The

th mean convergence of an adaptive filtering algorithm

is studied, where

\´s and

\´s are useful random signals and observation vectors, respectively, and

is a sequence of positive numbers decreasing to zero. In this work, we suppose that the sequence

is a stationary mixing sequence (

-mixing,

-mixing, or

-mixing). Under some additional conditions it is shown that

converges to

in the

th mean, where

is the unique solution of the Wiener-Hopf equation.