Title :
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
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);
Conference_Titel :
Acoustics, Speech and Signal Processing (ICASSP), 2014 IEEE International Conference on
Conference_Location :
Florence
DOI :
10.1109/ICASSP.2014.6853617
