• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 20 Issue 2
Apr.  2007
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Article Contents
ZHENG Shubin, LIN Jianhm, LIN Guobin. Variable Linear Phase IIR Filter for Extraction of Track Inspection Signals[J]. Journal of Southwest Jiaotong University, 2007, 20(2): 211-216.
Citation: ZHENG Shubin, LIN Jianhm, LIN Guobin. Variable Linear Phase IIR Filter for Extraction of Track Inspection Signals[J]. Journal of Southwest Jiaotong University, 2007, 20(2): 211-216.

Variable Linear Phase IIR Filter for Extraction of Track Inspection Signals

  • Received Date: 12 Aug 2006
  • Publish Date: 25 Apr 2007
  • A design method for variable IIR (infinite impulse response) filter based on spectral transformation was presented, and time reversed section technique was utilized to achieve its linear phase characteristic.The filter was designed to conform with the specification of extracting irregularity with wavelengths within 100 m.Simulation was conducted to check the frequency response errors of the linear phase IIR filter.Simulation result shows that the filter meets the design requirements for amplitude response and linear phase characteristic when the length of reversal section is 1 600.The linear phase IIR filter requires 95.5% less multiplications and 98.0% less additions than the conventional FIR fdter, and the ratio of buffer sizes for them is 9 614/2 135.Accuracy and validity of the variable linear phase IIR filter were verified by filtering actual track inspection signals.

     

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  • 杜鹤亭.长波长轨道不平顺检测中的数字滤波器方法[J].中国铁道科学,2000,21(4):58-65.DU Heting.Digital filtering method for long wave track irregularity inspection[J].China Railway Science,2000,21 (4):58-65.[2] ESVELD C.A numerical Butterworth filter for digital data processing with application to the analysis of track geometry[J].Rail IInternational,1980,11 (1):35-44.[3] OPENHEIMA V,MECKLENBR(A)UKER W F G,MERSEREAU R M.Variable cutoff linear phase digital filters[J].IEEE Trans.Circuits Syst.,1976,CAS-23:199-203.[4] JARSKE P,MITRA S K,NEUVO Y.Variable linear phase FIR filters[C]//Proc.IEEE Int.Conf.on Acoust..New York:Signal Processing,1988:1 463-1 466.[5] Deng T B.Design of arbitrary-phase variable digital filters using SVD-based Vector-Array decomposition[J].IEEE Trans.Circuits Syst.,2005,52(1):148-167.[6] 张辉.递归线性移变数字滤波器的一种优化设计方法[J].北方工业大学学报,1991,3(1):63-68.ZHANG Hui.The optimal design of recursive linear shift-variant digital filters[J].Journal of North China University of Technology,1991,3(1):63-68.[7] CONSTANTINIDES A G.Spectral transformations for digital filters[J].Proc.Inst.Elect.Eng.,1970,117(8):1 585-1 590.[8] MITRA S K,NEUVO Y,ROIVAINEN H.Design recursive digital filters with variable characteristics[J].International Journal on Circuit Theory and Applications,1990,18:107-119.[9] POWELL S,CHAU M.A technique for realizing linear phase IIR filters[J].IEEE Trans.Signal Processing,1991,39(11):2 425-2 435.[10] DjOKIé B,POPOVIé M,LUTOVAC M.A new improvement to the Powell and Chau linear phase IIR filters[J].IEEE Trans.Signal Processing,1998,46:1 685-1 688.
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