1 files changed, 23 insertions, 0 deletions
diff --git a/2279/CH7/EX7.7/Ex7_7.sce b/2279/CH7/EX7.7/Ex7_7.sce
new file mode 100644
index 000000000..9e9508b5f
--- /dev/null
+++ b/2279/CH7/EX7.7/Ex7_7.sce
@@ -0,0 +1,23 @@
+//DTFS of discrete periodic signal
+clc
+clear
+close
+N=2//asume N=2
+n=-2*N:2*N
+for i=1:length(n)
+    if modulo(n(i),N)==0 then
+    x(i)=1;
+else
+    x(i)=0;
+end
+end
+subplot(2,1,1)
+plot(n,x,'.')
+xtitle("Input signal x[n]","n","x[n]");
+k=-5:5;
+for i=1:length(k)
+    ak(i)=1/N;
+end
+subplot(2,1,2)
+plot(k,ak,'.')
+xtitle("Frequency spectrum","k","ak")