Description: A) Design of a low-pass IIR filter, it is to deal with a 30kHz square wave signal to obtain a clean 1kHz sine wave signal, the sampling frequency is set to 30kHz 2) direct implementation structure II, class II and parallel implementation structure associated implementation structure to be filtered 3) in the filter, I assume that the input filter coefficients and filter the results are quantified, retain two decimal places
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DSP\yxzcxy.m
DSP
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