Structure of Delayless Subband Adaptive Filter Using Hadamard Transformation

摘要

In this paper, we consider the selection of anal- ysis filters used in the delayless subband adaptive digital filter (SBADF) and propose to use simple analysis filters to reduce the computational complexity. The coefficients of filters are deter- mined using the components of the first order Hadamard matrix. Because coefficients of Hadamard matrix are either 1 or -1, we can analyze signals without multiplication. Moreover, the con- ditions for convergence of the proposed method is considered. It is shown by computer simulations that the proposed method can converge to the Wiener filter.