A New Variable Tap-Length and Step-Size FxLMS Algorithm

作者：Chang Dah Chung^*; Chu Fei Tao

来源：IEEE Signal Processing Letters, 2013, 20(11): 1122-1125.

DOI：10.1109/LSP.2013.2282396

• Active noise control
• FxLMS
• secondary path
• two-sided exponential decay envelop

The filtered-X least mean-square (FxLMS) algorithm is widely used for active noise control (ANC). A long tap-length is usually required for some FxLMS applications, and consequentially the convergence rate becomes very slow. In this letter, a new variable tap-length and step-size FxLMS algorithm is proposed, especially suited to a long tap-length filter. Taking into account the lowpass filter effect in the secondary path of ANC, the new algorithm is developed for the control filter with an unsymmetric and two-sided exponential decay envelop over its impulse response. Simulation results show that the new algorithm provides faster convergence and cancellation performance compared to previously proposed variable-step-size FxLMS algorithms.

• 出版日期2013-11
• 单位中央民族大学