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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 /116/CH6 | |
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Diffstat (limited to '116/CH6')
| -rwxr-xr-x | 116/CH6/EX6.4/exa6_4.sce | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/116/CH6/EX6.4/exa6_4.sce b/116/CH6/EX6.4/exa6_4.sce new file mode 100755 index 000000000..314e151dd --- /dev/null +++ b/116/CH6/EX6.4/exa6_4.sce @@ -0,0 +1,35 @@ +
+//Caption: Program to determine system gain of 10Mbps, 2Ghz digital microwave repeater using 4 PSK modulation
+
+//Example 6.4
+
+//Page 325
+
+//Refer to figure 6.17 on page 300
+
+disp('From figure, Eb/N0 for 4 psk modulation can be determined 10.7 dB.')
+
+//Using equation 3.24 from Appendix C
+
+disp('SNR detector is 3dB higher than Eb/N0, therefore')
+
+snr=13.7//SNR=13.7dB
+
+disp('Since 4 PSK modulation provides 2bps/Hz, the sampling rate is 5 MHz, which is Nqyuist rate, therefore')
+
+a1=10*log10(125000000000000)
+
+a2=10*log10(1.3)
+
+A0=a1-13.7-7-3-a2
+
+disp('At a carrier frequency of 2GHz, the wavelength is')
+
+(3*10^8)/(2*10^9)
+
+FM=116+60+20*log10(0.15)-5-20*log10(4*%pi*5*10^4)//Fade Margin can be found by Equation 6.31
+
+//Result
+//A0 = 116dB
+//wavelength = 0.15 m
+//Fade Margin = 38.5 dB
\ No newline at end of file |