initial commit / add all books

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diff --git a/851/CH7/EX7.41/Figure7_41.sce b/851/CH7/EX7.41/Figure7_41.sce
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+//clear//

+//Caption:Matched Filter output of rectangular pulse

+//Figure7.41

+//Matched Filter Output

+clear;

+clc;

+T =4;

+a =2;

+t = 0:T;

+g = 2*ones(1,T+1);

+h  =abs(convol(g,g));

+for i = 1:length(h)

+  if(h(i)<0.01)

+    h(i) =0;

+  end

+end

+h = h-T;

+t1 = 0:length(h)-1;

+figure

+a =gca();

+a.data_bounds = [0,0;6,4];

+plot2d(t,g,5)

+xlabel('t--->')

+ylabel('g(t)---->')

+title('Rectangular pulse duration T = 4, a =2')

+figure

+plot2d(t1,h,6)

+xlabel('t--->')

+ylabel('Matched Filter output')

+title('Output of filter matched to rectangular pulse g(t)')