Patents Assigned to Broadcom Corporation
  • Publication number: 20130070784
    Abstract: A method for increasing upstream bandwidth per cable modem user in a cable communications system that includes a cable modem termination system (CMTS) and a plurality of cable modems is provided. The method permits a cable modem to transmit data to the CMTS on multiple upstream channels simultaneously using a technique called “channel bonding.” Channel bonding allows smaller bandwidth upstream channels to be bonded together to create a larger bandwidth pipe.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 21, 2013
    Applicant: Broadcom Corporation
    Inventors: Lisa Voigt Denney, Niki Roberta Pantelias, A. Scott Hollums, Victor T. Hou, John Daniel Horton, JR., David Michael Pullen
  • Publication number: 20130069932
    Abstract: A system and method for generating a three-dimensional image using depth layers is provided. A plurality of depth layers may be generated from the image, where each depth layer has a height, a width, and a thickness. Certain regions of the image may be assigned to one of the plurality of depth layers. A depth map may be generated based on the depth layers. Further, a disparity map may be generated based on both the depth map and the depth layers. A stereo view of the image may then be rendered based on the disparity map.
    Type: Application
    Filed: September 15, 2011
    Publication date: March 21, 2013
    Applicant: Broadcom Corporation
    Inventor: Hyeong-Seok Victor HA
  • Publication number: 20130072256
    Abstract: Systems and methods according to embodiments of the present invention are provided for increasing the power efficiency of a communications device by allowing it to support dual-SIM functionality while issuing simultaneous wake ups for each SIM. Embodiments of the present invention leverage time sharing solutions to minimize the amount of circuitry needed in a communications device to issue wake ups while avoiding the drawbacks of other time sharing solutions that result in increased overhead due to requiring multiple transitions from an idle state to an active state.
    Type: Application
    Filed: September 19, 2011
    Publication date: March 21, 2013
    Applicant: Broadcom Corporation
    Inventor: Jin-Sheng SU
  • Publication number: 20130072138
    Abstract: Methods and systems for an n-phase transmitter utilizing a leaky wave antenna (LWA) are disclosed and may include transmitting an n-phase wireless signal at a first frequency via the LWA utilizing a plurality of second frequency signals from one or more signal sources, and the second frequency may be lower than the first frequency. Each of the second frequency signals may be configured with a phase difference and may be communicated to the LWA utilizing one or more power amplifiers (PAs). The PAs may be operated in switching mode, thereby generating a square wave. The LWAs may be integrated on the chip, on a package to which the chip is affixed, and/or on a printed circuit board to which the chip is affixed. Square wave signals may be generated utilizing the signal sources. The transmitted wireless signal may be amplitude modulated utilizing a bias voltage applied to the LWAs.
    Type: Application
    Filed: October 19, 2012
    Publication date: March 21, 2013
    Applicant: Broadcom Corporation
    Inventor: Broadcom Corporation
  • Publication number: 20130072191
    Abstract: A method and apparatus of determining a hand-off metric are disclosed. One method includes a subscriber receiving identifications of a neighboring set of base stations from a serving base station, determining an active set of base stations by measuring received signal power from each of the base stations of the neighboring set at first discrete points in time, averaging the received signal power for each of these base stations, and selecting the active set based on the average received signal power. Determining the hand-off metric further includes calculating a ratio of average receive signal power to average excess received signal power, for each base station of the active set, wherein the excess received signal power includes signal power received by the subscriber in excess of power received from the base station.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 21, 2013
    Applicant: Broadcom Corporation
    Inventors: Louay JALLOUL, Djordje Tujkovic, Anupama Lakshmanan
  • Publication number: 20130069810
    Abstract: A received plurality of signals may be filtered to select an in-band signal and/or an out-of-band. A signal strength of the selected signal(s) may be measured. A resolution of an analog-to-digital converter may be controlled based on the measured signal strength(s). The selected in-band signal may be converted to a digital representation via the analog-to-digital converter. The resolution may be decreased when the strength of the in-band signal is higher, and increased when the strength of the in-band signal is lower. The resolution may be increased when the strength of the out-of-band signal is higher, and decreased when the strength of the out-of-band signal is lower. A signal-to-noise ratio and/or dynamic range of the selected signal(s) may be determined based on the measured signal strength(s), and may be utilized to adjust the resolution of the analog-to-digital converter.
    Type: Application
    Filed: October 25, 2012
    Publication date: March 21, 2013
    Applicant: Broadcom Corporation
    Inventor: Broadcom Corporation
  • Publication number: 20130072141
    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: Application
    Filed: October 5, 2012
    Publication date: March 21, 2013
    Applicant: Broadcom Corporation
    Inventor: Broadcom Corporation
  • Publication number: 20130072125
    Abstract: A transceiver circuit includes a transmitter to send communication signals and a receiver to receive communication signals sent by other transmitters. The transceiver circuit also includes a switch to connect the transmitter and the receiver to at least one antenna. The switch controls at least two directions of polarization of the at least one antenna.
    Type: Application
    Filed: September 19, 2011
    Publication date: March 21, 2013
    Applicant: Broadcom Corporation
    Inventors: Seunghwan Yoon, Bagher Afshar, Jesus Alfonso Castaneda, Brima Ibrahim, Michael Boers
  • Publication number: 20130072136
    Abstract: A compact antenna includes a main antenna patch. A first feed point and a second feed point connect with the main antenna patch to provide current in the main antenna. Excitation of the first feed point produces polarization in a first direction along the main antenna patch and excitation of the second feed point produces polarization in a second direction different from the first direction.
    Type: Application
    Filed: September 21, 2011
    Publication date: March 21, 2013
    Applicant: Broadcom Corporation
    Inventors: Alfred Grau Besoli, Nick Alexopoulos, Jesus Alfonso Castaneda
  • Publication number: 20130071009
    Abstract: A system is provided for generating a three dimensional image. The system may include a processor configured to generate a disparity map from a stereo image, adjust the disparity map to compress or expand a number of depth levels within the disparity map to generate an adjusted disparity map, and render a stereo view of the image based on the adjusted disparity map.
    Type: Application
    Filed: September 15, 2011
    Publication date: March 21, 2013
    Applicant: Broadcom Corporation
    Inventor: Hyeong-Seok Victor Ha
  • Publication number: 20130070878
    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 frequency translates a communication signal to the baseband frequency or the IF using a first local oscillator signal to provide a downconverted communication signal. A filter corresponding to the baseband frequency or the IF filters the downconverted communication signal to provide a filtered communication signal. An upconversion mixer frequency translates a communication signal using a second local oscillator signal. The frequency translation by the upconversion mixer, in effect, translates the filter characterization from the low Q filter to the high Q filter at frequencies greater than the baseband frequency or the IF.
    Type: Application
    Filed: September 13, 2012
    Publication date: March 21, 2013
    Applicant: Broadcom Corporation
    Inventors: Ahmad Mirzaei, Mohyee Mikhemar, Hooman Darabi
  • Patent number: 8401502
    Abstract: Provided is a method and system for controlling current characteristics in a transceiver having a transmitter. The transmitter includes a plurality of current cells. Each cell is configurable for operating in different modes. The method includes determining a first probability associated with transmitting data at a particular symbolic level and determining a second probability associated with each cell being used during a transmission at the particular symbolic level. Next, one of the modes for each cell is selected in accordance with anticipated performance requirements. An average current of the transmitter is then calculated based upon the determined first and second probabilities and the selected modes.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: March 19, 2013
    Assignee: Broadcom Corporation
    Inventors: Yee Ling Cheung, Kevin T. Chan, Jan Mulder
  • Patent number: 8401588
    Abstract: A dual mode human interface device (HID) includes a wireless interface for wireless communication with a host computer; a wired interface for wired communication with the host computer; and a processor coupled with the wireless interface and the wired interface for transferring data between the HID and the host computer, wherein the processor initiates establishing wireless communication with the host computer, when the HID is connected to the host computer via the wired interface.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: March 19, 2013
    Assignee: Broadcom Corporation
    Inventors: Muhammad Farooq Hameed, Brian Jason Tietz, Robert William Hulvey
  • Patent number: 8401598
    Abstract: A wireless device comprising a plurality of chips may be operable to wirelessly communicate information between a plurality of chips via selectable directional antennas. Each of the chips may comprise one or more transmitters and receivers, and one or more integrated directional antennas communicatively coupled to the transmitters and/or receivers. The directional antennas may include patch antennas that may be configured to transmit signals in the direction of another chip intended to receive the transmitted signals. The patch antennas may be configured to transmit signals at a frequency matching a configured frequency of a directional antenna integrated on another of the plurality of chips intended to receive the transmitted signals. The directional antennas may include dipole antennas. The inter-chip communication may include baseband signals, radio frequency signals, and/or intermediate frequency signals. The plurality of chips may be integrated on a single package or on a plurality of packages.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: March 19, 2013
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8401132
    Abstract: A communications receiver includes a noise analyzer to characterize the composition of the interference and/or distortion impressed onto a transmitted communications signal in the presence of one or more time-varying conditions. The noise analyzer may provide a selection signal indicating the composition of the interference and/or distortion impressed onto a transmitted communications signal in the presence of one or more time-varying conditions to be used by the communications receiver. In an exemplary embodiment, the communications receiver selects at least one set of filter coefficients to compensate for the interference and/or distortion impressed onto a transmitted communications signal in the presence of a particular time-varying interference and/or distortion condition.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: March 19, 2013
    Assignee: Broadcom Corporation
    Inventors: Thomas Joseph Kolze, Bruce J. Currivan
  • Patent number: 8400419
    Abstract: A touch screen can be used in a communication device having a transceiver that communicates radio frequency (RF) signals. The communication device includes an antenna and a programmable antenna interface that couples the antenna to the transceiver. The touch screen includes a display layer for displaying information. An inductor grid includes a plurality of inductive elements. A switch matrix selects an inductive element in response to a selection signal in a first mode of operation, and couples together a group of inductive elements in a second mode of operation. A dual mode driver generates the selection signal and, in the first mode of operation, drives the selected inductive element to detect a touch object in proximity to the selected inductive elements and that generates touch screen data in response thereto. In a second mode of operation, the dual mode driver couples the group of inductive elements to the programmable antenna interface.
    Type: Grant
    Filed: April 20, 2009
    Date of Patent: March 19, 2013
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 8400361
    Abstract: An integrated circuit (IC) antenna structure includes a micro-electromechanical (MEM) area, a feed point, and a transmission line. The micro-electromechanical (MEM) area includes a three-dimensional shape, wherein the three dimensional-shape provides an antenna structure. The feed point is coupled to provide an outbound radio frequency (RF) signal to the antenna structure for transmission and to receive an inbound RF signal from the antenna structure. The transmission line electrically coupled to the feed point.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: March 19, 2013
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8401591
    Abstract: Systems and methods that provide channel-adaptive antenna selection in multi-antenna-element communication systems are provided. In one embodiment, a method that selects a subset of receive antennas of a receiver to receive a transmitted RF signal may include, for example, one or more of the following: establishing possible subsets of the receive antennas; determining sets of channel parameter statistics corresponding to the possible subsets of the receive antennas; computing output bit error rates of the receiver, each output bit error rate being computed based on at least one set of channel parameter statistics; selecting a particular possible subset of the receive antennas based upon a criterion predicated on the computed output bit error rates; and connecting one or more RF chains of the receiver to the receive antennas of the selected particular possible subset.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: March 19, 2013
    Assignee: Broadcom Corporation
    Inventors: Severine Catreux-Erceg, Vinko Erceg, Pieter Roux, Pieter Van Rooyen, Jack Winters
  • Patent number: 8400354
    Abstract: A combined GPS and GLONASS receiver receives GPS signals and GLONASS signals. A calibration signal is generated utilizing the received GPS signals and/or the received GLONASS signals to offset group delay errors in the received GLONASS signals. The generated calibration signal is filtered through Kalman filters to estimate group delay variations in the received GLONASS signals. The estimated group error delay variations are combined with the received GLONASS signals to calibrate the received GLONASS signals by offsetting the estimated group error delay variations. When GPS signals are not available for use, the combined GPS and GLONASS receiver obtains group delay errors stored or in the received GLONASS signals to estimate calibration coefficients. The estimate calibration coefficients are updated utilizing received GPS and/or GLONASS signals.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: March 19, 2013
    Assignee: Broadcom Corporation
    Inventor: Charles Abraham
  • Patent number: 8401175
    Abstract: An internet protocol telephone includes a substrate having an input and an output that are capable of being connected to the internet protocol (IP) network. A relay is disposed on the substrate and is connected between the input and the output of the substrate. The relay includes first and second native FETs that have a threshold voltage of approximately zero volts. Therefore, the relay is nominally turned-on, even when little or no voltage (or power) is applied to the IP telephone substrate, as during the discovery mode of IP telephone operation. During discovery mode, The IP phone is configured to be responsive to extended link pulses and block data packets that are associated with legacy devices. Data packets have a higher signal duration and are more continuous than extended link pulses. The IP phone includes a switchable ground that is connected to the gates of the native devices, and is controlled by a rectifier and filter circuit that are connected to the substrate input.
    Type: Grant
    Filed: August 10, 2009
    Date of Patent: March 19, 2013
    Assignee: Broadcom Corporation
    Inventors: Siavash Fallahi, Kevin Brown