The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 30, 1999
Filed:
Oct. 28, 1996
Peter R Molnar, Austin, TX (US);
Jeffrey P Gleason, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A method and apparatus for performing DMT frame synchronization in an ADSL system begins by providing a training signal (82) to a receiver of the ADSL system (34). The training signal (82) is processed to result in a desired impulse response. The impulse response is used to reduce inter-symbol interference between time-adjacent DMT frames (100-108). The desired impulse response is used to calculate a frame misalignment value (.DELTA.T). The frame misalignment value (.DELTA.T) of the desired impulse response (84) is then utilized to adjust an internal counter of the receiver to perform frame alignment. The use of the training signal (82) and impulse response (84) to provide for both intersymbol interference reduction (FIG. 5) and frame synchronization (FIG. 8) provides for fast ADSL initialization.