NDLI: Non-linear companding transform for DCO-OFDM-based VLC systems

Content Provider	IET Digital Library
Author	Xin, Duqiang Xu, Qiang Qiao, Shuang Zhang, Tian
Abstract	In this study, a novel non-linear companding transform (NCT) is proposed for the DC-biased optical orthogonal frequency division multiplexing (DCO-OFDM) based visible light communications (VLC). The authors lower the peak-to-average power ratio (PAPR) of the original DCO-OFDM signals to mitigate the transmission performance degradation induced by the non-linearity of the light-emitting diodes (LEDs) transmitter. Firstly, the positive and negative amplitudes of the original DCO-OFDM signals are separated into two groups. Then, the group with the maximum peak is first processed with a given compress coefficient u 1 and power compensation coefficient c. After that, another coefficient u 2 is calculated by the emission power conservation criteria to further compress the rest group. Finally, these two groups of amplitude samples are combined together before adding a suitable DC bias for driving LEDs. As the mean power is not changed, a PAPR reduction can be obviously realised by the proposed NCT scheme.
Starting Page	1110
Ending Page	1114
Page Count	5
ISSN	17518628
Volume Number	13
e-ISSN	17518636
Issue Number	Issue 8, May (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/13/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2018.5864
Journal	IET Communications
Publisher Date	2019-02-13
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	DC-biased Optical Orthogonal Frequency Division DCO-OFDM-based VLC System Emission Power Conservation Criteria Given Compress Coefficient Light Emitting Diode Light-emitting Diode Transmitter Modulation And Coding Method Negative Amplitudes Nonlinearity Novel Nonlinear Companding OFDM Modulation Optical Communication Original DCO-OFDM Signal Peak-to-average Power Ratio Positive Amplitudes Power Compensation Coefficient Statistics Suitable DC Bias Transmission Performance Degradation
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Alleviation of LED nonlinearity impact in visible light communication using companding and predistortion

LED non-linearity mitigation techniques for optical OFDM-based visible light communications

An Optimum DC-Biasing for DCO-OFDM System

Near-Optimal Low-Complexity Sequence Detection for Clipped DCO-OFDM

Cubic Metric Reduction for DCO-OFDM Visible Light Communication Systems

6.915-Gbit/s white-light phosphor laser diode-based DCO-OFDM visible light communication (VLC) system with functional transmission distance

LED nonlinearity mitigation techniques in optical wireless OFDM communication systems

An Experimental Comparison of Different Bit-and-Power-Allocation Algorithms for DCO-OFDM

Offset and Power Optimization for DCO-OFDM in Visible Light Communication Systems

Non-linear companding transform for DCO-OFDM-based VLC systems

Similar Documents

Alleviation of LED nonlinearity impact in visible light communication using companding and predistortion

LED non-linearity mitigation techniques for optical OFDM-based visible light communications

An Optimum DC-Biasing for DCO-OFDM System

Near-Optimal Low-Complexity Sequence Detection for Clipped DCO-OFDM

Cubic Metric Reduction for DCO-OFDM Visible Light Communication Systems

6.915-Gbit/s white-light phosphor laser diode-based DCO-OFDM visible light communication (VLC) system with functional transmission distance

LED nonlinearity mitigation techniques in optical wireless OFDM communication systems

An Experimental Comparison of Different Bit-and-Power-Allocation Algorithms for DCO-OFDM

Offset and Power Optimization for DCO-OFDM in Visible Light Communication Systems

Non-linear companding transform for DCO-OFDM-based VLC systems