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Author: search.filters.author.Janchitrapongvej, K.Subject: search.filters.subject.Echo canceller

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    Adaptive echo canceller based on unbiased adaptive IIR notch filter
    (2008-12-01)
    Dhanawan, S.
    ;
    Benjangkaprasert, C.
    ;
    Janchitrapongvej, K.
    In this paper, an adaptive echo canceller based on unbiased equation error adaptive IIR notch filter for the echo cancellation in telephone network is presented. The unbiased equation error algorithm employs the bias removal techniques to remove the bias existing in the estimated parameter, resulting in obtaining good estimate of parameter for the echo canceller. The computer simulation results in terms of echo return loss enhancement (ERLE) are provided to confirm the performances of the presented adaptive echo canceller. © 2008 IEEE.
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    Echo cancellation using the new variable step-size algorithm adaptive lattice filters
    (2006-12-01)
    Sukhumalwong, S.
    ;
    Benjangkaprasert, C.
    ;
    Anantrasirichai, N.
    ;
    Janchitrapongvej, K.
    Adaptive algorithms are widely used for various application. One challenging application is an echo canceller in the long distance telephony network. Echo return loss and impulse response are important characteristics of an echo path for the design of echo cancellers. The performance of the echo cancellers depends on the choice of the adaptive filtering algorithm. This paper proposes the new variable step-size algorithm for adaptive lattice form structure filter for echo canceller. The proposed algorithm is an excellent in convergence speed, and provides high performance. The structure's stability had improved by Echo Return Loss Enhancement (ERLE). © 2006 ICASE.