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      Investigation on Time Domain Coded Electromagnetic Exploration Method

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          Abstract

          To suppress airwave interference, a time-domain coded electromagnetic exploration method is proposed with Pseudo-Random Binary Sequences (PRBS) code as the source signal. Based on the PRBS code and receiving voltages, which are recorded simultaneously, the impulse response of the earth can be obtained by the time-domain deconvolution signal recovery method, and the target information is effectively contained in the impulse response. The selection methods of clock frequency and code length were analyzed and field experiments were carried out, which demonstrated that the signal quality of the EM data could be improved by decreasing the clock frequency, or increasing the code length. The proposed method could greatly suppress the airwave interference and effectively identify underground anomalies.

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          Author and article information

          Journal
          Journal of Radars
          Chinese Academy of Sciences
          01 June 2014
          : 3
          : 2
          : 158-165
          Affiliations
          [1 ] Key Laboratory of Electromagnetic Radiation and Sensing Technology, Chinese Academy of Sciences
          Article
          fd12fdc0d90d4a81a6d1a5fa0bcddcb5
          10.3724/SP.J.1300.2014.13092

          This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

          Categories
          Technology (General)
          T1-995

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