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

A frequency hopping fountain code system and its transmission method

A fountain code and fountain code technology, applied in the transmission field of the frequency hopping fountain code system, can solve problems such as increasing the complexity of system coding and decoding, reducing the information transmission rate, and the bit error rate cannot meet actual needs, etc., to achieve enhanced reliability , improve the bit error rate performance, and improve the effect of security

Inactive Publication Date: 2016-06-22
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the Raptor fountain code using low bit rate LDPC code as precoding has a certain error correction capability, the bit error rate of the system transmission cannot meet the actual needs under certain circumstances
Using error-correcting codes such as convolutional codes can reduce the bit error rate of the system, but it will increase the complexity of system coding and decoding, and at the same time, because it will bring new redundancy, it will inevitably reduce the transmission rate of information

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
  • A frequency hopping fountain code system and its transmission method
  • A frequency hopping fountain code system and its transmission method
  • A frequency hopping fountain code system and its transmission method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] figure 1 and figure 2 is a schematic diagram of the structure of a frequency-hopping fountain code system, composed of figure 1 and figure 2 It can be seen that the bit information sent from the source is first encoded with fountain codes. In this embodiment, the type of fountain code is Raptor code, and LDPC code is used for precoding. Subsequently, the encoded signal is interleaved through a bit interleaver, and the interleaved bit information is sent to a modulator to generate a transmission modulation symbol, and then radio frequency modulation is performed through a frequency hopping modulator and sent to a wireless channel. In the process of frequency hopping modulation, it is first necessary to synthesize the corresponding frequency carrier according to the predetermined frequency hopping frequency table, and then modulate the information on the carrier. At the receiving end, the receiver first needs to perform frequency hopping synchronization, then synthe...

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 relates to a frequency-hopping fountain code system and a transmission method thereof, in particular to a transmission method of a frequency-hopping fountain code system introduced by a new interleaving technology, and belongs to the related technical fields of wireless communication systems, communication signal processing, and channel coding and decoding. The frequency hopping fountain code system in the present invention can transmit data when some frequency points are interfered and completely blocked, which enhances the reliability of the communication system in the bad channel environment. The present invention improves the bit error rate performance of the system by adopting bit interleaving coding and modulation technology. At the same time, because there is no increase in redundancy, the rate of information transmission will not be affected. The present invention adopts a bit-level interleaver, which can play the role of encryption when the enemy cannot obtain the interleaving rules, and improves the security of information transmission.

Description

technical field [0001] The invention relates to a frequency-hopping fountain code system and a transmission method thereof, in particular to a transmission method of a frequency-hopping fountain code system introduced by a new interleaving technology, and belongs to the related technical fields of wireless communication systems, communication signal processing, and channel coding and decoding. Background technique [0002] In today's increasingly fierce electronic warfare environment, how to transmit data safely and effectively in a complex and harsh channel environment interfered by the enemy is one of the hot spots in military communication research. The frequency hopping communication technology enables the radio frequency to hop in random order and speed. When the enemy cannot grasp the hopping rules, the transmitted information can be effectively prevented from being intercepted. For blocking broadband interference, some frequency points are interfered and cannot transm...

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): H04L1/00H04B1/713
Inventor 卜祥元卢继华张序琦
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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