Patents Assigned to Broadcom Corporation, a California Corporation
  • Publication number: 20080079542
    Abstract: An RFID carrier includes a receive module, an oscillation module, a transmit module, and a power source module. The receive module is coupled to recover signaling information from an RFID signal to produce recovered signaling information. The oscillation module is coupled to generate at least one oscillation based on the recovered signaling information. The transmit module is coupled to convert the recovered signaling information into a repeat RFID signal based on an oscillation of the at least one oscillation. The power source module is coupled to provide at least one supply voltage to at least one of the receive module, the oscillation module, and the transmit module.
    Type: Application
    Filed: September 26, 2006
    Publication date: April 3, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20080082868
    Abstract: Novel decoding approach is presented, by which, updated bit edge messages corresponding to a sub-matrix of an LDPC matrix are immediately employed for updating of the check edge messages corresponding to that sub-matrix without requiring storing the bit edge messages; also updated check edge messages corresponding to a sub-matrix of the LDPC matrix are immediately employed for updating of the bit edge messages corresponding to that sub-matrix without requiring storing the check edge messages. Using this approach, twice as many decoding iterations can be performed in a given time period when compared to a system that performs updating of all check edge messages for the entire LDPC matrix, then updating of all bit edge messages for the entire LDPC matrix, and so on. When performing this overlapping approach in conjunction with min-sum processing, significant memory savings can also be achieved.
    Type: Application
    Filed: February 21, 2007
    Publication date: April 3, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Hau Thien Tran, Kelly Brian Cameron, Ba-Zhong Shen, Tak K. Lee
  • Publication number: 20080079541
    Abstract: A radio frequency (RF) transceiver includes an RF transmitter that generates an outbound RF signal at a carrier frequency that is based on a transmitter local oscillation. An RF front-end receives an inbound RF signal that includes a desired signal component that is based on the outbound RF signal and that includes an undesired signal component. The RF front-end includes a first RF combiner module that attenuates the undesired signal component to produce a desired RF signal. A down conversion module generates a down converted signal from the desired RF signal based on a receiver local oscillation. A receiver processing module generates inbound data from the down converted signal. A frequency control module controls a frequency of the transmitter local oscillation and a frequency of the receiver local oscillation, based on an interference rejection signal, to control the attenuation of the undesired signal component.
    Type: Application
    Filed: September 15, 2006
    Publication date: April 3, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20080081670
    Abstract: A multiple frequency antenna array includes a first antenna circuit and a second antenna circuit. The first antenna circuit has a first radiation pattern and is tuned to a first carrier frequency. The first antenna circuit transmits a first representation of a radio frequency (RF) signal at the first carrier frequency, where the first carrier frequency corresponds to a carrier frequency of the RF signal and a first frequency offset. The second antenna circuit has a second radiation pattern and is tuned to a second carrier frequency. The second antenna circuit transmits a second representation of the RF signal at the second carrier frequency, where the second carrier frequency corresponds to the carrier frequency of the RF signal and a second frequency offset.
    Type: Application
    Filed: September 28, 2006
    Publication date: April 3, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20080079586
    Abstract: A hybrid on-chip-off-chip transformer includes an off-chip winding section and an on-chip winding section. The off-chip winding section is coupled to produce a first electromagnetic signal from a reference source. The on-chip winding section is coupled to derive a second electromagnetic signal from the first electromagnetic signal when the on-chip winding section is with in a proximal coupling distance of the off-chip winding section.
    Type: Application
    Filed: September 28, 2006
    Publication date: April 3, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20080082264
    Abstract: Global Positioning System (GPS) route creation via server interaction or wireless terminal collection creates a GPS route data file that includes starting location GPS coordinates, ending location GPS coordinates, and at least one way point location data element. Each way point location data element includes respective way point location GPS coordinates and a respective link to a corresponding digital photograph data file. Wireless terminals having corresponding sensors collect local meteorological conditions that are associated with digital photographs and GPS coordinates at capture. The digital photographs, GPS coordinates at capture, and local meteorological conditions are used to produce local weather reports for requesting client terminals. Virtual tours could also be conducted using the captured digital photograph files.
    Type: Application
    Filed: November 7, 2006
    Publication date: April 3, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Ryan Hill, Jeyhan Karaoguz, Nambirajan Seshadri
  • Publication number: 20080080597
    Abstract: An RF transceiver includes a low noise amplifier module, a blocking circuit, a down-conversion module, a processing module, an up-conversion module, and a power amplifier module. The low noise amplifier module amplifies inbound RF signals. The blocking circuit, when enabled, substantially attenuates a blocking signal and passes, substantially unattenuated, desired receive RF signals of the inbound RF signals. The down-conversion module converts the amplified inbound RF signals or the desired receive RF signals into inbound baseband or low IF signals. The processing module converts the inbound baseband or low IF signals into inbound data, converts outbound data into outbound baseband or low IF signals, determines a transmit power level, and determines whether to enable the blocking circuit based on the transmit power level. The up-conversion module converts the outbound baseband or low IF signals into outbound RF signals, which are amplified by the power amplifier module.
    Type: Application
    Filed: September 28, 2006
    Publication date: April 3, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20080081571
    Abstract: A power amplifier module includes a transmit power probability module and a power amplifier circuit. The transmit power probability module is coupled to determine a transmit power level probability. The power amplifier circuit is coupled to amplify an outbound radio frequency (RF) signal at a power level in accordance with the transmit power level probability and a desired transmit power level.
    Type: Application
    Filed: September 28, 2006
    Publication date: April 3, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20080076366
    Abstract: A multiple band antenna structure includes a plurality of antenna sections and a coupling circuit. The coupling circuit is operable in a first mode to couple the plurality of antenna sections into a first antenna structure for transceiving radio frequency signals within a first radio frequency band and is operable in a second mode to couple the plurality of antenna sections into a second antenna structure for transceiving radio frequency signals within a second radio frequency band, where each of the plurality of antenna sections is tuned to a corresponding frequency band.
    Type: Application
    Filed: September 27, 2006
    Publication date: March 27, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Ahmadreza Reza Rofougaran
  • Publication number: 20080075146
    Abstract: A (radio frequency) RF transmission system includes an RF transmitter that generates an RF signal at a sequence of selected carrier frequencies. A frequency hop module, coupled to the RF transmitter generates the sequence of selected carrier frequencies. A programmable antenna is tuned to each of the sequence of selected carrier frequencies to transmit the RF signal via an antenna current.
    Type: Application
    Filed: September 22, 2006
    Publication date: March 27, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20080075148
    Abstract: A system for processing radio frequency (RF) signals includes a searcher and a Cluster Path Processor (CPP). The searcher detects a maximum signal energy level and position of at least one of a plurality of individual distinct path signals in a signal cluster, wherein at least a portion of the plurality of individual distinct path signals is received within a duration of a corresponding delay spread. The CPP includes a group finger array having a plurality of group fingers and determines a coarse sampling position of the group finger array based upon the position of the at least one of a plurality of individual distinct path signals in the signal cluster. The CPP determines a fine sampling position based upon determines a composite channel energy estimate for the plurality of individual distinct path signals. Using this fine sampling position, the CPP receives at least a portion of the plurality of individual distinct path signals by the group finger array.
    Type: Application
    Filed: September 21, 2006
    Publication date: March 27, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Junqiang Li, Mark David Hahm, Li Fung Chang
  • Publication number: 20080075189
    Abstract: A Radio Frequency (RF) receiver includes a RF front end and a baseband processing module coupled to the RF front end that is operable to receive a time domain signal that includes multiple information signals, each having training symbols and time domain data symbols. The baseband processing module includes a channel estimator that processes the training symbols to produce respective time domain channel estimates, a Fast Fourier Transformer converts the time domain channel estimates to the frequency domain to produce frequency domain channel estimates, a weight calculator operable to produce frequency domain equalizer coefficients based upon the frequency domain channel estimates, an Inverse Fast Fourier Transformer operable to convert the frequency domain equalizer coefficients to the time domain to produce time domain equalizer coefficients, and an equalizer operable to equalize the time domain data symbols using the time domain equalizer coefficients.
    Type: Application
    Filed: November 7, 2006
    Publication date: March 27, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Junqiang Li, Nelson R. Sollenberger
  • Publication number: 20080075179
    Abstract: A baseband processing module of a Radio Frequency receiver produces time domain equalizer coefficients and calculates a power threshold based upon a total power of a plurality of taps of the time domain equalizer coefficients. The baseband processing module then performs a plurality of iterations, during each of which it identifies at least one minimum power tap and determines a total power figure based upon zeroing the at least one minimum power tap. When the total power figure compares favorably to the power threshold, the baseband processing module modifies the plurality of taps by zeroing the at least one minimum power tap and continuing iterating. When the total power figure compares unfavorably to the power threshold, the baseband processing module ceases iterating without modifying the plurality of taps by zeroing the at least one minimum power tap and then produces modified time domain equalizer coefficients.
    Type: Application
    Filed: November 20, 2006
    Publication date: March 27, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Junqiang Li
  • Publication number: 20080075208
    Abstract: A Radio Frequency (RF) receiver includes a RF front end and a baseband processing module coupled to the RF front end that is operable to receive a time domain signal that includes desired signal and interfering signal time domain training symbols and time domain data symbols.
    Type: Application
    Filed: September 21, 2006
    Publication date: March 27, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Junqiang Li, Nelson R. Sollenberger, Joseph Boccuzzi, Li Fung Chang
  • Publication number: 20080075149
    Abstract: A method for operating a Radio Frequency (RF) receiver of a wireless terminal. During a first time interval, an RF front end is enabled and the RF receiver receives and processes an RF signal, e.g., a Wideband Code Division Multiple Access (WCDMA) signal, to produce a baseband signal and to store samples of the baseband signal. During a second time interval that differs from the first time interval, the RF front end is disabled and the RF receiver processes the plurality of samples of the baseband signal of the first time interval to measure signal strengths of a plurality of pilot signals present in the baseband signal of the first time interval. Finally, during a third time interval that differs from the first time interval and the second time interval, the RF front end is enabled and the RF receiver receives and processes an RF signal of the third time interval to extract data there from. Memory is shared between the first, second, and third time intervals for different uses.
    Type: Application
    Filed: September 21, 2006
    Publication date: March 27, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Louis Jacobus Botha, Frederic Christian Hayem, Hendrik Johannes Conroy
  • Publication number: 20080075021
    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: Application
    Filed: September 27, 2006
    Publication date: March 27, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Ahmadreza Reza Rofougaran
  • Publication number: 20080075154
    Abstract: An integrated circuit includes a baseband processing module, an RF section, and an interface module. The baseband processing module converts an outbound voice signal into an outbound voice symbol stream; converts an inbound voice symbol stream into an inbound voice signal; converts outbound data into an outbound data symbol stream; converts an inbound data symbol stream into inbound data; converts outbound image/video data into an outbound image/video symbol stream; and converts an inbound image/video symbol stream into inbound image/video data.
    Type: Application
    Filed: February 26, 2007
    Publication date: March 27, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20080076354
    Abstract: A cable modem includes a cable transceiver, coupled to a wide area network via a cable network, that operates operating in accordance with a first wired communication protocol. A first radio frequency (RF) transceiver provides a first remote device bidirectional broadband access to the wide area network via a first short range radio frequency link operating at a first selected carrier frequency. A programmable antenna is dynamically tuned to the first selected carrier frequency to transmit and receive an RF signal over the first short range radio frequency link.
    Type: Application
    Filed: September 26, 2006
    Publication date: March 27, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20080076476
    Abstract: An RF transmission system includes a plurality of RF transmitters that generate a plurality of RF signals at a selected carrier frequency in response to a frequency selection signal. A plurality of programmable antennas are each tuned to the selected carrier frequency, in response to the frequency selection signal, to transmit a corresponding one of the plurality of RF signals.
    Type: Application
    Filed: September 22, 2006
    Publication date: March 27, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Ahmadreza(Reza) Rofougaran
  • Publication number: 20080075158
    Abstract: A Radio Frequency (RF) receiver includes a RF front end and a baseband processing module coupled to the RF front end that is operable to determine equalizer coefficients for a composite signal that includes a first information signal and a second information signal. First and second information signal channel estimates and channel powers based upon training symbols are determined. A composite signal power is determined. A noise variance of the composite signal is determined based upon the first information signal channel power, the second information signal channel power, and the composite signal power. A plurality of equalizer coefficients are determined based upon the first information signal channel estimate, the second information signal channel estimate, and the noise variance of the composite signal.
    Type: Application
    Filed: December 15, 2006
    Publication date: March 27, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventor: Junqiang Li