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+clc;
+// page no 136
+// prob no 4_12_1
+//As shown in fig 4.12.1
+//Three identical links are given with for 1 link is SNR=60 dB
+SNR1=60;
+l=3;
+//Determination of output signal to noise ratio
+SNR=(SNR1)-10*log10(l);
+disp('dB',SNR,'The value of output signal to noise ratio is ');
+\ No newline at end of file