CN (T+1) =CN (T) ???g???X*???E X*: complex conjugate number of input signal=Ir???j???Qr E: Ebi+j???Ebq=(Ia???Id)+j???(Qa???Qd) g: constant (scalar) CN(T): tap coefficients C1 to CN at time T CN(T+1): tap coefficients C1 to CN at time T+1 where j is an imaginary part of a complex number.