initial commit / add all books

1 files changed, 21 insertions, 0 deletions

diff --git a/40/CH8/EX8.4/Exa_8_4.sce b/40/CH8/EX8.4/Exa_8_4.sce
new file mode 100755
index 000000000..847b1bfa2
--- /dev/null
+++ b/40/CH8/EX8.4/Exa_8_4.sce
@@ -0,0 +1,21 @@
+x=[1 2 1 0];

+XDFT=dft(x,-1)

+//(a)time shift property

+y=x;

+for i=1:2

+    a=y(1);

+    for j=1:length(y)-1

+        y(j)=y(j+1);

+     end

+     y(length(y))=a;

+end

+YDFT=dft(y,-1)

+disp(YDFT,'By Time-Shift property DFT of x[n-2] is');  

+//(b)flipping property

+g=[x(1) x(length(x):-1:2)]

+GDFT=dft(g,-1)

+disp(GDFT,'By Time reversal property DFT of x[-n] is');  

+//(c)conjugation property

+p=XDFT;

+PDFT=[p(1);p(4:-1:2)];

+disp(YDFT,'BY conjugation property DFT of x*[n] is');