initial commit / add all books

1 files changed, 25 insertions, 0 deletions

diff --git a/2409/CH12/EX12.19/Ex12_19.sce b/2409/CH12/EX12.19/Ex12_19.sce
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+
+//Variable declaration
+//For uplink
+Ps=-67.5   //Saturation flux density(dB)
+A0=-37     //Antenna aperture at 6GHz(dB)
+IBO=-11    //Input Backoff(dB)
+GTRs=-11.6 //Satellite saturation G/T (dB)
+k=-228.6   //Value of k(dB)
+
+//For Downlink
+EIRP=26.6  //Satellite EIRP(dB)
+OBO=-6     //output Backoff(dB)
+FSL=-196.7 //Free Space loss(dB)
+GTRe=40.7  //Earth station G/T(dB)
+
+//Calculation
+CNRu=Ps+A0+IBO+GTRs-k     //Carrier to noise ratio for uplink(dB)
+CNRd=EIRP+OBO+FSL+GTRe-k//Carrier to noise ratio for downlink(dB)
+N0CR=10**(-CNRu/10)+10**(-CNRd/10)  //Noise to carrier ratio
+CNR=-10*log10(N0CR)   //Combined c/N0 ratio(dBHz)
+
+//results
+printf("The Carrier to noise ratio for uplink is %.2f dB",CNRu)
+printf("The Carrier to noise ratio for downlink is %.2f dB",CNRd)
+printf("The combined carrier to noise ratio is %.2f dBHz",CNR)