... PAPAs.Unfortunately, because of the presence of G(t), it is verydifficult to analyze the transient performance of PAPAs. Inthissection,weproposeavariablestepsizeforPAPA. The APA can be derived from the ... Signal Processing MPNLMS algorithm is one of the fastest in the framework of proportionate adaptation. Instead of using magnitudedirectly, the logarithm of the magnitude is used as the stepgain of ... in the algorithm, see[24] and reference therein.Let us discuss the influence of an inaccurate estimate of σ2v(t) on the convergence performance of the adaptive algo-rithm. In the case of σ2v(t)...