(1) Design a digital low-pass filter. Design specifications are as follows: pass-band attenuation range of people within a range greater than 1dB stopband attenuation greater than 15dB (2) the preparation of calculation and design of digital filter amplitude characteristics and phase characteristics of processes and experimental verification (3) the preparation of implementation of the digital filter program and simulate digital filtering ① were designed to meet the pass-band filter, filter belt, stop-band frequency characteristics of the sine wave through the filter, verify the filter performance. ② change the sine sampling time, verify that the number of analog low-pass filter cutoff frequency is the sampling function of time.

work2\afd_buttap.m
.....\buttap_o.asv
.....\buttap_o.m
.....\butterworth.asv
.....\butterworth.fig
.....\butterworth.m
.....\Desktop_1.ini
.....\dir2cas.m
.....\dsp.doc
.....\fft.asv
.....\fft.fig
.....\fft.m
.....\freqs_m.m
.....\freqz_m.m
.....\Hanning\freqz_m.m
.....\.......\Hanning.asv
.....\.......\Hanning.fig
.....\.......\Hanning.m
.....\.......\Hanning1.m
.....\.......\ideal_lp.m
.....\hs_err_pid3240.log
.....\impseq.m
.....\sdir2cas.asv
.....\sdir2cas.m
.....\step.m
.....\stepseq.m
.....\数字信号处理实验报告.doc
.....\Hanning
work2

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