Patents by Inventor Gaurav Davra

Gaurav Davra 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).

  • Decoder with M-AT-A-Time Traceback
    Patent number: 7404139
    Abstract: A Maximum Likelihood Sequence Estimation (MLSE) decoder that decodes an encoded sequence of data symbols includes a branch metric unit for computing branch metrics for each trellis stage of the encoded sequence, a path metric unit for computing a path metric for each trellis stage using the computed branch metrics, and an M-at-a-time traceback unit for performing an M-at-a-time traceback operation using the computed path metrics. The M-at-a-time traceback operation generates M decoded data symbols in a single M-at-a-time traceback operation.
    Type: Grant
    Filed: January 21, 2005
    Date of Patent: July 22, 2008
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Mohit K. Prasad, Nitin Vig, Arnab K. Mitra, Amrit P. Singh, Gaurav Davra
  • MULTI-RATE VITERBI DECODER
    Publication number: 20070201586
    Abstract: A method and system for decoding a data symbol sequence that has been previously encoded using one or more unique code word polynomials in which at least one unique code word polynomial is used more than once. A set of 2d-1 unique branch metrics is computed, using the unique code word polynomials, where d is the number of unique code word polynomials. The computed set of 2d-1 unique branch metrics is stored in a memory. Path metrics are then calculated, based on the stored set of 2d-1 unique branch metrics. A decoded data symbol sequence is generated based on the computed path metrics.
    Type: Application
    Filed: May 2, 2007
    Publication date: August 30, 2007
    Applicant: FREESCALE SEMICONDUCTOR, INC.
    Inventors: Mohit Prasad, Gaurav Davra, Arnab Mitra, Amrit Singh, Nitin Vig
  • Multi-rate viterbi decoder
    Patent number: 7231586
    Abstract: A method and system for decoding a data symbol sequence that has been previously encoded using one or more unique code word polynomials in which at least one unique code word polynomial is used more than once. A set of 2d-1 unique branch metrics is computed, using the unique code word polynomials, where d is the number of unique code word polynomials. The computed set of 2d-1 unique branch metrics is stored in a memory. Path metrics are then calculated, based on the stored set of 2d-1 unique branch metrics. A decoded data symbol sequence is generated based on the computed path metrics.
    Type: Grant
    Filed: July 21, 2004
    Date of Patent: June 12, 2007
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Mohit K. Prasad, Gaurav Davra, Arnab K. Mitra, Amrit P. Singh, Nitin Vig
  • Decoder with M-at-a-time traceback
    Publication number: 20060168502
    Abstract: A Maximum Likelihood Sequence Estimation (MLSE) decoder that decodes an encoded sequence of data symbols includes a branch metric unit for computing branch metrics for each trellis stage of the encoded sequence, a path metric unit for computing a path metric for each trellis stage using the computed branch metrics, and an M-at-a-time traceback unit for performing an M-at-a-time traceback operation using the computed path metrics. The M-at-a-time traceback operation generates M decoded data symbols in a single M-at-a-time traceback operation.
    Type: Application
    Filed: January 21, 2005
    Publication date: July 27, 2006
    Inventors: Mohit Prasad, Nitin Vig, Arnab Mitra, Amrit Singh, Gaurav Davra
  • Multi-rate viterbi decoder
    Publication number: 20060020875
    Abstract: A method and system for decoding a data symbol sequence that has been previously encoded using one or more unique code word polynomials in which at least one unique code word polynomial is used more than once. A set of 2d-1 unique branch metrics is computed, using the unique code word polynomials, where d is the number of unique code word polynomials. The computed set of 2d-1 unique branch metrics is stored in a memory. Path metrics are then calculated, based on the stored set of 2d-1 unique branch metrics. A decoded data symbol sequence is generated based on the computed path metrics.
    Type: Application
    Filed: July 21, 2004
    Publication date: January 26, 2006
    Inventors: Mohit Prasad, Gaurav Davra, Arnab Mitra, Amrit Singh, Nitin Vig