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:
Dec. 09, 2008
Filed:
Mar. 10, 2003
Alberto Ginesi, Noordwijk, NL;
Song Zhang, Kanata, CA;
Andrew Deczky, Ottawa, CA;
Duncan Baird, Nepean, CA;
Christian Bourget, Hull, CA;
Alberto Ginesi, Noordwijk, NL;
Song Zhang, Kanata, CA;
Andrew Deczky, Ottawa, CA;
Duncan Baird, Nepean, CA;
Christian Bourget, Hull, CA;
CIENA Corporation, Linthicum, MD (US);
Abstract
A circuit and method is provided for reducing the effect of having potentially different sizes for an Inverse Discrete Fourier Transform (IDFT) at a transmitter and a Discrete Fourier Transform (DFT) at a receiver in a telecommunications system without requiring a change in the DFT's size. The method includes following steps. The first step includes determining whether the IDFT size is greater than, equal to, or less than the DFT size. The second step includes selecting a target impulse response length from a predefined set of impulse response lengths in accordance with a result the previous step. The third step includes training an equalizer at the receiver to the target impulse response length. The circuit comprises hardware and software for implementing the method.