Figure 1 shows the system diagram of the mobile and wireless brain-computer interface.
The front-end unit integrates (1) clip-on electrode holders for dry MEMS or
commercially available wet EEG electrodes, (2) a DAQ unit, and (3) wirelesstransmission
circuitry, into a quickly and easily donned and doffed headband that can
acquire and transmit EEG signals from up to eight channels. The back-end unit integrates
a wireless signal receiver and on-line DSP. EEG signals are first acquired by
dry MEMS or commercially available electrodes, amplified by the preamplifier, converted
to digital signals, and then wirelessly transmitted to the data receiver. The DSP
unit processes the EEG data and displays the results. The raw EEG data can also be
wirelessly transmitted to a remote PC for further offline analysis and/or database
collection.