Partial update PNLMS algorithm for network echo cancellation

The proportionate normalized least mean square (PNLMS) algorithm has been proposed for network echo cancellation to take advantages of the sparseness of the echo path impulse responses. The PNLMS algorithm has fast initial convergence but slows down dramatically after the initial period. In this paper, a novel algorithm to combine the PNLMS algorithm with the technique of partial update is proposed. Simulation results show that the proposed algorithm can achieve faster overall convergence with less computation.