Patents Assigned to Broadcom Corporation
  • Patent number: 8295829
    Abstract: A Wireless Local Area Network (WLAN) is operated in conjunction with a wired Local Area Network (wired LAN) to service a premises, e.g., a campus setting. The wired LAN services the wired communication needs of the premises and serves as the wired backbone of the WLAN. A plurality of Wireless Access Points (WAPs) of the WLAN couple to the wired backbone and are serviced by the LAN. With this shared structure, wired network components, e.g., multi-layer switches, manage the operation of WLAN components, i.e., WAPs. Such management includes ensuring that the WAPs provide sufficient bandwidth to support wireless packetized voice communications. Additional management operations include WAP access, wireless terminal registration, and channel resource allocation, among others.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventors: Jeffrey L. Thermond, Richard G. Martin
  • Patent number: 8295824
    Abstract: A management unit allocates network resources multiservice communication devices capable of communicating via a plurality of networks. The management unit includes a communication device interface for facilitating a bidirectional data communication with the multiservice communication devices via a wireless control channel, the bidirectional data communication including outbound control data sent to multiservice communication devices and inbound control data received from at multiservice communication devices. The wireless control channel is separate from the communication between multiservice communication devices and the networks. A network interface receives network resource data from the networks. A management processing unit generates the outbound control data in response. The management processing unit facilities the handoff of a real-time service accessed by the multiservice communication devices via a first network to a second network.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventors: Vinko Erceg, Arya Reza Behzad, David Rosmann, Brima B. Ibrahim, Jeyhan Karaoguz, John Walley
  • Patent number: 8296817
    Abstract: A method and apparatus for coupling a system propagating home networking communications signals over telephone lines to a system propagating television signals over a coaxial cable system to a television device. A three port adapter has a phone line port, a first coaxial cable port and a second coaxial cable port. The first coaxial cable port is coupled to the phone line port through a low pass filter and wideband balun adapted to pass home networking communications signals while being adapted to reject television signals. The first coaxial cable port is also coupled to the second coaxial port through a high pass filter while being adapted to reject home networking communications signals. The phone line port is coupled to the system propagating home networking communications signals. The first coaxial cable port is coupled to the system propagating television signals over coaxial cable. The second coaxial cable port to the television device.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventors: David Fifield, Jason Alexander Trachewsky, John T. Holloway
  • Patent number: 8295768
    Abstract: Aspects of a method and system for selective equalization enablement based on modulation type may be found in a method for processing radio frequency (RF) signals received via a RF channel, detecting a modulation type of at least a portion of the received RF signals, and determining whether to enable or disable an equalization circuit for processing at least a subsequent portion of the received RF signals based on the detected modulation type; and selecting one of a plurality of inputs to a selector based on the detected modulation type, wherein the plurality of inputs comprise the at least a subsequent portion of the received signals and an output signal generated by the equalization circuit.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventors: Brima Ibrahim, Hea Joung Kim, Paul Lettieri
  • Patent number: 8295385
    Abstract: The present invention provides a method and apparatus for initiating a multiple input multiple output (MIMO) communication. The method and apparatus includes processing that begins by transmitting a frame formatted in accordance with a default MIMO active transmitter-receiver antenna configuration to a target receiver. The processing continues by receiving at least one response frame from the target receiver. The processing continues by determining a number of receiver antennas of the target receiver from the at least one response frame.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventor: Jason A. Trachewsky
  • Patent number: 8295782
    Abstract: A method includes determining whether information is to be transmitted via a radio frequency (RF) bus that supports direct intra-device communication between at least three circuits in a millimeter wave frequency band. When the information is to be transmitted via the RF bus, the method determines whether the RF bus is available. When the RF bus is available, the information is converted into RF bus signal, access to the RF bus is secured, and after access to the RF bus is secured, the RF bus signal is transmitted via the RF bus.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 8295378
    Abstract: Various aspects of a method for minimum mean square error soft interference cancellation (MMSE-SIC) based sub-optimal maximum likelihood (ML) detection for a multiple input multiple output (MIMO) wireless system may comprise selecting at least one constellation point in a constellation map based on at least one of a plurality of received symbols. A number of the at least one constellation point may be less than or equal to a number of previously selected constellation points in a previous constellation map. At least one of the plurality of received symbols may be decoded based on the selected at least one constellation point.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventors: Ling Su, George Kondylis
  • Patent number: 8296346
    Abstract: A channel-select decimation filter capable of operating in multiple bandwidth modes includes a first low pass filter stage, a variable gain stage, a subtraction module a second low pass filter stage and a down-sampling module. The first low pass filter stage includes a first programmable delay module for filtering input signals to produce first low pass filtered signals. The variable gain stage applies a programmable gain to the input signals to produce gained input signals. The subtraction module subtracts the first low pass filtered signals from the gain input signals to produce first stage signals. The second low pass filter stage includes a second programmable delay module for filtering the first stage signals to produce channel-selected signals. The first programmable delay module, second programmable delay module and programmable gain are programmed to implement one of the multiple bandwidth modes.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventors: Henrik T. Jensen, Brima B. Ibrahim
  • Patent number: 8295362
    Abstract: Aspects of a method and system for redundancy-based decoding of video content are provided. A bit sequence comprising video content may be decoded in a multilayer process based on a decoding algorithm and at least one physical constraint. The decoding algorithm may be based on the Viterbi algorithm. Whether the bit sequence comprises video content may be determined based on information provided by a portion of a packet header or by packet priority information necessary for enabling quality of service applications. The physical constraint may be based on border, DC component, and/or low frequency continuity between neighboring discrete cosine transform (DCT) blocks. The physical constraint may also be based on the consistency of video data coded by a variable length coding (VLC) operation. At least one physical constraint test may be performed on selected estimated video bit sequences to select a decoded output video bit sequence.
    Type: Grant
    Filed: March 15, 2007
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventors: Arie Heiman, Jeyhan Karaoguz
  • Patent number: 8294822
    Abstract: A video processing device may process video input comprising a plurality of streams, wherein images corresponding to at least some of the plurality of streams may be displayed concurrently. The video processing device may determine, prior to processing of a pixel in one of the plurality of streams whether the pixel comprises one or more keyed video parameters; and if the pixel comprises at least one keyed parameter, one or more other pixels may be selected, and a video parameter corresponding to the at least one keyed video parameter of the pixel may be generated based on the selected one or more other pixels. The generated video parameter may then be utilized instead of the at least one keyed video parameter during the processing of the pixel. This may comprise luma and/or chroma based scaling. Outputs of the processing of the pixel may be post-processed, by clamping at least one of the video parameters.
    Type: Grant
    Filed: August 17, 2010
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventors: Christopher Payson, Timothy Hellman, Ashish Koul
  • Patent number: 8295333
    Abstract: Aspects of a method and system for inter-PCB communication utilizing a spatial multi-link repeater are provided. In this regard, a signal may be transmitted between printed circuit boards via one or more repeaters, wherein the repeaters may frequency shift received signals to generate repeated signals. Each of the repeated signals may be generated by quadrature down-converting said received signal by mixing the received signal with a first LO signal pair, up-converting the down-converted signal by mixing it with a second LO signal pair, and adding or subtracting an in-phase portion and a quadrature-phase portion of the up-converted signal. Each repeated signal may comprise one or more signal components and a phase and/or amplitude of each of the components may be controlled to control a directivity of the repeated signals. The repeater may reside on one of the plurality of printed circuit boards.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8296595
    Abstract: A method and apparatus for regulating transceiver power consumption for a transceiver in a communications network. Data received by the transceiver is monitored to detect the presence or absence of a received data signal. A transceiver state machine is controlled to regulate transceiver power consumption in response to the presence of absence of the data received.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventors: Hoang Tan Tran, Mark Berman
  • Patent number: 8295793
    Abstract: A configuration controller generates one or more control signals based on channel data. The channel data includes requirements data received via the stream of inbound data, wherein the requirements data includes at least one of: a quality of service requirement, and a signal latency limit. A receiver includes an RF receiver section and a receiver processing module that are configured in response to the control signal.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 8294516
    Abstract: The present invention is directed to systems and methods for reducing the distortion of power amplifiers. In particular, methods and systems are described that enable a determination of a pre-distortion correction signal to be determined, which when added to the nominal signal, a reduction in the distortion of the power amplifier results. In addition, methods and systems are described that enable calibration of individual power amplifiers to be accomplished for use with the above described approach. More specifically, the methods and systems are described for use in a MIMO application. These approaches may be applied to on-chip power amplifiers, off-chip power amplifiers, or any combination thereof.
    Type: Grant
    Filed: June 16, 2008
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventors: Christopher Young, Elias Simpson
  • Patent number: 8295532
    Abstract: Methods and systems for wireless headset instant on capability during battery charging are disclosed and may include powering a wireless headset so that it may be operable to transmit/receive wireless signals during charging. The headset may be powered via an external charger and may be coupled to the headset via a USB link. The headset may be powered via one or more internal batteries, and may be independent of a power level of the batteries within the headset. RF and baseband circuitry may be powered for transmitting/receiving wireless signals during charging. The headset may utilize USB power management, and may manage discharge of power from a plurality of internal batteries. The batteries may be decoupled from circuits that enable transmitting/receiving wireless signals during charging. The headset may be powered via the charging device so that the headset may be operable to generate output audio signals during charging.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventors: David Hsu, John Walley
  • Publication number: 20120263321
    Abstract: In a method and system for audio level detection and control, an amplitude of an audio signal may be compared to a threshold and an attenuation applied to the audio signal may be adjusted based on the comparison. In instances that the amplitude of the audio signal is greater than or equal to the threshold the adjustment may comprise increasing a first attenuation factor until the amplitude of the audio signal is less than the threshold. The first attenuation factor may be subsequently decreased until the amplitude of the audio signal is greater than or equal to the threshold or until the first attenuation factor is equal to zero. The attenuation of the audio signal may be controlled via a digital gain circuit within the hardware audio CODEC, wherein an overall attenuation factor of the digital gain circuit is a sum of the first attenuation factor and a second attenuation factor.
    Type: Application
    Filed: June 25, 2012
    Publication date: October 18, 2012
    Applicant: Broadcom Corporation
    Inventors: Nelson Sollenberger, Radhakrishnan Kuzhipatt, Hongwei Kong
  • Publication number: 20120263030
    Abstract: Aspects of a method and system for a programmable interference suppression module may include receiving a communication signal comprising one or more desired signal, and one or more undesired signals. The communication signal may be utilized to generate estimated channel state information. The estimated channel state information may be formatted for use in interference suppression. A reduced interference signal may be generated from a delayed version of said communications signal and the estimated channel state information, wherein the one or more undesired signals may be attenuated. The reduced interference signal may be formatted for post-processing. The desired signals may comprise WCDMA and/or HSDPA signals, and the undesired signals may be inter-cell and/or intra-cell interference. Further processing may comprise HSDPA processing and/or RAKE finger processing. The communication signal may be a Universal Mobile Telecommunication System (UMTS) compliant signal.
    Type: Application
    Filed: June 25, 2012
    Publication date: October 18, 2012
    Applicant: Broadcom Corporation
    Inventors: Mark Hahm, Wei Luo, Thirunathan Sutharsan, Andrew du Preez, Bin Liu, Jun Wu, Severine Catreux-Erceg, Shuangquan Wang
  • Publication number: 20120263262
    Abstract: Embodiments of an apparatus for improving a gain imbalance between an in-phase and quadrature component recovered by a receiver are provided. The apparatus includes a first transition counter configured to count a number of bit transitions in a first sequence of one-bit values provided by a first sigma-delta modulator based on the in-phase component, and a second transition counter configured to count a number of bit transitions in a second sequence of one-bit values provided by a second sigma-delta modulator based on the quadrature component. The apparatus further includes a gain monitor configured to: (1) determine a first and second power level, proportional to a power of the in-phase and quadrature components respectively, using the number of bit transitions in the first and second sequences, and (2) adjust a gain of one of the in-phase and quadrature components based on a ratio between the first and second power levels.
    Type: Application
    Filed: April 14, 2011
    Publication date: October 18, 2012
    Applicant: Broadcom Corporation
    Inventor: Farzad ETEMADI
  • Publication number: 20120263176
    Abstract: Embodiments of a unified communication and control bus architecture for Ethernet and/or PoE systems are provided. Embodiments enable a unified communication and control bus architecture that significantly simplifies communication and control in Ethernet and/or PoE systems. Embodiments enable significant savings both in terms of cost and complexity as the number of communication and control buses is reduced down to one. Embodiments can be used in various Ethernet and/or PoE implementations, including, for example, single PCB-single PoE, single PCB-multiple PoE, chassis-based switch, and stackable-based switch configurations. Further, embodiments can be implemented using standard Ethernet as well as proprietary implementations.
    Type: Application
    Filed: June 29, 2012
    Publication date: October 18, 2012
    Applicant: Broadcom Corporation
    Inventor: Wael William DIAB
  • Patent number: 8289944
    Abstract: An integrated circuit (IC) includes a plurality of circuit modules, a millimeter wave (MMW) transceiver coupled to a configurable antenna structure, and a controller. The controller is operably coupled to: receive parameters for an inter-chip MMW communication link; interpret the parameters to determine a range of operational requirements; compare the range of operational requirements with configuration options of the MMW transceiver and the configurable antenna structure; and, when one of the configuration options compares favorably with the range of operational requirements, generate a configuration signal to instruct the MMW transceiver and the configurable antenna structure to implement the one of the configuration options.
    Type: Grant
    Filed: May 30, 2009
    Date of Patent: October 16, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran