A study of LED nonlinearity effects on optical wireless transmission using OFDM
- 1 April 2009
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- No. 18113923,p. 1-5
- https://doi.org/10.1109/wocn.2009.5010576
Abstract
Orthogonal frequency division multiplexing (OFDM) is a promising technique to realize high-speed indoor optical wireless (OW) links through the exploitation of the high peak-to-average power ratio (PAPR) for intensity modulation (IM). However, non-linear distortions in the transmission chain can significantly compromise the performance of OFDM as they incur inter-channel interference. The light emitting diode (LED) is the main source for such distortions due to its nonlinear behavior. Distortion levels can be controlled when the LED operates in a quasi-linear segment of its characteristic around a bias point. The severity of non-linear distortions and the dependence of the bias point on the chosen digital modulation scheme are analyzed in this paper. In this context, the bit-error performance is determined as a function of the bias point and the applied power back-offs.Keywords
This publication has 15 references indexed in Scilit:
- OFDM Visible Light Wireless Communication Based on White LEDsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2007
- Accurate estimation of digital communication system metrics - SNR, EVM and ρ in a nonlinear amplifier environmentPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2006
- Visible light communication using OFDMPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2006
- OFDM over indoor wireless optical channelIEE Proceedings - Optoelectronics, 2005
- Synchronization schemes for packet OFDM systemPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2004
- Modeling of nondirected wireless infrared channelsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Indoor visible communication utilizing plural white LEDs as lightingPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- A theoretical characterization of nonlinear distortion effects in OFDM systemsIEEE Transactions on Communications, 2000
- Effects of clipping and filtering on the performance of OFDMIEEE Communications Letters, 1998
- A technique for orthogonal frequency division multiplexing frequency offset correctionIEEE Transactions on Communications, 1994