Patents Assigned to Broadcom
  • Patent number: 7623830
    Abstract: A voice, data and RF integrated circuit includes a processing module that generates at least one control signal that indicates a receive calibration mode. An RF transmitter generates a transmit signal that includes a first calibration signal when the at least one control signal indicates the receive calibration mode. An RF receiver receives a received signal that includes the first calibration signal and generates at least one receiver equalization parameter for equalizing the RF receiver in response to receiver feedback signals, when the at least one control signal indicates the receive calibration mode.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: November 24, 2009
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20090285343
    Abstract: A filter settings generation operation includes sampling a communication channel to produce a sampled signal. The sampled signal is spectrally characterized across a frequency band of interest to produce a spectral characterization of the sampled signal. This spectral characterization may not include a signal of interest. The spectral characterization is then modified to produce a modified spectral characterization. Filter settings are then generated based upon the modified spectral characterization. Finally, the communication channel is filtered using the filter settings when the signal of interest is present on the communication channel. In modifying the spectral characterization, pluralities of spectral characteristics of the spectral characterization are independently modified to produce the modified spectral characterization. Modifications to the spectral characterization may be performed in the frequency domain and/or the time domain.
    Type: Application
    Filed: July 27, 2009
    Publication date: November 19, 2009
    Applicant: BROADCOM CORPORATION
    Inventors: Thomas J. Kolze, Bruce J. Currivan, Jonathan S. Min, Eric Ojard, James Chi Thi, Daniel Howard
  • Publication number: 20090285172
    Abstract: A method and apparatus for assigning holding packets in a wireless communication system or network includes determining an invalid station address that corresponds to an invalid station and that does not correspond to the address of an affiliated station. The invalid station address is assigned to a holding packet. The holding packet is transmitted to allocate a transmit period to the invalid station. This generates a quiet time in the wireless communication system or network during the transmit period.
    Type: Application
    Filed: July 24, 2009
    Publication date: November 19, 2009
    Applicant: BROADCOM CORPORATION
    Inventors: Christopher J. Hansen, Joonsuk Kim, Matthew Fischer, Rajugopal Gubbi, Jason A. Trachewsky
  • Publication number: 20090285095
    Abstract: Various example embodiments are disclosed. According to an example embodiment, a method may include receiving a token count units instruction, periodically increasing or decreasing a token count based at least in part on a refresh rate, and in response to receiving a packet, decreasing or increasing the token count based at least in part on a size of the packet and the instruction.
    Type: Application
    Filed: May 13, 2008
    Publication date: November 19, 2009
    Applicant: BROADCOM CORPORATION
    Inventors: Eric Baden, Jeff Dull
  • Publication number: 20090285320
    Abstract: A method for parallel concatenated (Turbo) encoding and decoding. Turbo encoders receive a sequence of input data tuples and encode them. The input sequence may correspond to a sequence of an original data source, or to an already coded data sequence such as provided by a Reed-Solomon encoder. A turbo encoder generally comprises two or more encoders separated by one or more interleavers. The input data tuples may be interleaved using a modulo scheme in which the interleaving is according to some method (such as block or random interleaving) with the added stipulation that the input tuples may be interleaved only to interleaved positions having the same modulo-N (where N is an integer) as they have in the input data sequence. If all the input tuples are encoded by all encoders then output tuples can be chosen sequentially from the encoders and no tuples will be missed.
    Type: Application
    Filed: August 3, 2009
    Publication date: November 19, 2009
    Applicant: BROADCOM CORPORATION
    Inventors: Kelly B. Cameron, Hau Thien Tran, Ba-Zhong Shen, Christopher R. Jones
  • Publication number: 20090287940
    Abstract: Systems and methods that process and protect content are provided. In one example, a system may include, for example, a first device coupled to a second device. The first device may include, for example, an integrated circuit that may include a content processing system and a security system. The security system may include, for example, a digital rights manager. The first device and the second device may be part of a network. The network receives content and control information via the first device. The content processing system processes incoming content based upon at least the control information. The integrated circuit protects the content before placing the content on the network.
    Type: Application
    Filed: June 16, 2009
    Publication date: November 19, 2009
    Applicant: BROADCOM CORPORATION
    Inventor: Jeffrey Douglas Carr
  • Publication number: 20090285198
    Abstract: A method for supporting communication between a source internet protocol phone and a destination internet protocol phone is provided. The source internet protocol phone communicates via a Network Address Translator (“NAT”) gateway. The method includes receiving a packet from the source phone at the NAT. The packet is for communication with the destination phone. The method further includes querying whether the destination phone is located in the subnetwork serviced by the NAT gateway. If the destination phone is not located in the subnetwork serviced by the NAT gateway, then the method includes sending the packet upstream to the destination phone via the Internet. If the destination phone is located in the subnetwork serviced by the NAT gateway, then the method includes directing the packet to the destination phone.
    Type: Application
    Filed: May 13, 2008
    Publication date: November 19, 2009
    Applicant: Broadcom Corporation
    Inventors: Richard Schwartz, Ray Farhat
  • Publication number: 20090287977
    Abstract: A wireless device for implementing Incremental Redundancy (IR) operations includes an IR memory dedicated to storing data related to the IR operations. The IR memory includes a Type I IR memory adapted to store IR status information of a Radio Link Control (RLC) data block and a Type II IR memory adapted to store the RLC data block.
    Type: Application
    Filed: July 23, 2009
    Publication date: November 19, 2009
    Applicant: BROADCOM CORPORATION
    Inventors: Li Fung Chang, Yongqian Wang
  • Publication number: 20090284652
    Abstract: A video processing system receives a plurality of video inputs and specifically tailors them to meet the audio/video format requirements of a plurality of recipient video devices. The video processing system may be incorporated into a set top box, personal video recorder, video player, television, or video equipment. The video processing system in the set top box allows multiple users to receive video programs or television broadcasts meeting the audio/video format requirements of the recipient devices of the users. The video processing system allows user to define the audio/video formats of the recipient devices. Alternatively, the video processing system queries the recipient devices and obtains the audio/video format requirements of the video devices. The video processing system delivers multiple audio/video outputs, reformatted from a plurality of audio/video sources on the basis of user input, wirelessly in the operational region or by a wired means to a number of video devices.
    Type: Application
    Filed: July 31, 2009
    Publication date: November 19, 2009
    Applicant: BROADCOM CORPORATION
    Inventors: James D. Bennett, Jeyhan Karaoguz
  • Publication number: 20090287496
    Abstract: A loudness enhancement system and method is described that increases the loudness of an audio signal being played back by an audio device that places limits on the dynamic range of the audio signal. In an embodiment, the loudness enhancement system and method compresses the audio signal to an adaptively-determined compression limit that is greater than or equal to a maximum desired output level and then applies an adaptively-determined degree of soft clipping to the compressed audio signal. The compression limit and degree of soft clipping may be determined based on an overload measure that is calculated for successive portions of the audio signal. The loudness enhancement system and method advantageously operates in a manner that generates less distortion than the method of simply over-driving the audio signal such that hard-clipping occurs.
    Type: Application
    Filed: July 28, 2009
    Publication date: November 19, 2009
    Applicant: BROADCOM CORPORATION
    Inventors: Jes Thyssen, Wilfrid LeBlanc, Juin-Hwey Chen
  • Publication number: 20090286487
    Abstract: An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.
    Type: Application
    Filed: June 26, 2009
    Publication date: November 19, 2009
    Applicant: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran, Brima Ibrahim, Jacob Rael, Shahla Khorram, Shervin Moloudi, Stephen Wu, Hooman Darabi, William T. Colleran, Ed Chien, Meng-An Pan
  • Publication number: 20090283858
    Abstract: The present invention provides several scalable integrated circuit high density capacitors and their layout techniques. The capacitors are scaled, for example, by varying the number of metal layers and/or the area of the metal layers used to form the capacitors. The capacitors use different metallization patterns to form the metal layers, and different via patterns to couple adjacent metal layers. In embodiments, optional shields are included as the top-most and/or bottom-most layers of the capacitors, and/or as side shields, to reduce unwanted parasitic capacitance.
    Type: Application
    Filed: July 29, 2009
    Publication date: November 19, 2009
    Applicant: BROADCOM CORPORATION
    Inventors: Victor Chiu-Kit Fong, Eric Bruce Blecker, Tom W. Kwan, Ning Li, Sumant Ranganthan, Chao Tang, Pieter Vorenkamp
  • Publication number: 20090285185
    Abstract: A method and device for transmitting a frame of a wireless communication begins by generating a preamble of the frame that includes a short training sequence and at least one long training sequence. The at least one long training sequence includes non-zero energy on each of a plurality of subcarriers except a DC subcarrier. The at least one long training sequence corresponds to the number of antennas and applicable wireless communication standards. A matrix is defined to represent the at least one long training sequence. The preamble is compatible with legacy and current standards. A channel is defined with a set of sub carriers to transmit the frame.
    Type: Application
    Filed: July 31, 2009
    Publication date: November 19, 2009
    Applicant: BROADCOM CORPORATION
    Inventors: Christopher J. Hansen, Jason Alexander Trachewsky, Rajendra T. Moorti
  • Patent number: 7620099
    Abstract: A baseband processing module according to the present invention includes a multi-path scanner module. The multi-path scanner module is operable to receive timing and scrambling code information regarding an expected multi-path signal component of a WCDMA signal. Then, the multi-path scanner module is operable to identify a plurality of multi-path signal components of the WCDMA signal by descrambling, despreading and correlating a known symbol pattern of/with a baseband RX signal within a search window. The multi-path scanner module is operable to determine timing information for the plurality of multi-path signal components of the WCDMA signal found within the search window and to pass this information to a coupled rake receiver combiner module.
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: November 17, 2009
    Assignee: Broadcom Corporation
    Inventors: Mark David Hahm, Baoguo Yang
  • Patent number: 7619997
    Abstract: An RF front-end includes a transmit adjust module, a PA module, an antenna coupling circuit, a LNA module, and a receive adjust module. The transmit adjust module adjusts coordinates of up-converted analog signals when in a first transmit mode and adjusts coordinates of a plurality of up-converted analog signals when in a second transmit mode to produce to produce multiple adjusted up-converted signals and a plurality of adjusted up-converted signals, respectively, which are subsequently amplified by the PA module. The antenna coupling circuit provides the multiple or the plurality of outbound RF signals to at least some of a plurality of antennas depending on the transmit mode and provides multiple or a plurality of inbound RF signals at least some of the plurality of antennas to the LNA module based on a receive mode. The receive adjust module adjusts coordinates of the multiple or plurality of amplified inbound RF signals based on the receive mode.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: November 17, 2009
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 7620796
    Abstract: A system and method for accelerated processing of streams of dependent instructions, such as those encountered in the G.726 codec, in a microprocessor or microprocessor-based system/chip. In a preferred implementation, a small RISC-like special purpose processor is implemented within a larger general purpose processor for handling the streams of dependent instructions.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: November 17, 2009
    Assignee: Broadcom Corporation
    Inventors: Sophie M. Wilson, Alexander J. Burr
  • Patent number: 7620013
    Abstract: Methods and systems for decoding control channels using repetition redundancy may include generating enhanced soft bits by combining soft bits generated from the two GSM SACCH blocks. Combining may comprise averaging soft bits in one GSM SACCH block and corresponding soft bits from the other GSM SACCH block. Information in one GSM SACCH block may be repeated in the other GSM SACCH block. If repetition is detected, the enhanced soft bits may comprise enhanced soft bits for at least a portion of level 1 region and level 3 region of the GSM SACCH block. Otherwise, the generated enhanced soft bits may comprise enhanced soft bits for at least a portion of level 3 region of the GSM SACCH block.
    Type: Grant
    Filed: January 5, 2006
    Date of Patent: November 17, 2009
    Assignee: Broadcom Corporation
    Inventors: Huaiyu (Hanks) Zeng, Nelson Sollenberger, Arie Heiman
  • Patent number: 7618849
    Abstract: Methods, systems, and apparatuses for integrated circuit packages, and for package stacking, are provided. An electrically conductive frame is attached to a first surface of a substrate. The electrically conductive frame includes a perimeter ring portion, a plurality of leads, and a plurality of interconnect members positioned within a periphery formed by the perimeter ring portion. Each interconnect member is coupled to the perimeter ring portion by a respective lead. A first end of each interconnect member is coupled to the first surface of the substrate. An encapsulating material is applied to the first surface of the substrate, without covering a second end of each interconnect member with the encapsulating material. The perimeter ring portion is removed from the electrically conductive frame to isolate the plurality of interconnect members. A first integrated circuit package is formed in this manner. A second integrated circuit package may be mounted to the first package.
    Type: Grant
    Filed: October 22, 2007
    Date of Patent: November 17, 2009
    Assignee: Broadcom Corporation
    Inventors: Rezaur Rahman Khan, Ken Jian Ming Wang
  • Patent number: 7620371
    Abstract: A single chip radio transceiver includes circuitry that enables received wideband RF signals to be down-converted to baseband frequencies and baseband signals to be up-converted to wideband RF signals prior to transmission without requiring conversion to an intermediate frequency. The circuitry includes a low noise amplifier, automatic frequency control circuitry for aligning a local oscillation frequency with the frequency of the received RF signals, signal power measuring circuitry for measuring the signal to signal and power ratio and for adjusting frontal and rear amplification stages accordingly, and finally, filtering circuitry to filter high and low frequency interfering signals including DC offset.
    Type: Grant
    Filed: August 30, 2004
    Date of Patent: November 17, 2009
    Assignee: Broadcom Corporation
    Inventor: Alireza Zolfaghari
  • Publication number: 20090281803
    Abstract: A speech intelligibility enhancement (SIE) system and method is described that improves the intelligibility of a speech signal to be played back by an audio device when the audio device is located in an environment with loud acoustic background noise. In an embodiment, the audio device comprises a near-end telephony terminal and the speech signal comprises a speech signal received over a communication network from a far-end telephony terminal for playback at the near-end telephony terminal.
    Type: Application
    Filed: May 12, 2009
    Publication date: November 12, 2009
    Applicant: Broadcom Corporation
    Inventors: Juin-Hwey Chen, Jes Thyssen