Channel Projection-Based CCA Target Identification Method for an SSVEP-Based BCI System of Quadrotor Helicopter Control

Figure 7

The process of the proposed CP-CCA (channel projection-based CCA) for SSVEP target recognition. For the same target frequency , the different trials of recorded EEG data are dispersed and then reorganized according to the different channels, , and . The optimal reference signals of different channels ( and ) under certain stimulus frequency are obtained by the CCA between the channel-based EEG data and the sine-cosine signals . The SSVEP target frequency of a new test data of single trial is recognized according to the maximum value of the sum of .