Patents Represented by Attorney McDonnell Beohnen Hulbert Berghoff LLP

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  • Method for achieving symbol alignment to a pre-existing ADSL data exchange
    Patent number: 7277517
    Abstract: A method for determining symbol boundaries in an ADSL modem, comprising receiving multi-frequency modulated signals in the time domain, wherein the multi-frequency modulated signals include a pilot signal at a pilot frequency. Performing a time-to-frequency transform on the multi-frequency modulated signals to recover the pilot signal. Iteratively computing a phase error for the pilot signal over a number of transform regions. Selecting the transform region with the lowest phase error.
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: October 2, 2007
    Assignee: 3Com Corporation
    Inventors: Timothy F. Murphy, Martin Staszak