Distributions of upper PAPR and lower PAPR of OFDM signals in visible light communications

Author

Zhenhua Yu ; Baxley, Robert J. ; Zhou, G. Tong

Author_Institution

Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA

fYear

2014

fDate

4-9 May 2014

Firstpage

355

Lastpage

359

Abstract

Orthogonal frequency-division multiplexing (OFDM) in visible light communications (VLC) inherits the disadvantage of high peak-to-average power ratio (PAPR) from OFDM in radio frequency (RF) communications. The upper peak power and lower peak power of real-valued VLC-OFDM signals are both limited by the dynamic constraints of light emitting diodes (LEDs). The efficiency and transmitted electrical power are directly related with the upper PAPR (UPAPR) and lower PAPR (LPAPR) of VLC-OFDM. In this paper, we will derive the complementary cumulative distribution function (CCDF) of UPAPR and LPAPR, and investigate the joint distribution of UPAPR and LPAPR.

Keywords

OFDM modulation; light emitting diodes; optical communication; CCDF; LED; OFDM signals; VLC; complementary cumulative distribution function; dynamic constraints; electrical power; light emitting diodes; lower PAPR; orthogonal frequency division multiplexing; peak-to-average power ratio; radio frequency communications; upper PAPR; visible light communications; Dynamic range; Joints; Light emitting diodes; Peak to average power ratio; Time-domain analysis; Wireless communication; Visible light communications (VLC); orthogonal frequency-division multiplexing (OFDM); peak-to-average power ratio (PAPR);

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing (ICASSP), 2014 IEEE International Conference on

Conference_Location

Florence

Type

conf

DOI

10.1109/ICASSP.2014.6853617

Filename

6853617