Advantage of CAP Signaling for VLC Systems Under Non-Linear LED Characteristics

We consider the use of carrier-less amplitude and phase (CAP) modulation together with frequency-domain equalization (FDE)for high-speed data transmission in indoor visible-light communication systems and investigate the suitability of this transmission scheme under non-linear LED characteristics, w...

Full description

Saved in:
Bibliographic Details
Published in2019 2nd West Asian Colloquium on Optical Wireless Communications (WACOWC) pp. 21 - 25
Main Authors Long, Shihe, Ali Khalighi, Mohammad
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.04.2019
Subjects
Carrier-less amplitude and phase modulation
Complexity theory
DCO-OFDM
Frequency-domain analysis
Frequency-domain equalization
LED non-linearity
Light emitting diodes
Linear systems
Nonlinear optics
Optical distortion
Optical transmitters
Visible-light communications
Online AccessGet full text

Cover

More Information
Summary:We consider the use of carrier-less amplitude and phase (CAP) modulation together with frequency-domain equalization (FDE)for high-speed data transmission in indoor visible-light communication systems and investigate the suitability of this transmission scheme under non-linear LED characteristics, which has to be dealt with in practical implementations of these networks. We focus on the non-linear characteristic of the LED within its dynamic-range, while neglecting the effect of upper signal clipping which has been subject of extensive research so far. The LED is modeled by the Hammerstein model, which consists of a linear time-invariant system followed by a memoryless non-linear part. Through Monte-Carlo simulations we show that, for a given spectral efficiency, the CAP-FDE scheme suffers less from LED non-linearity in terms of electrical power, as compared with the classical DC-biased optical orthogonal-frequency-division-multiplexing.
DOI:10.1109/WACOWC.2019.8770002