Results 1 to 10 of about 5,261,506 (225)
Dimmable Visible Light Communications Based on Multilayer ACO-OFDM
IEEE Photonics Journal, 2016 This paper proposes a dimmable scheme for a visible light communication (VLC) system based on multilayer asymmetrically clipped optical orthogonal frequency-division multiplexing (ACO-OFDM), which is able to support a wide dimming range for different ...
Qi Wang +3 more
doaj +1 more source
Asymmetrically Reconstructed Optical OFDM for Visible Light Communications
IEEE Photonics Journal, 2016 In conventional optical orthogonal frequency-division multiplexing (OOFDM) systems, such as pulse-amplitude-modulated discrete multitone (PAM-DMT) and asymmetrically clipped optical OFDM (ACO-OFDM), half of the time-domain transmitted signals carry ...
Jindan Xu, Wei Xu, Hua Zhang, Xiaohu You
doaj +1 more source
Channel Modeling and Characterization for Visible Light Communications
IEEE Photonics Journal, 2015 In this paper, we present a comprehensive channel modeling and characterization study for visible light communications. Our study is based on ray tracing, which allows for an accurate description of the interaction of rays emitted from the lighting ...
Farshad Miramirkhani, Murat Uysal
doaj +1 more source
Faster-Than-Nyquist Non-Orthogonal Frequency-Division Multiplexing for Visible Light Communications
IEEE Access, 2018 In this paper, we propose a faster-than-Nyquist non-orthogonal frequency-division multiplexing (NOFDM) scheme for visible light communications (VLCs) where the multiplexing/demultiplexing employs the inverse fractional cosine transform (IFrCT)/FrCT ...
Ji Zhou +8 more
doaj +1 more source
Rate Maximization for Downlink Multiuser Visible Light Communications
IEEE Access, 2016 We are interested in optimizing transmit beamforming for a visible light communication multiuser system such that the achievable sum rate is maximized. We first derive a closed-form sum rate expression via information-theoretic tools.
Hong Shen +3 more
doaj +1 more source
Efficient Channel Coding for Dimmable Visible Light Communications System
IEEE Access, 2020 Visible light communication (VLC) offers wireless communication within short-range based on wavelength converters and light-emitting diode (LED). In the VLC system, conventional forward error correction (FEC) codes are not guaranteed to provide flicker ...
Oluwaseyi Paul Babalola, Vipin Balyan
doaj +1 more source
Multi-User Visible Light Communications: State-of-the-Art and Future Directions
IEEE Access, 2018 Visible light communications (VLC) builds upon the dual use of existing lighting infrastructure for wireless data transmission. VLC has recently gained interest as cost-effective, secure, and energy-efficient wireless access technology particularly for ...
Saad Al-Ahmadi +3 more
doaj +1 more source
Mobile User Connectivity in Relay-Assisted Visible Light Communications
Sensors, 2018 In this paper, we investigate relay-assisted visible light communications (VLC) where a mobile user acts as a relay and forwards data from a transmitter to the end mobile user.
Petr Pešek +5 more
doaj +1 more source
Sensors, 2022 Current developments and the need for high-performance devices that provide safe and reliable communications present a future perspective by using visible light as an alternative solution that can substantially improve road and pedestrian safety.
Eduard Zadobrischi
doaj +1 more source
Resource Allocation for Hybrid Visible Light Communications (VLC)-WiFi Networks
IEEE Access, 2020 Visible Light Communication (VLC) is becoming a promising technology of wireless communication, due to high data rate, low cost, and immunity to Radio Frequency (RF) interference.
Liwei Yang +4 more
doaj +1 more source