uploaded all materials

lessons/lesson07/bandstop2500.m

@@ -0,0 +1,35 @@
+function Hd = bandstop2500
+%BANDSTOP2500 Returns a discrete-time filter object.
+
+% MATLAB Code
+% Generated by MATLAB(R) 9.9 and Signal Processing Toolbox 8.5.
+% Generated on: 24-Mar-2021 17:32:55
+
+% Elliptic Bandstop filter designed using FDESIGN.BANDSTOP.
+
+% All frequency values are in Hz.
+Fs = 8192;  % Sampling Frequency
+
+Fpass1 = 2000;    % First Passband Frequency
+Fstop1 = 2300;    % First Stopband Frequency
+Fstop2 = 2700;    % Second Stopband Frequency
+Fpass2 = 3000;    % Second Passband Frequency
+Apass1 = 0.5;     % First Passband Ripple (dB)
+Astop  = 60;      % Stopband Attenuation (dB)
+Apass2 = 1;       % Second Passband Ripple (dB)
+match  = 'both';  % Band to match exactly
+
+% Construct an FDESIGN object and call its ELLIP method.
+h  = fdesign.bandstop(Fpass1, Fstop1, Fstop2, Fpass2, Apass1, Astop, ...
+                      Apass2, Fs);
+Hd = design(h, 'ellip', 'MatchExactly', match);
+
+% Get the transfer function values.
+[b, a] = tf(Hd);
+
+% Convert to a singleton filter.
+Hd = dfilt.df2(b, a);
+
+
+
+% [EOF]