna module, a configurable shaping module, and a configurable transceiver module. The processing module generates an outbound signal and a control signal to configure the integrated radar system. The configured transceiver module converts the outbound signal into an outbound wireless signal. The configured shaping module shapes the outbound wireless signal into a shaped signal. The antenna module transmits the shaped signal and then receives an inbound radar signal. The configured shaping module shapes the inbound radar signal into an inbound wireless signal. The configured transceiver module converts the inbound wireless signal into an inbound symbol stream. The processing module determines location information regarding an object based on the inbound symbol stream.
    Type: Application
    Filed: June 28, 2013
    Publication date: October 31, 2013
    Applicant: BROADCOM CORPORATION
    Inventors: Alfred Grau Besoli, Nicolaos G. Alexopoulos, Jesus Alfonso Castaneda
  • Patent number: 8547273
    Abstract: The invention provides a pulse radar apparatus, and a control method thereof, that permits to readily downsize and to lower its cost and allows information on an object to be detected in high precision by removing an influence of noise when a gain of a variable gain amplifier is discontinuously changed corresponding to detected distance, with a simple configuration. A variable gain amplifier 135 configured to adjust a gain corresponding to a distance gate is used to be able to detect weak reflected wave from a distant object and to amplify a reflected wave from a short distance with a low gain. An offset noise from the variable gain amplifier 135 is prepared together with interference noise and self-mixing noise in advance as a replica signal of unwanted wave and the replica signal is removed from a baseband signal in detecting the object T.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: October 1, 2013
    Assignees: Furukawa Electric Co., Ltd., Furukawa Automotive Systems Inc.
    Inventors: Yasushi Aoyagi, Kazutaka Kamimura, Yoshihito Ishida
  • Patent number: 8519885
    Abstract: A hand-held apparatus has a Doppler radar secured within one wall of a phone sleeve. A phone may be placed within the sleeve and in signal communication with the radar via a connector molded in the sleeve. In operation, an RF signal may be directed toward a distant moving target and a bounce signal received. The speed of the target is calculated from the Doppler frequency shift and displayed by the phone to the user.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: August 27, 2013
    Assignee: Mobile Joose, Inc.
    Inventors: Daniel R. Ash, Jr., Daniel R. Ash, Sr., Joseph Storniolo
  • Patent number: 8487810
    Abstract: An integrated radar system includes a processing module and a radar device. The radar device includes an antenna module, a configurable shaping module, and a configurable transceiver module. The processing module generates an outbound signal and a control signal to configure the integrated radar system. The configured transceiver module converts the outbound signal into an outbound wireless signal. The configured shaping module shapes the outbound wireless signal into a shaped signal. The antenna module transmits the shaped signal and then receives an inbound radar signal. The configured shaping module shapes the inbound radar signal into an inbound wireless signal. The configured transceiver module converts the inbound wireless signal into an inbound symbol stream. The processing module determines location information regarding an object based on the inbound symbol stream.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: July 16, 2013
    Assignee: Broadcom Corporation
    Inventors: Alfred Grau Besoli, Nicolaos G. Alexopoulos, Jesus Alfonso Castaneda
  • 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: 8432307
    Abstract: A radar device includes an antenna having at least two linear arrays of radiating elements being orthogonal to one another, a first array being used to focus a transmission beam in a first plane and a second beam being used to focus a reception beam in a second plane, orthogonal to the first plane. The focussing of the beam is obtained in the first plane by colored emission followed by a reception beam formation by computation, and in that the focussing of the beam is obtained in the second plane using reception beam formation by computation. The colored emission is carried out by combining antenna transmission sub-arrays in such a manner as to form a sum channel and a difference on reception channel according to the monopulse technique.
    Type: Grant
    Filed: September 14, 2010
    Date of Patent: April 30, 2013
    Assignee: Thales
    Inventors: Pascal Cornic, Patrick Le Bihan, Stéphane Kemkemian
  • Patent number: 8410976
    Abstract: An object ranging system operates by transmitting pulses derived from a frequency-swept signal and determining the beat frequency of a combination of the frequency-swept signal and its reflection from an object. A second (or higher) order harmonic is derived from the combination signal. Accordingly, determination of the beat frequency, and hence object range, is significantly enhanced. The frequency sweep is such that frequency changes occur at a substantially higher rate at the beginning of each the pulse repetition interval than at the end. Accordingly, because the frequency changes are concentrated in the period of pulse transmission, even reflections 'from a close object, where the time delay between the source signal and the reflection is very short, will cause a high beat frequency.
    Type: Grant
    Filed: October 24, 2006
    Date of Patent: April 2, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Jerzy Wieslaw Szajnowski, Paul Ratliff, Wojciech Machowski
  • Patent number: 8378878
    Abstract: A new approach to radar imaging is described herein, in which radar pulses are transmitted wi th an uneven sampling scheme and subsequently processed with novel algorithms to produce images of equivalent resolution and quality as standard images produced using standard synthetic aperture radar (SAR) waveforms and processing techniques. The radar data collected with these waveforms can be used to create many other useful products such as moving target indication (MTI) and high resolution terrain information (HRTI). The waveform and the correction algorithms described herein allow the algorithms of these other radar products to take advantage of the quality Doppler resolution.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: February 19, 2013
    Assignee: Areté Associates
    Inventors: Jeremy Francis Burri, Michael Howard Farris, Matthew Michael Pohlman, Randall Edward Potter
  • Patent number: 8362944
    Abstract: A radar system is disclosed for forming a scanning receive beam from signals received by a phased array having a plurality of sub arrays. An exemplary radar system includes a plurality of phase units each configured to receive a signal from one or more sub arrays. Each phase unit includes a waveform generator configured to generate an analog waveform having a frequency corresponding to a time-varying phase shift. Each waveform generator is arranged to digitally generate the analog waveform, and output a comparison of the received signal with the waveform, incorporating the time-varying phase shift. The system further includes a combining unit configured to combine the outputs from the plurality of phase units to form a scanning receive beam.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: January 29, 2013
    Assignee: Astrium Limited
    Inventor: David Charles Lancashire
  • Patent number: 8351483
    Abstract: Provided are transmitter topology, receiver topology and methods for generating and transmitting a radio signal at a transmitter and detecting and processing a radio signal at a receiver. The radio signals are transmitted across a wireless interface using Ultra Wideband (UWB) pulses. A transmitted reference approach is utilized. The radio signal include pairs of UWB pulses with each pair of pulses separated by a fixed time delay. The two pulses are then combined to provide for improved noise immunity.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: January 8, 2013
    Assignee: University of South Florida
    Inventor: James L. Tucker
  • Publication number: 20120262332
    Abstract: This disclosure provides a range side lobe removal device, which includes a pulse compressor for acquiring a reception signal from a radar antenna and generating a pulse-compressed signal by performing a pulse compression of the reception signal, a pseudorange side lobe generator for generating a pseudo signal of range side lobes of the pulse-compressed signal based on the reception signal, and a signal remover for removing a component corresponding to the pseudo signal from the pulse-compressed signal.
    Type: Application
    Filed: April 11, 2012
    Publication date: October 18, 2012
    Inventor: Yoshifumi OHNISHI