Wavelet-transform-based timefrequency domain reflectometry for reduction of blind spot

Sin Ho Lee, Jin Bae Park, Yoon Ho Choi

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


In this paper, wavelet-transform-based timefrequency domain reflectometry (WTFDR) is proposed to reduce the blind spot in reflectometry. TFDR has a blind spot problem when the time delay between the reference signal and the reflected signal is short enough compared with the time duration of the reference signal. To solve the blind spot problem, the wavelet transform (WT) is used because the WT has linearity. Using the characteristics of the WT, the overlapped reference signal at the measured signal can be separated and the blind spot is reduced by obtaining the difference of the wavelet coefficients for the reference and reflected signals. In the proposed method, the complex wavelet is utilized as a mother wavelet because the reference signal in WTFDR has a complex form. Finally, the computer simulations and the real experiments are carried out to confirm the effectiveness and accuracy of the proposed method.

Original languageEnglish
Article number065004
JournalMeasurement Science and Technology
Issue number6
Publication statusPublished - 2012 Jun

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics


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