Method of Identifying an Unknown System with a Band-Splitting Adaptive Filter and a Device Thereof

摘要

An object of the present invention is to offer an art of identifying an unknown system to provide less computation and a shorter convergence time by controlling the number of taps of the adaptive filter corresponding to each subband. The configuration of the present invention comprises: a step of splitting an input signal to an unknown system and generating a plurality of subband signals; a step of splitting an output signal from said unknown system and generating a plurality of subband reference signals; a step of filtering said subband signals with a plurality of adaptive filters and generating a plurality of replica signals corresponding to said subband reference signals; a step of generating a plurality of subband error signals based on differences between said subband reference signals and said replica signals; a step of updating coefficient values of said adaptive filters using said subband error signals; and a step of adaptively controlling the number of taps of said adaptive filters using data on said adaptive filters.