Digital Interference Elimination and Avoidance Method and Device in Digital Interpretation System Through Steel

A steel-piercing, digital technology, applied in the direction of digital transmission system, transmission system, baseband system, etc., can solve the problem that complex data interference signals cannot be eliminated, and achieve the effects of easy engineering implementation, maintaining orthogonality, and improving accuracy

Active Publication Date: 2019-11-29
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method and device for eliminating and avoiding digital interference in the simultaneous transmission system of digital transmission through steel, so as to solve the problem existing in the prior art that the interference signal in complex data cannot be eliminated

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  • Digital Interference Elimination and Avoidance Method and Device in Digital Interpretation System Through Steel
  • Digital Interference Elimination and Avoidance Method and Device in Digital Interpretation System Through Steel
  • Digital Interference Elimination and Avoidance Method and Device in Digital Interpretation System Through Steel

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Embodiment 1

[0080] An embodiment of the present invention provides a method for eliminating digital interference in a steel-piercing digital energy simultaneous transmission system. The steel-piercing digital energy simultaneous transmission system includes: an energy transmission link and a data transmission link, and the method includes:

[0081] At the receiving end of the data transmission link, obtain the data signal after filtering the fundamental wave signal outside the transmission frequency band, wherein the data signal includes: real numbers and complex numbers;

[0082] Adjusting the weight coefficient of the adaptive filter through the weight coefficient iteration formula, so that the interference signal output by the adaptive filter tends to the interference signal in the data signal;

[0083] The interference signal output by the adaptive filter is subtracted from the data signal to obtain the OFDM signal after the interference is eliminated.

[0084] In the method for elimi...

Embodiment 2

[0130] An embodiment of the present invention provides a method for avoiding digital interference in a simultaneous transmission system for digital energy through steel, wherein the simultaneous transmission system for digital energy through steel includes: an energy transmission link and a data transmission link, and the method includes:

[0131] When symbol modulation is performed at the sending end of the data transmission link, 0 will be inserted before the data signal transmitted by the interfered sub-channel, so that the data signal will be transmitted through the next normal sub-channel, wherein the data signal includes: real numbers and complex numbers ;

[0132] Before symbol demodulation is performed at the receiving end of the data transmission link, the data signal before demodulation is multiplied by the avoidance vector, and no symbol demodulation is performed on the transmitted data of the interfered sub-channel.

[0133] In the method for avoiding digital inter...

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Abstract

The invention provides a digital interference elimination and avoiding method in a steel passing data and energy simultaneous transmission system and an apparatus thereof. Data signal transmission accuracy can be increased. The interference elimination method comprises the following steps of at a receiving end of a data transmission link, acquiring a data signal; adjusting a weight coefficient of an adaptive filter so that an interference signal output by the adaptive filter tends to an interference signal in the data signal; and through subtracting the interference signal output by the adaptive filter from the data signal, acquiring an OFDM signal after the interference is eliminated. The interference avoiding method comprises the following steps of when symbol modulation is performed on a data transmission link sending end, inserting 0 in front of a data signal transmitted by an interfered subchannel so that the data signal is transmitted through a next normal subchannel; and before the symbol modulation is performed on the data transmission link receiving end, multiplying the data signal before the demodulation by an avoided vector, wherein the symbol modulation is not performed on the transmission data of the interfered subchannel. The method and the apparatus are suitable for the ultrasonic wave communication technology field.

Description

technical field [0001] The invention relates to the technical field of ultrasonic communication, in particular to a method and device for eliminating and avoiding digital interference in a simultaneous digital transmission system through steel. Background technique [0002] When monitoring systems, processes, machines, and other real-time hardware, there is an urgent need to improve the safety, effectiveness, and cost reduction of inspections. Radio frequency (RF) wireless transmission has greatly improved this situation, allowing data to be easily transferred from remote sensors to control systems or data logging devices. However, radio frequency (RF) signals cannot pass through closed metal structures, such as pressure pipes, ship hulls, and closed containers, because the Ferrari effect of these structures shields the RF signal. However, closed metal structures are widely used in the fields of oil, gas, chemical process and nuclear energy, so traditional radio frequency t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04L27/26
CPCH04L25/03019H04L27/2647
Inventor 刘涛孟丹
Owner UNIV OF SCI & TECH BEIJING
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