From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 40/CH8/EX8.20/Exa_8_20.sce | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100755 40/CH8/EX8.20/Exa_8_20.sce

(limited to '40/CH8/EX8.20')

diff --git a/40/CH8/EX8.20/Exa_8_20.sce b/40/CH8/EX8.20/Exa_8_20.sce
new file mode 100755
index 000000000..a87b49079
--- /dev/null
+++ b/40/CH8/EX8.20/Exa_8_20.sce
@@ -0,0 +1,9 @@
+//A four point decimation-in-frequency FFT algorithm
+x=[1 2 1 0];
+w=-%i;
+xdft(1)=x(1)+x(3)+x(2)+x(4);
+xdft(2)=x(1)-x(3)+w*(x(2)-x(4));
+xdft(3)=x(1)+x(3)-x(2)-x(4);
+xdft(4)=x(1)-x(3)-w*(x(2)-x(4));
+XDFT=dft(x,-1);
+xdft,XDFT
\ No newline at end of file
-- 
cgit