Patent ID: 6426979
Filing Date: 2002-07-30
Classification: H04B

Abstract:
A method for controlling an adaptive balance filter, comprising:performing a correlation function upon a first input signal, said first input signal being a signal from a far-end location of a communication line, with a second input signal, said second input signal being an echo signal resulting from said signal from said far-end location; calculating a value of said correlation; determining an error threshold value; determining a correlation threshold value; determining whether a third input signal, said third input signal being a signal from a near-end location of said communication line, is an error signal or an actual communication signal; determining whether to perform adaptive filtering upon said third input signal, based upon said determination of whether said third input signal is an error or an actual communication signal; determining whether said value of correlation exceeds said error threshold value; determining whether said value of correlation exceeds said correlation threshold value; and adjusting an adaptive balance filter responsive to said calculation of said value of correlation based upon said determination whether said value of correlation exceeds said error threshold value and said determination whether said value of correlation exceeds said correlation threshold value.