Uniform cosine modulated filter banks - a new cascade method based on window functions

摘要

In this study, a new cosine modulated filter bank design is proposed by using window functions. The prototype filter of the filter bank is designed with cascade use of the Gaussian window function and Kaiser window function in the proposed method. The filter bank designed using proposed prototype filter and discrete cosine transform is analyzed for four different number of channels and different filter lengths. The proposed method is compared with the designs using Kaiser and Gaussian window functions. According to the results, it is seen that the proposed method gave better results than the others in terms of Peak Reconstruction Error (PRE). It is shown that the proposed prototype filter has better stop band attenuation values than the compared ones in the literature. At the end of the study, the application of two filter banks with different channel numbers for the proposed method in the ECG signal is shown.