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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /40/CH8/EX8.24 | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '40/CH8/EX8.24')
| -rwxr-xr-x | 40/CH8/EX8.24/Exa_8_24.sce | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/40/CH8/EX8.24/Exa_8_24.sce b/40/CH8/EX8.24/Exa_8_24.sce new file mode 100755 index 000000000..5ad54e146 --- /dev/null +++ b/40/CH8/EX8.24/Exa_8_24.sce @@ -0,0 +1,24 @@ +//The importance of Periodic extension
+//(a)For M=3
+x=[1 2 1];
+XDFT=dft(x,-1)
+w=exp(-%i*2*%pi/3);
+for i=1:3
+ for j=1:3
+ WN(i,j)=w^((i-1)*(j-1));
+ end
+end
+WI=WN';
+xn=1/3*WI*XDFT
+//The result is periodic with M=3 & 1 period equals x[n]
+//(b)For M=4
+y=[1 2 1 0];
+YDFT=dft(y,-1)
+w=exp(-%i*%pi/2);
+for i=1:4
+ for j=1:4
+ WN(i,j)=w^((i-1)*(j-1));
+ end
+end
+WI=WN';
+yn=1/4*WI*YDFT
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