Low peak-to-average ratio wireless light transmission method with clipping moving

A technology of wireless optical transmission and peak-to-average ratio, applied in the field of wireless optical communication, can solve the problems of lower energy utilization, high spectrum utilization, and high peak-to-average ratio, and meet the requirements of improving receiving performance, simple implementation, and reducing linearity Effect

Active Publication Date: 2014-08-13
上海瀚芯实业发展合伙企业(有限合伙)
View PDF5 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The frequency domain symbols of DCO-OFDM also satisfy conjugate symmetry, but it does not require the value on even subcarriers to be 0, 1/2 subcarriers are used to transmit effective symbols, and the spectrum utilization rate is high, but it is used to make the time domain The signal is a positive value, and an additional DC bias needs to be added to the signal output by the IFFT, which reduces the energy utilization rate
[0004] The problem of too high peak-to-average ratio (PAPR) has always been the main shortcoming of the 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
  • Low peak-to-average ratio wireless light transmission method with clipping moving
  • Low peak-to-average ratio wireless light transmission method with clipping moving
  • Low peak-to-average ratio wireless light transmission method with clipping moving

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] A low peak-to-average ratio wireless optical transmission method using clipping and shifting, using the characteristic that one of the paired signals of the ACO-OFDM time domain signal must be 0, if the positive signal in the paired signal exceeds the set The threshold value is clipped, but the eliminated amount is not discarded directly, but placed in the position of 0 in this paired signal, so as to reduce the effect of PAPR, and at the same time, it does not cause too much damage to the communication reliability. big damage. The method is simple to implement, and the improvement of PAPR reduces the system's requirements on the linearity of power amplifiers and LED lamps, reduces the nonlinear distortion of signals in the electrical and optical domains, and improves the system receiving performance. The concrete realization of this method comprises the follow...

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 low peak-to-average ratio wireless light transmission method with clipping moving. The feature that one of paring signals in ACO-OFDM time domain signals must be zero is utilized, if a positive signal in the pairing signals exceeds the set threshold value, clipping is conducted on the positive signal, and the clipped quantity is put at the zero position in the paring signals, and therefore the function of reducing the PAPR is achieved. The low peak-to-average ratio wireless light transmission method is easy to achieve, the PARP of an ACO-OFDM wireless optical communication system can be effectively reduced, system power consumption is reduced, the requirement for the linearity of a power amplifier and an LED lamp is lowered, nonlinear distortion of the signals in electricity and light domains is reduced, and therefore the receiving performance of the system is improved.

Description

technical field [0001] The invention relates to a low peak-to-average ratio wireless optical transmission method using clipping and shifting, which belongs to the wireless optical communication technology. Background technique [0002] Wireless Optical Communication (OWC) has attracted the attention of researchers in the field of communication due to its rich and unrestricted spectrum resources, high transmission power can improve the acceptance signal-to-noise ratio, low electromagnetic radiation level, and good security, and has gradually become a research hotspot. . In order to improve the transmission rate of the wireless optical communication system and combat multipath interference, the OFDM modulation method was introduced. The researchers found that OFDM is an effective way to improve the performance of the wireless optical communication system from theory and experiments. [0003] Since the current wireless optical communication system generally adopts intensity mo...

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
CPCY02B60/50H04L27/26
Inventor 许威吴满张华
Owner 上海瀚芯实业发展合伙企业(有限合伙)
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