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Method for identifying electromagnetic ground impulse response

A technology of impulse response and identification method, applied in the field of geophysical exploration, can solve the problems of insufficient identification accuracy and immaturity, and achieve the effect of improving identification accuracy

Active Publication Date: 2015-04-08
INST OF ELECTRONICS CHINESE ACAD OF SCI +2
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Problems solved by technology

However, for the system using the m-sequence as the excitation source waveform, the identification accuracy is insufficient due to the immature method of how to overcome the influence of the autocorrelation sidelobe of the transmitted signal

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  • Method for identifying electromagnetic ground impulse response
  • Method for identifying electromagnetic ground impulse response
  • Method for identifying electromagnetic ground impulse response

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Embodiment Construction

[0069] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0070] The invention provides an identification method of electromagnetic ground impulse response, which is used in geophysical electromagnetic method exploration. The method transmits the waveform to encode, and collects the coded transmitted waveform and the response observation signal synchronously during the observation, and then adopts the method based on the principle of cross-correlation identification to eliminate the complex influence of the transmitted signal's autocorrelation sidelobe from the transmitted and received signals, so as to realize the detection of the geodetic shock. High-precision identification of the excitation response.

[0071] Combine below figure 1 To further illustrate the present inventi...

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Abstract

The invention discloses a method for identifying electromagnetic ground impulse response. The method comprises the following steps: designing an electromagnetic ground impulse response identification system according to a Wiener-Hopf equation; coding and transmitting an artificial source electromagnetic method transmitting waveform by using a pseudorandom sequence; synchronously acquiring the coded transmitting waveform and a response observed signal during observation; eliminating the complex influence of the autocorrelation side-lobe of a transmitted signal in received and transmitted signals by adopting a method based on a cross-correlation identification principle to realize high-accuracy identification of ground impulse response. Compared with the conventional step source excitation way, the method disclosed by the invention has the advantage that the influence of the autocorrelation side-lobe of a transmitted waveform is eliminated through receiving and transmission cross-correlation, so that the identification accuracy of the electromagnetic ground impulse response is remarkably increased.

Description

technical field [0001] The present invention relates to the field of geophysical prospecting, more specifically, to a method for identifying the electromagnetic earth impulse response, which is suitable for identifying the earth impulse response with high precision from the observation data of the geophysical electromagnetic prospecting system, and is especially suitable for Geophysical electromagnetic prospecting system based on encoded emission current. Background technique [0002] With the development of science and technology, researchers are facing more and more complex objects, such as chemical and chemical processes, biomedical systems, socioeconomic systems, environmental systems, etc. It is usually difficult to obtain their mathematical models by theoretical analysis methods for these complex objects. The research on this kind of object raises a question: how to identify the mathematical model and parameters of this kind of object? [0003] It is based on the abov...

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Application Information

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IPC IPC(8): G01V3/08
Inventor 武欣方广有薛国强底青云张一鸣
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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