• Title/Summary/Keyword: 정규화된 다채널 FxLMS

Search Result 1, Processing Time 0.017 seconds

Multi-channel normalized FxLMS algorithm for active noise control (능동 소음 제어를 위한 정규화된 다채널 FxLMS 알고리즘)

  • Chung, Ik Joo
    • The Journal of the Acoustical Society of Korea
    • /
    • v.35 no.4
    • /
    • pp.280-287
    • /
    • 2016
  • In this paper, we propose a normalization algorithm that can be applied to adaptive filters for multi-channel active noise control. The FxLMS (Filtered-x Least Mean Square) algorithm for the single-channel active noise control can be normalized in the same way as the NLMS (Normalized Least Mean Square) algorithm, whereas in case of the multi-channel active noise control, the single-channel normalization for the FxLMS algorithm cannot be extended to the normalization for the multi-channel FxLMS algorithm straightforwardly. First, we adopt a generalized normalization algorithm for the multi-channel FxLMS algorithm based on the principle of minimal disturbance and then, proposed a normalized algorithm considering only diagonal elements to avoid computation for matrix inversion. We carried out performance comparisons of the proposed algorithm with other algorithms without normalization. It is shown that the proposed algorithm presents better convergence characteristics under non-stationary environments.