Then,
the source activities S(t) of all source components were computed
fromthe data matrix D(t) using an inverse regularized by the estimated
noise covariance matrix [S(t)=R ∙ LT ∙ (L ∙ R ∙ LT+CN)−1 ∙ D(t)]where L
is the leadfield matrix of the distributed regional source model, CN denotes
the noise correlation matrix in sensor space, and R is a weighting
matrix in source space.