Patents Assigned to Verticalband, Limited
  • Reliable symbols as a means of improving the performance of information transmission systems
    Patent number: 7143013
    Abstract: All practical communication channels impose some type of corruption on received data through inter-symbol interference (ISI). ISI corruption is particularly acute in high-order constellation transmission. Although ISI effects of high-order constellation transmission are very large on average, some symbols may be received that suffer relatively low levels of ISI. These symbols are “reliable symbols” and can be used to provide blind estimation of the ISI coefficients. Once the ISI effects of a channel are known, all captured signals may be corrected.
    Type: Grant
    Filed: April 18, 2001
    Date of Patent: November 28, 2006
    Assignee: Verticalband, Limited
    Inventors: Eilon Riess, Laurence Turner, Les Sabel, Stuart Schwartz
  • Fast, blind equalization techniques using reliable symbols
    Patent number: 7110923
    Abstract: A fast equalization technique is disclosed for systems using high-order constellations where symbols have been corrupted by data correlated noise (ISI). The technique permits ISI estimation to begin immediately upon receipt of captured samples. Training symbols are not required for the operation of the equalization technique. ISI estimation is weighted in accordance to a reliability factor of each captured sample.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: September 19, 2006
    Assignee: Verticalband, Limited
    Inventors: Eilon Riess, Laurence Turner, Stuart Schwartz
  • Reliable symbols as a means of improving the performance of information transmission systems
    Patent number: 7085691
    Abstract: All practical communication channels impose some type of corruption on received data through inter-symbol interference (ISI). ISI corruption is particularly acute in high-order constellation transmission. Although ISI effects of high-order constellation transmission are very large on average, some symbols may be received that suffer relatively low levels of ISI. These symbols are “reliable symbols” and can be used to provide blind estimation of the ISI coefficients. Once the ISI effects of a channel are known, all captured signals may be corrected.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: August 1, 2006
    Assignee: Verticalband, Limited
    Inventors: Eilon Riess, Laurence Turner, Les Sabel, Stuart Schwartz
  • FAST, BLIND EQUALIZATION TECHNIQUES USING RELIABLE SYMBOLS
    Publication number: 20030016769
    Abstract: A fast equalization technique is disclosed for systems using high-order constellations where symbols have been corrupted by data correlated noise (ISI). The technique permits ISI estimation to begin immediately upon receipt of captured samples. Training symbols are not required for the operation of the equalization technique. ISI estimation is weighted in accordance to a reliability factor of each captured sample.
    Type: Application
    Filed: July 9, 2001
    Publication date: January 23, 2003
    Applicant: Verticalband, Limited
    Inventors: Eilon Riess , Laurence Turner , Stuart Schwartz
  • FAST, BLIND EQUALIZATION TECHNIQUES USING RELIABLE SYMBOLS
    Publication number: 20020080896
    Abstract: A fast equalization technique is disclosed for systems using high-order constellations where symbols have been corrupted by data correlated noise (ISI). The technique permits ISI estimation to begin immediately upon receipt of captured samples. Training symbols are not required for the operation of the equalization technique. ISI estimation is weighted in accordance to a reliability factor of each captured sample.
    Type: Application
    Filed: July 9, 2001
    Publication date: June 27, 2002
    Applicant: Verticalband, Limited
    Inventors: Eilon Riess , Laurence Turner , Stuart Schwartz