Robust fast affine projection algorithm for acoustic echo cancellation

speech signals. On the other hand, the affine projection (AP) algorithm, which is a generalization of the NLMS algorithm, has better convergence properties but is computationally demanding and has some numerical problems. There exists a computationally more efficient version of the AP algorithm, namely, the fast affine projection (FAP) algorithm. But it still has numerical instability problems. In this paper these problems are hindered by introducing some modifications to the FAP. Eventually, this new algorithm comes very close to the adaptive decorrelation NLMS approach, but it is computationally less demanding.

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