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

Method for reducing peak-to-average ratio of asymmetric truncated orthogonal frequency division multiplexing signal

A signal and anti-symmetric technology, applied in the direction of multi-frequency code system, etc., can solve problems affecting system transmission performance, high peak-to-average ratio, nonlinear effect of optical fiber and unsatisfactory linearity of power amplifier, etc.

Inactive Publication Date: 2014-12-17
BEIJING UNIV OF POSTS & TELECOMM
View PDF2 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] High PAPR is one of the main defects of the OFDM system, which brings nonlinear damage to optical and electrical domain signals, such as fiber nonlinear effects and unsatisfactory linearity of power amplifiers, which seriously affects the transmission performance of the system
In the process of realizing the present invention, the inventors found that there is a problem of high peak-to-average ratio (PAPR) in ACO-OFDM technology

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
  • Method for reducing peak-to-average ratio of asymmetric truncated orthogonal frequency division multiplexing signal
  • Method for reducing peak-to-average ratio of asymmetric truncated orthogonal frequency division multiplexing signal
  • Method for reducing peak-to-average ratio of asymmetric truncated orthogonal frequency division multiplexing signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] figure 1 In order to use the DHT precoding method to reduce the PAPR based on the DHT ACO-OFDM system, the formulas of IDHT and DHT are defined as:

[0011] x n = 1 N Σ k = 0 N - 1 X k cas ( 2 πkn / N ) , 0 ≤ n ≤ N - 1 - - - ( 1 )

[0012] x k = 1 N Σ k = 0 N - 1...

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 method for reducing a peak-to-average ratio by a DHT (Discrete Hartley Transform) precode, applicable to an ACO-OFDM system based on DHT, and belongs to the technical field of photo-communication. The DHT precode is introduced into the ACO-OFDM system based on DHT, signals do not loss; as the DHT algorithm is low in complexity, and PAPR of the system can be greatly reduced by only slightly adding implementation complexity of the system. The method is applicable to the systems with strict requirements on cost and implementation complexity, such as passive optical networks, indoor optical wireless communication, interconnection among data centers and the like.

Description

technical field [0001] The invention belongs to the field of high-speed optical communication, in particular to a method for reducing the peak-to-average ratio of an asymmetric truncated orthogonal frequency division multiplexing signal. Background technique [0002] With the development of Internet technology and the vigorous development of various video services, the capacity requirements of optical transmission and access systems are also increasing. In order to meet the ever-increasing capacity requirements of optical transmission systems, optical OFDM (O-OFDM) technology has been extensively studied in recent years. O-OFDM technology has the advantages of high spectral efficiency, strong ability to resist dispersion and polarization mode dispersion, etc. O-OFDM technology is divided into two categories: coherent OFDM system and intensity modulation-direct detection OFDM (IM / DD O-OFDM) system. Among them, the IM / DD O-OFDM system has a simple structure and low implement...

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): H04L27/26
Inventor 乔耀军周骥蔡浞彭永清
Owner BEIJING UNIV OF POSTS & TELECOMM
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