Patents Assigned to Broadcom Corporation
  • Patent number: 8284819
    Abstract: Aspects of a method and system for interference suppression in WCDMA systems may include one or more circuits that are operable to receive a plurality of multipath signals via one or more receiving antennas. A plurality of weighting factor values may be computed based on the received multipath signals. Estimated signals may be based on the weighting factor values. Residual signals may be generated based on received signals and the estimated signals. Addback signals may be generated based on the estimated signals and the residual signals. Updated estimated signals may be generated based on the addback signals and the weighting factor values. Incremental signals may be generated based on the updated estimated signals and addback signals. Updated residual signals may be generated based on the incremental signals and previous residual signals. The interference suppressed signals may be generated based on the updated residual signals and updated estimated signals.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventors: Mark Hahm, Wei Luo, Arkady Molev-Shteiman, Hongwei Kong, Xiao-Feng Qi, Li Fung Chang, Nelson Sollenberger
  • Patent number: 8284798
    Abstract: Provided is a communications interface system. The communications interface system includes one or more protocol modules configured to include interface protocols that facilitate direct communication between a switching subsystem, a physical layer subsystem, and a Power over Ethernet subsystem. The protocol modules are connectable to a communications bus, the direct communication occurring across the communications bus in accordance with the protocols.
    Type: Grant
    Filed: April 11, 2007
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventor: Wael William Diab
  • Patent number: 8283992
    Abstract: A balun that includes a first conductor, a second conductor, and a third conductor. The first conductor has a first length. The first conductor also has a first end connected to a first balanced power amplifier output port. The second conductor has substantially the same first length. The second conductor also includes a first end connected to a second balanced power amplifier output port and a second end connected to a second end of the first conductor. The third conductor has substantially the same first length. The third conductor has a first end connected to an antenna port and a second end connected to a ground potential.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventors: Tom McKay, Vas Postoyalko, Edwin Li
  • Patent number: 8285828
    Abstract: For a platform level data model for indications based event control and data transfer, a management controller may enable performing indications based management operations that may be based on a management service utilizing CIM Indications model. The management controller may enable communication of indications based messaging and/or data. The indications may be triggered based on events generated and/or triggered in a plurality of managed entities. The events generation may be performed dynamically within the plurality of managed entities, or may be initiated via the management controller. The management controller may enable processing of partially generated indications, via the plurality of managed entities, and/or as pass-through router for full indications processed via the plurality of managed entities.
    Type: Grant
    Filed: March 20, 2008
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventor: Hemal Shah
  • Patent number: 8283986
    Abstract: Aspects of a method and system for reduced clock feed-through in a phase locked loop are provided. In this regard, a control voltage for controlling a VCO may be generated via a filter comprising at least one switching element clocked via a clock booster circuit and comprising one or more thick oxide transistors to reduce clock feed-through. A first switching element of the filter may be a first transmission gate comprising thick oxide transistors. The first transmission gate may be part of a sample and hold circuit. A DC voltage on an input node of the sample and hold circuit may be periodically reset via a reset switching element, which may comprise thick oxide transistors. The reset switching element may be controlled via a clock booster circuit. The filter may also comprise a buffer having an input stage comprising one or more thick oxide transistors.
    Type: Grant
    Filed: January 14, 2009
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventor: Stephen Wu
  • Patent number: 8285205
    Abstract: A method and system for a single chip integrated Bluetooth and FM transceiver and baseband processor are provided. The single chip may comprise a Bluetooth radio, an FM radio, a processor system, and a peripheral transport unit (PTU). FM data may be received and/or transmitted via the FM radio and Bluetooth data may be received and/or transmitted via the Bluetooth radio. The FM radio may receive radio data system (RDS) data. The PTU may support digital and analog interfaces. A processor in the processor system may time-multiplex processing of FM data and processing of Bluetooth data. The single chip may operate in an FM-only, a Bluetooth-only, and an FM-Bluetooth mode. The single chip may reduce power consumption by disabling portions of the Bluetooth radio during FM-only mode and/or disabling analog circuitry when performing digital processing. Communication between Bluetooth and FM channels may be enabled via the single chip.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventors: Brima Ibrahim, Mitchell Buznitsky, Ahmadreza Rofougaran, John Walley, Bojko Marholev, Roy Tobin, Prasanna Desai, Angel Polo, Hea Joung Kim, Paul A. Lettieri, Siukai Mak
  • Patent number: 8284867
    Abstract: A preamble of a frame for a multiple input multiple output (MIMO) wireless communication for a first transmit antenna of the MIMO communication includes a legacy preamble portion in accordance with a legacy wireless communication protocol. The preamble of the frame for the MIMO wireless communication for the first transmit antenna also includes a current protocol preamble portion in accordance with a protocol of the MIMO wireless communication. The preamble of a frame for at least a second antenna of the MIMO communication includes a cyclically shifted legacy preamble portion for the frame. The preamble of the frame for the MIMO wireless communication for the second transmit antenna also includes a second current protocol preamble portion in accordance with a protocol of the MIMO wireless communication.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventors: Jason A. Trachewsky, Rajendra Tushar Moorti, Christopher Young, Christopher J. Hansen
  • Patent number: 8285212
    Abstract: A system and method for enabling secure short-range communication. A close proximity transmitter is used that is designed with a relatively poor radiator as compared to a conventional transmitter supporting conventional transmissions such as mobile phone communications, Wi-Fi, or Bluetooth communication. The close-proximity transmitter and the conventional transmitter are selectively activated based on a communication mode.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventors: Robert William Hulvey, John Walley
  • Patent number: 8284704
    Abstract: Methods and systems for utilizing undersampling for crystal leakage cancellation are disclosed and may include undersampling a composite signal comprising a desired signal and leakage signals due to one or more clock signals. Measured DC signals generated by each of the undersampled signals may be reduced by adjusting the phase and/or amplitude of the clock signals. The undersampling may be performed at one or more of the one or more clock signals, or at integer sub-harmonics of the clock signals. The composite signal may include a signal received by a wireless system or a signal to be transmitted by the wireless system. The undersampled signals may be low-pass filtered. The desired signal may include in-phase and quadrature signals or a polar signal. The undersampling may be performed by one or more sample and hold circuits and the clock signals may be generated utilizing one or more crystal oscillators.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8284693
    Abstract: Embodiments for space-time coding are disclosed. One method includes establishing a priority for each of a plurality of data streams. A number of data bits for each of the plurality of data streams are allocated. A desired signal quality for each of the plurality of data streams is determined based on the corresponding priority. Each of the plurality of data streams are modulated according to the allocated number of data bits of each of the plurality of data streams. A space-time code is selected for each of the plurality of data streams based at least partially on the desired signal quality for each of the plurality of data streams, wherein at least one of the space-time codes is at least one of a vector or a matrix. Each of the modulated data streams are space-time coded with the selected space-time code. The space-time coded modulated data streams are summed, and transmitted.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventors: Erik Stauffer, Bertrand Hochwald
  • Patent number: 8285981
    Abstract: Various embodiments are disclosed relating to remote network device provisioning. A method is disclosed, the method comprising discovering a network address associated with a device on a network based on a discovery response received in response to a discovery request provided to the device. One or more configurable boot options associated with the device may be determined based at least in part on the discovery response. One or more of the configurable boot options may be configured on the device, wherein, upon reboot of the device using the configured boot options, a software image is provided to the device.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventors: Simon Assouad, Hemal Shah
  • Patent number: 8284233
    Abstract: A communication device is operable to construct one or more image sequences that correspond to voice information, where the image sequences simulate video streaming via the communication device. The image sequences are synchronized with the voice information during active video based connection via the communication device. The image sequences are generated and/or retrieved within the communication device, and/or retrieved from an external source. At least some of the images may be generated via a secondary device that is communicatively coupled with the communication device. The generated images are stored within the secondary device and/or are stored in a dedicated video support server. The secondary device is operable to communicate the images directly during communication with the communication device and/or to communication information that enable retrieving and/or constructing the image sequences. Alternatively, the communication device is operable to generate the image sequences independently.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventors: James D. Bennett, Jeyhan Karaoguz
  • Patent number: 8283899
    Abstract: An electronic device includes a rechargeable battery, an electrical circuit, a battery safety circuit, and a power down mode circuit. The electrical circuit is configured to generate a power mode control signal. The power down mode circuit receives the power mode control signal. If the power mode control signal has a first value, the power down mode circuit is configured to force a voltage at a first port of the battery safety circuit to a voltage value that is less than an under voltage lock out (UVLO) threshold value of the battery safety circuit to transition the electronic device from a normal operating mode to a low current power down mode. The electronic device may further include a wake up mode circuit.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventors: Domitille Esnard, John Walley, Louis Pandula
  • Patent number: 8285231
    Abstract: Methods and systems for an integrated leaky wave antenna-based transmitter and on-chip power distribution are disclosed, and may include supplying one or more bias voltages and ground for a chip including a plurality of power amplifiers (PAs) utilizing bias voltage and ground lines. One or more leaky wave antennas (LWAs) may be communicatively coupled to the power amplifiers. Wireless signals may be transmitted utilizing the LWAs integrated in the lines in the chip. Radio frequency (RF) signals may be transmitted via the plurality of LWAs. The RF signals may include 60 GHz signals and the LWAs may include microstrip and/or coplanar waveguides. A cavity length of the LWAs may be configured by a spacing between conductive lines in the microstrip and/or coplanar waveguides. The LWAs may be configured to transmit the wireless signals at a desired angle from a surface of the chip.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8284804
    Abstract: An IP network includes a central entity and at least one customer premises equipment (CPE) device. The central entity generates a program clock reference (PCR) clock and provides audio-visual packets to a CPE based on the PCR clock. The CPE sets a first clock based on the PCR clock for decoding operations. The CPE sets a second clock that is independent from the first clock for audio and video output operations. For example, the CPE can process the audio-visual packets using the second clock.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventors: Jeffrey Fisher, Brian Schoner, Rajesh S. Mamidwar
  • Patent number: 8286013
    Abstract: A system and method for providing multi-tiered power save operation in a portable communication device. A portable communication device may be operated in a first power-save mode. A power-save module of the portable communication device may, for example, provide for operation in such a first power-save mode. It may be determined to operate the portable communication device in a second power-save mode that is different than the first power-save mode. A power-save management module may, for example, make such a determination. The portable communication device may then be operated in the second power-save mode. The power-save module may, for example, provide for operation in such a second power-save mode.
    Type: Grant
    Filed: June 24, 2005
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventors: Chun-ying Chen, Pieter Vorenkamp, Neil Y. Kim, Sumant Ranganathan
  • Patent number: 8284703
    Abstract: A method and apparatus of scheduling and transmitting uplink packets within uplink sub-frames of a wireless system is disclosed. The method includes determining a size of a standard data unit, and determining if the standard data unit can be transmitted within a single sub-channel of an uplink frame by comparing the size of the standard data unit with a number of bits that can be transmitted within the uplink frame as determined by an uplink quality. If the standard data unit is too large to be transmitted within a single sub-channel of an uplink frame, then the standard data unit is divided into sub-data units. The sub-data units are transmitted over multiple uplink frames.
    Type: Grant
    Filed: May 17, 2007
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventors: Anuj Puri, Manish Airy, Amar Prakash Azad, Arogyaswami Paulraj
  • Patent number: 8284795
    Abstract: A method for determining differential delay of at least two bonded links is described. The method comprises a step of providing, on the part of a transmitting entity, at least some of the data packets transmitted from the transmitting entity to a receiving entity with time stamps, the time stamps indicating a point of time when a respective data packet has been generated, and a step of deriving a propagation delay from a time stamp of a data packet and a time of arrival of the data packet at a receiving entity. The method further comprises a step of determining a differential delay of a link from the propagation delay of the link and a propagation delay of a reference link.
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventors: Miguel Peeters, Raphael Cassiers, Benoit M. S. Christiaens
  • Patent number: 8285241
    Abstract: A method and apparatus is disclosed to effectively frequency translate a filter characterized as a low quality factor (Q) filter corresponding to a baseband frequency of approximately zero Hertz or to an intermediate frequency (IF) to a filter characterized as a high Q filter at frequencies greater than the baseband frequency or the IF. A downconversion mixer is used to frequency translate a communication signal to the baseband frequency or the IF using a first local oscillator signal to provide a downconverted communication signal. A filter characterized as the low Q filter corresponding to the baseband frequency or the IF filters the downconverted communication signal to provide a filtered communication signal. An upconversion mixer is used to frequency translate a communication signal using a second local oscillator signal, the second local oscillator signal being substantially similar in frequency of the first local oscillator signal.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmad Mirzaei, Mohyee Mikhemar, Hooman Darabi
  • Patent number: 8283722
    Abstract: An apparatus is disclosed to increase a breakdown voltage of a semiconductor device. The semiconductor device includes an enhanced well region to effectively increase a voltage at which punch-through occurs when compared to a conventional semiconductor device. The enhanced well region includes a greater number of excess carriers when compared to a well region of the conventional semiconductor device. These larger number of excess carriers attract more carriers allowing more current to flow through a channel region of the semiconductor device before depleting the enhanced well region of the carriers. As a result, the semiconductor device may accommodate a greater voltage being applied to its drain region before the depletion region of the enhanced well region and a depletion region of a well region surrounding the drain region merge into a single depletion region.
    Type: Grant
    Filed: June 14, 2010
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventor: Akira Ito