Amplitude limiting method for reducing PAPR in OFDM system on basis of quantification theory

A quantization theory and clipping technology, applied in the direction of multi-frequency code system, etc., can solve the problem of high bit error rate of clipping method, achieve the effect of small nonlinear change, reduce bit error rate, and low computational complexity

Inactive Publication Date: 2014-04-16
UNIV OF SCI & TECH BEIJING
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of clipping method that reduces PAPR in the OFDM sys

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
  • Amplitude limiting method for reducing PAPR in OFDM system on basis of quantification theory
  • Amplitude limiting method for reducing PAPR in OFDM system on basis of quantification theory
  • Amplitude limiting method for reducing PAPR in OFDM system on basis of quantification theory

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0035] Such as figure 1 As shown, a kind of limiting method that the present invention provides reduces PAPR in the OFDM system based on quantization theory, comprises:

[0036] S11: performing multi-carrier modulation on the input signal;

[0037] S12: Determine several quantization clipping sub-intervals;

[0038]S13: Perform quantization and clipping on each multi-carrier modulated input signal according to the quantization and clipping subinterval to which the amplitude of each multi-carrier modulated input signal belongs, to obtain a quantization and clipping information sequence;

[0039] S14: Send the quantized and limited information sequence to the receiving end through the wireless channel, and the receiving end uses this sequence to directly...

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 provides an amplitude limiting method for reducing a PAPR in an OFDM system on the basis of a quantification theory and relates to the field of orthogonal frequency-division multiplexing communication. The amplitude limiting method is used for solving the problem that an amplitude limiting method at present is too high in error rate. The amplitude limiting method is based on the quantification theory, a principle of the amplitude limiting method is utilized, and a plurality of quantized values are set according to amplitude differences of input signals so as to achieve the goal of amplitude limiting. The method is improved on the basis of a traditional amplitude limiting method, is simple to apply, can effectively reduce the PAPR in the OFDM system and is low in computation complexity. In addition, the quantification theory is applied to the amplitude limiting method; compared with the traditional amplitude limiting method, non-linear variations of signals are smaller, original input signals can be correctly recovered at a receiving end, and the error rate of the OFDM system can be remarkably reduced while PAPR performance reduction is guaranteed.

Description

technical field [0001] The invention relates to the field of Orthogonal Frequency Division Multiplexing (OFDM) communication, in particular to a limiting method for reducing PAPR in an OFDM system based on quantization theory. Background technique [0002] Orthogonal frequency division multiplexing OFDM is a multi-carrier modulation technology. Its basic idea is to distribute high-speed data information streams to several sub-channels with lower transmission rates through serial / parallel conversion. Since the data information to be transmitted is distributed to each subcarrier, the duration of each symbol is greatly increased, making the symbol period of the OFDM signal longer than the multipath delay, so it has a very good ability to resist ISI. In addition, OFDM technology utilizes the time-frequency orthogonality of signals to allow partial overlap of sub-channel spectrum, which nearly doubles the spectrum utilization. Based on these advantages, OFDM technology is widely...

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
IPC IPC(8): H04L27/26
Inventor 何振王建萍颜晶刘俊文
Owner UNIV OF SCI & TECH BEIJING
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