[ath9k-devel] ath9k: spectral scan -vs- channel state information

Adrian Chadd <adrian <at> freebsd.org> writes:


> 
> Well, there's magnitude and phase, and it gives you the values for
> each. You have to run it through math to get a power level for each
> bucket.
> 
> https://wiki.freebsd.org/dev/ath_hal%284%29/SpectralScan
> 
> You don't get separate readings for I and Q in spectral scan data.
> 
> -adrian
> 

I'm confused. You say that the spectral scan only gives the magnitude of the
I and Q values combined, not separate. But then you say that "there's
magnitude and phase, and it gives you the values for each." Doesn't that
mean that you do get both the I and Q values (after converting from
magnitude/phase values)?

Also, is this the same info that's logged in the "Atheros CSI Tool"
(https://github.com/xieyaxiongfly/Atheros-CSI-Tool)? Or is the spectral scan
data completely different?