Patents by Inventor Christopher J. Hansen

Christopher J. Hansen 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).

  • Publication number: 20140126397
    Abstract: In order to facilitate communication between an electronic device and another electronic device, the electronic device determines communication-quality metrics for a first connection in a wireless network based on received information from the other electronic device. Then, the electronic device calculates an overall communication-quality indicator for the first connection based on at least some of the communication-quality metrics. Moreover, the electronic device dynamically adapts the communication with the other electronic device based on the overall communication-quality indicator. For example, the electronic device may establish a second connection in a cellular-telephone network and may use the second connection to communicate with the other electronic device.
    Type: Application
    Filed: April 2, 2013
    Publication date: May 8, 2014
    Applicant: Apple, Inc.
    Inventors: Christopher J. Hansen, Kee-Bong Song, Syed A. Mujtaba, Vinay R. Majjigi, Xiaowen Wang
  • Publication number: 20140106678
    Abstract: Protocol adaptation layer for wireless communications. Communication devices that include one or more radio modules operable in accordance with multiple communication protocols establish communications using one communication protocol and then switch to another communication protocol. This switching to another communication protocol may be performed based on a variety of factors including effectuating communications of higher throughput, supporting uni-directional communications vs. bi-directional communications, or any other desired factor. In some embodiments, various communication devices include two radio modules that are each implemented to operate in accordance with one particular communication protocol. Alternatively, a multi-protocol capable radio module may support and operate in accordance with more than one communication protocol. Examples of possible communication protocols include those compliant with Bluetooth, IEEE 802.11, and/or 802.15.3c.
    Type: Application
    Filed: December 26, 2013
    Publication date: April 17, 2014
    Applicant: BROADCOM CORPORATION
    Inventors: Saishankar Nandagopalan, Christopher J. Hansen
  • Publication number: 20140105202
    Abstract: Method and system encodes a signal according to a code rate that includes a ratio of uncoded bits to coded bits. An outer encoder encodes the signal into code words. An interleaver converts the code words into a byte sequence for wireless transmission. An inner encoder executes a convolutional code to generate an encoded signal. The encoded signal is transmitted over a plurality of subcarriers associated with a wide bandwidth channel having a spectral efficiency associated with the code rate. The outer encoder includes a Reed-Solomon encoder having a rate that increases the code rate of uncoded bits to coded bits.
    Type: Application
    Filed: December 18, 2013
    Publication date: April 17, 2014
    Applicant: BROADCOM CORPORATION
    Inventors: Christopher J. Hansen, Jason Alexander Trachewsky, Rajendra T. Moorti
  • Publication number: 20140098956
    Abstract: An integrated circuit radio transceiver and associated method comprises a multi-mode device operable to support personal area network communications as well as traditional wireless local area network communications. In one embodiment, IEEE 802.11 protocol IBSS communications are used to transport Bluetooth communication data packets. In another embodiment, a direct link comprising direct packet transfers without beaconing is performed between the multi-mode device and another multi-mode device. Thus, the multi-mode device is operable to establish traditional BSS communications with an Access Point in addition to establishing peer-to-peer communications with another multi-mode device to transport the Bluetooth communications over the 802.11 IBSS communication link or over an IEEE 802.11 direct communication link.
    Type: Application
    Filed: December 12, 2013
    Publication date: April 10, 2014
    Applicant: Broadcom Corporation
    Inventors: Christopher J. Hansen, Henry Ptasinski
  • Publication number: 20140077994
    Abstract: Information may be communicated between two or more wireless devices via adaptive or steered antennas or antenna systems and 60 GHz signals. The adaptive or steered antennas or antenna systems may be initialized based upon location information determined from a beacon signal and/or a reference system. The beacon signal may be swept through an angle and may be utilized along with reference system information to determine the direction and/or distance between the two or more wireless devices. Spatial relationships between the two or more wireless devices may vary. The two or more wireless devices may communicate and coordinate communications between them via alternate lower frequency signals.
    Type: Application
    Filed: November 20, 2013
    Publication date: March 20, 2014
    Applicant: BROADCOM CORPORATION
    Inventors: Christopher J. Hansen, Jeyhan Karaoguz
  • Patent number: 8644284
    Abstract: Provided is dual mode operation by a communicating device in wireless network. The communicating device selects a radio frequency (RF) channel and a physical layer type. The communicating device processes signals received via the selected RF channel based on the selected physical layer type. The communicating device may determine whether a beacon frame has been detected base on the signals that were received via the selected RF channel and processed based on the selected physical layer type. When a frame is not detected, the communicating device may determine a signal energy level for the received signals. The communicating device may establish an association with an existing network based on detection of the beacon frame or the communicating device may transmit an originating beacon frame based on the determined signal energy level.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: February 4, 2014
    Assignee: Broadcom Corporation
    Inventors: Jason A. Trachewsky, Christopher J. Hansen, Jeyhan Karaoguz, Saishankar Nandagopalan
  • Patent number: 8644770
    Abstract: Protocol adaptation layer for wireless communications. Communication devices that include one or more radio modules operable in accordance with multiple communication protocols establish communications using one communication protocol and then switch to another communication protocol. This switching to another communication protocol may be performed based on a variety of factors including effectuating communications of higher throughput, supporting uni-directional communications vs. bi-directional communications, or any other desired factor. In some embodiments, various communication devices include two radio modules that are each implemented to operate in accordance with one particular communication protocol. Alternatively, a multi-protocol capable radio module may support and operate in accordance with more than one communication protocol. Examples of possible communication protocols include those compliant with Bluetooth, IEEE 802.11, and/or 802.15.3c.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: February 4, 2014
    Assignee: Broadcom Corporation
    Inventors: Saishankar Nandagopalan, Christopher J. Hansen
  • Patent number: 8630367
    Abstract: Methods, devices and systems for wireless communication generate signals by determining whether legacy devices are within a proximal region of the wireless communication. When at least one legacy device is within the proximal region, a frame is formatted to include a preamble field, a signal field, and a data field. Further, the uncoded bits are encoded according to a coding format. The coding format is determined according to bits in the preamble and applicable sub-field lengths.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: January 14, 2014
    Assignee: Broadcom Corporation
    Inventors: Christopher J. Hansen, Jason Alexander Trachewsky, Amit G. Bagchi, George Kondylis
  • Patent number: 8620368
    Abstract: A first device wirelessly transmits and/or receives swept 60 GHz beacon signals to and/or from other devices. Beacon signals indicate angle of reception and/or relative direction with respect to other devices. Knowing reception angle and/or relative direction enables beamforming of adaptive and/or steered antennas for communication. 60 GHz beacons are swept over one or more angles. Identity information, configuration information, timing information and/or spatial information are communicated via 60 GHz beacons. Control and/or coordination information are transmitted and/or received. Reception angle, relative direction and/or distance between devices are determined based on 60 GHz beacons. Adaptive and/or steered antennas used for communication are initialized and/or undergo beamforming for 60 GHz, based on the angle, direction and/or distance between devices. Devices are mobile and/or stationary.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: December 31, 2013
    Assignee: Broadcom Corporation
    Inventors: Christopher J. Hansen, Jeyhan Karaoguz
  • Patent number: 8611821
    Abstract: An adaptive communication device includes a transceiver that communicates with a first remote communication device in a millimeter wave frequency band in accordance with a first protocol. The transceiver generates conflict detection signals based on signals received from a second remote communication device that communicates in accordance with a second protocol. A conflict detection module detects communication by the second communication device based on the conflict detection signals and generates a model trigger signal in response thereto. A conflict modeling module responds to the model trigger signal by generating idle prediction data based on the conflict detection signals, wherein the idle prediction data predicts an idle period in the communications by the second remote communication device.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: December 17, 2013
    Assignee: Broadcom Corporation
    Inventors: Saishankar Nandagopalan, Jeyhan Karaoguz, Jason A. Trachewsky, Vinko Erceg, Matthew J. Fischer, Christopher J. Hansen, Murat Mese
  • Publication number: 20130308486
    Abstract: A method for receiving a frame in a high data throughput wireless local area network begins by receiving a preamble of the frame via a channel in accordance with a default receiver filter mask. The processing continues by validating the preamble. The processing continues by, when the preamble is validated, interpreting the preamble to determine a high data throughput channel configuration. The processing continues by reconfiguring the default receiver filter mask in accordance with the high data throughput channel configuration to produce a reconfigured receiver filter mask. The processing continues by receiving a data segment of the frame in accordance with the reconfigured receiver filter mask.
    Type: Application
    Filed: July 24, 2013
    Publication date: November 21, 2013
    Applicant: Broadcom Corporation
    Inventors: Rajendra Tushar Moorti, Christopher J. Hansen, Jason A. Trachewsky
  • Patent number: 8588283
    Abstract: A method and system for frame formats for MIMO channel measurement exchange is provided. Aspects of a method for communicating information in a communication system may comprise transmitting data via a plurality of radio frequency (RF) channels utilizing a plurality of transmitting antenna, receiving feedback information via at least one of a plurality of RF channels, and modifying a transmission mode based on the feedback information. Aspects of a method for communicating information in a communication system may also comprise receiving data via a plurality of receiving antenna, transmitting feedback information via at least one of the plurality of RF channels, and requesting modification of a transmission mode for the received data in transmitted response messages comprising the feedback information.
    Type: Grant
    Filed: April 4, 2013
    Date of Patent: November 19, 2013
    Assignee: Broadcom Corporation
    Inventors: Christopher J. Hansen, Carlos H. Aldana, Joonsuk Kim
  • Patent number: 8577416
    Abstract: A wireless transceiver includes an antenna array that transmits an outbound RF signal containing outbound data to remote transceivers and that receives an inbound RF signal containing inbound data from the remote RF transceivers, wherein the antenna array is configurable based on a control signal. An antenna configuration controller generates the control signal to configure the antenna array to hop among a plurality of radiation patterns based on a hopping sequence. An RF transceiver section generates the outbound RF signal based on the outbound data and that generates the inbound data based on the inbound RF signal. In one configuration, a switching section selectively couples a selected one of the antennas in the array to the RF transceiver section, based on the control signal. In another configuration, the RF transceiver section includes an RF section for each antenna in the array.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: November 5, 2013
    Assignee: Broadcom Corporation
    Inventors: Saishankar Nandagopalan, Jeyhan Karaoguz, Jason A. Trachewsky, Vinko Erceg, Christopher J. Hansen, Matthew James Fischer, Murat Mese
  • Patent number: 8576695
    Abstract: A method for generating a preamble of a frame for a multiple input multiple output (MIMO) wireless communication begins by, for each transmit antenna, generating a carrier detect field. The method continues by, for a first grouping of the transmit antennas, generating a first guard interval, and at least one channel sounding field. Continuing, the method applies cyclical shift prior to transmission via the first grouping of the transmit antennas. When the MIMO wireless communication includes more than the first grouping of the transmit antennas, for another grouping of the transmit antennas. For the another grouping of the transmit antennas, generating at least one other channel sounding field. The method proceeds by generating the first guard interval prior to the at least one other channel sounding field, and applying another cyclical shift prior to transmission via the another grouping of the transmit antennas.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: November 5, 2013
    Assignee: Broadcom Corporation
    Inventors: Christopher J. Hansen, Jason A. Trachewsky, Rajendra Tushar Moorti, Matthew James Fischer, Christopher Young
  • Patent number: 8548087
    Abstract: A method for configuring a multiple input multiple output (MIMO) wireless communication begins by generating a plurality of preambles for a plurality of transmit antennas. Each of the plurality of preambles includes a carrier detection sequence at a legacy transmit rate, a first channel sounding at the legacy transmit rate, a signal field at the legacy transmit rate, and Z?1 channel soundings at a MIMO transmit rate, where L corresponds to a number of channel soundings. The method continues by simultaneously transmitting the plurality of preambles via the plurality of transmit antennas.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: October 1, 2013
    Assignee: Broadcom Corporation
    Inventors: Jason A. Trachewsky, Rajendra Tushar Moorti, Christopher J. Hansen
  • Patent number: 8520669
    Abstract: A method for receiving a frame in a high data throughput wireless local area network begins by receiving a preamble of the frame via a channel in accordance with a default receiver filter mask. The processing continues by validating the preamble. The processing continues by, when the preamble is validated, interpreting the preamble to determine a high data throughput channel configuration. The processing continues by reconfiguring the default receiver filter mask in accordance with the high data throughput channel configuration to produce a reconfigured receiver filter mask. The processing continues by receiving a data segment of the frame in accordance with the reconfigured receiver filter mask.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventors: Rajendra Tushar Moorti, Christopher J. Hansen, Jason A. Trachewsky
  • Publication number: 20130137385
    Abstract: A wireless transceiver includes an antenna array that transmits an outbound RF signal containing outbound data to remote transceivers and that receives an inbound RF signal containing inbound data from the remote RF transceivers, wherein the antenna array is configurable based on a control signal. An antenna configuration controller generates the control signal to configure the antenna array to hop among a plurality of radiation patterns based on a hopping sequence. An RF transceiver section generates the outbound RF signal based on the outbound data and that generates the inbound data based on the inbound RF signal. In one configuration, a switching section selectively couples a selected one of the antennas in the array to the RF transceiver section, based on the control signal. In another configuration, the RF transceiver section includes an RF section for each antenna in the array.
    Type: Application
    Filed: January 25, 2013
    Publication date: May 30, 2013
    Applicant: BROADCOM CORPORATION
    Inventors: Saishankar Nandagopalan, Jeyhan Karaoguz, Jason A. Trachewsky, Vinko Erceg, Christopher J. Hansen, Matthew James Fischer, Murat Mese
  • Publication number: 20130129000
    Abstract: A method for feeding back transmitter beamforming information from a receiving wireless communication device to a transmitting wireless communication device includes a receiving wireless communication device receiving a preamble sequence from the transmitting wireless device. The receiving wireless device estimates a channel response based upon the preamble sequence and then determines an estimated transmitter beamforming unitary matrix based upon the channel response and a receiver beamforming unitary matrix. The receiving wireless device then decomposes the estimated transmitter beamforming unitary matrix to produce the transmitter beamforming information and then wirelessly sends the transmitter beamforming information to the transmitting wireless device.
    Type: Application
    Filed: December 28, 2012
    Publication date: May 23, 2013
    Applicant: BROADCOM CORPORATION
    Inventors: Matthew J. Fischer, Joonsuk Kim, Christopher J. Hansen, Jason A. Trachewsky
  • Patent number: 8437419
    Abstract: A method and system for frame formats for MIMO channel measurement exchange is provided. Aspects of a method for communicating information in a communication system may comprise transmitting data via a plurality of radio frequency (RF) channels utilizing a plurality of transmitting antenna, receiving feedback information via at least one of a plurality of RF channels, and modifying a transmission mode based on the feedback information. Aspects of a method for communicating information in a communication system may also comprise receiving data via a plurality of receiving antenna, transmitting feedback information via at least one of the plurality of RF channels, and requesting modification of a transmission mode for the received data in transmitted response messages comprising the feedback information.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: May 7, 2013
    Assignee: Broadcom Corporation
    Inventors: Christopher J. Hansen, Carlos H. Aldana, Joonsuk Kim
  • Patent number: 8437362
    Abstract: A method for asymmetrical MIMO wireless communication begins by determining a number of transmission antennas for the asymmetrical MIMO wireless communication. The method continues by determining a number of reception antennas for the asymmetrical MIMO wireless communication. The method continues by, when the number of transmission antennas exceeds the number of reception antennas, using spatial time block coding for the asymmetrical MIMO wireless communication. The method continues by, when the number of transmission antennas does not exceed the number of reception antennas, using spatial multiplexing for the asymmetrical MIMO wireless communication.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: May 7, 2013
    Assignee: Broadcom Corporation
    Inventors: Christopher J. Hansen, Jason A. Trachewsky, Nambirajan Seshadri, Kelly Brian Cameron, Hau Thien Tran, Ba-Zhong Shen