Patents by Inventor Amit G. Bagchi

Amit G. Bagchi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8654892
    Abstract: An arrangement of interleavers allocates bits from an input symbol across sub-symbols transmitted via sub-carriers of multiple orthogonal frequency division multiplex (OFDM) carriers. The input bits are allocated in a fashion to provide separation across subcarriers, and rotation of sub-symbols across the OFDM carriers provides additional robustness in the present of signal path impairments.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: February 18, 2014
    Assignee: Broadcom Corporation
    Inventors: Carlos H. Aldana, Amit G. Bagchi, Min Chuin Hoo
  • Patent number: 8630367
    Abstract: Methods, devices and systems for wireless communication generate signals by determining whether legacy devices are within a proximal region of the wireless communication. When at least one legacy device is within the proximal region, a frame is formatted to include a preamble field, a signal field, and a data field. Further, the uncoded bits are encoded according to a coding format. The coding format is determined according to bits in the preamble and applicable sub-field lengths.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: January 14, 2014
    Assignee: Broadcom Corporation
    Inventors: Christopher J. Hansen, Jason Alexander Trachewsky, Amit G. Bagchi, George Kondylis
  • Patent number: 8548409
    Abstract: A receiver front end includes a plurality of in-phase and quadrature phase receive processing blocks operable at first and second frequency bands and further includes a plurality of filtering and amplification blocks disposed within a corresponding ingoing signal path, a plurality of received signal strength indicator (RSSI) blocks coupled to receive an ingoing analog signal from a corresponding plurality of nodes disposed throughout the ingoing signal path, each of the plurality of RSSI blocks producing a signal strength indication, and wherein a baseband processor is operable to receive a selected signal strength indication and to produce at least one gain setting to at least one amplification block within the in-phase or quadrature phase receive processing blocks. In operation, the baseband processor receives a signal strength indication from each RSSI block to determine a total amount of gain and appropriate gain distribution within the receive signal path.
    Type: Grant
    Filed: September 15, 2012
    Date of Patent: October 1, 2013
    Assignee: Broadcom Corporation
    Inventor: Amit G. Bagchi
  • Publication number: 20130142280
    Abstract: An arrangement of interleavers allocates bits from an input symbol across sub-symbols transmitted via sub-carriers of multiple orthogonal frequency division multiplex (OFDM) carriers. The input bits are allocated in a fashion to provide separation across subcarriers, and rotation of sub-symbols across the OFDM carriers provides additional robustness in the present of signal path impairments.
    Type: Application
    Filed: January 30, 2013
    Publication date: June 6, 2013
    Applicant: Broadcom Corporation
    Inventors: Carlos H. Aldana, Amit G. Bagchi, Min Chuin Hoo
  • Patent number: 8400991
    Abstract: A method for wireless communication begins by determining whether legacy devices are within a proximal region of the wireless communication. The method continues, when at least one legacy device is within the proximal region, formatting a frame to include: a legacy preamble; a signal field; an extended preamble; at least one additional signal field; at least one service field; an inter frame gap; and a data field.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: March 19, 2013
    Assignee: Broadcom Corporation
    Inventors: Jason A. Trachewsky, George Kondylis, Amit G. Bagchi
  • Patent number: 8391387
    Abstract: An arrangement of interleavers allocates bits from an input symbol across sub-symbols transmitted via sub-carriers of multiple orthogonal frequency division multiplex (OFDM) carriers. The input bits are allocated in a fashion to provide separation across subcarriers, and rotation of sub-symbols across the OFDM carriers provides additional robustness in the present of signal path impairments.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: March 5, 2013
    Assignee: Broadcom Corporation
    Inventors: Carlos H. Aldana, Amit G. Bagchi, Min Chuin Hoo
  • Publication number: 20130010847
    Abstract: A receiver front end includes a plurality of in-phase and quadrature phase receive processing blocks operable at first and second frequency bands and further includes a plurality of filtering and amplification blocks disposed within a corresponding ingoing signal path, a plurality of received signal strength indicator (RSSI) blocks coupled to receive an ingoing analog signal from a corresponding plurality of nodes disposed throughout the ingoing signal path, each of the plurality of RSSI blocks producing a signal strength indication, and wherein a baseband processor is operable to receive a selected signal strength indication and to produce at least one gain setting to at least one amplification block within the in-phase or quadrature phase receive processing blocks. In operation, the baseband processor receives a signal strength indication from each RSSI block to determine a total amount of gain and appropriate gain distribution within the receive signal path.
    Type: Application
    Filed: September 15, 2012
    Publication date: January 10, 2013
    Applicant: BROADCOM CORPORATION
    Inventor: Amit G. Bagchi
  • Publication number: 20120269135
    Abstract: A method for wireless communication begins by determining whether legacy devices are within a proximal region of the wireless communication. The method continues, when at least one legacy device is within the proximal region, formatting a frame to include: a legacy preamble; a signal field; an extended preamble; at least one additional signal field; at least one service field; an inter frame gap; and a data field.
    Type: Application
    Filed: June 29, 2012
    Publication date: October 25, 2012
    Applicant: BROADCOM CORPORATION
    Inventors: Jason A. Trachewsky, George Kondylis, Amit G. Bagchi
  • Patent number: 8295797
    Abstract: A receiver front end includes a plurality of in-phase and quadrature phase receive processing blocks operable at first and second frequency bands and further includes a plurality of filtering and amplification blocks disposed within a corresponding ingoing signal path, a plurality of received signal strength indicator (RSSI) blocks coupled to receive an ingoing analog signal from a corresponding plurality of nodes disposed throughout the ingoing signal path, each of the plurality of RSSI blocks producing a signal strength indication, and wherein a baseband processor is operable to receive a selected signal strength indication and to produce at least one gain setting to at least one amplification block within the in-phase or quadrature phase receive processing blocks. In operation, the baseband processor receives a signal strength indication from each RSSI block to determine a total amount of gain and appropriate gain distribution within the receive signal path.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventor: Amit G. Bagchi
  • Patent number: 8233465
    Abstract: A method for wireless communication begins by determining whether legacy devices are within a proximal region of the wireless communication. The method continues, when at least one legacy device is within the proximal region, formatting a frame to include: a legacy preamble; a signal field; an extended preamble; at least one additional signal field; at least one service field; an inter frame gap; and a data field.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: July 31, 2012
    Assignee: Broadcom Corporation
    Inventors: Jason A. Trachewsky, George Kondylis, Amit G. Bagchi
  • Publication number: 20120140758
    Abstract: Methods, devices and systems for wireless communication generate signals by determining whether legacy devices are within a proximal region of the wireless communication. When at least one legacy device is within the proximal region, a frame is formatted to include a preamble field, a signal field, and a data field. Further, the uncoded bits are encoded according to a coding format. The coding format is determined according to bits in the preamble and applicable sub-field lengths.
    Type: Application
    Filed: December 12, 2011
    Publication date: June 7, 2012
    Applicant: BROADCOM CORPORATION
    Inventors: Christopher J. Hansen, Jason Alexander Trachewsky, Amit G. Bagchi, George Kondylis
  • Publication number: 20120140613
    Abstract: An arrangement of interleavers allocates bits from an input symbol across sub-symbols transmitted via sub-carriers of multiple orthogonal frequency division multiplex (OFDM) carriers. The input bits are allocated in a fashion to provide separation across subcarriers, and rotation of sub-symbols across the OFDM carriers provides additional robustness in the present of signal path impairments.
    Type: Application
    Filed: February 14, 2012
    Publication date: June 7, 2012
    Applicant: BROADCOM CORPORATION
    Inventors: Carlos H. Aldana, Amit G. Bagchi, Min Chuin Hoo
  • Patent number: 8139659
    Abstract: An arrangement of interleavers allocates bits from an input symbol across sub-symbols transmitted via sub-carriers of multiple orthogonal frequency division multiplex (OFDM) carriers. The input bits are allocated in a fashion to provide separation across subcarriers, and rotation of sub-symbols across the OFDM carriers provides additional robustness in the present of signal path impairments.
    Type: Grant
    Filed: May 25, 2005
    Date of Patent: March 20, 2012
    Assignee: Broadcom Corporation
    Inventors: Carlos H. Aldana, Amit G. Bagchi, Min Chuin Hoo
  • Patent number: 8094749
    Abstract: Methods, devices and systems for wireless communication generate signals by determining whether legacy devices are within a proximal region of the wireless communication. When at least one legacy device is within the proximal region, a frame is formatted to include a preamble field, a signal field, and a data field. Further, the uncoded bits are encoded according to a coding format. The coding format is determined according to bits in the preamble and applicable sub-field lengths.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: January 10, 2012
    Assignee: Broadcom Corporation
    Inventors: Christopher J. Hansen, Jason Alexander Trachewsky, Amit G. Bagchi, George Kondylis
  • Patent number: 8081687
    Abstract: A receiver includes digital logic for defining a plurality of signal paths for an ingoing digital signal to determine a frame classification. Frames are classified according to a combination of readings of a plurality of correlation block and relative signal (power) strengths. Power detection is specified for frequency bands of interest. The combination of readings and their corresponding pattern may be used to determine whether a frame is being transmitted in a lower bandwidth channel, an upper bandwidth channel or a large bandwidth channel that overlaps the lower and upper bandwidth channels. A transmission type (legacy, mixed mode, Greenfield) may subsequently be determined based upon the identity of the frame channel.
    Type: Grant
    Filed: October 4, 2006
    Date of Patent: December 20, 2011
    Assignee: Broadcom Corporation
    Inventors: Amit G. Bagchi, Rajendra Tushar Moorti
  • Publication number: 20110235628
    Abstract: A method for wireless communication begins by determining whether legacy devices are within a proximal region of the wireless communication. The method continues, when at least one legacy device is within the proximal region, formatting a frame to include: a legacy preamble; a signal field; an extended preamble; at least one additional signal field; at least one service field; an inter frame gap; and a data field.
    Type: Application
    Filed: June 3, 2011
    Publication date: September 29, 2011
    Applicant: BROADCOM CORPORATION
    Inventors: Jason A. Trachewsky, George Kondylis, Amit G. Bagchi
  • Patent number: 7991430
    Abstract: Classifier for communication device. A communication device includes a classifier and a number of PHY (physical layer) receivers communicatively coupled thereto that enable the communication device to process various received signal types. Each of the PHY receivers is operable to perform pre-processing of a received frame (or packet) of data and to calculate a confidence level indicating whether the received frame is intended for that particular PHY receiver; this pre-processing does not involve processing (e.g., demodulation and/or decoding) of the received frame. Those PHY receivers having sufficiently high confidence levels assert claims to the classifier for the received frame. The classifier is operable to arbitrate between competing claims by 2 or more PHY receivers and to ensure that the received frame is provided to the PHY receiver for which it is intended.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: August 2, 2011
    Assignee: Broadcom Corporation
    Inventors: Amit G. Bagchi, Joseph Paul Lauer, Srinivasa H. Garlapati, Rohit V. Gaikwad, Joonsuk Kim, Paul Anthony Lettieri
  • Patent number: 7986679
    Abstract: A method for wireless communication begins by determining whether legacy devices are within a proximal region of the wireless communication. The method continues, when at least one legacy device is within the proximal region, formatting a frame to include: a legacy preamble; a signal field; an extended preamble; at least one additional signal field; at least one service field; an inter frame gap; and a data field.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: July 26, 2011
    Assignee: Broadcom Corporation
    Inventors: Jason A. Trachewsky, George Kondylis, Amit G. Bagchi
  • Patent number: 7924764
    Abstract: Frame processing for a wireless communication system. The frame processing includes detecting reception of a frame based on a portion of a preamble of a frame, wherein the frame includes a preamble and a data payload. With detecting the reception of a frame, determining a frame type of a plurality of frame types from at least the portion of the preamble. Processing a remaining portion of the preamble in accordance with the frame type to determine payload processing parameters, and processing the data payload based on the payload processing parameters.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: April 12, 2011
    Assignee: Broadcom Corporation
    Inventors: Rajendra Tushar Moorti, Rohit V. Gaikwad, Amit G. Bagchi
  • Publication number: 20100232411
    Abstract: A method for wireless communication begins by determining whether legacy devices are within a proximal region of the wireless communication. The method continues, when at least one legacy device is within the proximal region, formatting a frame to include: a legacy preamble; a signal field; an extended preamble; at least one additional signal field; at least one service field; an inter frame gap; and a data field.
    Type: Application
    Filed: May 24, 2010
    Publication date: September 16, 2010
    Applicant: BROADCOM CORPORATION
    Inventors: Jason A. Trachewsky, George Kondylis, Amit G. Bagchi