initial commit / add all books

3 files changed, 65 insertions, 0 deletions

diff --git a/40/CH5/EX5.3e/Exa_5_3e.sce b/40/CH5/EX5.3e/Exa_5_3e.sce
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index 000000000..bc0ba497e
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+//DTFT of x[n]=n*(a)^n*u[n]

+clear;

+clc;close;

+//DTS signal

+a1=0.5;

+a2=-0.5;

+max_limit=10;

+for n=0:max_limit-1

+  x1(n+1)=4*(a1^(n+3));

+  x2(n+1)=4*(a2^(n+3));

+end

+n=0:max_limit-1;

+//discrete time fourier transform

+wmax=2*%pi;

+K=4;

+k=0:(K/1000):K;

+W=k*wmax/K;

+x1=x1';

+x2=x2';

+XW1=x1*exp(%i*n'*W);

+XW2=x2*exp(%i*n'*W);

+XW1_Mag=abs(XW1);

+XW2_Mag=abs(XW2);

+W=[-mtlb_fliplr(W),W(2:1001)];//omega form

+XW1_Mag=[mtlb_fliplr(XW1_Mag),XW1_Mag(2:1001)];

+XW2_Mag=[mtlb_fliplr(XW2_Mag),XW2_Mag(2:1001)];

+[XW1_phase,db]=phasemag(XW1);

+[XW2_phase,db]=phasemag(XW2);

+XW1_phase=[-mtlb_fliplr(XW1_phase),XW1_phase(2:1001)];

+XW2_phase=[-mtlb_fliplr(XW2_phase),XW2_phase(2:1001)];

+

+//plot for a>0

+figure

+subplot(3,1,1);

+plot2d3('gnn',n,x1)

+xtitle('Discrete time sequencex[n] a>0')

+subplot(3,1,2);

+a=gca();

+a.y_location="origin";

+a.x_location="origin";

+plot2d3(W,XW1_Mag);

+title('magnitude Response abs(exp(jw))')

+subplot(3,1,3);

+a=gca();

+a.y_location="origin";

+a.x_location="origin";

+plot2d(W,XW1_phase);

+title('magnitude Response abs(exp(jw))')

+//plot for a<0

+figure

+subplot(3,1,1);

+plot2d3('gnn',n,x2);

+xtitle('Discrete Time sequence x[n] for a>0')

+subplot(3,1,2);

+a=gca();

+a.y_location="origin";

+a.x_location="origin";

+plot2d(W,XW2_Mag);

+title('Magnitude Response abs(X(jw))')

+subplot(3,1,3);

+a=gca();

+a.y_location="origin";

+a.x_location="origin";

+plot2d(W,XW2_phase);

+title('phase Response<(X(jw))')

diff --git a/40/CH5/EX5.3e/Exa_5_3e_0.jpg b/40/CH5/EX5.3e/Exa_5_3e_0.jpg
new file mode 100755
index 000000000..9b58b117d
--- /dev/null
+++ b/40/CH5/EX5.3e/Exa_5_3e_0.jpg
diff --git a/40/CH5/EX5.3e/Exa_5_3e_1.jpg b/40/CH5/EX5.3e/Exa_5_3e_1.jpg
new file mode 100755
index 000000000..ec73f77a9
--- /dev/null
+++ b/40/CH5/EX5.3e/Exa_5_3e_1.jpg