Frame synchronization device capable of suppressing and measuring Doppler in underwater acoustic communication

A technology of underwater acoustic communication and frame synchronization, which is applied in the shaping network, electrical components, transmission system, etc.

Active Publication Date: 2013-04-03
XIAMEN UNIV
View PDF8 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method itself cannot realize the frame synchronization process, and it needs to rely on the time starting point information provided after the frame synchronization is established for DSP frequency measurement, Doppler estimation and correction

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
  • Frame synchronization device capable of suppressing and measuring Doppler in underwater acoustic communication
  • Frame synchronization device capable of suppressing and measuring Doppler in underwater acoustic communication
  • Frame synchronization device capable of suppressing and measuring Doppler in underwater acoustic communication

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] In order to make the technical content, features, and advantages of the present invention more obvious and easy to understand, a frame synchronization device that can suppress and measure Doppler in underwater acoustic communication is described below in conjunction with the accompanying drawings:

[0043] like figure 1 As shown, the embodiment of the present invention is provided with:

[0044] A front-end module 1, the input end of the front-end module 1 is connected to the signal output end of the underwater acoustic transducer A at the receiving end, and is used for pre-processing the received signal.

[0045] Analog-to-digital conversion module (ADC module), the analog-to-digital conversion module is composed of 3-way AD sampling ADC1, ADC2, and ADC3 controlled by DDS chips DDS1, DDS2, and DDS3, and the input terminals of the 3-way AD sampling ADC1, ADC2, and ADC3 Connect to the output terminal of pre-module 1.

[0046] An operation module 3, the operation module...

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 discloses a frame synchronization device capable of suppressing and measuring Doppler in underwater acoustic communication, relating to underwater acoustic communication equipment. The frame synchronization device is provided with a front-loading module, an analogue-digital conversion module, an operation module and a frame synchronization establishment/Doppler measurement module. The input end of the front-loading module is connected with the signal output end of an underwater acoustic transducer at a receiving end; the analogue-digital conversion module is composed of three paths of AD (analogue-digital) sampling converters, namely, an ADC (Analogue-Digital Converter) 1, an ADC2 and an ADC3 which are controlled by DDS (Digital Direct Frequency Synthesis) chips, namely, a DDS1, a DDS2 and a DDS3, and the input ends of the three paths of AD sampling converters, namely, the ADC1, the ADC2 and the ADC3 are connected with the output end of the front-loading module; the input end of the operation module is connected with the digital signal output ends of the three paths of AD sampling circuits, namely, the ADC1, the ADC2 and the ADC3 after analogue-digital conversion; and the input end of the frame synchronization establishment/Doppler measurement module is connected with the three operation result output ends of the operation module after related processing copying. Doppler effect suppression can be simply and conveniently realized, and Doppler can be measured in underwater acoustic communication.

Description

technical field [0001] The invention relates to underwater acoustic communication equipment, in particular to a frame synchronization device capable of suppressing and measuring Doppler in underwater acoustic communication. Background technique [0002] Underwater acoustic communication technology can be widely used in marine resource exploration, marine development, marine environment monitoring, underwater operations and other fields. It is an important hotspot and frontier of marine high technology. Due to the strong and complex random time-space-frequency effect, multipath effect, Doppler effect and background noise of the ocean channel, the design of a high-performance underwater acoustic communication system is a very challenging task. [0003] Since the speed of sound in seawater differs by five orders of magnitude from the propagation velocity of electromagnetic waves in air, compared with wireless communication systems, the Doppler effect caused by the unevenness of...

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 Applications(China)
IPC IPC(8): H04B13/02H04L25/03
Inventor 童峰周跃海陈东升李芳兰
Owner XIAMEN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap