Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Elastic wave through-the-earth signal diversity reception method

A technology of diversity reception and elastic wave, applied in frequency diversity, diversity/multi-antenna system, electrical components, etc., can solve the problem of not considering multi-mode signal and multi-migration carrier signal, so as to suppress multi-path fading and improve reception gain , the effect of improving the signal-to-interference-noise ratio

Inactive Publication Date: 2012-11-21
SHANDONG UNIV OF SCI & TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned diversity reception techniques do not consider multi-mode signals and multi-transfer carrier signals. The present invention is just to solve the problem of elastic wave multi-mode multi-frequency diversity reception.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Elastic wave through-the-earth signal diversity reception method
  • Elastic wave through-the-earth signal diversity reception method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] A method for diversity reception of elastic wave ground-penetrating signals, comprising a channel detection step and an information transmission step;

[0043] The channel sounding steps include:

[0044] (1) Select a frequency point and a sequence code, spread-spectrum modulate the detection signal based on the sequence code and frequency point onto a certain carrier, and amplify the carrier signal;

[0045] (2) According to the carrier signal amplified in step (1), it is converted into an elastic P wave by a loudspeaker (elastic wave transmitting antenna) and coupled to the earth channel for transmission;

[0046] (3) according to step (2) through the signal after the ground channel propagation, receive respectively with P wave pickup, SH wave pickup, SV wave pickup and R wave pickup, the weak elastic wave signal that each pickup obtains is converted into electric signal;

[0047] (4) According to the four electrical signals obtained in step (3), the migration freque...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an elastic wave through-the-earth signal diversity reception method, and relates to diversity reception technology applied in the fields of exploration and through-the-earth communication. In the method, signals dispersed at each frequency point and in each transmission mode are organically fused together at an earth channel receiving end by adopting a way of multi-mode reception and multi-frequency point reception diversity, so the signal-to-noise (SNIR) of the receiving end is improved. When elastic waves are transmitted in an earth medium, the transmission mode of the elastic waves is changed, while frequency is shifted under the influence of the piezoelectric effect, waveguiding effect and resonant cavity effect of the earth medium. The method provided by the invention has the advantages of improving reception gain by collecting signal energy dispersed in each mode and at each frequency point, and suppressing the attenuation of the elastic waves in the earthmedium by the diversity combination of multi-mode and multi-frequency information to finally fulfill the aim of improving the detection performance of a receiver.

Description

technical field [0001] The invention relates to the technical field of geological exploration and ground-penetrating communication, in particular to a diversity receiving method of elastic wave ground-penetrating signals. Background technique [0002] In the ground-penetrating communication system, the single-frequency elastic wave is used as the carrier, the information is carried by the spread-spectrum modulated wave, and the modulated wave is coupled to the earth in the form of P wave by the ground-coupled speaker. At the receiving end, it is found that the received signal at more frequency points is closely related to the intensity of the transmitted signal. At the same time, the received signal not only contains the same P wave component as the transmitting end, but also S wave and R wave signals that are closely related to the transmitting signal. After consulting the relevant theories of seismic wave propagation and geological exploration, it is found that there are d...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/12H04B1/711
Inventor 郭银景吕文红郝建军王婷杨军丁庆安王正杰
Owner SHANDONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com