Equation Icon  ∑ 1 − iφ ∗ iφ S1,DC = 2(Aij e x + A ij e x) with {i,j | i,j ∈ {0,...,N } ∧ ωij = ωx} i∑j { −iφx} (80 ) = ℜ Aij e . ij