A Multi-Carrier Spread Spectrum Method Based on Fast Frequency Hopping

A multi-carrier, spread spectrum technology, applied in the field of multi-carrier spread spectrum technology, can solve the problems of code division multiple access, confidentiality and anti-interference without advantages

Inactive Publication Date: 2019-03-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary FFH-OFDM does not include spread spectrum, so it does not have advantages in code division multiple access, confidentiality, and anti-interference compared with traditional OFDM

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 Multi-Carrier Spread Spectrum Method Based on Fast Frequency Hopping
  • A Multi-Carrier Spread Spectrum Method Based on Fast Frequency Hopping
  • A Multi-Carrier Spread Spectrum Method Based on Fast Frequency Hopping

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] On the basis of the original MC-DS-CDMA technology, the present invention proposes a multi-carrier spread spectrum technology based on fast frequency hopping in combination with the FFH-OFDM technology. The specific steps of the scheme are as follows:

[0036] Transmitter part:

[0037] Step 1: Modulate the original signal, and the modulation method may be PSK or QAM.

[0038] Step 2, serial-to-parallel conversion, the modulated signal is serial-to-parallel converted into M channels of parallel signals.

[0039] Step 3, direct spread spectrum in the time domain, using the same spread spectrum sequence to carry out direct spread spectrum respectively on M parallel signals with the same spread spectrum code, such as shown.

[0040] Step 4: FFH mapping. The FFH mapping module performs fast frequency hopping on the signal according to the preset 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 belongs to the technical field of communication, and in particular relates to a multi-carrier spread spectrum technology based on multi-carrier direct sequence spread spectrum code division multiple access (MC-DS-CDMA) and FFH-OFDM. A multi-carrier spread spectrum method based on fast frequency hopping, which takes into account the common characteristics of MC-DS-CDMA and FFH-OFDM, avoids the weakness of traditional MC-DS-CDMA without frequency diversity gain, and is effective in anti-fading, It has certain advantages in anti-interference, code division multiple access, and communication confidentiality.

Description

technical field [0001] The invention belongs to the technical field of communication, in particular to a multi-carrier spread spectrum technology based on multi-carrier direct sequence spread spectrum code division multiple access (MC-DS-CDMA) and FFH-OFDM. Background technique [0002] With the development of OFDM and spread spectrum communication, a new communication technology - multi-carrier spread spectrum technology has emerged. This technology combines OFDM technology and spread spectrum technology, and takes into account the advantages of the two technologies in anti-multipath, anti-interference, code division multiple access, and confidentiality, and has become a hot spot in current communication technology research. According to its structure and the different forms of spread spectrum, it can be roughly divided into four types: MC-CDMA, MC-DS-CDMA, MT-CDMA, and two-dimensional spread spectrum technology. Among them, MC-DS-CDMA is a time-domain spread spectrum tech...

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): H04L27/26H04B1/7143
CPCH04B1/7143H04L27/2628H04L27/265
Inventor 窦衡王玄马晓双魏子棱蔡得泉
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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