4 three new fast algorithms of higher order cumulant ( hoc ) based adaptive dynamic spectrum enhancer are presented . based on the advantage of the sign algorithm , a fast algorithm of foc diagonal slice sign iterative adaptive dynamic line enhancer is proposed 4提出了三種自適應(yīng)動態(tài)譜線增強(qiáng)快速算法?利用極性迭代算法可減小計算量的優(yōu)點(diǎn),提出了基于四階累積量對角切片極性迭代的自適應(yīng)動態(tài)譜線增強(qiáng)快速算法。