Variable tap-length non-parametric variable step-size NLMS adaptive filtering algorithm for acoustic echo cancellation

SH Pauline, D Samiappan, R Kumar, A Anand, A Kar - Applied Acoustics, 2020 - Elsevier
In teleconferencing and communication systems, the use of Loudspeaker Enclosure
Microphone device leads to undesired echoes. To reduce these echoes, an acoustic echo …

Exact expectation evaluation and design of variable step-size adaptive algorithms

P Lara, F Igreja, LDTJ Tarrataca… - IEEE Signal …, 2018 - ieeexplore.ieee.org
The choice of a fixed step size in adaptive filtering algorithms implies a conflict between the
convergence rate and the steady-state performance. In order to address this tradeoff more …

Efficient Volterra systems identification using hierarchical genetic algorithms

LS de Assis, JRP Junior, L Tarrataca, DB Haddad - Applied Soft Computing, 2019 - Elsevier
The Volterra series consists of a powerful method for the identification of non-linear
relationships. However, the identification of the series active basis sets requires intense …

An exact expectation model for the LMS tracking abilities

TTP Silva, P Lara, F Igreja… - IEEE Transactions …, 2020 - ieeexplore.ieee.org
Nonstationary environments are ubiquitous in communications and acoustic systems. The
ability to track their dynamics is one of the most desirable features of adaptive processing …

Analysis of the least mean squares algorithm with reusing coefficient vector

LC Resende, RMS Pimenta, NN Siqueira, F Igreja… - Signal Processing, 2023 - Elsevier
The coefficient reuse strategy is able to improve the steady-state performance of adaptive
filter algorithms, especially in very challenging low signal-to-noise scenarios. This paper …

New efficient subband structures for blind source separation

PB Batalheiro, MR Petraglia, DB Haddad - Signal Processing, 2021 - Elsevier
Convolutive mixtures of signals generated by more than one source and acquired by a set of
microphones are commonly found in acoustic signal processing applications. Subband …

Constrained least mean square algorithm with coefficient reusing

VSN Junior, MP Tcheou, MHC Dias… - Circuits, Systems, and …, 2021 - Springer
The constrained least mean square (CLMS) algorithm is one of the most popular online
linear-equality-constrained beamforming algorithms. This paper demonstrates for the first …

Advances on the analysis of the LMS algorithm with a colored measurement noise

P Lara, DB Haddad, L Tarrataca - Signal, Image and Video Processing, 2020 - Springer
Due to the inherent feedback feature of adaptive filtering algorithms, a comprehensive
theoretical understanding of their learning process is still challenging. In order to make the …

On the Skewness of the LMS adaptive weights

TTP Silva, F Igreja, P Lara, L Tarrataca… - … on Circuits and …, 2021 - ieeexplore.ieee.org
The adjustable weights of adaptive filtering algorithms are usually assumed to obey a
Gaussian distribution. This is somewhat natural under maximal-entropy considerations …

Novel proportionate adaptive filters with coefficient vector reusing

JVG de Souza, DB Haddad, FR Henriques… - Circuits, Systems, and …, 2020 - Springer
In this paper, a new family of adaptive filtering algorithms is presented, which aims to
combine the small misalignment resulting from the reuse of past weight vectors with the fast …