Patents Assigned to Broadcom Corporation
  • Publication number: 20130095836
    Abstract: A femtocell for conserving power, which includes a transmitter module configured to be inactive for periods of call inactivity and data inactivity within a corresponding femtocell geographic coverage area, and includes a monitoring device configured to monitor the femtocell geographic coverage area, and further includes a controller module configured to cause a call handover to the femtocell when a cellular handset device is functioning and is located within the femtocell geographic coverage area. The femtocell also being configured to communicate with one or more macrocell base stations, each having a corresponding macrocell, which are configured to facilitate communication between the cellular handset device and a wireless network.
    Type: Application
    Filed: June 14, 2012
    Publication date: April 18, 2013
    Applicant: Broadcom Corporation
    Inventors: Rafael Carmon, Nicholas Ilyadis
  • Publication number: 20130094438
    Abstract: A wireless communication system, which includes at least one base station module configured to implement a media access controller and a physical layer, and includes at least one remote radio head module configured to prepare an analog signal or a digital data signal for transmission and receipt over a link in accordance with dedicated interface specifications, and also includes at least one outdoor signal conversion module configured to perform a high rate digital-to-analog conversion and a high rate analog-to-digital conversion in accordance with the dedicated interface specifications, and further includes at least two millimeter wave antenna assemblies, where each antenna assembly is configured to transmit and receive the analog signal over a wireless link in accordance with the dedicated interface specifications.
    Type: Application
    Filed: January 5, 2012
    Publication date: April 18, 2013
    Applicant: Broadcom Corporation
    Inventors: Eran RIDEL, Ran Soffer
  • Publication number: 20130094549
    Abstract: A millimeter wave modem assembly, which includes an input/output interface module configured to receive and transmit standardized data streams in accordance with dedicated interface specifications, and includes an encoder module configured to encode the standardized data streams to form coded digital bits, and also includes a physical layer module configured to convert the coded digital bits into digital symbols and into digital samples, and to convert the digital samples into the digital symbols and then into the coded digital bits; and further includes a data conversion module configured to perform a high rate conversion of the digital samples to form an analog signal suitable for wireless transmission over a link in accordance with the dedicated interface specifications.
    Type: Application
    Filed: December 30, 2011
    Publication date: April 18, 2013
    Applicant: Broadcom Corporation
    Inventors: Eran Ridel, Ran Soffer
  • Publication number: 20130094621
    Abstract: Aspects of a method and system for channel estimation for interference suppression are provided. In this regard, one or more circuits and/or processors of a mobile communication device may generate and/or receive a first set of channel estimates and a second set of channel estimates. The one or more circuits and/or processors may modify the second set of channel estimates based on a comparison of a measure of correlation between the first set of channel estimates and the second set of channel estimates with a threshold. The first set of channel estimates and/or the modified second set of channel estimates may be utilized for cancelling interference in received signals. The first set of channel estimates may be associated with a first transmit antenna of a base transceiver station and the second set of channel estimates may be associated with a second transmit antenna of the base transceiver station.
    Type: Application
    Filed: December 4, 2012
    Publication date: April 18, 2013
    Applicant: Broadcom Corporation
    Inventor: Broadcom Corporation
  • Publication number: 20130094365
    Abstract: An adaptive traffic manager assembly, which includes a computing module configured to operate on a current adaptive traffic manager configuration, and includes an adapting mechanism configured to adaptively change the current adaptive traffic manager configuration according to current wireless link conditions, a current Adaptive Coding and Modification (ACM) profile, or upon detection of an ACM event, and further includes a switch assembly configured to receive a first signal over a wired link and to output a second signal over a wireless link, and configured to store the current adaptive traffic manager configuration, and is further configured to automatically change a modulation and coding scheme associated with the current adaptive traffic manager configuration upon receiving an instruction from the computing module, in response to the detection of the ACM event.
    Type: Application
    Filed: January 9, 2012
    Publication date: April 18, 2013
    Applicant: Broadcom Corporation
    Inventor: Ran SOFFER
  • Publication number: 20130094378
    Abstract: Method and apparatus for computing a noise power estimate in a wideband CDMA (WCDMA) network are disclosed and may include calculating a noise power estimate for a downlink channel based on an orthogonal sequence generated for a transmitted signal. The orthogonal sequence may be generated based on a slot number of the transmitted signal and/or a transmit diversity mode used for the transmitted signal. A portion of a plurality of dedicated physical channel (DPCH) pilot bits for the downlink channel may be summed to generate an in-phase (I) component and a quadrature (Q) component. The generated I component and the generated Q component may be multiplied by the orthogonal sequence to generate at least one noise I component and at least one noise Q component.
    Type: Application
    Filed: September 14, 2012
    Publication date: April 18, 2013
    Applicant: Broadcom Corporation
    Inventors: Uri M. Landau, Severine Catreux-Erceg, Mark Kent, Vinko Erceg
  • Publication number: 20130094650
    Abstract: Encrypted information is conventionally broken into blocks which are transmitted sequentially. Because the order and the size of such blocks can be easily determined, an eavesdropper can gain valuable information regarding the content of the communication. More specifically, if known types of information exist within a block, the encryption key may be determined allowing the content of other encrypted blocks to be obtained. Embodiments of a system, method and computer program product described herein can overcome this deficiency by securely transferring information through random ordering and random block sizing. An original data set to be transferred is divided into a plurality of blocks, where at least two blocks have different sizes. The blocks are encrypted and inserted into a sequence of data transfer slots. The blocks are then selected for transfer in random order by selecting a slot to transfer based on a generated random number.
    Type: Application
    Filed: May 14, 2012
    Publication date: April 18, 2013
    Applicant: Broadcom Corporation
    Inventor: Jacob Mendel
  • Patent number: 8422979
    Abstract: Aspects of a method and system for a low-noise, highly-linear receiver front-end are provided. In this regard, a received signal may be processed via one or more transconductances, one or more transimpedance amplifiers (TIAs), and one or more mixers to generate a first baseband signal corresponding to a voltage at a node of the receiver, and a second baseband signal corresponding to a current at the node of the receiver. The first signal and the second signal may be processed to recover information from the received signal. The first signal may be generated via a first one or more signal paths of the receiver and the second signal may be generated via a second one or more signal paths of the receiver.
    Type: Grant
    Filed: March 17, 2011
    Date of Patent: April 16, 2013
    Assignee: Broadcom Corporation
    Inventors: David Murphy, Ahmad Mirzaei, Mohyee Mikhemar, Hooman Darabi
  • Patent number: 8422591
    Abstract: Various systems and methods related to equalization precoding in a communications channel are disclosed. In one implementation precoding is performed on signals transmitted over an optical channel. In one implementation precoding and decoding operations are performed in parallel to facilitate high speed processing in relatively low cost circuits. Initialization of the precoders may be realized by transmitting information related to the characteristics of the channel between transceiver pairs.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: April 16, 2013
    Assignee: Broadcom Corporation
    Inventors: Oscar E. Agazzi, Gottfried Ungerboeck, Keshab K. Parhi, Christian A. Lutkemeyer, Pieter Vorenkamp, Kevin T. Chan, Myles H. Wakayama
  • Patent number: 8423695
    Abstract: A dual bus interface PCB includes a main chipset component, a first type bus interface connector, and a second type bus interface connector. The PCB can be configured at fabrication time to enable a variety of configurations for operation. Optionally, the PCB can also be provided at least one memory chip and a NIC (Network Interface Card) chip. By virtue of having a dual interface, the PCB can be used with either the first type or the second type bus. Furthermore, the dual interface PCB eliminates the need by chipset manufacturers to carry multiple PCB variations of the same product in order to support various bus interfaces. In one embodiment, the PCB is a dual PCI-X/PCI-E interface PCB.
    Type: Grant
    Filed: January 19, 2005
    Date of Patent: April 16, 2013
    Assignee: Broadcom Corporation
    Inventor: Charles J. Purwin
  • Patent number: 8422605
    Abstract: Provided is a method and system for estimating distortion in a communications channel including an adaptive equalizer. The method includes determining one or more adaptive filter coefficients associated with a signal passed through the equalizer. The method also includes estimating un-equalized channel distortion based upon the determined adaptive filter coefficients.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: April 16, 2013
    Assignee: Broadcom Corporation
    Inventors: Thomas J. Kolze, Bruce J. Currivan
  • Patent number: 8422606
    Abstract: Certain aspects of the method may comprise receiving a plurality of spatially multiplexed communication signals from a plurality of transmit antennas at a base station. A plurality of vectors of baseband combined channel estimates may be generated based on phase rotation of the received plurality of spatially multiplexed communication signals. A plurality of pre-equalization weights may be generated based on the generated plurality of vectors of baseband combined channel estimates. The received plurality of spatially multiplexed communication signals may be modified based on the generated plurality of pre-equalization weights. At least a portion of the generated plurality of pre-equalization weights may be fed back to the base station for modifying subsequently transmitted spatially multiplexed communication signals which are transmitted from at least a portion of the plurality of transmit antennas at the base station.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: April 16, 2013
    Assignee: Broadcom Corporation
    Inventors: Mark Kent, Vinko Erceg, Uri M Landau, Pieter van Rooyen, Pieter Roux
  • Patent number: 8423077
    Abstract: A multi-mode wireless communication device and multi-mode communication method are disclosed. The multi-mode device includes a first baseband co-processor configured to execute low-level stack operations of a first wireless communications protocol employed within a first wireless communications network. The device also includes a host baseband processor configured to execute a set of protocol stack operations of a second wireless communications protocol employed within a first wireless communications network and higher-level stack operations of the first wireless communications protocol. A data communication channel capable of carrying data received by the multi-mode wireless communication device from the first wireless communications network or sent by the multi-mode wireless communication device through the first wireless communications network is provided between at least the host baseband processor and the first baseband co-processor.
    Type: Grant
    Filed: December 11, 2003
    Date of Patent: April 16, 2013
    Assignee: Broadcom Corporation
    Inventors: Frederic Hayem, Leo Borromeo, Michiel Lötter
  • Patent number: 8421556
    Abstract: A switched capacitor includes a capacitor and a switch. The capacitor is coupled between a p-node and an n-node and includes interleaved p-fingers and n-fingers. A number of the p-fingers is greater than a number of the n-fingers. The switch is coupled between the n-node and ground.
    Type: Grant
    Filed: October 16, 2009
    Date of Patent: April 16, 2013
    Assignee: Broadcom Corporation
    Inventors: Calvin (Shr-Lung) Chen, Ethan Chang
  • Patent number: 8422512
    Abstract: Aspects of a method and system for an extended range Ethernet line code are provided. One or more ternary encoded bitstreams may be generated and transmitted. The generating may comprise mapping 3-bit binary IDLE patterns having a least significant bit of zero to a non-zero ternary value, and mapping 3-bit binary IDLE patterns having a non-zero least significant bit to a ternary zero. The generating may comprise receiving binary data via a media independent interface, mapping each 4-bit portion of said received binary data to a ternary symbol comprising two ternary bits, and transmitting said ternary symbol over said one or more physical channels. Data portions of the one or more ternary encoded bitstreams may be generated by mapping 3-bit binary patterns to 2-bit ternary symbols. One of the nine possible 2-bit ternary symbols may be reserved for control portions of said one or more ternary encoded bitstreams.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: April 16, 2013
    Assignee: Broadcom Corporation
    Inventors: Xinhua Yu, Kuang-Chou Chang, Yencheng Chen, Scott Powell
  • Patent number: 8422967
    Abstract: Methods and systems for amplitude modulation using a leaky wave antenna are disclosed and may include amplitude modulating an output of one or more power amplifiers in a wireless device by modulating a bias current in the power amplifiers that are coupled to one or more leaky wave antennas. The leaky wave antennas may include a balun that may be integrated on the chip, on a package to which the chip may be affixed, and/or integrated on a printed circuit board to which the chip may be affixed. An output power of the power amplifiers may be adjusted by configuring a bias voltage on the leaky wave antennas. The bias voltage may be configured utilizing a DC to DC voltage controller. The bias current may be modulated via one or more switched current sources. The switched current sources may be binary weighted and/or may be current mirrors.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: April 16, 2013
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8423039
    Abstract: A system and method that provide dynamic reconfiguration of communication resources in a multi-transceiver configuration. Various aspects of the present invention may comprise communicating a first portion of a first communication using a plurality of transceivers. A determination may be made to reallocate at least one of the plurality of transceivers for a second communication. A second portion of the first communication may be communicated using the plurality of transceivers less the reallocated transceiver(s), and the second communication may be communicated using at least the reallocated transceiver(s). Various aspects of the present invention may also comprise communicating a first communication utilizing a first transceiver and a second communication utilizing a second transceiver. A determination may be made to utilize the first and second transceivers in a MIMO configuration to communicate next information.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: April 16, 2013
    Assignee: Broadcom Corporation
    Inventors: Jeyhan Karaoguz, Nambirajan Seshadri, James D. Bennett
  • Patent number: 8422265
    Abstract: According to one exemplary embodiment, a one-time programmable memory cell includes an access transistor coupled to a shiftable threshold voltage transistor between a bitline and a ground, where the access transistor has a gate coupled to a wordline. The shiftable threshold voltage transistor has a drain and a gate shorted together. A programming operation causes a permanent shift in a threshold voltage of the shiftable threshold voltage transistor to occur in response to a programming voltage on the bitline and the wordline. In one embodiment, the access transistor is an NFET while the shiftable threshold voltage transistor is a PFET. In another embodiment, the access transistor is an NFET and the shiftable threshold voltage transistor is also an NFET. The programming voltage can cause an absolute value of the threshold voltage to permanently increase by at least 50.0 millivolts.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: April 16, 2013
    Assignee: Broadcom Corporation
    Inventors: Frank Hui, Xiangdong Chen, Wei Xia
  • Publication number: 20130088299
    Abstract: Aspects of a system for a power amplifier with an on-package matching transformer may include a DC/DC converter that enables generation of a bias voltage level within an IC die based on an amplitude of an input signal to a PA circuit within the IC die. The bias voltage level may be applied to a transformer, which is external to the IC die but internal to an IC package containing the IC die and/or a circuit board containing the IC package. One or more amplifier bias voltage levels, derived from the bias voltage level applied to the transformer, may be applied to the PA circuit.
    Type: Application
    Filed: November 29, 2012
    Publication date: April 11, 2013
    Applicant: Broadcom Corporation
    Inventor: Broadcom Corporation
  • Publication number: 20130090067
    Abstract: Methods and systems for a configurable tuned MOS capacitor are disclosed and may include filtering undesired signals in a chip utilizing one or more configurable MOS capacitors comprising one or more MOS transistors. The source and drain terminals of the MOS transistors may be coupled together. The filtering frequencies may be tuned by configuring a resonance frequency of a matching circuit coupled to the source and drain terminals. The matching circuit may include a variable capacitor, which may include an array of binary-weighted addressable capacitors. The addressable capacitors may include MOS transistors. The matching circuit may include a variable inductor such as a multi-tap transmission line, and may be integrated on the chip and/or on a package to which the chip is bonded. A capacitance value of the configurable MOS capacitor may be configured utilizing a bias voltage on the matching circuit.
    Type: Application
    Filed: November 30, 2012
    Publication date: April 11, 2013
    Applicant: Broadcom Corporation
    Inventor: Broadcom Corporation