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adjacentlink / emane

Distributed wireless network emulation framework
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Meaning of noisemode wrt different radio models #233

Closed vivianchiong closed 1 year ago

vivianchiong commented 1 year ago

When I had noisemode set to all for IEEE 802.11abg radio model, I got an error running the scenario that said I can only use none and outofband for the IEEE 802.11abg model.

Why is this the case? What exactly is noisemode configuring for different radio models?

I don't come from an RF background so I apologize if this question is out of scope. Please let me know if there is a wiki page or link that would help give some background on this parameter instead.

Thank you so much!

sgalgano commented 1 year ago

noisemode controls how the physical layer records the receive energy of over-the-air frames. Radio models have different degrees of complexity and mechanisms for handling in-band noise. In emane, the term in-band is used to refer to spectrum energy from the same waveform and out-of-band (outofband) refers to energy from different waveforms. The IEEE 802.11abg radio model uses a statistical model for in-band noise, so the physical layer is configured to only track energy (noise) from other waveforms (out-of-band). Setting noisemode to none disables noise processing in the physical layer.

vivianchiong commented 1 year ago

That makes sense. Thank you! I'll close this out.