The above equation is effectively 'inverted' as follows. Blind source separation separates the set of mixed signals, x ( t ) , through the determination of an 'unmixing' matrix, B = [ B i j ] ∈ ∈ R n × × m , to 'recover' an approximation of the original signals, y ( t ) = ( y 1 ( t ) , … … , y n ( t ) ) T .