Carrierless amplitude and phase modulation in wireless visible light communication systems

Abstract

<jats:p>Visible light communications (VLCs) have attracted considerable interest in recent years owing to the potential to simultaneously achieve data transmission and illumination using low-cost light-emitting diodes (LEDs). However, the high-speed capability of such links is typically limited by the low bandwidth of LEDs. As a result, spectrally efficient advanced modulation formats have been considered for use in VLC links in order to mitigate this issue and enable higher data rates. Carrierless amplitude and phase (CAP) modulation is one such spectrally efficient scheme that has attracted significant interest in recent years owing to its good potential and practical implementation. In this paper, we introduce the basic features of CAP modulation and review its use in the context of indoor VLC systems. We describe some of its attributes and inherent limitations, present related advances aiming to improve its performance and potential and report on recent experimental demonstrations of LED-based VLC links employing CAP modulation.</jats:p> <jats:p>This article is part of the theme issue ‘Optical wireless communication’.</jats:p>

Optical wireless communication

“…CAP allows the transmission of high-order modulation symbols while maintaining the basic requirements of time domain IM/DD signals. This theme issue includes an overview article on CAP [32] by Bamiedaksis et al, who have been leading the development and implementation of CAP techniques for optical communication systems.…”

Visible Light Positioning as a Next-Generation Indoor Positioning Technology: A Tutorial

“…The typical single carrier (SC) methods, variable on-off keying ((V)OOK), pulse-width modulation (PWM), pulseamplitude modulation (PAM), carrierless amplitude phase modulation (CAP) [283], discrete Fourier transform (DFT)spread (DFT-s) orthogonal frequency division multiplexing (OFDM), variable pulse-position modulation ((V)PPM) and (single) edge position modulation ((S)EPM) [284], [285] are all quasi-directly applicable for VLP. They may even be more suited for light than radio wave carriers due to the more limited multipath interference experienced.…”

Visible light communication (VLC) using Internet of Things (IoT) in Dark Light system for Smart Room

“…Visible light communication (VLC) or Light Fidelity (Li-Fi) have attracted a great interest in latest years in order to overcome the limited spectrum in radio frequency (RF) communications to fulfill the expanding interest for rapid communication interfaces between electronics and sensors, and to empower the vision of a profoundly interconnected world like Internet of Things (IoT), smart cities, smart homes and smart room (Bamiedakis et al 2020).…”