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A Frequency Domain Step-Size Control Method for LMS Algorithms
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DOI：10.1109/LSP.2009.2032996.png)
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摘要
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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.
Keyword:
Adaptive filters
least-mean-square (LMS) algorithm
variable step size
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9.6
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1.1W
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1.7W
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