Patent ID: 6782042
Filing Date: 2004-08-24
Classification: H04L

Abstract:
A DMT modem comprising:an arithmetic unit for estimating a channel impulse response for a DMT signal using an autocorrelation function defined by: Ry&af;(k)=&Sum;m&it;â€ƒ&it;&Sum;u&it;â€ƒ&it;h&af;(m)&it;h&af;(u)&it;E&it;{x&af;(iD-m)&it;x&af;(iD+N+k-u)}â€ƒwhere h is an impulse response, x is and input signal, E is the expectation operator, D is a transmission block length, N is an information block length and k is an index used to count samples in the autocorrelation function Ry(k) in increments from 0 to an upper limit.