Modified multidelay adaptive filter for acoustic echo cancellation

In this paper a partial knowledge of measurement noise is incorporated into the multidelay frequency domain adaptive filtering scheme to improve its performance in colored measurement noise scenarios. The proposed algorithm is obtained by minimizing a BLUE criterion function using the stochastic gradient method and then switching over to the frequency domain to reduce the computational complexity. The performance of the algorithm in the situations of colored measurement noise is demonstrated by means of simulations using stationary as well as speech signals.