finished exercise

Assignment5_211/assignment5.2.m

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+clear; close all; clc;
+
+n = 0:599;   % 3 periods (3 × 200 samples)
+
+x = sin(2*pi*0.005*n) ...
+    + (1/3)*sin(2*pi*0.005*3*n) ...
+    + (1/5)*sin(2*pi*0.005*5*n) ...
+    + (1/7)*sin(2*pi*0.005*7*n);
+
+stem(n,x)
+grid on
+xlabel('n')
+ylabel('x[n]')
+title('Signal over 3 periods')
+
+load("Filter_coefficients.mat","-mat")
+
+y_FIR = filter(b1,a1,x);
+y_IIR = filter(b2,a2,x);
+
+figure
+
+plot(n,x,'y','LineWidth',1.5)
+hold on
+
+plot(n,y_FIR,'b')
+plot(n,y_IIR,'r')
+
+legend('Original','FIR','IIR')
+grid on
+title('Comparison of Signals')
+
+figure
+
+subplot(2,1,1)
+freqz(b1,a1)
+title('FIR Frequency Response')
+
+figure
+
+subplot(2,1,2)
+freqz(b2,a2)
+title('IIR Frequency Response')