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Diffstat (limited to '3415/CH11/EX11.7/Ex11_7.sce')
| -rw-r--r-- | 3415/CH11/EX11.7/Ex11_7.sce | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/3415/CH11/EX11.7/Ex11_7.sce b/3415/CH11/EX11.7/Ex11_7.sce new file mode 100644 index 000000000..f65dd3c48 --- /dev/null +++ b/3415/CH11/EX11.7/Ex11_7.sce @@ -0,0 +1,19 @@ +//fiber optic communications by joseph c. palais
+//example 11.7
+//OS=Windows XP sp3
+clc
+clear all
+//given
+Pi=2e-12//signal power in W
+K=1.38e-23//temperature in kelvin
+deltaf=1e7//bandwidth in Hz
+TA=300//Ambient temperature in Kelvin
+T=454//noise temperature in Kelvin
+PNT=1.66*10^-11//thermal noise power in W at 300K
+G=10//power gain of amplifier in dB
+//to find
+Te=T+TA//equivalent noise temperature in Kelvin
+PN=4*K*Te*deltaf//Noise power in W
+SNR=Pi/PN//Signal to noise ratio
+SNRdb=10*log10(SNR)//Signal to noise ratio in dB
+mprintf("Output Signal to noise ratio=%fdB",SNRdb)
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