This a program about FFT code of digital signal processing in communication engineering,which concludes spectrum anaysis,phase anaysis and z-plane and so on.if you are a fresher,you will like it.

DFTtransform.m
fftshift_func.m
fft_func.m
FIR.m
FIR_2.m
FIR_3.m
fliter_func.m
IDFTtransform.m
ifft_func.m
IIR.m
zplane_func.m

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