ZHANG, Y. ... et al, 2007. A new variable tap-length LMS algorithm to model an exponential decay impulse response. IEEE Signal Processing Letters, 14 (4), pp. 263-266.
This letter proposes a new variable tap-length least-mean-square (LMS) algorithm for applications in which the unknown filter impulse response sequence has an exponential decay
envelope. The algorithm is designed to minimize the mean-square
deviation (MSD) between the optimal and adaptive filter weight
vectors at each iteration. Simulation results show the proposed algorithm
has a faster convergence rate as compared with the fixed
tap-length LMS algorithm and is robust to the initial tap-length