Abstract:Based on Affine Projection Algorithm with Selective Regressors(SR-APA)，a new algorithm is proposed with a view to data reusing factor. The proposed algorithm introduces a weighting method to change the selective principles. Unweighted original data is reused in the iteration to avoid increasing the condition number of the input data, and finally the steady state Mean Square Error(MSE) is reduced. Simulation results show that the proposed algorithm not only reaches lower steady state MSE than SR-APA, but also accelerates the convergence speed of SR-APA. And with the same performance，the proposed algorithm has only 50% computations of SR-APA.