Patents Assigned to Broadcom
  • Patent number: 8036308
    Abstract: Certain aspects of a method and system for a wideband polar transmitter may be disclosed. Aspects of the method may include polar modulating a plurality of signals by generating a plurality of modulated intermediate frequency (IF) signals corresponding to each of a plurality of wireless communication protocols within a transmitter that handles the plurality of wireless communication protocols. The generated plurality of modulated IF signals may be upconverted to a plurality of radio frequency (RF) signals. The plurality of RF signals may be combined and the combined plurality of RF signals may be amplitude modulated.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8037518
    Abstract: Methods and associated systems for processing data are disclosed. A hashing function sequentially processes a hash key to generate a hash value. A policy management system processes packets according to defined policies.
    Type: Grant
    Filed: September 10, 2009
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventor: Mark L. Buer
  • Patent number: 8037328
    Abstract: A Power-over-Ethernet (PoE) communication system dynamically provides power and data communications over a communications link. In a computing environment made up of one or more personal computing devices (PCD) and/or one or more powered devices (PD), power source equipment (PSE) determines an allocated amount of power to be supplied to each device. The personal computing devices include a unified LAN-On-Motherboard (LOM) that combines the functionality of a powered device (PD) controller of a conventional PD and a LOM of a conventional personal computing device into a single unified subsystem. The unified LOM includes a standard or universal interface between the LOM and PD controller so that different types of PD devices with differing functionality can be easily married to the LOM, without requiring significant hardware or software redesign.
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventors: Wael William Diab, Simon Assouad
  • Patent number: 8036316
    Abstract: Certain aspects of a method and system for independent in-phase (I) and quadrature (Q) loop amplitude control for quadrature generators may include determining an amplitude voltage associated with an in-phase (I) component and a quadrature (Q) component of a generated signal. A DC reference voltage associated with the I component and the Q component may be determined. The determined amplitude voltage may be compared with the determined reference voltage to generate a control signal. The amplitude mismatch between the I component and the Q component may be compensated by controlling a biasing current of one or more programmable buffers associated with one or both of the I component and the Q component, based on the generated control signal.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventors: Arya Behzad, Qiang Li, Razieh Roufoogaran
  • Patent number: 8037323
    Abstract: A system and method for using an Ethernet physical layer device to identify cabling topologies. A power sourcing equipment (PSE) can power independent powered devices (PDs) using two sets of wire pairs in a single four-pair cable. Higher power PSEs can power a single PD using all four wire pairs in the cable. Conventional power over Ethernet (PoE) analog techniques (i.e., voltage, current, etc.) have a difficult time distinguishing where the wire pairs are going from the PSE. By using information (e.g., negotiated speed, link energy, distance diagnostic, etc.) generated by the physical layer device (PHY) subsystem, the PoE system can determine whether the two sets of wire pairs in a cable are powering a single PD or two independent PDs.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventors: Wael William Diab, Scott Powell
  • Patent number: 8037351
    Abstract: A process for restoring an operational state of a portable handheld device is provided. The device may include multiple computing units and persistent storage. The operational state may be generated by a sequence of events. The operational state may receive signals corresponding to a plurality of event types. The process may include selecting an event type for storage, storing in the persistent storage events corresponding to the selected event type, receiving a signal indicating an interruption of operation, and transmitting the stored events to restore the device to the operational state.
    Type: Grant
    Filed: April 15, 2008
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventors: Li Li, Jin Guo
  • Patent number: 8036626
    Abstract: Aspects of a method and system for a distributed transceiver with DDFS channel selection may include frequency-translating a first signal to generate one or more second signals utilizing a distributed mixer and an in-phase and quadrature mixing stage. The first signal may be an input signal to the distributed mixer, which may comprise a plurality of frequency conversion stages. The input signal to the distributed mixer may be an input signal to at least one of the plurality of frequency conversion stages and an output signal of the distributed mixer may be generated from one or more output signals or the plurality of conversion stages. The output signal from the distributed mixer may be an input signal to the in-phase and quadrature mixing stage and the one or more second signals may be generated from one or more output signals of the in-phase and quadrature mixing stage.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8036639
    Abstract: In a communication network, a method and system for confirming secure communication network setup in a wireless local area network (WLAN) are provided. After a secure communication configuration is completed in a wireless network between a configurator station and a client station, a test exchange operation may be utilized during a configurator registration window to verify or validate the successful exchange of the SSID and passphrase to the client station. In this regard, the test exchange verifies the ability of the client station to connect to the corresponding WLAN. The test exchange may comprise an IEEE 802.11 or WLAN exchange phase, a Wi-Fi protected access (WPA) exchange phase, and a secure configuration protocol echo exchange phase. The WLAN and WPA exchanges may be utilized to enable a WPA joining of the client station while the secure configuration protocol echo exchange may be utilized to provide further authentication support.
    Type: Grant
    Filed: August 18, 2005
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventors: Edward Carter, Manoj Thawani, Manas Deb
  • Patent number: 8035419
    Abstract: A system comprises signal paths. There are first through n signal paths, n being a positive integer. A critical one of the first through n signal paths is based on being a respective one of the first through n signal paths having a slowest signal propagation and/or a path in which a signal propagates slower than a clock cycle. The critical one of the first through n signal paths comprises a first size of a standard cell including corresponding logic devices. The non-critical ones of the first through n signal paths comprise a second size of a standard cell including corresponding logic devices, the second size being smaller than the first size.
    Type: Grant
    Filed: December 31, 2009
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventor: Paul Penzes
  • Patent number: 8036599
    Abstract: Aspects of a method and system for a Bluetooth headset with a clock are provided. A Bluetooth headset may have an access to real-time clock information such as a real-time clock value at a specific time instant and generate corresponding audio and/or visual representations to a user via Bluetooth communication. The real-time clock information to the Bluetooth headset may be originated within or external to the Bluetooth headset. The timing of the real-time clock of the Bluetooth headset may be maintained by a Bluetooth clock of the BT headset. The Bluetooth headset may provide respective real-time updates by pressing a button on the Bluetooth headset or from timing events such as calendar entries or personal alarms downloaded into the BT headset from a Bluetooth device, and/or from timed Bluetooth messages communicated to the Bluetooth headset from the peer device.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventor: John Walley
  • Patent number: 8037238
    Abstract: According to embodiments of the invention a multi-mode memory device is provided. The memory device includes at least one content-addressable memory (CAM). The memory device further includes a first match-in bus for receiving input into a first CAM of the at least one CAM, wherein the status of the match-in bus determines a operating mode of a plurality of operating modes of the first CAM, and a match-out bus for enabling the first CAM to be coupled to another CAM module and comprises match lines of a memory portion of the first CAM, wherein if the match-in bus is disabled, first CAM is in a first mode, and if the match-in bus is enabled, the first CAM is in a second mode.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventor: Michael H. Lau
  • Patent number: 8036323
    Abstract: Aspects of a method and system for decoding single antenna interference cancellation (SAIC) and redundancy processing adaptation using frame process are provided. A receiver may decode video, voice, and/or speech bit sequences based on a first decoding algorithm that may utilize data redundancy and that may impose physical constraints. The receiver may also decode a bit sequence based on a second decoding algorithm that utilizes SAIC. The first and second decoding algorithms may be adapted to perform in parallel and a decoded received bit sequence may be selected based on a redundancy verification parameter. The first and second decoding algorithms may also be adapted to be performed sequentially where the subsequent decoding operation may be conditioned to the initial decoding operation. Moreover, either the first or the second decoding algorithm may be selected for decoding the received bit sequence. The selection may be based on noise and/or interference measurements.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventors: Huaiyu (Hanks) Zeng, Jie Lai, Yueheng Sun, Nelson Sollenberger, Arie Heiman, Yossy Pruzanski
  • Patent number: 8035399
    Abstract: A system and method for using a physical layer device to locate a thermal signature in a cable plant for diagnostic, enhanced, and higher power applications. Cable heating in specific sections of a network cable is detected through an automatic identification of a thermal signature in electrical measurements of a network cable. The correlation of the thermal signature to a specific section of the network cable enables network personnel to locate hot spots in the network cable with ease.
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventors: Wael William Diab, Scott Powell, Minshine Shih
  • Patent number: 8035748
    Abstract: Herein described is a method and system for generating an improved video output when deinterlacing pull-down video. The improvement results from reducing cross-chroma artifacts. In a representative embodiment, the method comprises first computing an adjusted chroma of a present pixel from a present top field or present bottom field of film sourced video as a function of an execution stage field phase. The method further comprises second computing a chroma of an absent pixel vertically adjacent to the present pixel, wherein the second computing is performed as a function of the execution stage field phase. In a representative embodiment, a deinterlacer video engine and a local storage circuitry process the 3:2 pull-down video by applying various equations for performing the first computing and the second computing. An adjusted chroma and an absent pixel chroma is computed for each present pixel at each execution stage field phase.
    Type: Grant
    Filed: July 12, 2006
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventors: Richard Hayden Wyman, Brad A. Delanghe
  • Patent number: 8035751
    Abstract: A system and method for detecting the presence and location of pull-down fields in a video field stream. Various aspects of the present invention may comprise method steps and circuit structure for generating an array of variance indications, each of which represents a degree of variance between two video fields in the video field stream. Various aspects may comprise comparing the array of variance indications to a pattern to detect a pull-down field in the video field stream. Various aspects may comprise comparing corresponding portions of video fields and generating a histogram of differences between the corresponding portions. Various aspects may comprise generating an indication of variance of the histogram and analyzing the indication of variance. Various aspects may comprise analyzing an array of such indications of variance and may comprise comparing the array of such indications to a pattern or plurality of patterns.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventors: Darren Neuman, Joseph Del Rio, Vadim Kochubievski, Craig Zinkievich, Shannon Posniewski, Alexander G. MacInnis
  • Patent number: 8036296
    Abstract: Certain aspects of a method and system for achieving space and time diversity gain are disclosed. Aspects of one method may include modifying a generalization code of at least one pilot channel, to measure signal strengths for each of a plurality of received multipath signals. A portion of the plurality of received multipath signals may be combined based on the measured signal strengths. The signal strengths of the plurality of received multipath signals may be measured on a primary pilot channel by assigning its generalization code to zero. The signal strengths of the plurality of received multipath signals on a secondary pilot channel may measured by assigning its generalization code to a non-zero value.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventors: Louis Botha, Philip Koekemoer, Sang Hun Sung, Ning Kong
  • Patent number: 8036484
    Abstract: Methods, systems, and apparatuses for averaging data in packed format are provided. The data may be image data, such as data words containing color-specific data portions representative of pixels of a captured image. A first data word containing first image data is received. A second data word containing second image data is received. A logical AND of the first data word and the second data word is performed to generate a third data word. A logical exclusive OR (XOR) of the first data word and the second data word is performed to generate a fourth data word. A right shift of the fourth data word is performed. The third data word and the right shifted fourth data word are summed to generate a fifth data word that is an average of the first and second data words.
    Type: Grant
    Filed: October 16, 2007
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventors: Wenqing Jiang, Ying Cao, Li Hao, Weiping Pan
  • Patent number: 8037324
    Abstract: In a Power over Ethernet (POE) system, a power source equipment (PSE) device configured to deliver power to one or more powered devices (PDs) over a plurality of Ethernet transmission lines. The PSE interface includes a multi-port transmission line connector capable connecting to multiple Ethernet transmission lines, and a power source equipment (PSE) controller module integrated with the multi-port transmission line connector. The PSE controller module is capable of high power operation beyond that specifically by IEEE standard 802.3af™ for powered devices. More specifically, the PSE controller is configured to deliver over 15.4 Watts, and up to 36 Watts of power, to meet the needs of high powered devices such as IP Phones, and access points. Further, the PSE controllers can utilize, currently unused, class 4 of IEEE standard 802.3af™ to identify, initiate, and classify the high power operation.
    Type: Grant
    Filed: March 20, 2008
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventor: Asif Hussain
  • Patent number: 8036686
    Abstract: A circuit includes an on-chip gyrating circuit that generates a motion parameter based on motion of the circuit. A global positioning system (GPS) receiver receives a GPS signal and that generates GPS position data based on the GPS signal. A processing module processes the motion parameter to produce motion data, generates position information based on at least one of the GPS position data and the motion data, converts outbound data into an outbound symbol stream, and converts an inbound symbol stream into inbound data. A wireless local area network (WLAN) transceiver section generates an outbound RF signal from the outbound symbol stream, and converts an inbound RF signal into the inbound symbol stream.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 8036711
    Abstract: Systems and methods that provide antenna selection in multi-antenna-element communication systems are provided. In one embodiment, a system that selects N antenna elements in an M-antenna-element transmitter or an M-antenna-element receiver, in which N is less than M, may include, for example, M antenna elements in the M-antenna-element transmitter or the M-antenna-element receiver; N RF chains; and a switch coupled to the N RF chains. The M-antenna-element receiver may determine a bit error rate for each possible N antenna element subset of the M antenna elements. The M-antenna-element receiver may determine the particular N antenna element subset with a lowest bit error rate. In response to the determination of the particular N antenna element subset with the lowest bit error rate, the switch may couple the N RF chains to the particular N antenna element subset with the lowest bit error rate.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: October 11, 2011
    Assignee: Broadcom Corporation
    Inventors: Severine Catreux-Erceg, Vinko Erceg, Pieter Roux, Pieter Van Rooyen, Jack Winters