ADC multiplexing and EEG phase
Hi!
Let me add small comment about some shortcomings of cost-efficient schemes for EEG advanced processing.
According to it's design both EEG amplifiers utilize multiplexing scheme in multiple channels ADC signal processing. It's not bad, until you are going to exploit fine phase metrics of EEG signals like coherence, phase reset, effective connectivity etc.
Due to multiplexing trick, inevitable phase slewing will occur with following distortion of phase between channels.
It is not good for coherence based BCI protocols.
Best regards,
Alexei
Let me add small comment about some shortcomings of cost-efficient schemes for EEG advanced processing.
According to it's design both EEG amplifiers utilize multiplexing scheme in multiple channels ADC signal processing. It's not bad, until you are going to exploit fine phase metrics of EEG signals like coherence, phase reset, effective connectivity etc.
Due to multiplexing trick, inevitable phase slewing will occur with following distortion of phase between channels.
It is not good for coherence based BCI protocols.
Best regards,
Alexei
Comments
Dear William, sorry for being too impulsive and inattentive!
I just missed this important thread!
Thanks a lot for this reference and I will read all this material very carefully and would add some considerations.
Thanks again,
Best,
Alexei