Patents by Inventor Bertrand Hochwald

Bertrand Hochwald 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: 11940477
    Abstract: A method of determining electromagnetic exposure values for radiative compliance tests a transmitting device with multiple transmitters or antenna. The device transmits a first set of excitation signals that are chosen in advance. These signals are measured for their electromagnetic exposure values. A second set of excitation signals are then transmitted that are adaptively chosen based on result of a previous measurements of the first excitation signals. The second set of signals are also measured. From the measurements of the predetermined and adaptive signals, the electromagnetic exposure values of all possible transmitted signals are inferred.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: March 26, 2024
    Assignee: University of Notre Dame du Lac
    Inventors: Bertrand Hochwald, Arash Ebadi Shahrivar
  • Publication number: 20200371146
    Abstract: A method of determining electromagnetic exposure values for radiative compliance tests a transmitting device with multiple transmitters or antenna. The device transmits a first set of excitation signals that are chosen in advance. These signals are measured for their electromagnetic exposure values. A second set of excitation signals are then transmitted that are adaptively chosen based on result of a previous measurements of the first excitation signals. The second set of signals are also measured. From the measurements of the predetermined and adaptive signals, the electromagnetic exposure values of all possible transmitted signals are inferred.
    Type: Application
    Filed: January 11, 2019
    Publication date: November 26, 2020
    Inventors: Bertrand Hochwald, Arash Ebadi Shahrivar
  • Patent number: 10819405
    Abstract: A method for managing beam squint in a phased antenna array system operating at millimeter wavelengths using carrier aggregation includes determining a minimum array gain threshold, determining an upper bound for a fractional bandwidth for a fixed number of antennas, and constructing a codebook with a predetermined coverage range based on at least one of an angle of arrival or an angle of departure and further based on the upper bound. The method further includes performing carrier aggregation for the fixed number of antennas and selecting at least two antennas based on the codebook.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: October 27, 2020
    Assignee: University of Notre Dame du Lac
    Inventors: Mingming Cai, J. Nicholas Laneman, Bertrand Hochwald
  • Publication number: 20190173537
    Abstract: A method for managing beam squint in a phased antenna array system operating at millimeter wavelengths using carrier aggregation includes determining a minimum array gain threshold, determining an upper bound for a fractional bandwidth for a fixed number of antennas, and constructing a codebook with a predetermined coverage range based on at least one of an angle of arrival or an angle of departure and further based on the upper bound. The method further includes performing carrier aggregation for the fixed number of antennas and selecting at least two antennas based on the codebook.
    Type: Application
    Filed: December 4, 2018
    Publication date: June 6, 2019
    Inventors: Mingming Cai, J. Nicholas Nicholas Laneman, Bertrand Hochwald
  • Patent number: 9537684
    Abstract: Embodiments of a method and apparatus for performing an adaptive transmission scheme in a frequency division duplexing communication system based on channel state information estimated using an open-loop mode are described herein. In one example, the method includes estimating an impulse response of a channel using a signal received over a first frequency band of the channel from a device, transforming the impulse response into a frequency response of the channel, and subsequently performing the adaptive transmission scheme using the frequency response to transmit a signal to the device over a second frequency band of the channel that is different from the first frequency band.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: January 3, 2017
    Assignee: Broadcom Corporation
    Inventors: Erik Richard Stauffer, Kamlesh Rath, Ying Xia, Bertrand Hochwald
  • Patent number: 9344178
    Abstract: A method of aiding uplink transmission is disclosed. One method includes a base station downlink transmitting signals to at least a first terminal, the transmitted signals directed and conveying data to at least the first terminal. The method further includes a second terminal eavesdropping the transmitted signals, and measuring a signal quality. The second terminal estimates uplink channel information based on the measured signal quality, for aiding uplink transmission. Based at least in part on the estimated transmission channel, the second terminal transmits uplink signals to the base station.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: May 17, 2016
    Assignee: Broadcom Corporation
    Inventors: Bertrand Hochwald, Harold Artes
  • Patent number: 9236975
    Abstract: Methods and apparatuses of a mobile subscriber transmitting information to a base station are disclosed. One method includes identifying an uplink transmission condition. If the uplink transmission condition is identified, the mobile subscriber transmits a message over multiple uplink frames using multiple uplink frame types. The mobile subscriber may inform the base station that it is transmitting the message over the multiple uplink frames.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: January 12, 2016
    Assignee: Broadcom Corporation
    Inventors: Louay Jalloul, Djordje Tujkovic, Bertrand Hochwald
  • Patent number: 9232564
    Abstract: Embodiments provide WiFi and LTE tailored transceiver radio frequency (RF) filtering techniques and configurations to enable coexistence between WiFi and LTE transceivers operating in close proximity. In particular, embodiments provide filtering techniques to reject emissions from LTE into WiFi, and vice versa. The filtering techniques eliminate the need for additional isolation between LTE and WiFi antennas (approximately 50 dB), which is beyond what is achievable in practice. Embodiments can be tailored according to different use cases of the WiFi and LTE transceivers (e.g., fixed CPE, portable router, smart phone with tethering).
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: January 5, 2016
    Assignee: Broadcom Corporation
    Inventors: Kamesh Medapalli, Erik Stauffer, Bertrand Hochwald, William Fujimoto, Joseph Saada, Richard Compton
  • Patent number: 9209876
    Abstract: Embodiments of a method and apparatus for selecting one of several different power constraints under which sets of complex, beam weights are normalized are described herein. The embodiments of the method and apparatus specifically select the power constraint based on a code rate used to encode information carried by a transmit signal weighted by the sets of complex, beam weights. Appropriate selection of the power constraint can improve the bit error rate (BER) or block error rate (BLER) of the decoded transmit signal at a receiver.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: December 8, 2015
    Assignee: Broadcom Corporation
    Inventors: Louay Jalloul, Bertrand Hochwald
  • Patent number: 9210716
    Abstract: A method for managing uplink communication in a wireless communication network is provided. The method includes selecting one or more Mobile Stations (MSs) from a plurality of MSs based on a first signal parameter corresponding to each MS of the one or more MSs, one or more second signal parameters corresponding to each MS of the one or more MSs, and one or more threshold parameters. The first signal parameter is associated with a Base Station (BS) serving a MS. Further, the one or more second signal parameters are associated with one or more BSs neighboring to the MS. The one or more threshold parameters are associated with a communication parameter. Thereafter, the method includes modifying an uplink Modulation and Coding Scheme (MCS) level of the one or more MSs.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: December 8, 2015
    Assignee: BROADCOM CORPORATION
    Inventors: Louay Jalloul, Sriram Mudulodu, Sam P. Alex, Leena Zacharias, Bertrand Hochwald
  • Patent number: 9178597
    Abstract: A method and apparatus of providing a base station with updated transmission channel information is disclosed. The method includes the base station transmitting beamformed signals to a first terminal. A second terminal receives the transmitted beamformed signals, and measures a signal quality. The second terminal conveys back to the base station the measured signal quality, and a transmission identifier of the beamformed data signal.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: November 3, 2015
    Assignee: Broadcom Corporation
    Inventors: Bertrand Hochwald, Harold Artes
  • Publication number: 20150201423
    Abstract: A method for managing uplink communication in wireless communication network is provided. The method includes selecting one or more Mobile Stations (MSs) from a plurality of MSs based on a first signal parameter corresponding to each MS of the one or more MSs, one or more second signal parameters corresponding to each MS of the one or more MSs, and one or more threshold parameters. The first signal parameter is associated with a Base Station (BS) serving a MS. Further, the one or more second signal parameters are associated with one or more BSs neighboring to the MS. The one or more threshold parameters are associated with a communication parameter. Thereafter, the method includes modifying uplink Modulation and Coding Scheme (MCS) level of the one or more MSs.
    Type: Application
    Filed: March 26, 2015
    Publication date: July 16, 2015
    Applicant: Broadcom Corporation
    Inventors: Louay JALLOUL, Sriram MUDULODU, Sam P. ALEX, Leena ZACHARIAS, Bertrand HOCHWALD
  • Patent number: 9026123
    Abstract: A method for managing uplink communication in wireless communication network is provided. The method includes selecting one or more Mobile Stations (MSs) from a plurality of MSs based on a first signal parameter corresponding to each MS of the one or more MSs, one or more second signal parameters corresponding to each MS of the one or more MSs, and one or more threshold parameters. The first signal parameter is associated with a Base Station (BS) serving a MS. Further, the one or more second signal parameters are associated with one or more BSs neighboring to the MS. The one or more threshold parameters are associated with a communication parameter. Thereafter, the method includes modifying uplink Modulation and Coding Scheme (MCS) level of the one or more MSs.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: May 5, 2015
    Assignee: Broadcom Corporation
    Inventors: Louay Jalloul, Sriram Mudulodu, Sam P. Alex, Leena Zacharias, Bertrand Hochwald
  • Patent number: 8942184
    Abstract: A method and apparatus for link adaptation in a wireless communication network is provided. The method includes computing a first channel quality parameter based on one or more channel quality parameters. The one or more channel quality parameters are associated with a communication link between a Mobile Station (MS) and a Base Station (BS). The method further includes determining a qualifying transmission unit to compute a correction parameter. The correction parameter is computed based on the first channel quality parameter and one or more transmission parameters. The one or more transmission parameter is associated with the communication link. Thereafter, the method schedules a transmission mode of the communication link based on a second channel quality parameter. The second channel quality parameter is estimated based the first channel quality parameter and the correction parameter.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: January 27, 2015
    Assignee: Broadcom Corporation
    Inventors: Kameswara Medapalli, Djordje Tujkovic, Kamlesh Rath, Louay Jalloul, Bertrand Hochwald
  • Patent number: 8867459
    Abstract: Methods and apparatuses of a mobile subscriber transmitting information to a base station are disclosed. One method includes identifying an uplink transmission condition. If the uplink transmission condition is identified, the mobile subscriber transmits a message over multiple uplink frames. The mobile subscriber informs the base station that it is transmitting the message over the multiple uplink frames.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: October 21, 2014
    Assignee: Broadcom Corporation
    Inventors: Djordje Tujkovic, Louay Jalloul, Bertrand Hochwald
  • Patent number: 8855046
    Abstract: Embodiments disclose a method of coordinating reception of uplink transmissions in order to reduce interference among transceivers in an OFDM wireless transmission system, or similar communication system, including a number of receivers communicating with one or more basestations in cell or sector arrangements. A basestation within each sector includes an uplink coordinated reception process that imposes coordinated reception techniques across sector or cell boundaries in order to improve uplink transmission quality between target terminals and basestations within each sector.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: October 7, 2014
    Assignee: Broadcom Corporation
    Inventors: Louay Jalloul, Djordje Tujkovic, Vummintala Shashidhar, Bertrand Hochwald, Arogyaswami Paulraj
  • Patent number: 8811918
    Abstract: Various embodiments of the present invention recognize at least two zones of operation for a communication device. In a first zone, which is sufficiently spaced away from a human head or body that SAR limits will be met, transmit power delivered to an antenna of a communication device may be maximized within any other constraints under which the communication device operates. In a second zone, which is not sufficiently spaced away from a human head or body, transmit power is redistributed such that SAR limitations are met without affecting the transmit power control loop of the communication device. For example, a second antenna physically disposed at a different location within the communication device may be used either instead of, or in addition to, the first transmit antenna in order that the SAR limits are met.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: August 19, 2014
    Assignee: Broadcom Corporation
    Inventors: Kamlesh Rath, Erik Stauffer, Rishi Ranjan, Soumen Chakraborty, Manish Airy, Bertrand Hochwald, Robert Lorenz, Richard Compton, Rakesh Agrawal
  • Patent number: 8750236
    Abstract: Embodiments for a method and apparatus of selecting a transmission mode between the subscriber and a base station are disclosed. One method includes determining a predictive window. Instantaneous channel quality measurements are averaged, wherein the averaging is dependent upon a size of the predictive window. A first estimate of the transmission mode is determined based on the averaged instantaneous channel quality measurements. A margin is calculated based on reception of a qualifying downlink transmission. The transmission mode is selected by updating the first estimate with the margin.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventors: Kameswara Medapalli, Djordje Tujkovic, Kamlesh Rath, Louay Jalloul, Bertrand Hochwald
  • Publication number: 20140141732
    Abstract: Embodiments provide WiFi and LTE tailored transceiver radio frequency (RF) filtering techniques and configurations to enable coexistence between WiFi and LTE transceivers operating in close proximity. In particular, embodiments provide filtering techniques to reject emissions from LTE into WiFi, and vice versa. The filtering techniques eliminate the need for additional isolation between LTE and WiFi antennas (approximately 50 dB), which is beyond what is achievable in practice. Embodiments can be tailored according to different use cases of the WiFi and LTE transceivers (e.g., fixed CPE, portable router, smart phone with tethering).
    Type: Application
    Filed: January 24, 2014
    Publication date: May 22, 2014
    Applicant: Broadcom Corporation
    Inventors: Kamesh MEDAPALLI, Erik Stauffer, Bertrand Hochwald, William Fujimoto, Joseph Saada, Richard Compton
  • Patent number: 8681748
    Abstract: Embodiments provide WiFi and WiMAX tailored transceiver radio frequency (RF) filtering techniques and configurations to enable coexistence between WiFi and WiMAX transceivers operating in close proximity. In particular, embodiments provide filtering techniques to reject emissions from WiMAX into WiFi, and vice versa. The filtering techniques eliminate the need for additional isolation between WiMAX and WiFi antennas (approximately 50 dB), which is beyond what is achievable in practice. Embodiments can be tailored according to different use cases of the WiFi and WiMAX transceivers (e.g., fixed CPE, portable router, smart phone with tethering).
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: March 25, 2014
    Assignee: Broadcom Corporation
    Inventors: Kamesh Medapalli, Erik Stauffer, Bertrand Hochwald, William Fujimoto, Yossi (Joseph) Saada, Richard Compton