Borehole radar signal identification with a time-frequency distribution

Satoshi Ebihara, Motoyuki Sato, Hiroaki Niitsuma

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


A technique for discrimination of a desired wave from measured borehole radar signal by using a time-frequency distribution(TFD) is discussed. Field measurement with a broad-band directional borehole radar equipped with micro array antennas was carried out for precise measurement of subsurface cracks. A direct coupling between transmitting and receiving antennas, which forms modes of guided waves along a radar sonde in a water-filled borehole, was theoretically analyzed and the propagation constant was determined. A TFD by Choi-Williams method is applied to the measured signal, which is a superposition of the direct coupling and desired reflected waves. From this TFD, we identified the guided wave and could extract reflected waves from radar targets.

Original languageEnglish
Pages (from-to)681-684
Number of pages4
JournalIEEE International Symposium on Electromagnetic Compatibility
Publication statusPublished - 1994 Dec 1
Externally publishedYes
EventProceedings of the 1994 International Symposium on Electromagnetic Compatibility - Miyagi, Jpn
Duration: 1994 May 161994 May 20

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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