Fig. 1

Block diagram of second order blind identification with a reference algorithm to analyze single trial SEP. The framework is presented with input signal, reference signal, output signal and the main processing part of the second order blind identification with a reference algorithm. When the input signal is X (t), the learning demixing matrix A must be adjusted by both second order blind identification and the closeness constraint relative to the output y (t) according to reference signals R (t), Until y (t) = y ^*is the constraint condition of closeness between the estimated output y (t) and the reference R (t), the optimal output y(t) = y* can be obtained