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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /2606/CH8/EX8.15/ex8_15.sce | |
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Diffstat (limited to '2606/CH8/EX8.15/ex8_15.sce')
| -rwxr-xr-x | 2606/CH8/EX8.15/ex8_15.sce | 105 |
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diff --git a/2606/CH8/EX8.15/ex8_15.sce b/2606/CH8/EX8.15/ex8_15.sce new file mode 100755 index 000000000..741fad04f --- /dev/null +++ b/2606/CH8/EX8.15/ex8_15.sce @@ -0,0 +1,105 @@ +//Page Number: 8.15
+//Example 8.15
+clc;
+
+//Given Noise figure
+NF=5; //dB
+F=(10^(NF/10));
+
+Ta=1050; //Kelvin
+
+//(a) Overall Noise Figure
+T=20; // degree Celsius
+To=T+273; //Kelvin
+
+//Effective Noise temperature
+Te=((F-1)*To);
+disp('K',Te,'Effective Noise temperature');
+
+//Overall effective Noise Temperature
+TIN=Ta+Te;
+disp('K',TIN,'Overall Effective Noise temperature');
+
+//Overall noise figure
+ONF=(1+(TIN/To));
+ONFdB=(10*(log10(ONF))); //dB
+
+disp('dB',ONFdB,'Overall Noise Figure:');
+
+
+//(b)Input Signal Power
+//Given Output SNR
+Outsnr=6; //dB
+Osnr=(10^(Outsnr/10));
+
+Isnr=ONF*Osnr;
+
+//Input Noise Power=KTB
+K=1.38D-23;
+B=50000;
+Pni=K*TIN*B; //W
+
+//Input signal Power
+Psi=Isnr*Pni; //W
+PsidBW=(10*(log10(Psi/1))); //dBW
+disp('dBW',PsidBW,'Input signal Power:');
+
+
+//(c)Minimum detectable signal Vmin
+//Given
+Osnr=10; //dB
+R=50; //Ohms
+
+FF1=3; //dB
+F1=(10^(FF1/10));
+
+FF2=5; //dB
+F2=(10^(FF2/10));
+
+GG1=7;
+G1=(10^(GG1/10));
+//Using F=F1+((F2-1)/G1)
+
+Fa=F1+((F2-1)/G1);
+
+Fa1=(10*(log10(Fa)));
+
+//Equivalent Noise Tempertaure
+Te1=((Fa-1)*To);
+disp('K',Te1,'Equivalent Noise temperature:');
+
+//Overall effective Noise Temperature
+TIN1=Ta+Te1;
+disp('K',TIN1,'Effective Noise temperature:');
+
+//Input Noise Power=KTB
+Pni1=K*TIN1*B; //W
+
+//Overall noise figure
+ONF1=(1+(TIN1/To));
+ONFdB1=(10*(log10(ONF)));
+disp('W',ONFdB1,'Overall Noise Figure:');
+
+//Input SNR
+Isnr1=ONF1*Osnr;
+
+//Input signal Power
+Psi1=Isnr1*Pni; //W
+disp('W',Psi1,'Input Signal Power:');
+
+//Now as Vmin^2/R=Psi1
+//Therefore
+Vmin=sqrt(Psi1*R);
+disp('V',Vmin,'Minimum detectable signal Vmin:');
+
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