• Title/Summary/Keyword: 직교 정사영 CMA

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A Constant Modulus Algorithm (CMA) for Blind Acoustic Communication Channel Equalization with Improved Convergence Using Switching between Projected CMA and Algebraic Step Size CMA (직교 정사영 CMA와 대수학적 스텝 사이즈 CMA 간 스위칭 방법을 통해 개선된 수렴성을 갖는 CMA형 블라인드 음향 통신 채널 등화기 연구)

  • Lim, Jun-Seok;Pyeon, Yong-Guk
    • The Journal of the Acoustical Society of Korea
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    • v.34 no.5
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    • pp.394-402
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    • 2015

  • CMA (Constant Modulus Algorithm) is one of the well-known algorithms in blind acoustic channel equalization. Generally, CMA converges slowly and the speed of convergence is dependent on a step-size in the CMA procedure. Many researches have tried to speed up the convergence speed by applying a variable step-size to CMA, e.g. the orthogonal projection CMA and algebraic optimal step-size CMA. In this paper, we summarize these two algorithms, and we propose a new CMA with improved convergence performance. The improvement comes from the switching between the orthogonal projection CMA and algebraic optimal step-size CMA. In simulation results, we show the performance improvement in the time invariant channels as well as in time varying channel.

  • https://doi.org/10.7776/ASK.2015.34.5.394 인용 PDF KSCI