Interference-Term Elimination for Wigner Distribution Using a Frequency Domain Adaptive Filter Interference-Term Elimination for Wigner Distribution Using a Frequency Domain Adaptive Filter

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Abstract

・rights:日本機械学会・rights:本文データは学協会の許諾に基づきCiNiiから複製したものである・relation:isVersionOf:http://ci.nii.ac.jp/naid/110004089601/

In a nonstationary signal analysis, it has been clarified that the discrete Wigner distribution, WD, is the most suitable distribution. The use of the WD is, however, often complicated by the occurrence of interference terms. Thus, we proposed a modified WD, called the RID (reduced interference distribution), and verified that the RID could markedly suppress the occurrence of interference terms in both the auto-and the cross-WD. In this study, we developed another method which makes use of a block adaptive filter to eliminate interference terms and evaluate them quantitatively. In this method, the least mean square, LMS, algorithm is applied in the frequency domain. Simulated signals of a chirp type and an acoustic signal of a concert hall are analyzed using spectrograms, WD, RID and the new method. From comparisons among the results, it is concluded that the best result can be obtained using the new method proposed in this study.

Journal

  • JSME International Journal Ser. C Dynamics, Control, Robotics, Design and Manufacturing

    JSME International Journal Ser. C Dynamics, Control, Robotics, Design and Manufacturing 39(4), 808-814, 1996-12-01

    The Japan Society of Mechanical Engineers

References:  6

Codes

  • NII Article ID (NAID)
    110004089601
  • NII NACSIS-CAT ID (NCID)
    AA10898309
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    13408062
  • NDL Article ID
    4099064
  • NDL Source Classification
    ZN11(科学技術--機械工学・工業)
  • NDL Call No.
    Z53-Y272
  • Data Source
    CJP  NDL  NII-ELS  IR 
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