Abstract
The rising need of indoor broadband services without increasing the
electromagnetic pollution has led the scientific community to look for smart spectrum
usage. From this, it stems the need of emerging paradigm of visible light
communications. In the context of the IEEE 802.15.7 Task Group activities, a new
modulation format named color shift keying (CSK), based on sending signals spaced in the
domain of the wavelength and able to both support the communication and the illumination
of indoor environments, has been proposed. In this paper, we propose a
transmission/reception scheme based on CSK modulation that also makes use of a
modulation format that descends from the pulse position modulation by taking care of
illumination level to be granted. The aim of this contribution is twofold: to propose
the receiver architecture for that kind of transmission and to evaluate its performance
by performing also comparisons with other contributions in the literature. The proposed
scheme is robust with respect to optical interference and presents high rate and low bit
error rate at the cost of a limited increasing of complexity of the receiver with
respect to other approaches.
© 2014 IEEE
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