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authorpriyanka2015-06-24 15:03:17 +0530
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+//ANALOG AND DIGITAL COMMUNICATION
+//BY Dr.SANJAY SHARMA
+//CHAPTER 6
+//NOISE
+clear all;
+clc;
+printf("EXAMPLE 6.10(PAGENO 305)");
+
+//given
+F_1 = 2//noise figure of first stage in dB
+A_1 = 12//gain in first stage in dB
+F_2 = 6//noise figure of second stage in dB
+A_2 = 10//gain in first second in dB
+
+
+//calculations
+F_1ratio = exp((F_1/10)*log(10));//noise figure of first stage in ratio
+F_2ratio = exp((F_2/10)*log(10));//noise figure of second stage in ratio
+A_1ratio = exp((A_1/10)*log(10));//gain of first stage in ratio
+A_2ratio = exp((A_2/10)*log(10));//gain of second stage in ratio
+F = F_1ratio + ((F_2ratio - 1)/(A_1ratio));//Overall noise figure
+F_dB = 10*log10(F);//Overall noise figure in dB
+
+//results
+printf("\n\nOverall noise figure = %.2f dB",F_dB );