• Title/Summary/Keyword: Secondary Path Estimatiom

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IIR Structure Secondary Path Estimation Algorithms for Active Noise Control Systems (능동소음제어를 위한 IIR 구조 2차경로 추정 알고리즘)

  • Choi, Young-Hun;Ahn, Dong-Jun;Nam, Hyun-Do
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.25 no.2
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    • pp.143-149
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    • 2011
  • In this paper, IIR structures are proposed to reduce the computation complexity of the secondary-pass estimation in active noise control(ANC) systems. However, there are stability problems of using IIR models to reduce the computation complexity in ANC systems. To overcome these problems, we propose a stabilizing procedure of recursive least mean squares (RLMS) algorithms for eatimating the parameters of IIR models of the secondary path transfer functions. The multichannel ANC systems are implemented by using the TMS320C6713 DSP board to test the performance of computation complexity and stability of the proposed methods. Comparing the IIR filters with the FIR filters, the IIR filters can reduce 50[%] of the computation and obtain similar noise reduction result.