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Journal of Applied Sciences >

2012 , Vol. 30 >Issue 6: 601 - 606

DOI: https://doi.org/10.3969/j.issn.0255-8297.2012.06.007

Signal and Information Processing

Improved LMS Adaptive Filter with Convex Combined Variable Fractional Tap-Length

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  • 1. Electronic Information Engineering Department, Naval Aeronautical and Astronautical University,
    Yantai 264001, Shandong Province, China
    2. Graduate Students’ Brigade, Naval Aeronautical and Astronautical University,
    Yantai 264001, Shandong Province, China

Received date: 2011-04-21

  Revised date: 2011-07-28

  Online published: 2011-07-28

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Abstract

In digital filters, the parameter setting and SNR affect performance of the variable order least mean square (LMS) algorithm, especially in a variable noise environment. Stable performance of variable order LMS is an important factor in the evaluation of filters. This paper analyzes stability of convex combined variable tap-length LMS. According to the variable error width, convex combination of adaptive filters for variable fractional tap-length LMS algorithm based on variable width is proposed. Theoretical analysis and simulation results show that, in a variable noise environment, the proposed algorithm can better suit the environment and converge faster, and is more stable in tap-length, as compared to other techniques including convex combination of adaptive filters for variable fractional tap-length LMS algorithm and adaptive filters for a variable tap-length LMS algorithm based on variable error width.

Key words： adaptive filter; least mean square; convex combination; variable tap-length; variable error width

Cite this article

RUI Guo-sheng1, MIAO Jun2, ZHANG Yang2, XU Bin2, ZHANG Song2 . Improved LMS Adaptive Filter with Convex Combined Variable Fractional Tap-Length[J]. Journal of Applied Sciences, 2012 , 30(6) : 601 -606 . DOI: 10.3969/j.issn.0255-8297.2012.06.007

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