An Improved Variable Structure Adaptive Filter Design and Analysis for Acoustic Echo Cancellation
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2015-04
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Společnost pro radioelektronické inženýrství
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Abstract
In this research an advance variable structure adaptive Multiple Sub-Filters (MSF) based algorithm for single channel Acoustic Echo Cancellation (AEC) is proposed and analyzed. This work suggests a new and improved direction to find the optimum tap-length of adaptive filter employed for AEC. The structure adaptation, supported by a tap-length based weight update approach helps the designed echo canceller to maintain a trade-off between the Mean Square Error (MSE) and time taken to attain the steady state MSE. The work done in this paper focuses on replacing the fixed length sub-filters in existing MSF based AEC algorithms which brings refinements in terms of convergence, steady state error and tracking over the single long filter, different error and common error algorithms. A dynamic structure selective coefficient update approach to reduce the structural and computational cost of adaptive design is discussed in context with the proposed algorithm. Simulated results reveal a comparative performance analysis over proposed variable structure multiple sub-filters designs and existing fixed tap-length sub-filters based acoustic echo cancellers.
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Radioengineering. 2015 vol. 24, č. 1, s. 252-261. ISSN 1210-2512
http://www.radioeng.cz/fulltexts/2015/15_01_0252_0261.pdf
http://www.radioeng.cz/fulltexts/2015/15_01_0252_0261.pdf
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Peer-reviewed
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en