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+//clear//

+//Caption:Capacity of a channel using shannon's formula

+//Example1.5

+//page 12

+clear;

+clc;

+close;

+fLow = 3*(10^6); //low frequency = 3MHz

+fHigh = 4*(10^6); //hihg frequency = 4MHz

+S_N_dB = 20; //signal-to-noise ratio 20 dB

+S_N = 10^(S_N_dB/10);

+B = fHigh - fLow;

+C = B*log2(1+S_N);

+disp(B,'Bandwidth in Hz B = ')

+disp(C,'Capacity of a channel in bits/secs C =')

+disp(S_N,'signal to noise ratio S/N = ')

+//Result

+// Bandwidth in Hz B =     1000000.  

+// Capacity of a channel in bits/secs C =    6658211.5  

+// signal to noise ratio S/N =     100.