Figure 2. Structure of digital filter bankDigital filter banks can decompose the signal spectruminto several adjacent band signals or combine severalsignals into a new signal using low-pass, band-pass andhigh-pass filters. The decomposition process is completedin the analysis part of the filter bank, and the cache is usedto assist the communication process [17], while thesynthesis process is completed in the synthesis part of thefilter bank. The uniform M-channel filter bank iscomposed of low-pass, band-pass and high-pass filters.The bandwidth of each filter is equal, and the centerfrequency points are evenly distributed.