Patents Assigned to Broadcom Corporation
  • Patent number: 8519966
    Abstract: A touch screen can be used in a communication device having a transceiver that communicates radio frequency (RF) signals with at least one remote station. The touch screen includes a display layer for displaying information. An inductor grid includes a plurality of inductive elements. A switch matrix selects a selected inductive element in response to a selection signal. A driver generates the selection signal and drives the selected inductive element to detect a touch object in proximity to the selected inductive element and generates touch screen data in response thereto. Microelectromechanical system (MEMS) capacitors couple together a group of the plurality of inductive elements to form an antenna and further couple the antenna to the transceiver to send and receive the RF signals.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 8520400
    Abstract: An integrated circuit includes a substrate. A first integrated circuit die includes a first circuit and a first intra-chip clock interface that transmits a first clock signal via the substrate. A second integrated circuit die includes a second circuit that operates based on the first clock signal and a second intra-chip clock interface that recovers the first clock signal from the substrate.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 8520576
    Abstract: Explicit feedback format within single user, multiple user, multiple access, and/or MIMO wireless communications. A beamformer provides a first communication to a beamformee, and based thereon, the beamformee may ascertain certain characteristics associated with the type and format of feedback to be provided to the beamformee via a second communication from the beamformee to the beamformer. For example, the first communication may include indication of a current operational mode, such as whether it is in accordance with single-user multiple input multiple output (SU-MIMO) or multi-user multiple-input-multiple-output (MU-MIMO). Also, the first communication may indicate a requested steering matrix's rank to be employed in accordance with subsequent beamforming by the beamformer. Also, additional information such as that pertaining to per-tone SNR values for each respective space-time stream, per-tone or per-sub-band eigen-values, the particular channel width being employed (e.g., 20, 40, 80, or 160 MHz), etc.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventors: Joonsuk Kim, Ron Porat, Vinko Erceg
  • Patent number: 8521110
    Abstract: A communication device includes an RF transceiver for communicating first data with at least one of a plurality of remote communication devices via a first protocol and a first frequency band. A millimeter wave transceiver communicates second data with at least one of the plurality of remote communication devices via a second protocol and a second frequency band. A communication control module coordinates the communication of the first data and the second data with the at least one of the plurality of remote communication devices and for establishing a mesh network between the communication device and the plurality of remote communication devices.
    Type: Grant
    Filed: February 18, 2013
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8520517
    Abstract: Aspects of a switch fabric end-to-end congestion avoidance mechanism are presented. Aspects of a system for end-to-end congestion avoidance in a switch fabric may include at least one circuit that enables reception of a congestion notification message that specifies a traffic flow identifier. The circuitry may enable increase or decrease of a current rate for transmission of data link layer (DLL) protocol data units (PDU) associated with the specified traffic flow identifier as a response to the reception of the congestion notification message.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventors: Bruce H. Kwan, Puneet Agarwal
  • Patent number: 8520737
    Abstract: A video processing system includes a video encoder that encodes a video stream into an independent video layer stream and a first dependent video layer stream that requires the independent video layer for decoding. A scrambling module scrambles the independent video layer stream to produce a scrambled independent video layer stream and leaves the first dependent video layer stream unscrambled.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventors: Stephen E. Gordon, Sherman (Xuemin) Chen, Michael Dove, David Rosmann, Thomas J. Quigley, Jeyhan Karaoguz
  • Patent number: 8520756
    Abstract: Physical layer (PHY) sub-channel processing. A soft symbol decision stream is arranged into a number of sub-channels to reduce substantially the processing performed within a communication receiver on data that is not intended for that communication receiver. In other embodiments, a predetermined approach is employed to arrange the soft symbol decision stream into one or more frames; each frame may have one or more soft symbol blocks; and each soft symbol block may have one or more symbols. Each of the soft symbol blocks, within a frame, may be assigned to a sub-channel. Only the soft symbol blocks that contain information destined for the communication receiver need be decoded. Only the sub-channel that includes these soft symbol blocks, destined for this communication receiver, need be decoded. The soft symbol blocks not within the sub-channel may be discarded thereby recovering some of the processing capabilities of the communication receiver.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventors: Steven T. Jaffe, Stephen Edward Krafft
  • Patent number: 8520715
    Abstract: A system for performing adaptive multi-carrier code division multiple access (AMC-CDMA) is provided. The system determines a channel performance metric for each of a plurality of carriers and then determines at least one AMC-CDMA parameter for each of the carriers based on the channel performance metric. Modulator circuitry then modulates the signal on each carrier using the specified AMC-CDMA parameters for transmission over a wired connection.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventors: Jose Abad Molina, Juan Carlos Riveiro Insua, Jonathan Ephraim David Hurwitz
  • Patent number: 8522121
    Abstract: Communications between at communication devices, sometimes including at least one redundant transmission from a transmitter to a receiver, undergo low complexity error correction. CRC may be employed in conjunction with using any desired type of ECC or using uncoded modulation. Based on CRC determined bit-errors, as few as a singular syndrome associated with a singular bit-error or a linear combination of syndromes associated with two or more singular bit-errors within two or more received signal sequences are employed to perform error correction of the received signal. Real time combinations of multiple syndromes associated with respective single bit-errors (that may themselves be calculated off-line) are employed in accordance with error correction. In addition to CRC, any ECC may be employed including convolutional code, RS code, turbo code, TCM code, TTCM code, LDPC code, or BCH code.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventor: Robert W. Zopf
  • Patent number: 8521997
    Abstract: A method for conditionally performing a SIMD operation causing a predetermined number of result objects to be held in a combination of different ones of a plurality of destination stores, the method comprising receiving and decoding instruction fields to determine at least one source store, a plurality of destination stores and at least one control store, said source and destination stores being capable of holding one or a plurality of objects, each object defining a SIMD lane. Conditional execution of the operation on a per SIMD lane basis is controlled using a plurality of pre-set indicators of the at least one control store designated in the instruction, wherein each said pre-set indicator i controls a predetermined number of result lanes p, where p takes a value greater than or equal to two. A predetermined number of result objects are sent to the destination stores such that the predetermined number of result objects are held by a combination of different ones of the plurality of destination stores.
    Type: Grant
    Filed: October 11, 2006
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventor: Sophie Wilson
  • Patent number: 8520549
    Abstract: A mobile communication device includes a first wireless transceiver that receives a first inbound RF signal and that transmits a first outbound RF signal based on a first power supply signal. A second wireless transceiver receives a second inbound RF signal and that transmits a second outbound RF signal based on a second power supply signal. A processing module generates at least one power mode signal based on first transmit power control data received via the first inbound RF signal. A power management circuit adjusts a first power consumption parameter of the first power supply signal and a second power consumption parameter of the second power supply signal based on the at least one power mode signal.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 8521178
    Abstract: A multi-radio mobile device comprises a plurality of different radios. When a location update occurs, the multi-radio mobile device, at a specific location, acquires location-based radio information from a remote location server. The multi-radio mobile device selects a radio for use in the specific location based on the acquired location-based radio information comprising available radios in the specific location and radio weights. The radio is selected from the available radios based on the radio weights in the specific location. Transmissions of a desired service are received in the specific location utilizing the selected radio. Location-based radio measurements reports to the remote location server are generated utilizing signal strength measurements for the received signals. Radio quality information of the available radios is calculated by the location server utilizing location-based radio measurement reports from associated users.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventors: Charles Abraham, Mark Buer, David Garrett, Jeyhan Karaoguz, David Albert Lundgren, David Murray
  • Patent number: 8519878
    Abstract: Techniques and devices provide analog-to-digital conversion at two or more signal frequencies or frequency bands and can be used to construct multi-mode analog-to-digital converters in various circuits, including receivers and transceivers for wireless communications and radio broadcast environments. Adjustable analog-to-digital converters based on the described techniques can be configured to adjust circuit parameters to adapt the technical specifications of different input signals at different signal frequencies or frequency bands, such as FM, HD-radio, and DAB radio signals in radio receiver applications.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventors: Henrik Tholstrup Jensen, Jianhua Gan, Seema Anand, Aminghasem Safarian
  • Patent number: 8520553
    Abstract: A system, method and apparatus for reducing a power consumed by a physical layer device (PHY). A length of a cable connecting the PHY to a link partner is determined. Based on the length, power provided to one or more components of the PHY, or any portion thereof, is reduced. The power provided is reduced while maintaining a level of reliability specified by a protocol governing operation of the PHY. The length can be determined using time-domain reflectometry (TDR) techniques. Any portion of an echo cancellation filter, a crosstalk filter, an equalizer, a precoder, an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), a forward error correction (FEC) decoder and/or an FEC coder can be powered-down or power-optimized to reduce the overall power consumed by the PHY. The protocol governing operation of the PHY can be IEEE 802.3.
    Type: Grant
    Filed: November 11, 2010
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventors: Nariman Yousefi, Scott Powell
  • Patent number: 8521100
    Abstract: A configurable transceiver includes an RF receiver section that generates at least one downconverted signal from a received RF signal. A receiver processing module processes at least one downconverted signal in a plurality of receiver stages to produce a stream of inbound data, wherein the receiver processing module is configurable in response to a control signal to selectively bypass at least one of the plurality of receiver processing stages. A transmitter processing module processes outbound data in a plurality of transmitter stages to produce at least one baseband signal, wherein the receiver processing module is configurable in response to the control signal to selectively bypass at least one of the plurality of transmitter processing stages. An RF transmitter section generates at least one RF signal from the at least one baseband signal.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8520786
    Abstract: A receiver includes a sample and hold module, a discrete time filter module, and a conversion module. The sample and hold module includes a sample switching module, an impedance module, and a hold switching module. The sample switching module outputs samples of an inbound wireless signal in accordance with a sampling clock signal. The impedance module temporarily stores the samples. The hold switching module outputs a filtered representation of the samples in accordance with a hold clock signal to produce a frequency domain sample pulse train, wherein a filter response of the sample and hold module is in accordance with a ratio between the sampling clock signal and the hold clock signal. The discrete time filter module, which may be programmable, filters the frequency domain sample pulse train. The conversion module, which may be programmable, converts the filtered sample pulse into an inbound baseband signal.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza (Reza) Rofougaran, Hooman Darabi
  • 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
  • Patent number: 8520585
    Abstract: Aspects of multicast retry in a communication network includes a terminal device serving as an originator station device within a multicast group configured to provide transmission of one or more protocol data units via a network utilizing a multicast address. Subsequent to transmission of the one or more protocol data units, the terminal device may receive an acknowledgment protocol data unit via one of many destination terminal devices configured to serve as a responder. The received acknowledgment protocol data unit provides a basis to determine whether the transmitted protocol data units were successfully received by one or more destination terminal devices. One or more of the protocol data units may be retransmitted based on the determination. Also, following retransmission, a supplemental acknowledgment protocol data unit may be provided via a destination terminal device of the destination terminal devices exclusive of the responder destination terminal device.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventor: Matthew J. Fischer
  • Publication number: 20130215887
    Abstract: Aspects of a method and system for energy-efficiency-based packet classification are provided. In this regard, a network link for communicating a packet may be selected based, at least in part, on an amount of energy required to communicate the packet over the network link, and based, at least in part, on an energy efficiency class to which the packet is assigned. The energy efficiency class may be determined based on one or more fields of the packet, wherein the fields may comprise one or more of an Ethertype field, a type of service header of an IP datagram, and a field pre-pended or appended to a payload of the packet. In this regard, during or subsequent to generation of the packet, the packet may be marked such that a network path traversed by the generated packet may be determined based on the energy required to communicate the packet over the network path.
    Type: Application
    Filed: April 2, 2013
    Publication date: August 22, 2013
    Applicant: Broadcom Corporation
    Inventor: Broadcom Corporation
  • Publication number: 20130214353
    Abstract: A FET includes a gate dielectric structure associated with a single gate electrode, the gate dielectric structure having at least two regions, each of those regions having a different effective oxide thickness, the FET further having a channel region with at least two portions each having a different doping profile. A semiconductor manufacturing process produces a FET including a gate dielectric structure associated with a single gate electrode, the gate dielectric structure having at least two regions, each of those regions having a different effective oxide thickness, the FET further having a channel region with at least two portions each having a different doping profile.
    Type: Application
    Filed: February 16, 2012
    Publication date: August 22, 2013
    Applicant: Broadcom Corporation
    Inventor: Akira ITO