Decoupled Second-Order Volterra Filter Structure Using the NLMF Adaptive Algorithm for Nonlinear Acoustic Echo Cancellation
Journal Title: Acta Technica Napocensis- Electronica-Telecomunicatii (Electronics and Telecommunications) - Year 2012, Vol 53, Issue 2
Abstract
The paper proposes a nonlinear acoustic echo cancellation setup based on a decoupled scheme of the second-order adaptive Volterra filter. The acoustic distortions that take place in the Loudspeaker-Enclosure-Microphone setup are modeled using measured linear and quadratic Volterra kernels. The adaptation of the filter weights is achieved by exploiting the Normalized Least-Mean-Fourth algorithm. The proposed method is compared with the usual direct adaptation procedure of the second-order Volterra filter using the same algorithm and the same step size values. Comparisons between these techniques regard the evolution of the Echo Return Loss Enhancement in terms of convergence rate and steady-state error. Experimental results for Laplacian distributed excitation show that the new approach increases the speed of convergence in comparison to the one given by the coupled version without enhancing the steady-state error.
Authors and Affiliations
Cristian CONTAN, Marina TOPA
A Medical Image Fusion Method For WEB Distributed Applications
Medical images acquired with different medical modalities contain important diagnostic information. The combination of complementary data from these images can lead to more important information for diagnosis process. T...
Study of Effects of The Short Time Fourier Transform Configuration On EEG Spectral Estimates
EEG signals recorded from scalp contain useful information about the activity of a large number of neurons. Signal processing is needed to extract this information from the EEG signal. Here we study the effects of config...
Evaluation Of The Plasma Cleaned Surface Of A Heritage Wooden Painting Using IQA Methods
In this paper a new approach regarding the assessment of the visual efficiency of the plasma cleaning treatment applied in artwork restoration is discussed. The proposed method, which was tested in the case of a wooden p...
Novel Current Line Sensor Based On Matched Optocouplers For Active Power Factor Correction
This paper presents a novel line current sensor which allows safe and accurate data acquisition for power factor measurements: it uses a pair of matched optocouplers arranged so that the difference between their outputs...
Integration of Network Coding Techniques in Future Internet Architectures
The paper introduces several new methods and experimental results on the integration of Network Coding techniques into the architectures proposed for the future Internet. Also, there are shortly presented some of the mai...