initial commit / add all books

1 files changed, 37 insertions, 0 deletions

diff --git a/851/CH7/EX7.3/Table7_3.sce b/851/CH7/EX7.3/Table7_3.sce
new file mode 100755
index 000000000..ec59df5cf
--- /dev/null
+++ b/851/CH7/EX7.3/Table7_3.sce
@@ -0,0 +1,37 @@
+//clear//

+//Caption:Illustrating the generation of DPSK signal

+//Table7.3 Generation of Differential Phase shift keying signal

+clc;

+bk = [1,0,0,1,0,0,1,1];//input digital sequence

+for i = 1:length(bk)

+  if(bk(i)==1)

+    bk_not(i) =~1;

+  else

+    bk_not(i)= 1;

+  end

+end

+dk_1(1) = 1&bk(1);  //initial value of differential encoded sequence

+dk_1_not(1)=0&bk_not(1);

+dk(1) = xor(dk_1(1),dk_1_not(1))//first bit of dpsk encoder

+for i=2:length(bk)

+  dk_1(i) = dk(i-1);

+  dk_1_not(i) = ~dk(i-1);

+  dk(i) = xor((dk_1(i)&bk(i)),(dk_1_not(i)&bk_not(i)));

+end

+for i =1:length(dk)

+  if(dk(i)==1)

+    dk_radians(i)=0;

+  elseif(dk(i)==0)

+    dk_radians(i)=%pi;

+  end

+end

+disp('Table 7.3 Illustrating the Generation of DPSK Signal')

+disp('_____________________________________________________')

+disp(bk,'(bk)')

+bk_not = bk_not';

+disp(bk_not,'(bk_not)')

+dk = dk';

+disp(dk,'Differentially encoded sequence (dk)')

+dk_radians = dk_radians';

+disp(dk_radians,'Transmitted phase in radians')

+disp('_____________________________________________________')