initial commit / add all books

2 files changed, 59 insertions, 0 deletions

diff --git a/881/CH25/EX25.2/exa25_2.sce b/881/CH25/EX25.2/exa25_2.sce
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index 000000000..9e494a490
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+++ b/881/CH25/EX25.2/exa25_2.sce
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+clc;
+//Example 25.2
+//Page No 1018
+
+
+
+//solution
+
+Pt=1000;
+fb=50*10^6;
+
+Tb=(1/fb);
+
+disp('s',Tb*10^1,"Tb = ");
+
+Eb=Pt*Tb;
+
+disp('J',Eb,"Eb = ");
+
+disp("Expressed as a log with 1 Joule as the reference, ");
+
+eb=10*log10(Eb);
+
+disp('dBJ',eb,"Eb = ")
+
+disp("It is common to express Pt in dBW and Eb in dBW/bps. Thus, ");
+
+pt=10*log10(Pt);
+
+disp('dBW',pt,"Pt = ");
+
+disp('dBW/bps',round(eb),"Eb = ");
diff --git a/881/CH25/EX25.5/exa25_5.sce b/881/CH25/EX25.5/exa25_5.sce
new file mode 100755
index 000000000..3bfc318c6
--- /dev/null
+++ b/881/CH25/EX25.5/exa25_5.sce
@@ -0,0 +1,27 @@
+clc;
+//Example 25.5
+//Page No 1022
+
+
+
+//solution:
+
+B=10*10^6;
+N=276*10^-16;
+K=1.38*10^-23;
+
+disp("Substituting into equation 25-12, we have");
+
+N0=(N/B);
+
+disp('W/Hz',N0,"N0 = ");
+
+n0=10*log10(N0);
+
+disp('dBW/Hz',n0,"N0 = ");
+
+disp("Rearranging equation 25-12 and solving we get, ");
+
+Te=(N0/K);
+
+disp('K/cycle',Te,"Te = ");