Patents by Inventor David Trager

David Trager has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 12316363
    Abstract: An apparatus includes a radio-frequency (RF) receiver for receiving an RF signal using a plurality of antennas. The RF receiver includes a demodulator to provide a switch signal to cause the RF receiver to use an antenna in the plurality of antennas. The RF receiver further includes a carrier frequency offset (CFO) correction circuit that estimates and removes a carrier frequency offset.
    Type: Grant
    Filed: August 31, 2023
    Date of Patent: May 27, 2025
    Assignee: Silicon Laboratories Inc.
    Inventors: Antonio Torrini, Hendricus de Ruijter, Yan Zhou, David Trager
  • Publication number: 20230412205
    Abstract: An apparatus includes a radio-frequency (RF) receiver for receiving an RF signal using a plurality of antennas. The RF receiver includes a demodulator to provide a switch signal to cause the RF receiver to use an antenna in the plurality of antennas. The RF receiver further includes a carrier frequency offset (CFO) correction circuit that estimates and removes a carrier frequency offset.
    Type: Application
    Filed: August 31, 2023
    Publication date: December 21, 2023
    Inventors: Antonio Torrini, Hendricus de Ruijter, Yan Zhou, David Trager
  • Patent number: 11784671
    Abstract: An apparatus includes a radio-frequency (RF) receiver for receiving an RF signal using a plurality of antennas. The RF receiver includes a demodulator to provide a switch signal to cause the RF receiver to use an antenna in the plurality of antennas. The RF receiver further includes a carrier frequency offset (CFO) correction circuit that estimates and removes a carrier frequency offset.
    Type: Grant
    Filed: December 30, 2020
    Date of Patent: October 10, 2023
    Assignee: Silicon Laboratories Inc.
    Inventors: Antonio Torrini, Hendricus de Ruijter, Yan Zhou, David Trager
  • Patent number: 11770287
    Abstract: An apparatus includes a radio-frequency (RF) receiver for receiving an RF signal using a plurality of antennas. The RF receiver includes a demodulator to provide a switch signal to cause the RF receiver to use an antenna in the plurality of antennas. The RF receiver further includes a carrier frequency offset (CFO) correction circuit that uses an estimation of the carrier frequency offset and an estimation of phase differences to remove the carrier frequency offset.
    Type: Grant
    Filed: December 30, 2020
    Date of Patent: September 26, 2023
    Assignee: Silicon Laboratories Inc.
    Inventors: Antonio Torrini, Hendricus de Ruijter, Yan Zhou, David Trager
  • Publication number: 20220210001
    Abstract: An apparatus includes a radio-frequency (RF) receiver for receiving an RF signal using a plurality of antennas. The RF receiver includes a demodulator to provide a switch signal to cause the RF receiver to use an antenna in the plurality of antennas. The RF receiver further includes a carrier frequency offset (CFO) correction circuit that uses an estimation of the carrier frequency offset and an estimation of phase differences to remove the carrier frequency offset.
    Type: Application
    Filed: December 30, 2020
    Publication date: June 30, 2022
    Inventors: Antonio Torrini, Hendricus de Ruijter, Yan Zhou, David Trager
  • Publication number: 20220209808
    Abstract: An apparatus includes a radio-frequency (RF) receiver for receiving an RF signal using a plurality of antennas. The RF receiver includes a demodulator to provide a switch signal to cause the RF receiver to use an antenna in the plurality of antennas. The RF receiver further includes a carrier frequency offset (CFO) correction circuit that estimates and removes a carrier frequency offset.
    Type: Application
    Filed: December 30, 2020
    Publication date: June 30, 2022
    Inventors: Antonio Torrini, Hendricus de Ruijter, Yan Zhou, David Trager
  • Patent number: 10976431
    Abstract: A radar sensing system for a vehicle includes a transmitter and a receiver. The transmitter is configured for installation and use on a vehicle. The transmitter is configured to transmit radio signals. The receiver is configured for installation and use on the vehicle. The receiver is configured to receive radio signals that include (i) the transmitted radio signals transmitted by the transmitter and reflected from objects in an environment, and (ii) other radio signals that include radio signals transmitted by at least one other radar sensing system. The receiver is configured to filter frequency modulated continuous wave (FMCW) radio signals from the received radio signals to produce filtered radio signals. The receiver is further configured to select between (i) the filtered radio signals, and (ii) the received radio signals before filtering. The filtered radio signals are selected when the other radio signals include FMCW radio signals.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: April 13, 2021
    Assignee: Uhnder, Inc.
    Inventors: Fred Harris, David Trager, Curtis Davis, Raghunath K. Rao
  • Patent number: 10911129
    Abstract: In one embodiment, an apparatus includes: an antenna switch to receive a first radio frequency (RF) signal from a first antenna and a second RF signal from a second antenna and controllable to output a selected one of the first and second RF signals; an RF circuit to receive and process the first and second RF signals; at least one mixer to downconvert the first and second RF signals to first and second baseband signals; and an antenna diversity control circuit to receive sub-symbol portions of a first plurality of symbols of the first baseband signal and sub-symbol portions of a second plurality of symbols of the second baseband signal, and control the antenna switch to output one of the first and second RF signals, based at least in part on one or more of the sub-symbol portions of the first and second pluralities of symbols.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: February 2, 2021
    Assignee: SILICON LABORATORIES INC.
    Inventors: Hendricus De Ruijter, Antonio Torrini, Yan Zhou, David Trager
  • Publication number: 20180275270
    Abstract: A radar sensing system for a vehicle includes a transmitter and a receiver. The transmitter is configured for installation and use on a vehicle. The transmitter is configured to transmit radio signals. The receiver is configured for installation and use on the vehicle. The receiver is configured to receive radio signals that include (i) the transmitted radio signals transmitted by the transmitter and reflected from objects in an environment, and (ii) other radio signals that include radio signals transmitted by at least one other radar sensing system. The receiver is configured to filter frequency modulated continuous wave (FMCW) radio signals from the received radio signals to produce filtered radio signals. The receiver is further configured to select between (i) the filtered radio signals, and (ii) the received radio signals before filtering. The filtered radio signals are selected when the other radio signals include FMCW radio signals.
    Type: Application
    Filed: May 31, 2018
    Publication date: September 27, 2018
    Inventors: Fred Harris, David Trager, Curtis Davis, Raghunath K. Rao
  • Patent number: 9989638
    Abstract: A radar sensing system for a vehicle includes a transmitter, a receiver, a processor and an adaptive filter. The transmitter is configured to transmit a radio signal. The receiver is configured to receive radio signals that include the transmitted radio signal reflected from objects in the environment, as well as further including other radio signals transmitted from at least one other radar sensing system. The receiver is further configured to produce a sampled stream. The sampled stream is provided to the processor. The processor, responsive to further processing of the sampled stream, controls the adaptive filter to filter the sampled stream, such that the other radio signals transmitted from the at least one other radar sensing system are removed from the received radio signal.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: June 5, 2018
    Assignee: Uhnder, Inc.
    Inventors: Fred Harris, David Trager, Curtis Davis, Raghunath K. Rao
  • Publication number: 20180031697
    Abstract: A radar sensing system for a vehicle includes a transmitter, a receiver, a processor and an adaptive filter. The transmitter is configured to transmit a radio signal. The receiver is configured to receive radio signals that include the transmitted radio signal reflected from objects in the environment, as well as further including other radio signals transmitted from at least one other radar sensing system. The receiver is further configured to produce a sampled stream. The sampled stream is provided to the processor. The processor, responsive to further processing of the sampled stream, controls the adaptive filter to filter the sampled stream, such that the other radio signals transmitted from the at least one other radar sensing system are removed from the received radio signal.
    Type: Application
    Filed: October 12, 2017
    Publication date: February 1, 2018
    Inventors: Fred Harris, David Trager, Curtis Davis, Raghunath K. Rao
  • Publication number: 20170307753
    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 able to receive radio signals. The received radio signals include transmitted radio signals that are reflected from objects in the environment. The received radio signals further include radio signals transmitted by at least one other radar system. The processor samples the received radio signals to produce a sampled stream. The processor is configured to control an adaptive filter. Responsive to the processor, the adaptive filter is configured to filter the sampled stream, such that the radio signals transmitted by the at least one other radar system are removed from the received radio signals.
    Type: Application
    Filed: April 20, 2017
    Publication date: October 26, 2017
    Inventors: Fred Harris, David Trager, Curtis Davis, Raghunath K. Rao
  • Patent number: 9791564
    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 able to receive radio signals. The received radio signals include transmitted radio signals that are reflected from objects in the environment. The received radio signals further include radio signals transmitted by at least one other radar system. The processor samples the received radio signals to produce a sampled stream. The processor is configured to control an adaptive filter. Responsive to the processor, the adaptive filter is configured to filter the sampled stream, such that the radio signals transmitted by the at least one other radar system are removed from the received radio signals.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: October 17, 2017
    Assignee: UHNDER, INC.
    Inventors: Fred Harris, David Trager, Curtis Davis, Raghunath K. Rao
  • Patent number: 9136824
    Abstract: In one embodiment, an apparatus includes a first receiver path with a first digitizer to digitize an incoming signal obtained from a radio frequency signal including at least a first desired channel into samples, the first digitizer to operate at a first sampling frequency, a first sample rate converter coupled to an output of the first digitizer to receive the samples at the first sampling frequency and to output the samples at a fixed sampling frequency, and a first digital processor to receive and process the samples at the fixed sampling frequency. The apparatus may further include a controller to receive a frequency change indication and to dynamically control the first sample rate converter to accommodate a change in the first sampling frequency from a first rate to a second rate.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: September 15, 2015
    Assignee: Silicon Laboratories Inc.
    Inventors: David Trager, Zhongchun Liu
  • Publication number: 20150200649
    Abstract: In one embodiment, an apparatus includes a first receiver path with a first digitizer to digitize an incoming signal obtained from a radio frequency signal including at least a first desired channel into samples, the first digitizer to operate at a first sampling frequency, a first sample rate converter coupled to an output of the first digitizer to receive the samples at the first sampling frequency and to output the samples at a fixed sampling frequency, and a first digital processor to receive and process the samples at the fixed sampling frequency. The apparatus may further include a controller to receive a frequency change indication and to dynamically control the first sample rate converter to accommodate a change in the first sampling frequency from a first rate to a second rate.
    Type: Application
    Filed: January 10, 2014
    Publication date: July 16, 2015
    Applicant: Silicon Laboratories Inc.
    Inventors: David Trager, Zhongchun Liu
  • Patent number: 8605224
    Abstract: An apparatus may include analog tuner circuitry, a digital unit to process incoming data, an analog interface to receive the processed data for conversion back into analog signals, and a first pin to output the analog signals on a link. A separate digital interface may be present and can be enabled to receive the processed data and encode it into a serial bit stream for transmission via the first pin, avoiding the need for the analog interface to operate when the digital interface is enabled.
    Type: Grant
    Filed: February 27, 2008
    Date of Patent: December 10, 2013
    Assignee: Silicon Laboratories Inc.
    Inventor: David Trager
  • Patent number: 8599312
    Abstract: According to one aspect, a mixed-signal tuner for analog and digital TV reception incorporates a demodulator for analog TV, employing various features for resolving limitations of the analog circuitry and for achieving compatibility with various global TV standards. Such features, which may be present in one or more embodiments, include the use of a variable sample rate in all digital clocks for frequency planning, and use of a microcontroller (MCU) to control various circuitry of the tuner.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: December 3, 2013
    Assignee: Silicon Laboratories Inc.
    Inventors: Alan Hendrickson, David Trager, Mitch Reid, Li Gao, John Khoury
  • Patent number: 8593526
    Abstract: Techniques are disclosed relating to video signal-to-noise ratio (VSNR) measurement. In one embodiment, an analog television signal receiver includes a measurement circuit configured to measure noise in a video signal over one or more intervals that correspond to a horizontal control signal of the video signal and a control unit configured to determine a VSNR based on the measurement. In another embodiment, a first noise calculation circuit is configured to determine first noise information from a video signal and a second noise calculation circuit is configured to determine second noise information from a video signal in a manner different from the first noise calculation circuit. A control unit may be configured to generate a VSNR based on one or both of the first noise information and the second noise information.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: November 26, 2013
    Assignee: Silicon Laboratories Inc.
    Inventors: Alan Hendrickson, David Trager, Zhongchun Liu
  • Patent number: 8576343
    Abstract: According to one aspect, a mixed-signal tuner for analog and digital TV reception incorporates a demodulator for analog TV, employing various features for resolving limitations of the analog circuitry and for achieving compatibility with various global TV standards. Such features, which may be present in one or more embodiments, include the use of a variable sample rate in all digital clocks for frequency planning, and use of a microcontroller (MCU) to control various circuitry of the tuner.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: November 5, 2013
    Assignee: Silicon Laboratories Inc.
    Inventors: Alan Hendrickson, David Trager, Mitch Reid, Li Gao, John Khoury
  • Publication number: 20100328536
    Abstract: According to one aspect, a mixed-signal tuner for analog and digital TV reception incorporates a demodulator for analog TV, employing various features for resolving limitations of the analog circuitry and for achieving compatibility with various global TV standards. Such features, which may be present in one or more embodiments, include the use of a variable sample rate in all digital clocks for frequency planning, and use of a microcontroller (MCU) to control various circuitry of the tuner.
    Type: Application
    Filed: June 29, 2009
    Publication date: December 30, 2010
    Inventors: Alan Hendrickson, David Trager, Mitch Reid, Li Gao, John Khoury