LAB4\afd_elip.m ....\conv_m.m ....\dft.m ....\expseq.m ....\freqs_m.m ....\freqz_m.m ....\Hr_Type1.m ....\Hr_Type2.m ....\ideal_lp.m ....\idft.m ....\impseq.m ....\lab4.m ....\randnseq.m ....\rectseq.m ....\sdir2cas.m ....\sigadd.m ....\sigfold.m ....\sigshift.m ....\u_elipap.m ....\xcorr_m.m LAB4