Novel sign subband adaptive filter algorithms with individual weighting factors
An individual-weighting-factors SSAF (IWF-SSAF) algorithm is proposed by re-examining the way to compute the weighting factor in the SSAF algorithm, aiming to improve the filter?s performance. The mean-square performance (including the transient-state and steady-state) of the IWF-SSAF algorithm is analyzed. Moreover, the analysis results are supported by simulations. For sparse systems, we also develop an improved proportionate IWF-SSAF (IWF-IPSSAF) algorithm by incorporating the proportionate idea into the IWF-SSAF, which speeds up the convergence rate. The performances of the proposed algorithms are verified in the context of acoustic echo cancellation.
sign subband adaptive filter individual weighting factor acoustic echo cancellation proportionate sign subband adaptive filter impulsive interference system identification