Bericht
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Kapitel 1
1.1
Simulation
The complete system is tested: Mod - Size fitting - DAC - Noise - Line1 (5m) - Scharfenberg - Line2 (5m) - ADC - Demod
1.1.1
Parameter: Carrier frequency
A parameter to determinate is the „optimal“ carrier frequency for which we have the lowest error rate. Bit error rate in % for 32 QAM 45 40 35 30 25 20 15 10 5 0
0
10
20
30 40 50 Carrier frequency in MHz
60
Abbildung 1.1: From 20 to 80 MHz As we can see for a frequency of 36 MHz the error rate is minimal.
1
70
80
Bit error rate in % 10 9 8 7 6 5 4 3 2 1 0
1
2
3
4 QAM bits
5
Abbildung 1.2: From 20 to 40 MHz
2
6
7
1.1
Simulation
The complete system is tested: Mod - Size fitting - DAC - Noise - Line1 (5m) - Scharfenberg - Line2 (5m) - ADC - Demod
1.1.1
Parameter: Carrier frequency
A parameter to determinate is the „optimal“ carrier frequency for which we have the lowest error rate. Bit error rate in % for 32 QAM 45 40 35 30 25 20 15 10 5 0
0
10
20
30 40 50 Carrier frequency in MHz
60
Abbildung 1.1: From 20 to 80 MHz As we can see for a frequency of 36 MHz the error rate is minimal.
1
70
80
Bit error rate in % 10 9 8 7 6 5 4 3 2 1 0
1
2
3
4 QAM bits
5
Abbildung 1.2: From 20 to 40 MHz
2
6
7
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