If the r-th band filter is calculated from a singleprototypefilter( )h n,thenHiscalledDiscreteFourierTransform (DFT) filter bank. If the multi-phase decomposition of filter( )rhnand input signal*y is adopted, an effective realization of the filter bank ofR channels can be obtained. Since each band-pass filter isprecisely sampled, the decomposition of R multi-phasesignals is adopted. The relevant calculation formula is asfollows: