Complex Signal (in Phase And Quadrature) Patents (Class 342/194)
  • Patent number: 11949488
    Abstract: A method and device for realizing beam alignment are disclosed. The method may include: when first signals are received by two analog subarrays having a same polarization using receiving beams with a same beam direction, acquiring the first signals and the phase center difference therebetween; maintaining the beam direction, changing the phase center difference between the two analog sub-arrays for the first time, and acquiring second signals and the first changed phase center difference; maintaining the beam direction, changing the phase center difference for the second time, and acquiring third signals and the second changed phase center difference; and estimating a DOA of a received signal according to the obtained information, and directing the centers of the receiving beams to the estimated DOA.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: April 2, 2024
    Assignee: ZTE CORPORATION
    Inventor: Xiaojiang Guo
  • Patent number: 11921522
    Abstract: This disclosure is directed to sub-meter level navigation accuracy for Unmanned Aerial Vehicles (UAVs) using broadband communication signals, such as cellular long-term evolution (LTE) signals. A framework and methods are provided using a receiver and controller to produce at least one of carrier phase, code phase, and Doppler frequency measurements from received LTE signals. Single difference measurements may be used to remove clock bias. LTE ENodeB clock biases are initialized using the known initial position of the UAV. The measurements are fused via an extended Kalman filter (EKF) to estimate the UAV position and integer ambiguities of the carrier phase single difference measurements. LTE signals can have different carrier frequencies and conventional algorithms do not estimate the integer ambiguities. Processes are described to detect cycle slip, where the carrier phase measurements from the LTE eNodeB multiple antenna ports are used to detect cycle slip.
    Type: Grant
    Filed: November 3, 2020
    Date of Patent: March 5, 2024
    Assignee: The Regents of the University of California
    Inventors: Zak Kassas, Kimia Shamaei
  • Patent number: 11916747
    Abstract: A method for automatic discovery of a communication network including a hub, a plurality of termination devices, and a plurality of network elements. The method includes (a) associating respective geographic information with each termination device, (b) determining a respective distance of each termination device from the hub, (c) grouping, at least partially based on diagnostic information from the communication network, two or more of the plurality of termination devices sharing a common characteristic, (d) determining a topology of the communication network, and (e) determining a respective characteristic of at least one network element of the plurality of network elements.
    Type: Grant
    Filed: August 26, 2022
    Date of Patent: February 27, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Luis Alberto Campos, Christopher J. Corcimiglia, Thomas Holtzman Williams, Lin Cheng, Sayandev Mukherjee, Belal Hamzeh
  • Patent number: 11914068
    Abstract: The present disclosure relates to a radar ranging system based on a true random generator and a ranging method thereof The present disclosure adopts the following technical scheme: the system comprises a radar signal modulation and transmission unit and a radar signal receiving and processing unit, wherein the radar signal modulation and transmission unit inputs and stores a true random binary sequence generated by the true random generator in a memory, and cyclically outputs the true random binary sequence to a BPSK modulator for phase modulation. The receiving and amplifying unit receives the reflected radar signal. The down-sampling unit down samples the intermediate frequency signal generated by the mixers. The data processing unit converts the sampled analog signal into a digital signal and cross-correlates the signal with the true random binary sequence in the memory, so as to obtain the distance to the object side to be measured.
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: February 27, 2024
    Assignee: Taiyuan University of Technology
    Inventors: Jianguo Zhang, Rui Hou, Hang Xu, Li Liu, Zhiwei Jia, Yuncai Wang
  • Patent number: 11892535
    Abstract: A signal processing apparatus that performs signal processing on a Doppler spectrum derived from a reception signal of a reflected wave of pulsed undulation repeatedly transmitted into a space removes a topographic echo spectrum from the Doppler spectrum and extracts a plurality of candidate points of a target echo spectrum from the Doppler spectrum from which the topographic echo spectrum has been removed. Furthermore, the signal processing apparatus determines positional relation between the candidate points and a plurality of removed points of the topographic echo spectrum removed from the Doppler spectrum and extracts as an interpolation point, a point where the target echo spectrum is missing by removal of the topographic echo spectrum based on positional relation between the candidate points and the removed points in a direction of a frequency axis.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: February 6, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroshi Sakamaki, Ikuya Kakimoto, Tomoya Matsuda, Takamichi Nakamizo
  • Patent number: 11860266
    Abstract: A method of detecting a life includes receiving an echo signal including an in-phase component and a quadrature component, performing a preprocessing procedure on the echo signal to generate a preprocessed signal, generating, according to the preprocessed signal, complex conjugate data associated with the in-phase component and the quadrature component, performing a first time-domain-to-frequency-domain transform on the complex conjugate data to generate Doppler spectrogram data comprising a plurality of positive velocity energies and a plurality of negative velocity energies, generating combined Doppler spectrogram data according to the plurality of positive velocity energies and the plurality of negative velocity energies, performing a second time time-domain-to-frequency-domain transform on the combined Doppler spectrogram data to generate spectrum data, and determining whether a life is detected according to the spectrum data.
    Type: Grant
    Filed: February 8, 2021
    Date of Patent: January 2, 2024
    Assignee: RichWave Technology Corp.
    Inventors: Keng-Hao Liu, Han-Jieh Chang, Hsiang-Feng Chi
  • Patent number: 11796632
    Abstract: A radar system utilizing a linear chirp that can achieve a larger MIMO virtual array than traditional systems is provided. Transmit channels transmit distinct chirp signals in an overlapped fashion such that the pulse repetition interval is kept short and the frame is kept short. This alleviates range migration and aids in achieving a high frame update rate. The chirp signals from differing transmitters can be separated on receive in the range spectrum domain, such that a MIMO virtual array construction is possible. Distinct chirps are delayed versions of the first chirp signal. Chirps overlap in the fast-time domain, but due to delay, there is separation in the range spectrum domain. When the delay is at least the instrument round-trip delay, transmitters are separable. Further, the wavelengths are identical across transmitters such that there is no residual-range versus angle ambiguity issue present in the claimed frequency-offset modulation range division MIMO system.
    Type: Grant
    Filed: December 17, 2020
    Date of Patent: October 24, 2023
    Assignee: NXP USA, Inc.
    Inventors: Ryan Haoyun Wu, Douglas Alan Garrity, Maik Brett
  • Patent number: 11747462
    Abstract: The disclosed radar system may include a radar mechanism comprising a transmitter and at least one receiver. The radar system may also include a signal generator that generates a frequency-modulated radar signal. In addition, the radar system may include at least one frequency multiplier that, after multiplying a frequency of the frequency-modulated radar signal by a certain factor, synchronously passes the frequency-modulated radar signal to (1) the transmitter to be transmitted to at least one transponder located on a wearable device and (2) a processing device communicatively coupled to the receiver. The processing device may (1) detect a signal returned to the receiver from the transponder in response to the frequency-modulated radar signal and (2) calculate a distance between the transponder and the receiver based at least in part on an analysis of the signal returned from the transponder and the frequency-modulated radar signal received from the frequency multiplier.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: September 5, 2023
    Assignee: Meta Platforms Technologies, LLC
    Inventors: Riccardo DeSalvo, Giuseppe Castaldi, Andrea Cusano, Vincenzo Galdi, Paolo Mattera, Roberto Parente, Fereydoun Daneshgaran, Joseph Minh Tien, Dustin Jeffery Gordon Krogstad
  • Patent number: 11726175
    Abstract: A method includes receiving radar parameters from a unit under test (UUT). The method also includes generating a simulated radar return for the UUT using at least one graphics processing unit (GPU), where the simulated radar return includes digital signals. The method further includes controlling a timing of output of the simulated radar return to the UUT using at least one field programmable gate array (FPGA) carrier. The method also includes converting the digital signals into analog signals using multiple digital-to-analog converters (DACs). In addition, the method includes transmitting the analog signals to the UUT.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: August 15, 2023
    Assignee: Raytheon Company
    Inventors: Joseph T. DeMarco, Brendan W. Jacobs, Tyler S. Lacy, Garrick D. Gaines, Edward J. Romic, Richard E. Jones, Avery R. Davis, Anthony J. Bristow, Thomas B. Butler, Dusty L. Clark, Scott S. Thoesen
  • Patent number: 11662426
    Abstract: A maritime radar system is provided, comprising a transmitter, a receiver, and one or more processors arranged to provide range and azimuth discrimination of a detection area by performing a delay/Doppler analysis of the echo of a single beam transmitted by the transmitter and received by the receiver.
    Type: Grant
    Filed: November 11, 2020
    Date of Patent: May 30, 2023
    Assignee: Airbus Defence and Space Limited
    Inventor: Jose Marquez Martinez
  • Patent number: 11650286
    Abstract: A method for separating large and small targets from noise in radar IF signals, according to which a receiver receives, echo signals that are reflected from targets of different size (such as walls or ground), in response to the transmission of chirp FMCW radar signals, modulated (e.g., using Linear Frequency Modulation) in a predetermined modulation speed for a predetermined duration. The echo signals are down-converted by mixing them with the transmitted signal, to obtain received Intermediate Frequency (IF) signal, which is then sampled both in phase (I-channel) and in quadrature phase (Q-channel). The received IF signal passes a Fourier transform, to obtain power spectral components that belong to a relevant frequency domain, associated with an echo signal reflected from a real target, along with corresponding power spectral components that belong to an irrelevant, opposite frequency domain.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: May 16, 2023
    Inventor: Ronit Roxana Fuchs
  • Patent number: 11644560
    Abstract: Techniques for target tracking that include obtaining state information for a first target object, the state information including previous location information for the first target object and a previous group distribution for points associated with the first target object at a previous point in time, predicting a location for the first target object based on the obtained state information, receiving a first set of points, identifying a first distribution of points, from the first set of points based on the predicted location to associate one or more first points of the first distribution of points with the target object, determining a current group distribution for the points associated with the first target object, and outputting a current location information and a current group distribution point.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: May 9, 2023
    Assignee: Texas Instmments Incorporated
    Inventors: Michael Livshitz, Mingjian Yan
  • Patent number: 11639983
    Abstract: A radar sensor is described herein. In accordance with one example embodiment the radar sensor includes a transmitter for transmitting an RF signal and a receiver configured to receive a respective back-scattered signal from at least one radar target and to provide a corresponding digital radar signal. The radar sensor further includes a processor configured to convert the digital radar signal into the frequency do-main thus providing respective frequency domain data and to compress the frequency domain data. A communication interface is configured to transmit the compressed frequency domain data via a communication link operably coupled to the communication interface. Furthermore, respective and related radar methods and systems are described.
    Type: Grant
    Filed: April 30, 2021
    Date of Patent: May 2, 2023
    Assignee: Infineon Technologies AG
    Inventors: Andre Roger, Markus Bichl, Dian Tresna Nugraha, Romain Ygnace
  • Patent number: 11624732
    Abstract: A detection device includes a vibration sensor configured to detect vibration of a machine, a calculation unit configured to perform FFT analysis on detection data of the vibration sensor, divide a specific frequency range into a plurality of frequency ranges, and calculate a partial overall value for each of the plurality of frequency ranges, and a wireless communication device configured to transmit the partial overall value.
    Type: Grant
    Filed: April 23, 2021
    Date of Patent: April 11, 2023
    Assignee: KELK Ltd.
    Inventor: Tomonori Murata
  • Patent number: 11609323
    Abstract: An ultra-wideband ground penetrating radar control system, comprising a synchronous clock generating circuit, a GPS positioning module, a measuring wheel encoder module, a digitally controlled delay circuit for equivalent sampling, an analog-to-digital conversion (ADC) circuit, and a main controller. The synchronous clock generating circuit, the GPS positioning module, the measuring wheel encoder module, the digitally controlled delay circuit and the ADC circuit are all connected to the main controller. The synchronous clock generating circuit is further connected to an external ultra-wideband radar transmitter. The digitally controlled delay circuit is further connected to an external sampling pulse generation circuit for equivalent sampling. The ADC circuit is further connected to an external sampling gate for equivalent sampling. The main controller is further connected to an external server via Ethernet. The volume of an ultra-wideband ground penetrating radar control system is reduced.
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: March 21, 2023
    Assignee: Nantong Institute of Nanjing University of Posts and Telecommunications Co., Ltd.
    Inventors: Zhikuang Cai, Xuanchen Qi, Wenhua Lin, Ji Wang, Jian Xiao, Yufeng Guo
  • Patent number: 11601133
    Abstract: A system and method for performing discrete frequency transform including a pair of single-bit analog to digital converters (ADCs), a phase converter, a memory, a discrete frequency transform converter and summation circuitry. The ADCs convert an analog input signal into N pairs of binary in-phase and quadrature component samples each being one of four values at a corresponding one of four phases. The phase converter determines a phase value for each pair of component samples. The memory stores a set of discrete frequency transform coefficient values based on N. The discrete frequency transform converter uses a phase value and a pair of discrete frequency transform coefficient values retrieved from the memory for a selected frequency bin to determine a discrete frequency component for each pair of phase component samples. The summation circuitry sums the corresponding N frequency domain components for determining a frequency domain value for the selected frequency bin.
    Type: Grant
    Filed: October 27, 2020
    Date of Patent: March 7, 2023
    Assignee: Silicon Laboratories Inc.
    Inventor: Anant Verma
  • Patent number: 11598847
    Abstract: A light detection and ranging (LiDAR) apparatus and a method of operating the LiDAR apparatus are provided. The LiDAR apparatus includes a light transmitter configured to irradiate a laser pulse towards an object, the laser pulse being generated based on a reference signal; a light receiver configured to receive the laser pulse reflected from the object and configured to obtain a first signal from the received laser pulse; and at least one processor configured to convert the first signal and the reference signal respectively into unipolar signals and configured to detect a flight time of the laser pulse based on a correlation between the converted first signal and the converted reference signal.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: March 7, 2023
    Assignees: SAMSUNG ELECTRONICS CO., LTD., GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Jungwoo Kim, Youngjoon Jo, Kyihwan Park
  • Patent number: 11592546
    Abstract: An airborne radar system and signal interpretation approach that detects slow moving ground targets using angle and Doppler of Keystone formatting process, and is referred to as Angle-Doppler Keystone Formatting (ADK). ADK collapses the clutter ridge to a constant Doppler or to a constant angle, thereby transforming a clutter ridge in angle-Doppler space into a horizontal line of constant Doppler or a vertical line of constant angle. Clutter may then be filtered more effectively, such as by using multiple beams as the source of STAP training data or by using multiple Doppler bins.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: February 28, 2023
    Assignee: SRC, Inc.
    Inventors: Harvey K. Schuman, Daniel D. Thomas, Jr., Jason M. Steeger, Lun Z. Chen
  • Patent number: 11588968
    Abstract: A system includes a transmission unit configured to generate an electromagnetic wave, a first reception unit configured to detect the electromagnetic wave, and a processing unit configured to determine whether an output of the electromagnetic wave from the transmission unit is more than or equal to a threshold based on first image information obtained by capturing an image of the transmission unit in a state where the transmission unit is irradiating the electromagnetic wave.
    Type: Grant
    Filed: May 11, 2021
    Date of Patent: February 21, 2023
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Zempei Wada, Takahiro Sato, Takeaki Itsuji
  • Patent number: 11543517
    Abstract: The present disclosure relates to a method and apparatus for phase unwrapping of an SAR interferogram based on an SAR offset tracking surface displacement model, in which the apparatus according to the present disclosure includes a Synthetic Aperture Radar (SAR) image acquisition unit that acquires two SAR images of a same object acquired at different times, a single look complex (SLC) image production unit that produces two SLC images corresponding to each of the two SAR images, an interferogram production unit that generates an SAR interferogram using SAR interferometry for the two SLC images, a surface displacement model production unit that produces an offset tracking surface displacement model using SAR offset tracking method for the two SLC images, an unwrapped residual interferogram generation unit that generates a residual interferogram by subtracting the SAR interferogram and the offset tracking surface displacement model, and generates an unwrapped residual interferogram by unwrapping the generated
    Type: Grant
    Filed: August 12, 2019
    Date of Patent: January 3, 2023
    Assignee: University of Seoul Industry Cooperation Foundation
    Inventors: Hyung-Sup Jung, Won-Kyung Baek, Sung-Ho Chae
  • Patent number: 11482779
    Abstract: A system is provided comprising: a plurality of receivers; a plurality of antennas; a calibration device coupled to the plurality of receivers; a plurality of antenna paths, each of the antenna paths being arranged to couple a respective one of the plurality of receivers with a respective one of the plurality of antennas; a plurality of first calibration paths, each of the first calibration paths being arranged to couple the calibration device to different respective first pair of the antenna paths; a plurality of second calibration paths, each of the second calibration paths being arranged to couple the calibration device to a different respective second pair of the antenna paths, each second pair of the antenna paths including at least one antenna path in common with any of the first pairs of the antenna paths.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: October 25, 2022
    Assignee: Raytheon Company
    Inventor: David Bates
  • Patent number: 11477061
    Abstract: Wireless digital communication method for the communication between two electronic devices (3, 16) of an industrial apparatus (1), including—encoding each bit of information by a respective sequence of a certain number (N) of pulses (25) that alternate with a corresponding number (N?1) of silence intervals (26), each pulse having a pulse duration (TI) shorter than or equal to ns and said silence intervals having respective silence durations (TSj) longer than or equal to 30 ns—transmitting, by a first electronic device, a radio signal (RS) comprising a plurality of radio pulses corresponding to the sequence of pulses without modulating any radio carrier, and—receiving and decoding, by the other electronic device, said radio signal to obtain said bit of information.
    Type: Grant
    Filed: July 26, 2019
    Date of Patent: October 18, 2022
    Assignee: Marposs Societa' Per Azioni
    Inventor: Roberto Padovani
  • Patent number: 11454718
    Abstract: An illustrative example embodiment of a computer implemented method for estimating a vertical profile of a road in front of or behind a host vehicle includes monitoring a detection point at a surrounding or preceding vehicle by a sensor on the host vehicle, determining at least one value for a height of the detection point with respect to a reference level at the host vehicle based on the elevation angle of the detection point, and estimating the vertical profile of the road based on the at least one value for the height of the detection point. An estimation of a height of the object with respect to a road surface may be corrected by the estimated vertical profile.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: September 27, 2022
    Assignee: APTIV TECHNOLOGIES LIMITED
    Inventor: Jens Westerhoff
  • Patent number: 11448744
    Abstract: In one embodiment, a method includes configuring a radar transceiver to transmit a first number of radar pulses at a first pulse repetition frequency (PRF); and determining a first value corresponding to a first object based on a first radar data received in response to the first number of radar pulses. The first object is identified based on the first value being higher than a predetermined threshold value. The method also includes configuring the radar transceiver to transmit a second number of radar pulses at a second PRF that is higher than the first PRF; determining a second value of the first object based on a second radar data received in response to the second number of radar pulses; and associating the second value with information of the first object.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: September 20, 2022
    Assignee: Woven Planet North America, Inc.
    Inventors: Mohammad Emadi, Jamaledin Izadian
  • Patent number: 11435435
    Abstract: Disclosed herein is a radar device. The radar device can implement a virtual antenna with high spatial resolution having a two-dimensional (2D) distribution of received beams using a plurality of transmitting and a plurality of receiving antennas.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: September 6, 2022
    Assignee: SMART RADAR SYSTEM, INC.
    Inventors: Yong Jae Kim, Jae Yong Lee, Kyoung Sub Oh
  • Patent number: 11416825
    Abstract: A system is described herein. The system includes an agent and a transmitter. The agent is to a capture room specific data signals from peripheral devices within a conference room, operating system data signals, and application data signals, wherein the application data signals are obtained from a conferencing service application and wherein the agent is to package the room specific data signals, the operating system data signals, and the application data signals with system metadata into room health data. The transmitter is to transmit the room health data to a management cloud via a communications broker.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: August 16, 2022
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Sameer D. Bedekar, Danilo Pérez Solano, David C. Tse, Martin D. Hall, Andrew A. George, Jaya B. Rayasam, Siddhartha Roy, David A. Howell, Irena K. Andonova
  • Patent number: 11408733
    Abstract: A method and device for measuring the layer thickness of an object. Initially, an object with a layer thickness is provided. Thereupon, at least two measurement steps are performed, where electromagnetic radiation with frequencies in a frequency band associated with the respective measurement step is radiated on the object in each case. The frequency bands are different portions of one bandwidth. Secondary radiation emanating from the boundary surfaces of the object is detected and a measurement signal associated with the measurement step is ascertained. The measurement signals are combined according to the respective frequency bands associated with the measurement steps in order to form an evaluation signal; a fundamental frequency is determined therefrom, and the layer thickness is calculated. A large bandwidth can be realized by a narrow-bandwidth measurement steps by the method. As a result, physical limits of known methods are overcome, and the measurement accuracy is increased.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: August 9, 2022
    Assignee: INOEX GMBH
    Inventors: Benjamin Littau, Giovanni Schober, Stefan Kremling
  • Patent number: 11378684
    Abstract: Provided is a radar device including: a transmission circuit that transmits a first transmission signal and a second transmission signal which have frequencies different from each other; a reception circuit that receives the first transmission signal and the second transmission signal which are reflected by one or a plurality of objects as a first reception signal and a second reception signal, a processor, and a memory that stores a command group executable by the processor.
    Type: Grant
    Filed: June 4, 2020
    Date of Patent: July 5, 2022
    Assignees: FURUKAWA ELECTRIC CO., LTD., FURUKAWA AUTOMOTIVE SYSTEMS INC.
    Inventors: Hajime Namiki, Hiroyuki Kobayashi, Eisuke Otani
  • Patent number: 11360188
    Abstract: Methods and systems for monitoring a health parameter in a person using a radar system are disclosed. A method involves performing stepped frequency scanning below the skin surface of a person using at least one transmit antenna and a two-dimensional array of receive antennas, the stepped frequency scanning being performed using frequency steps of a first step size, changing the first step size to a second different step size in response to a change in reflectivity of blood in a blood vessel of the person, performing stepped frequency scanning below the skin surface of the person using the second step size after the step size is changed from the first step size to the second step size, and outputting a signal that corresponds to a blood pressure level in the person in response to the stepped frequency scanning at the first step size and at the second step size.
    Type: Grant
    Filed: October 22, 2020
    Date of Patent: June 14, 2022
    Assignee: Movano Inc.
    Inventor: Michael A. Leabman
  • Patent number: 11358844
    Abstract: An industrial vehicle remote operation system includes an industrial vehicle that includes a vehicle communication unit performing wireless communication; and a remote operation device that includes a remote communication unit performing wireless communication with the vehicle communication unit.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: June 14, 2022
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Hironobu Okamoto, Takehito Sakakibara, Koji Hika
  • Patent number: 11320516
    Abstract: Time-division quadrature sampling may be used in a pulse-modulated continuous wave (PMCW) radar receiver circuit, e.g., as may be employed in various types of radar sensors used in automotive and other applications, to enable a quadrature sampling circuit to sequence between digitally sampling different complex components of a received radar signal at different times.
    Type: Grant
    Filed: May 27, 2021
    Date of Patent: May 3, 2022
    Assignee: Aurora Operations, Inc.
    Inventors: Stephen Crouch, Chunshu Li
  • Patent number: 11228478
    Abstract: A wireless transceiver system includes a transmitter and a receiver. The transmitter includes a digital processor and a self-correction modulator coupled to the digital processor, wherein based upon a calibration correction assessment of an in-phase (I) signal and a quadrature (Q) signal received from the digital processor, the self-correction modulator generates a calibrated modulated signal. The self-correction modulator includes a core modulator and a calibration correction unit. The calibration correction unit is configured to correct an output of the core modulator based upon the calibration correction assessment. The calibration correction unit includes a calibration processing unit and a calibration modulator, wherein the calibration processing unit provides correction quantities that are used to program the calibration modulator to provide the self-corrected modulated signal.
    Type: Grant
    Filed: October 13, 2020
    Date of Patent: January 18, 2022
    Assignee: NXP B.V.
    Inventors: Marios Neofytou, Konstantinos Doris, Marcello Ganzerli, Georgi Ivanov Radulov, Pavlos Athanasiadis
  • Patent number: 11143744
    Abstract: A method for attenuating a leakage signal in an FMCW radar system and a radar system thereof are provided. The method includes concentrating a phase noise of the leakage signal on a stationary point and attenuating the phase noise based on the concentration of the phase noise on the stationary point.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: October 12, 2021
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: SeongOok Park, Junhyeong Park
  • Patent number: 11061127
    Abstract: A vehicle radar system including at least one transceiver arrangement (52) that is arranged to generate and transmit a least one FMCW chirp signal (4a, 4b). Each chirp signal (4a, 4b) includes a corresponding plurality of frequency ramps (r1, r2). The vehicle radar system (3) is arranged to receive reflected signals (5a, 5b) and to mix the received signals (5a, 5b) with the respective transmitted chirp signal (4a, 4b) to obtain at least one IF signal (14). The vehicle radar system (3) is further arranged to produce a periodically updated dwell list (34), and to collect and process data in dependence of the present dwell list (34). The present dwell list includes information where the probability of presence of objects exceeds a certain threshold.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: July 13, 2021
    Assignee: VEONEER SWEDEN AB
    Inventors: Dirk Klotzbuecher, Michael Paradie
  • Patent number: 10996311
    Abstract: A radar sensor is described herein. In accordance with one example embodiment the radar sensor includes a transmitter for transmitting an RF signal and a receiver configured to receive a respective back-scattered signal from at least one radar target and to provide a corresponding digital radar signal. The radar sensor further includes a processor configured to convert the digital radar signal into the frequency do-main thus providing respective frequency domain data and to compress the frequency domain data. A communication interface is configured to transmit the compressed frequency domain data via a communication link operably coupled to the communication interface. Furthermore, respective and related radar methods and systems are described.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: May 4, 2021
    Assignee: Infineon Technologies AG
    Inventors: Andre Roger, Markus Bichl, Dian Tresna Nugraha, Romain Ygnace
  • Patent number: 10677901
    Abstract: Provided is an ultrasound diagnosis apparatus that may include a data acquisition unit that acquires ultrasound data based on received echo signals from an object; and a processor that may estimate a center frequency of the ultrasound data and, based on the center frequency, perform pulse compression on the ultrasound data to generate short signals from elongated signals.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: June 9, 2020
    Assignees: SAMSUNG MEDISON CO., LTD., SOGANG UNIVERSITY RESEARCH FOUNDATION
    Inventors: Woo-youl Lee, Yangmo Yoo, Jinbum Kang
  • Patent number: 10673479
    Abstract: An apparatus is disclosed for range-based transmission parameter adjustment. In an example aspect, the apparatus includes a first antenna, a second antenna, and a wireless transceiver. The wireless transceiver is coupled to the first antenna and the second antenna. The wireless transceiver is configured to transmit a proximity detection signal via the first antenna. The wireless transceiver is also configured to receive a reflected proximity detection signal via the second antenna. The reflected proximity detection signal including a portion of the proximity detection signal that is reflected by an object. The wireless transceiver is additionally configured to adjust a transmission parameter based on the reflected proximity detection signal. The transmission parameter varies according to a range to the object. The wireless transceiver is further configured to transmit an uplink signal using the transmission parameter.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: June 2, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Udara Fernando, Sang-June Park, Shrenik Patel, Roberto Rimini, Steven Charles Ciccarelli
  • Patent number: 10641866
    Abstract: A radar system is provided that includes a receive channel including a complex baseband and a processor coupled to the receive channel to receive a first plurality of digital intermediate frequency (IF) samples from an in-band (I) channel of the complex baseband and a corresponding second plurality of digital IF samples from a quadrature (Q) channel of the complex baseband, wherein the processor is configured to execute instructions to compute at least one failure metric based on the first plurality of digital IF samples and the second plurality of digital IF samples.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: May 5, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Karthik Ramasubramanian, Karthik Subburaj, Jasbir Singh Nayyar
  • Patent number: 10591596
    Abstract: A system and method for obtaining a Doppler frequency of a target are disclosed. A receiver receives a first plurality of samples of a first echo signal from the target and a second plurality of samples of a second echo signal from the target. The second plurality of samples is separated from the first plurality of samples by a time period. A phase shift is determined for the duration of the time period and the phase shift is applied to the second plurality of samples. The first plurality of samples is combined with the second plurality of samples to obtain combined samples, and the Doppler frequency for the target is obtained from the combined samples.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: March 17, 2020
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Alexander Pokrass, Igal Bilik, Moshe Laifenfeld
  • Patent number: 10527713
    Abstract: A method of calibrating a radar system of a vehicle is disclosed. A source signal is transmitted from a transmitter at a target at a selected location from the radar system. An echo signal is received as a reflection of the source signal from the target at an in-phase channel and quadrature channel of a receiver. A range space for the echo signal is obtained that includes a target peak corresponding to the target, wherein the range space includes a ghost peak for the target resulting from an IQ difference between the in-phase and quadrature channels. The IQ difference between the in-phase and quadrature channels is adjusted to reduce an amplitude of the ghost frequency peak.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: January 7, 2020
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Igal Bilik, Alexander Pokrass, Shahar Villeval
  • Patent number: 10489159
    Abstract: Decompressing sliding window compressed data requires reference to previously decompressed character sequences. Previously decompressed data is stored in a history buffer to satisfy these ‘back references.’ As each decompressed/decoded character is emitted, it is stored in this history buffer. Thus, for each decompressed character that is emitted, the history buffer may need to be accessed at least twice—once to retrieve the backreference, and once to store the emitted character. A pipeline architecture is disclosed that stores decompressed characters in a write queue that coalesces eight or more emitted characters before they are stored in the history buffer memory. This reduces collisions between accessing the history buffer memory to retrieve the backreferences and the storing of the emitted character. This also allows the use of a single-ported memory which is less expensive than a multi-ported memory.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: November 26, 2019
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Amar Vattakandy, Michael J. Erickson, Robert W. Havlik, Derek E. Gladding
  • Patent number: 10371815
    Abstract: This radar module is provided with: a transmission antenna; a reception antenna; a signal source for generating a transmission signal; a transmission unit for transmitting a transmission signal towards a target object through the transmission antenna; a reception unit for receiving, through the reception antenna, a reflected signal produced by reflection of the transmission signal from the target object; a signal processing unit for performing signal processing on the basis of a reception signal outputted by the reception unit; and an external interface for outputting information obtained by the signal processing unit. The signal processing unit calculates an average value and a variance value of the received power of the reception signal, and uses the calculated average value and variance value to identify the target object.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: August 6, 2019
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventor: Yuji Takada
  • Patent number: 10274594
    Abstract: A method and system to estimate a velocity of a target use a radar to transmit a linear frequency modulated chirp from each of a plurality of transmit elements and receive resulting reflections. The system also includes a processor to process the reflections resulting from a frame of chirps at a time and compute the velocity based on determining a number of the frames of chirps for the target to move a specified distance. The processor processes the reflections by performing a range fast Fourier transform (FFT) such that the specified distance is a range spanned by a range bin and each frame of chirps is one transmission of the chirp by each of the plurality of transmit elements.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: April 30, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Alexander Pokrass, Igal Bilik, Shahar Villeval
  • Patent number: 10228450
    Abstract: A radar apparatus detects a target that has reflected radar waves on the basis of each of object signals that have been passed, and detects a detection angle that is an angle formed between the target and a specified reference axis. The radar apparatus determines, as an angle correction value, for a target which is disposed at a set distance from the radar apparatus in such a manner that an angle formed between the target and the reference axis becomes a specified angle, a difference between the specified angle and a detection angle that is detected based on a plurality of object signals that pass through the filters by transmitting and receiving radar waves for the target, and stores the determined angle correction value in a storage unit.
    Type: Grant
    Filed: April 21, 2014
    Date of Patent: March 12, 2019
    Assignee: DENSO CORPORATION
    Inventors: Yutaka Hasegawa, Takamasa Ando
  • Patent number: 10128886
    Abstract: Radio frequency (RF) receivers and methods to spread spectral energy of spurious responses of mixers over a frequency band are disclosed. For example, a receiver includes first and second mixers, and first and second variable frequency oscillators (VFOs). The first mixer is configured to receive an RF signal and provide an intermediate frequency (IF) signal. The second mixer is coupled with the first mixer and configured to receive the IF signal and provide a baseband signal. The first VFO is coupled with the first mixer and configured to provide a first angle modulated LO signal. The second VFO is coupled with the second mixer and configured to provide a second angle modulated LO signal. The first and second mixers provide a stable frequency downconversion.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: November 13, 2018
    Assignee: Keysight Technologies, Inc.
    Inventors: Michael E. Barnard, Thomas A. Gray
  • Patent number: 10078131
    Abstract: The disclosure provides a radar apparatus. The radar apparatus includes a transmitter that transmits a first chirp. The first chirp is scattered by one or more obstacles to generate a first plurality of scattered signals. A plurality of receivers receives the first plurality of scattered signals. Each receiver of the plurality of receivers generates a digital signal in response to a scattered signal of the first plurality of scattered signals. A processor is coupled to the plurality of receivers and receives the digital signals from the plurality of receivers. The processor performs range FFT (fast fourier transform) and angle FFT on the digital signals received from the plurality of receivers to generate a first matrix of complex samples.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: September 18, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Sandeep Rao, Karthik Ramasubramanian
  • Patent number: 9903933
    Abstract: A system for determining a direction for an electromagnetic signal. The system includes a receiving array antenna, including a plurality of antenna elements, each antenna element having a position in the receiving array antenna; a digitizer configured to receive an analog signal from each of the antenna elements, and to sample and digitize each of the analog signals to form a sequence of digitized samples from each of the analog signals; and a processing unit. The processing unit is configured to receive the sequences of sample values from the digitizer; and, for each direction of a plurality of hypothesized directions: combine the sample values from the plurality of antenna elements to form a single time record; fit the single time record with a combination of one or more functions of time; and identify a direction at which a measure of the magnitude of the linear combination is greatest.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: February 27, 2018
    Assignee: RAYTHEON COMPANY
    Inventors: Ian S. Robinson, Bradley A. Flanders
  • Patent number: 9897685
    Abstract: A method for detecting interference in a received signal received by a radar sensor of a motor vehicle is disclosed. For detecting a target object in an environment of the motor vehicle, a transmit signal is emitted by the radar sensor, which includes a sequence of consecutive frequency-modulated chirp signals. The radar sensor then receives an echo signal reflected on the target object as the received signal with the superimposed interference. After receiving the received signal, the interference in the chirp signals of the received signal is detected.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: February 20, 2018
    Assignee: VALEO Schalter und Sensoren GmbH
    Inventors: Alicja Ossowska, Udo Haberland
  • Patent number: 9213091
    Abstract: A radio frequency transmission signal is transmitted from a transmission antenna with a predetermined transmission period, and a signal of a reflected wave reflected from a target is received by a reception antenna. A code generator generates a first code sequence and second code sequence that constitute a pair of complementary codes. A first modulator modulates the first code sequence to generate a first transmission signal. A second modulator modulates the second code sequence to generate a second transmission signal. A quadrature modulator performs quadrature modulation by using the generated first and second transmission signals. The radio frequency transmission signal is generated from a signal that is quadrature modulated, and transmitted from the transmission antenna.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: December 15, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takaaki Kishigami, Yoichi Nakagawa, Hirohito Mukai
  • Patent number: 9160586
    Abstract: Systems and techniques relating to IQ mismatch estimation and compensation are described. A described technique includes obtaining samples of a received signal via circuitry having an IQ mismatch; determining an estimated gain imbalance parameter for the IQ mismatch based on an in-phase average value of in-phase training samples and a quadrature average value of quadrature training samples; determining an estimated phase imbalance parameter for the IQ mismatch based on a combined average value, the estimated gain imbalance parameter, and a squared average value, the combined average value being based on a pair-wise multiplication of the in-phase training samples and the quadrature training samples, the squared average value being based on squared versions of the in-phase training samples; updating the in-phase data samples based on the estimated gain imbalance parameter to produce updated in-phase data samples; and updating the quadrature data samples by respectively adding quadrature update values thereto.
    Type: Grant
    Filed: July 23, 2014
    Date of Patent: October 13, 2015
    Assignee: Marvell International Ltd.
    Inventors: Zixia Hu, Songping Wu