Patents Assigned to Broadcom
  • Patent number: 8320286
    Abstract: Aspects of an infrastructure offload wake on wireless LAN (WOWL) are described. An aspect of the system may include a networked device, or station, which may communicate one or more filters to an infrastructure networking device. The infrastructure networking device may utilize the filters to perform pattern matching operations on frames or packets received from the network for delivery to at least the station while the station is in an inactive, or low-power, state. When pattern matching operations performed at the infrastructure networking device indicate receipt of a frame or packet on behalf of the inactive station, which matches at least one of the filters, the infrastructure networking device may store an indication value. The indication value may denote receipt of at least one frame or packet that matched at least one of the filters, which were communicated to the infrastructure networking device by the station.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventor: Henry Ptasinski
  • Patent number: 8320487
    Abstract: Aspects of a method and system for adaptation between different closed loop, open loop and hybrid techniques for multiple antenna systems may include a transmitting station that enables generation of a plurality of signals that are concurrently transmitted via a communication medium based on a selected one of: full feedback information, reduced quantity feedback information, or no feedback information. The selection may be determined at the transmitting station based on a determined Doppler shift frequency.
    Type: Grant
    Filed: June 25, 2008
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventors: Vinko Erceg, Mark Kent, Joonsuk Kim
  • Patent number: 8320857
    Abstract: Methods and systems for loop-through for multi-band TV tuners and set-top box and/or TV set applications are disclosed and may include generating master and slave output signals from one or more low-noise amplifiers including master and slave stages. The master and slave stages may include parallel-coupled gain paths. Gate terminals and source terminals of input transistors for the master and slave stages may be directly coupled. The input transistors for the master and slave stages may share an inductor coupled to the source terminals and to ground. The master and slave stages may include cascode stages. VHF and UHF signals may be amplified in the multi-band receiver. The generated master output signal may be processed in the multi-band receiver, and may be utilized to generate I and Q output signals. A plurality of the slave output signals may be summed and communicated to a receiver external to the multi-band receiver.
    Type: Grant
    Filed: November 17, 2009
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventors: Aristeidis Kyranas, Hamed Peyravi, Konstantinos Vavelidis, Nikolaos Kanakaris
  • Patent number: 8321169
    Abstract: Aspects of a method and system for compensating temperature readings from a temperature sensing crystal integrated circuit are provided. An electronic device may digitize a temperature indication received from a temperature sensing circuit, digitize one or more calibration voltages received from said temperature sensing circuit, and calculate a compensated temperature indication utilizing the digitized calibration voltage(s), and the digitized temperature indication, and data from a table that characterizes behavior of the temperature sensing circuit as a function of temperature. One or more circuits in the electronic device may be controlled based on the compensated temperature indication. The compensated temperature indication may compensate for a gain error and/or offset error of a digital to analog converter that digitizes the temperature indication and the calibration voltage(s). There may be two calibration voltages.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventors: Todd Brooks, Vinay Chandrasekhar, Josephus Van Engelen, Jared Welz
  • Patent number: 8321570
    Abstract: Methods are disclosed for indirectly monitoring and controlling at least one media peripheral device in a media exchange network by accessing a media management system (MMS) via a first media peripheral (MP) device (e.g., a TV screen) using a user control device (e.g., a remote control). An operation corresponding to a second media peripheral (MP) device (e.g., a digital camera) may be selected via the MMS using the first MP device and the user control device. The operation is then carried out (i.e., performed) by the second MP device. A status of the second MP device may be selected via the MMS using the first MP device and the user control device. The selected status is then displayed on the first MP device.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventors: Jeyhan Karaoguz, James D. Bennett
  • Patent number: 8321695
    Abstract: A system and method for physical layer device enabled power over Ethernet (PoE) processing. A digital PoE control module is included within a physical layer device and is designed to complement an analog PoE control module within a power sourcing equipment. The inclusion of the digital PoE control within the physical layer device reduces the complexity of the power sourcing equipment without sacrificing PoE control features.
    Type: Grant
    Filed: April 19, 2010
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventors: Wael William Diab, Scott Powell
  • Patent number: 8320283
    Abstract: Aspects of a method and system for utilizing Givens rotation expressions for asymmetric beamforming matrices in explicit feedback information are presented. In one aspect of the invention, Givens matrices may be utilized to reduce a quantity of information communicated in explicit feedback information via an uplink RF channel. The explicit feedback information may include specifications for a feedback beamforming matrix that may be utilized when transmitting signals via a corresponding downlink RF channel. The feedback beamforming matrix may represent a rotated version of an un-rotated matrix. The Givens matrices may be utilized to apply one or more Givens rotations to un-rotated matrix. The feedback beamforming matrix may be computed based on a matrix product of a plurality of Givens matrices. The feedback beamforming matrix may be encoded utilizing fewer bits than may be required to encode the un-rotated matrix.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventor: Joonsuk Kim
  • Patent number: 8320844
    Abstract: A configurable radio frequency (RF) transceiver integrated circuit (IC) includes an RF input/output (IO) module, a plurality of switching modules, and a plurality of components. The RF IO module and selected components of the plurality of components are inter-connected via the at least some of the plurality of switching modules based on a configuration instruction to produce at least one of: at least a portion of a receiver and at least a portion of transmitter.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventors: Brima B. Ibrahim, Arya Reza Behzad, Vinko Erceg, John Walley, Jeyhan Karaoguz, David Rosmann
  • Patent number: 8320877
    Abstract: Within a local region, information may be communicated between two or more wireless multimode communication devices (WMCD) comprising 60 GHz band and lower frequency band wireless interfaces. Spatial relationships between devices may vary. The 60 GHz interface may handle location determination operations and data transfers. The lower frequency band may support WPAN, WLAN and may handle coordination of communications and data transfers. The WMCDs may be coupled with a network. Antennas may be directional. Moreover, the spatial orientation of the antennas may be dynamically modified or swept across a specified angle. Furthermore, intelligent and/or adaptive antenna systems may be utilized. The WMCDs may utilize a position and/or time reference system to aid in location determination operations.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventors: Christopher J. Hansen, Jeyhan Karaoguz
  • Patent number: 8320443
    Abstract: A method and a system for providing ISI compensation to an input signal in a bifurcated manner. ISI compensation is provided in two stages, a first stage compensates ISI components induced by characteristics of a transmitter's partial response pulse shaping filter, a second stage compensates ISI components induced by characteristics of a multi-pair transmission channel. First stage ISI compensation is performed in an inverse response filter having a characteristic feedback gain factor K, during system start-up. Second stage ISI compensation is performed by a single DFE in combination with a MDFE operating on tentative decisions output from a Viterbi decoder. As the DFE of the second stage reaches convergence, the feedback gain factor K of the first stage is ramped to zero.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventors: Oscar E. Agazzi, David Kruse, Arthur Abnous, Mehdi Hatamian
  • Patent number: 8321216
    Abstract: Packet loss concealment (PLC) systems and methods are described that use time-warping to merge a concealment signal generated to replace one or more bad frames of an audio signal with a received signal representing one or more subsequent good frames of the audio signal in a manner that avoids signal discontinuity and audible artifacts resulting therefrom. Prediction-based PLC systems and methods are also described that use time-warping to conceal the loss of one or more frames containing a transition region in a manner that will not result in an audible artifact.
    Type: Grant
    Filed: February 23, 2010
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventor: Robert W. Zopf
  • Patent number: 8320249
    Abstract: Aspects of a method and system for controlling network access on a per-flow basis may comprise controlling access to a network by regulating at least one flow comprising one or more ingress packets based on a flow identifier associated with said one or more packets and based on an establishment of flows in said network. The flow identifier may comprise a source IP address, a destination IP address, a source MAC address, a destination MAC address, a network protocol, a source port number, and/or a destination port number. The number of flows permitted for a source and/or a rate at which a source is allowed to establish new flows may be limited. Flows that exceed one or more of these limits may be marked for further processing. Access to the network for the marked flows may be determined based on past and/or present network statistics. Flows received when a node is at capacity may also be marked for processing.
    Type: Grant
    Filed: March 7, 2007
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventor: Bora Akyol
  • Patent number: 8320240
    Abstract: A network device for scheduling packets in a plurality of queues includes a plurality of leaky bucket modules, each of the plurality of leaky bucket mechanisms being associated with one of a plurality of queues and configured to process information based on a predefined bandwidth, a scheduler configured to schedule services of the plurality of queues and a metering module for tracking whether or not the plurality of queues has exceeded a predefined threshold through the leaky bucket modules. If the plurality of queues has exceeded the predefined threshold, the metering module is configured to compute a new bandwidth allocation for each of the plurality of queues, the new bandwidth allocation replacing the predefined bandwidth and being proportional to the predefined bandwidth for each of the plurality of queues.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventors: Bruce H. Kwan, Chien-Hsien Wu
  • Patent number: 8320497
    Abstract: An integrated circuit radio transceiver and method therefor includes an integrated circuit radio transceiver operable to provide specified gain levels and transmit path filter responses to correspond with a selected power spectral density mask. Changes in gain may be provided solely digital gain changes or may include analog gain module gain changes. A transmitter selects from one of at least three masks to reduce or eliminate spectral regrowth out of band to satisfy EVM requirements. Non-symmetric masks may also be selected for special circumstances to prevent out of band spectral regrowth. Additionally, pre-distortion settings are applied to in-band frequencies to correspond to the selected PSD mask.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventor: Arya Reza Behzad
  • Patent number: 8321564
    Abstract: A technique to remotely identify a source of a transaction for transferring content on a home network and to identify a plurality of renderers for rendering the content when transferred. Where multiple pathways are present to transfer the content, remote identification of one or more pathways are also determined to transfer the content. Then, a rendering parameter is determined for each renderer for rendering the content and based on one or more criteria, a renderer is selected for rendering the content, along with the pathway for delivering the content.
    Type: Grant
    Filed: December 24, 2008
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventors: Stephen Ray Palm, Jeyhan Karaoguz, Xuemin Chen
  • Patent number: 8321716
    Abstract: An integrated circuit includes first, second and third circuits, a clock module and a rate adapting module. The first circuit causes frequency dependent noise and is clocked based on a clock signal. The second circuit is rate dependent and is clocked based on an operation dependent clock signal. The third circuit is susceptible to adverse performance when the frequency dependent noise has a component within a given frequency range. The clock module generates a clock signal having a rate such that frequency dependent noise components associated with the clock signal are outside the given frequency range. The rate adapting module is coupled to produce the operation dependent clock signal from the clock signal.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 8320410
    Abstract: Relay devices and sink devices that provide synchronized audio and/or video outputs are described. A relay device receives a first communication packet from a source device. The first communication packet includes a data frame. A timestamp is generated. The timestamp is an estimate of a time at which content defined by the data frame will be “played.” A second communication packet is generated that includes the data frame and the generated timestamp. The second communication packet is transmitted from the relay device. In one implementation, the generated timestamp is received by a plurality of sink devices, and is used to synchronize output signals (e.g., sound and/or video images) of the sink devices. In another implementation, the generated timestamp is received by a sink device, and is used to synchronize an output signal of the sink device with an output signal of the relay device.
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventor: Mattias Per Agren
  • Patent number: 8320841
    Abstract: An integrated circuit radio transceiver and method therefore include circuitry for generating and power amplifying an outgoing RF signal to produce a power amplified outgoing signal, conducting the power amplified outgoing signal down a transmission path that is disposed substantially parallel to a directional coupler formed on a metallization layer of the integrated circuit, producing a sensed signal level sensed in the directional coupler to a power detector and determining the forward output power based upon the sensed signal level.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventor: Payman Hosseinzadeh Shanjani
  • Patent number: 8320855
    Abstract: A power amplifier module includes a first power amplifier, a second power amplifier, and a controlling module. The first power amplifier has an amplification set for optimal efficiency in accordance with most probable transmit power level settings within a transmit power level range. The second power amplifier has an amplification set for optimal efficiency in accordance with the most probable transmit power level settings within the transmit power level range. The controlling module is coupled to: enable one of the first and second power amplifiers to amplify an outbound radio frequency (RF) signal in accordance with a power setting when the power setting is not within the most probable transmit power level settings; and enable at least one of the first and second power amplifiers to amplify the outbound RF signal in accordance with the power setting when the power setting is within the most probable transmit power level settings.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 8320856
    Abstract: Methods and systems for utilizing a leaky wave antenna as a load on a power amplifier are disclosed and may include configuring one or more leaky wave antennas as a load for one or more power amplifiers (PAs) in a wireless device. RF signals may be transmitted via the leaky wave antennas which may be integrated on the chip, a package to which the chip is affixed, or on a printed circuit board to which the chip is affixed. The antennas may include an inductive load and/or a balun for the one or more PAs. The leaky wave antennas may be impedance matched to the PAs. The PAs may amplify a signal to be transmitted, and an output power of the PAs may be configured by controlling a bias voltage for the PAs.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: November 27, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran