	US 7,463,678 B2
	Equalization scheme for DSL receivers in presence of an under-sampled or over-sampled transmit IDFT
Alberto Ginesi, Noordwijk (Netherlands); Song Zhang, Kanata (Canada); Andrew Deczky, Ottawa (Canada); Duncan Baird, Nepean (Canada); and Christian Bourget, Hull (Canada)
Assigned to CIENA Corporation, Linthicum, Md. (US)
Filed on Mar. 10, 2003, as Appl. No. 10/386,391.
Claims priority of application No. 2375823 (CA), filed on Mar. 11, 2002.
Prior Publication US 2004/0004936 A1, Jan. 08, 2004
Int. Cl. H03H 7/30 (2006.01); H03H 7/40 (2006.01); H03K 5/159 (2006.01)

U.S. Cl. 375—231 [375/232; 375/260; 708/232; 708/233]

16 Claims

1. A method of reducing an 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 to a DFT size of said DFT, said method comprising the steps of:

(a) determining whether an IDFT size of said IDFT is greater than, equal to, or less than said DFT size;

(b) selecting a target impulse response length of a desired channel impulse response from a predefined set of impulse response lengths in accordance with a result of step (a); and