A Frequency Domain Step-Size Control Method for LMS Algorithms

作者：Shi Kun^*; Ma Xiaoli

来源：IEEE Signal Processing Letters, 2010, 17(2): 125-128.

DOI：10.1109/LSP.2009.2032996

• Adaptive filters
• least-mean-square (LMS) algorithm
• variable step size

Frequency-domain (FD) adaptive filters are able to reduce the numerical complexity by using the overlap-and-save implementation method compared to time-domain (TD) ones. Similar to the TD algorithms, the selection of step size trades off between the convergence rate and steady state performance. In this letter, we propose a bin-wise block-varying step-size control method for the FD least-mean-square (LMS) algorithm. It achieves both fast convergence rate and low steady state error. In addition, compared to the TD step-size control method, the proposed method performs better when the filter input is a non-white process. Effectiveness of the proposed algorithm is demonstrated through computer simulations.

• 出版日期2010-2