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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 /2414/CH17/EX17.9 | |
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initial commit / add all books
Diffstat (limited to '2414/CH17/EX17.9')
| -rwxr-xr-x | 2414/CH17/EX17.9/Ex17_9.sce | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/2414/CH17/EX17.9/Ex17_9.sce b/2414/CH17/EX17.9/Ex17_9.sce new file mode 100755 index 000000000..897b37a0a --- /dev/null +++ b/2414/CH17/EX17.9/Ex17_9.sce @@ -0,0 +1,29 @@ +clc;
+close();
+clear();
+//page no 557
+//prob no. 17.9
+
+EIRP_dBW=47.8; //dBW
+l=91-90; //Difference in longitude
+L=32 //Latitude of New York
+d_km=35.786*10^3*sqrt(1+0.42*(1-cos(L*%pi/180)*cos(l*%pi/180)));
+mprintf('The distance is %.0f km \n',d_km)
+
+f=3.9 //downlink frequency in GHz
+alfa1_dB=20*log10(f)+20*log10(d_km)+92.44; //Path loss
+mprintf('The path loss is %.2f dB \n',alfa1_dB)
+
+F=1.778 //absolute noise figure
+Te=(F-1)*290; //Noise temperature
+mprintf('The Noise temperature of satellite reciever is %.2f K \n',Te)
+Ti=150; //input noise temperature in K
+Tsys=Ti+Te
+mprintf('The system temperature of satellite reciever is %.2f K \n',Tsys)
+G_dB=42 //satellite reciever antwnna gain
+GT=G_dB-10*log10(Tsys); //G/T ratio in dB
+mprintf('The G/T ratio for satellite reciever is %.2f dB/K \n',GT)
+B=36*10^6 ;// Bandwidth in Hz
+L_misc=1 //atmospheric loss
+CN=EIRP_dBW-alfa1_dB+GT+228.6-10*log10(B)-L_misc; //C/N in dB
+mprintf('The carrier power to noise ratio at the satellite reciever is %.1f dB \n',CN)
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