1 files changed, 36 insertions, 0 deletions
diff --git a/2279/CH7/EX7.26/Ex7_26.sce b/2279/CH7/EX7.26/Ex7_26.sce
new file mode 100644
index 000000000..6aa35df4b
--- /dev/null
+++ b/2279/CH7/EX7.26/Ex7_26.sce
@@ -0,0 +1,36 @@
+//Discrete Time Fourier Transform of discrete sequence
+//x[n]= 1, n=2
+clear;
+clc;
+close;
+a1 = 1/8;
+max_limit = 10;
+for n = 0:max_limit-1
+    if n==2 then
+    x1(n+1) = 1;
+else
+    x1(n+1) = 0;
+end  
+end
+n = 0:max_limit-1;
+Wmax = 2*%pi;       
+K = 4;
+k = 0:(K/1000):K;
+W = k*Wmax/K;
+x1 = x1';
+XW1 = x1* exp(-sqrt(-1)*n'*W);
+XW1_Mag = abs(XW1);
+W = [-mtlb_fliplr(W), W(2:1001)]; // Omega from -Wmax to Wmax
+XW1_Mag = [mtlb_fliplr(XW1_Mag), XW1_Mag(2:1001)];
+[XW1_Phase,db] = phasemag(XW1);
+XW1_Phase = [-mtlb_fliplr(XW1_Phase),XW1_Phase(2:1001)];
+subplot(3,1,1);
+plot2d3('gnn',n,x1);
+xtitle('Discrete Time Sequence x[n]')
+subplot(3,1,2);
+plot2d(W,XW1_Mag);
+title('Magnitude Response abs(X(jW))')
+subplot(3,1,3);
+plot2d(W,XW1_Phase);
+title('Phase Response <(X(jW))')
+