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Volume 31 Issue 12
Dec.  2010
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Feng Wei, Ji Yi-cai, Fang Guang-you. Application of Cepstrum Filter to TDR Waveform Analysis[J]. Journal of Electronics & Information Technology, 2009, 31(12): 2984-2987. doi: 10.3724/SP.J.1146.2008.01784
Citation: Feng Wei, Ji Yi-cai, Fang Guang-you. Application of Cepstrum Filter to TDR Waveform Analysis[J]. Journal of Electronics & Information Technology, 2009, 31(12): 2984-2987. doi: 10.3724/SP.J.1146.2008.01784

Application of Cepstrum Filter to TDR Waveform Analysis

doi: 10.3724/SP.J.1146.2008.01784
  • Received Date: 2008-12-25
  • Rev Recd Date: 2009-06-12
  • Publish Date: 2009-12-19
  • The data processing in complex cepstrum domain can restrain the echo-like multi-reflection wave. The TDR (Time Domain Reflectometry) waveforms are analyzed in complex cepstrum domain in this paper. By filtering in complex cepstrum domain, the multi-reflection waves are eliminated. Used the cepstrum analysis, the travel time on the probes are determined. Apparent permittivity of soil is inversed with the cepstrum analysis. The results inversed with the complex domain filter method is more accurate than tangent-lines method.
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  • Oppenheim A V and Schafer R W. Homomorphic analysis ofspeech. IEEE Transactions on Audio and Electroacoustics,1968, AU-16(2): 221-226.[2]邹谋炎. 反卷积和信号复原. 第一版, 北京: 国防工业出版社,2004: 93-101.[3]Lin C P, Chun C C, and Tang S H. Accurate time domainreflectometry measurement of electrical conductivityaccounting for cable resistance and recording time. SoilPhysis SAJ, 2007, 71(4): 1278-1287.[4]Topp G C, Davis J L, and Annan A P. The earlydevelopment of TDR for soil measurements. Vadose ZoneJournal Soil Science Society of America, 2003, (2): 492-499.[5]Thomas A M, Chapman D N, and Rogers C D F, et al..Broadband apparent permittivity measurement in dispersivesoils using quarter-wavelength analysis. Soil Physis SAJ,2008, 72(5): 1401-1408.[6]Huisman J A, Lin C P, and Weihermueller L, et al.. Accuracyof bulk electrical conductivity measurements with timedomain reflectometry. Vadose Zone Journal, 2008, (5):426-433.[7]Childers D G, Skinner D P, and Kemerait R C . Thecepstrum: A guide to processing[J].Proceedings of the IEEE.1977, 65(10):1428-1443[8]Campell Scientific Inc. TDR Probes CS605, CS610, CS630,CS635, CS640, CS645 Instruction Manual. 2006.
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