finished exercise except for some parts of number 1

Assignment2_211/assignment2_3.m

@@ -0,0 +1,39 @@
+clear
+close all
+clc
+
+
+% Convolution function
+function [ Y ] = convolution( h, x )
+    Ny = length(x)+length(h)-1
+    Y = zeros(1, Ny);
+    for n = 1:Ny
+        for i = 1:length(h)
+            if (n-i+1 >= 1) && (n-i+1 <= length(x))
+                Y(n) = Y(n) + h(i) * x(n-i+1)
+            end
+        end
+    end
+end
+
+n = 0:49
+hn = [0.25, 0.5, 0.25]
+xn = cos(((2*pi)/20)*n)
+
+% Perform convolution of xn and hn
+Y = convolution(hn, xn);
+Y2 = conv(xn, hn)
+
+% Plot the results
+plot(Y);
+xlabel('Sample Index');
+ylabel('Amplitude');
+title('Convolution Result');
+grid on;
+
+% Plot Y2 on same graph
+hold on;
+plot(Y2, '--');
+legend('Custom Convolution', 'MATLAB conv Function');
+hold off;
+