Patent ID: 6684233
Filing Date: 2004-01-27
Classification: H04L

Abstract:
An adaptive filter system that is employed in data transmission having a non-recursive filter that updates tap weights, said filter system comprising:a receiving means for receiving an input signal, an error signal and a noise signal, and outputting a correlation value that a product of said input signal multiplied by a sum of said error signal and said noise signal; a leakage accumulator means for averaging said correlation value, and outputting an average value; a squarer means for squaring said average value, and outputting an estimated value of power defined as a square of said average value; an exponent generator means for generating an exponent from said estimated value of power; a correlation nonlinear processor for executing a non-linear process which is a function of said estimated value of power; and a feedback circuit for updating said tap weights based upon a output signal from said correlation nonlinear processor, said feedback circuit further comprising a multiplier, a delay circuit and an adder.