initial commit / add all books

1 files changed, 32 insertions, 0 deletions

diff --git a/40/CH10/EX10.5b/Exa_10_5b.sce b/40/CH10/EX10.5b/Exa_10_5b.sce
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+//Fir high pass filter design by frequency sampling

+z=%z;

+N=10;

+magHk=[0 0 0 1 1 1 1 1 0 0];

+k=[0:5 -4:-1:-1];

+fik=(-%pi*k'*(N-1)/N)+(0.5*%pi);

+for i=1:length(fik)

+    H1k(i)=magHk(i)*exp(%i*fik(i));

+end

+H1n=(dft(H1k,1));

+H2k=H1k;

+H2k(3)=0.5*%e^(-%i*1.3*%pi);

+H2k(9)=0.5*%e^(%i*1.3*%pi);

+H2n=(dft(H2k,1));

+H1Z=0;H2Z=0;

+for i=1:length(H1n)

+    H1Z=H1Z+H1n(i)*z^(-i); 

+end

+for i=1:length(H2n)

+    H2Z=H2Z+H2n(i)*z^(-i); 

+end

+F=0:0.01:1;

+F1=0:0.1:0.9;

+H1F=abs(horner(H1Z,exp(%i*2*%pi*F')));

+H2F=abs(horner(H2Z,exp(%i*2*%pi*F')));

+a=gca();

+plot2d(F1,magHk);

+plot2d(F,H2F);

+plot2d(F,H1F);

+xlabel('Digital Frequency F');

+ylabel('magnitude');

+xtitle('Low pass filter using frequency sampling');
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