STRUCTURE OF DELAYLESS SUBBAND ADAPTIVE FILTER USING HADAMARD TRANSFORMATION

In this paper, we consider the selection of analysis filters used in t he delayless subband adaptive digital filter (SBADF) and propose to us e simple analysis filters to reduce the computational complexity. The coefficients of filters are determined using the components of the fir st order Hadamard matrix. Because coefficients of Hadamard matrix are either 1 or -1, we can analyze signals without multiplication. Moreove r, the conditions for convergence of the proposed method is considered . It is shown by computer simulations that the proposed method can con verge to the Wiener filter.