Different communication systems will have different curve of Eb/No vs. BER
Two ways to compare– vertical line and horizontal line:
1. horizontal line:
(for a given BER) some system needs less energy, which is good.
2. vertical line:
(for the same amount of Eb/No) some system provides less BER, which is good.
Furthermore, based on the graph, transmit power can be [...]
Q: What is Eb/N0?
Eb/No is S/N (Signal to Noise ratio) divided by spectral efficiency.
“SNR per bit”
Q: Why is Eb/N0 important in digital communication?
Motivation:
- analog waveform is a power signal (infinite energy, finite average power)
- digital waveform is an energy signal (zero average power, non-zero finite energy) since a waveform is transmitted only during each symbol [...]
