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

Peak-to-average ratio method of suppression signal based on ace algorithm

A signal peak-to-average ratio and algorithm technology, applied in the modulation carrier system, digital transmission system, electrical components, etc., can solve the problems of reduced ratio, insufficient signal peak gain, and increased system iterative complexity, so as to improve the suppression effect and widely Applications and systems achieve low-complexity effects

Active Publication Date: 2020-02-07
XIDIAN UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the system signal peak-to-average ratio PAPR suppression process needs to go through multiple iterations, and the least square estimation method needs to be used in each iteration process, and the use of multiple iterations and the least square estimation method has increased System iteration complexity
The disadvantage of this method is that as the order of Quadrature Amplitude Modulation (QAM) at the transmitter increases in practice, the proportion of frequency-domain constellation points participating in constellation expansion to all constellation points decreases, especially for 64QAM and above High-order M-QAM modulated OFDM system, signal peak-to-average ratio PAPR suppression gain is insufficient

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
  • Peak-to-average ratio method of suppression signal based on ace algorithm
  • Peak-to-average ratio method of suppression signal based on ace algorithm
  • Peak-to-average ratio method of suppression signal based on ace algorithm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings.

[0042] Refer to attached figure 1 , to further describe the specific steps of the present invention.

[0043] Step 1, modulate the bit stream.

[0044] Perform quadrature amplitude modulation on the binary bit stream output by the digital modulator at the transmitting end of the OFDM system to obtain a serial signal.

[0045]The quadrature amplitude modulation refers to selecting the quadrature modulation order that meets the requirements of transmission reliability according to the quality of the transmission channel of the OFDM system. The optional modulation orders of the binary bit stream to be modulated are 16-QAM, 64-QAM, and 256-QAM.

[0046] Step 2, change the transmission mode.

[0047] Serial signals are converted to parallel signals through a serial-to-parallel converter.

[0048] Step 3, upsampling the parallel signal.

[0049] The parallel signals ar...

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 method for suppressing a signal peak-to-average ratio based on an active constellation extension ACE algorithm in an OFDM system for mainly solving the problem that the signal peak-to-average ratio in an orthogonal frequency division multiplexing OFDM system in the prior art is too high. The specific steps comprise: (1) modulating a bit stream; (2) transforming a transmission mode; (3) performing upsampling on a parallel signal; (4) clipping a frequency domain signal to obtain clipping noise; (5) defining a scalable range of a constellation point (6) performing activeconstellation extension ACE on the frequency domain signal; (7) correcting the preliminarily extended frequency domain signal; and (8) sending a frequency domain transmission signal. The method disclosed by the invention has the advantages of being suitable for the OFDM system of a high-order orthogonal amplitude modulation and having low implementation complexity, and the power utilization rateof a communication system transmitter is improved.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a method for suppressing peak-to-average ratio of signals based on an ACE (active constellation extension) algorithm in the technical field of wireless communication. The present invention can be used in an Orthogonal Frequency Division Multiplexing (OFDM) system of wireless communication, expands the signal constellation points of the sending end of the system, and realizes signal peak-to-average power ratio PAPR (Peak-to-Average PowerRatio) suppression In order to avoid signal distortion and system power efficiency loss caused by working in the non-linear range when the peak-to-average ratio signal passes through the power amplifier. Background technique [0002] In wireless communication, compared with single-carrier system, OFDM system with multi-carrier has higher transmission efficiency and spectrum efficiency. OFDM technology has been widely used in the field o...

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): H04L27/26
CPCH04L27/2614H04L27/2623H04L27/2697
Inventor 王勇柳静雅田阗宫丰奎张南
Owner XIDIAN UNIV
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