Patent ID: 6424985
Filing Date: 2002-07-23
Classification: G06F,H03H

Abstract:
A method for filtering signals from a nonlinear dynamical systems, comprising the steps of:(a) setting an initial enhanced point to a noisy point obtained from the signals; (b) estimating a deviation term between the initial enhanced point and the noisy point; (c) weighting the estimated deviation term to prevent divergence in computing a new enhanced point; (d) computing a new enhanced point; and (e) iterating the steps (b) to (d) until the computed enhanced point converges to a true enhanced point which represents a noise reduced signal to provide filtered signals, wherein the step of computing the new enhanced point includes computing a new enhanced point in accordance with {circumflex over (x)}n(i)={circumflex over (x)}n(iâˆ’1)âˆ’K1K2&wcirc;n(i) wherein xn(i) is the new enhanced point for data point n at iteration i, xn(iâˆ’1) is the prior enhanced point, K1 and K2 are weighting coefficients and &wcirc;n(i) is the deviation term at iteration i.