Active Noise Control using Variable step-size Griffiths’ LMS (VGLMS) algorithm on Real-Time platform

Vinay, V and Roopashree, V and Narasimhan, SV and Shivamurti, M (2010) Active Noise Control using Variable step-size Griffiths’ LMS (VGLMS) algorithm on Real-Time platform. In: conference at dharwad.

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    Abstract

    This paper proposes implementation of Griffith’s Variable step-size algorithm for Active Noise Control (ANC) on ADSP-TS201 EZ-Kit Lite. The dual computational units and execution of up to four instructions per cycle which are special features over other processors are best utilized to generate an optimized code. The VGLMS provides improved secondary path estimation and computations involved are marginal as the same gradient is used for step-size computation and coefficient adaptation. The improved secondary path estimate, in turn improves the ANC performance. Further, variable step-size algorithm is used for the main-path to achieve faster convergence. Both for narrowband (fundamental and its harmonics) and broadband noise fields, for a duct the attenuation achieved is 25 dB and 15 dB respectively. The program execution time was only 1.25% for an input sampling rate of 1 KHz which indicates the utility of the special features of the processor considered. Further these features have enabled in bringing down the program memory requirement in the implementation of the algorithm.

    Item Type: Conference or Workshop Item (Paper)
    Subjects: ENGINEERING > Electronics and Electrical Engineering
    Division/Department: Aerospace Electronics and Controls Division, Aerospace Electronics and Controls Division, Aerospace Electronics and Controls Division, Aerospace Electronics and Controls Division
    Depositing User: Mr M shivamurti
    Date Deposited: 14 Jun 2011 15:41
    Last Modified: 14 Jun 2011 15:41
    URI: http://nal-ir.nal.res.in/id/eprint/9219

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