Patent ID: 7693291
Filing Date: 2010-04-06
Classification: H04M

Abstract:
1. A adaptive-filter-implemented method for adaptively filtering a signal comprising multiple echo responses, wherein each of said multiple echo responses corresponds to a different reception channel, said method comprising the steps of: (a) generating, by the adaptive filter, an estimate of an echo response corresponding to each of said multiple echo responses; (b) generating, by the adaptive filter, a sum of said estimates; and (c) generating, by the adaptive filter, an error signal representing a difference between said signal and said sum of said estimates, wherein: said estimates are generated using a frequency-domain recursive least-squares algorithm in which at least one of said estimates corresponding to a first reception channel is based on (i) an impulse response corresponding to the first reception channel and (ii) one or more other impulse responses corresponding to one or more other reception channels.