Patents by Inventor Raul Alejandro Casas

Raul Alejandro Casas 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).

  • LEAST SQUARES MATRIX COMPRESSION AND DECOMPRESSION IN A DIGITAL TELEVISION RECEIVER
    Publication number: 20120281145
    Abstract: The current application is directed to reducing the implementation cost of least squares (LS) channel estimation in a digital communications receiver. An inverse correlation matrix is compressed on a per-diagonal basis for low cost storage in the receiver. The inverse correlation matrix is decompressed and utilized online on a per-diagonal basis.
    Type: Application
    Filed: May 7, 2012
    Publication date: November 8, 2012
    Inventors: Raúl Alejandro Casas, Stephen Biracree, Anand Mahendra Shah, Slobodan Simovich, Thomas Joseph Endres
  • COHERENT SYNCHRONIZATION AND FRAMING IN A DIGITAL TELEVISION RECEIVER
    Publication number: 20120281140
    Abstract: The current application is directed to maintaining the correct number of symbols in a protocol frame in a digital communications receiver, to prevent catastrophic failure due to dynamic multipath or cycle slips. Timing recovery and framing are coherent, facilitated by placing channel estimation directly into a larger timing recovery loop.
    Type: Application
    Filed: May 7, 2012
    Publication date: November 8, 2012
    Inventors: Raul Alejandro Casas, Stephen Biracree, Anand Mahendra Shah, Slobodan Simovich, Thomas Joseph Endres
  • Method and apparatus for joint decoding and equalization
    Patent number: 8170128
    Abstract: The present invention is related to joint trellis decoding and equalization using a decision feedback equalizer.
    Type: Grant
    Filed: August 26, 2008
    Date of Patent: May 1, 2012
    Assignee: Iberium Communications, Inc.
    Inventors: Raul Alejandro Casas, Stephen Leonard Biracree, Slobodan Simovich, Thomas Joseph Endres
  • Channel identification, emulation, and frame synchronization for digital television signals
    Publication number: 20090296799
    Abstract: The present invention is related to channel identification, equalizer initialization, and framing synchronization of GB 20600-2006 digital television signals. In one embodiment, the present invention provides, in a communications receiver having an equalizer that processes GB 20600-2006 digital television signals that include payload data, a method that initializes the equalizer coefficients for processing the payload data comprising: identifying a channel estimate based on correlation techniques; producing known, mock received data and filtering the mock, received data through the channel estimate to produce mock filtered data; adjusting the equalizer coefficients with the mock received data or the mock filtered data to obtain an initial equalizer setting; and processing the payload data with the initial equalizer setting.
    Type: Application
    Filed: March 10, 2009
    Publication date: December 3, 2009
    Inventors: Raul Alejandro Casas, Stephen Leonard Biracree, Slobodan Simovich, Thomas Joseph Endres
  • Method and apparatus for joint decoding and equalization
    Publication number: 20090067486
    Abstract: The present invention is related to joint trellis decoding and equalization using a decision feedback equalizer.
    Type: Application
    Filed: August 26, 2008
    Publication date: March 12, 2009
    Inventors: Raul Alejandro Casas, Stephen Leonard Biracree, Slobodan Simovich, Thomas Joseph Endres