Publicatii

Applied Sciences / 2024
Kalman Filter Using a Third-Order Tensorial Decomposition of the Impulse Response
For system identification problems associated with long-length impulse responses, the recently developed decomposition-based technique that relies on a third-order tensor (TOT) framework represents a reliable choice. It is based on a combination of three shorter filters, which merge their estimates in tandem with the Kronecker product. In this way, the global impulse response is modeled in a more efficient manner, with a significantly reduced parameter space (i.e., fewer coefficients). In this paper, we further develop a Kalman filter based on the TOT decomposition method. As compared to the recently designed recursive least-squares (RLS) counterpart, the proposed Kalman filter achieves superior performance in terms of the main criteria (e.g., tracking and accuracy). In addition, it significantly outperforms the conventional Kalman filter, while also having a lower computational complexity. Simulation results obtained in the context of echo cancellation support the theoretical framework and the related advantages. Citeste mai mult

IEEE Access / 2023
Prediction Error Method (PEM)-Based Howling Cancellation in Hearing Aids: Can We Do Better
This work develops an effective technique acoustic feedback cancellation (AFC) in the digital hearing aid (DHAid) devices. The normalized least mean square (NLMS) algorithm-based AFC method may suffer from a biased convergence. The biased convergence problem is considerably resolved by the prediction error method (PEM)-based AFC (PEM-AFC); however, it may demonstrate a slow convergence. The proposed method's main structure is based two adaptive filters. The main adaptive AFC filter receives its input from the DHAid receiver signal, while the auxiliary AFC filter is activated by a probe signal. The main idea is to apply a lattice filtering-based pre-processing for decorrelation in the main AFC filter's update equation. This produces a Newton-like adaptive algorithm with fast convergence. Additionally, ... Citeste mai mult

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Rezultate

7 articole in reviste cotate ISI cu factor de impact cumulat de aproximativ 31 si un factor de impact relativ cumulat de 8.469, (conform Thomson Reuters 2023 Journal Citation Reports), 13 articole in conferinte indexate ISI, si alte baze de date internationale (IEEE Xplore, Scopus, DBLP and Google Scholar). Numarul de citari este de peste 370 pana la 16 noiembrie 2024.

• Raport stiintific 2022

  5 Decembrie 2022

• Raport stiintific 2023

  5 Decembrie 2023

• Raport stiintific 2024

  5 Decembrie 2024