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

Joint Blind Frequency Domain Equalization and Rateless Decoding Algorithm for Rateless Underwater Acoustic Communication

A technology of frequency domain equalization and underwater acoustic communication, applied in transmitter/receiver shaping network, digital transmission system, baseband system components, etc., can solve the problems of high complexity and low transmission efficiency

Active Publication Date: 2021-11-23
HARBIN INST OF TECH AT WEIHAI
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of high complexity and low transmission efficiency of existing related technologies, the present invention proposes a joint blind frequency domain equalization and rateless decoding algorithm for rateless underwater acoustic communication

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
  • Joint Blind Frequency Domain Equalization and Rateless Decoding Algorithm for Rateless Underwater Acoustic Communication
  • Joint Blind Frequency Domain Equalization and Rateless Decoding Algorithm for Rateless Underwater Acoustic Communication
  • Joint Blind Frequency Domain Equalization and Rateless Decoding Algorithm for Rateless Underwater Acoustic Communication

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0099] The blind frequency domain equalization performance analysis based on decision feedback structure in the present invention is as follows:

[0100] The invention proposes a joint blind frequency domain equalization and rateless decoding algorithm. For joint implementation, the present invention first proposes a blind frequency domain equalization based on a decision feedback structure, and then provides a joint implementation scheme on this basis, which can jointly implement blind frequency domain equalization and rateless decoding.

[0101] The block diagram of the rateless transmission system is as follows: figure 1 shown. a(n) is the source signal, c(n) is obtained by LT coding, c(n) is modulated signal r(n) obtained through the modulator, and the received signal u of the transmitted modulated signal r(n) passes through the underwater acoustic channel (n), which can be expressed as follows:

[0102]

[0103] Among them, h(n) represents the impulse response of th...

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 present invention relates to the technical field of underwater acoustic communication, specifically a joint blind frequency domain equalization and rateless decoding algorithm for rateless underwater acoustic communication. First, a blind frequency domain equalization based on decision feedback structure is proposed, and then On this basis, by exchanging soft information between the blind frequency domain equalization and the rateless decoder, an iterative process similar to Turbo equalization is realized, which improves the reliability and transmission efficiency of the system. The simulation results verify the effectiveness of the scheme. effectiveness and advantages.

Description

Technical field: [0001] The invention relates to the technical field of underwater acoustic communication, in particular to a joint blind frequency domain equalization and rateless decoding algorithm for rateless underwater acoustic communication. Background technique: [0002] Underwater acoustic channels have problems such as serious multi-channel phenomenon, high environmental noise, and prolonged transmission time. In order to effectively overcome severe intersymbol interference (Intersymbol Interference, ISI) caused by multipath fading, equalization technology is usually used, and channel coding technology can be used to improve transmission reliability. In the 1980s, there have been related researches considering the joint processing of decoding and equalization to achieve joint optimization. [0003] Rateless code is a coding method without a fixed code rate. The basic principle is that each coded signal has partial information of all coded information, and the sendi...

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): H04L25/03H04L25/02H04B13/02
CPCH04B13/02H04L25/03949H04L2025/03522
Inventor 刘志勇谭周美白帆
Owner HARBIN INST OF TECH AT WEIHAI
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