Results 41 to 50 of about 46,930 (340)
Hybrid Visible Light and Ultrasound-Based Sensor for Distance Estimation
Sensors, 2017 Distance estimation plays an important role in location-based services, which has become very popular in recent years. In this paper, a new short range cricket sensor-based approach is proposed for indoor location applications.
Jose Rabadan +5 more
doaj +1 more source
Synthesis of visible-light-activated yellow amorphous TiO2 photocatalyst [PDF]
, 2008 Visible-light-activated yellow amorphous TiO2 (yam-TiO2) was synthesised by a simple and organic-free precipitation method. TiN, an alternative precursor for TiO2 preparation, was dissolved in hydrogen peroxide under acidic condition ( pH similar to 1 ...
Randorn, Chamnan +7 more
core +1 more source
Ultrasensitive bionic photonic-electronic skin with wide red-shift mechanochromic response
Light: Advanced ManufacturingMimicking animal skin is an effective strategy for enhancing the performance of artificial skin. Inspired by a chameleon’s iridophore and a spider’s slit organ, a novel photonic-electronic skin (PE-skin) with excellent optical/electrical dual-sensing ...
Tianqi Wang +11 more
doaj +1 more source
Indoor visible light communications: performance evaluation and optimization
EURASIP Journal on Wireless Communications and Networking, 2018 For indoor visible light communication (VLC), much work has been done when the noise is independent of the input signal. However, less effort is made when the VLC system suffers from the input-dependent noise.
Sheng-Hong Lin +3 more
doaj +1 more source
Phase-Aligned Physical-Layer Network Coding in Visible Light Communications
IEEE Photonics Journal, 2019 Deploying relay nodes in visible light communication (VLC) relieves the requirement of line-of-sight transmission and thus extends the service coverage of VLC systems.
Xun Guan +3 more
doaj +1 more source
Visible light communications in heterogeneous networks: pave the way for user-centric design
, 2015 At the time of writing, there is substantial research interest in the subject of Visible Light Communications (VLC) owing to its capability of offering significant traffic offloading potential in highly crowded Radio Frequency (RF) scenarios.
Wang, Jiaheng +5 more
core +1 more source
IEEE Open Journal of the Communications SocietyFrom an information-theoretic perspective, we investigate performance of asymmetrically clipped optical OFDM (ACO-OFDM) in intensity modulated optical wireless systems.
Xiaozhen Liu, Jing Zhou, Wenyi Zhang
doaj +1 more source
DC-Bias for Optical OFDM in Visible Light Communications
IEEE Access, 2019 The requirement of a DC-bias is known to make DC-biased optical orthogonal frequency division multiplexing (DCO-OFDM) less energy efficient. This can be improved by asymmetrically clipped optical OFDM (ACO-OFDM), pulse amplitude modulated OFDM (PAM-OFDM)
Xiong Deng +3 more
doaj +1 more source
Simultaneous transmission of audio and video signals using visible light communications
, 2013 A visible light communication system for parallel transmission of high-quality audio and video signals using illumination white and red light-emitting diodes (LEDs) is presented in this paper. For video transmission, we adopts the pulse width modulation (
Son, Do +13 more
core +1 more source
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