Results 31 to 40 of about 84,402 (283)
IEEE Photonics Journal, 2022 We consider 3-dimensional (3D) visible light positioning (VLP) based on smartphone camera in an indoor scenario. Based on the positioning model in the quantized pixel-domain, we characterize the 3D normalized positioning error metric (NPEM) through the ...
Jiaojiao Xu, Nuo Huang, Chen Gong
doaj +1 more source
Spectrum-Efficient Triple-Layer Hybrid Optical OFDM for IM/DD-Based Optical Wireless Communications [PDF]
, 2020 In this paper, a triple-layer hybrid optical orthogonal frequency division multiplexing (THO-OFDM) for intensity modulation with direct detection (IM/DD) systems with a high spectral efficiency is proposed.
Ghassemlooy, Zabih +5 more
core +2 more sources
Optical wireless communication systems [PDF]
Optik, 2017 The emerging field of optical wireless communication (OWC) systems is seen as potential complementary technology to the radio frequency wireless communications in certain applications. It is deemed as a possible technology in the future 5th Generation communication networks to address the spectrum congestion and improve the system's capacity.
Ghassemlooy, Zabih +5 more
openaire +3 more sources
Resonant tunneling diode oscillators for optical communications [PDF]
, 2017 The ability to use resonant tunneling diodes (RTDs) as both transmitters and receivers is an emerging topic, especially with regards to wireless communications. Successful data transmission has been achieved using electronic RTDs with carrier frequencies
Al-Khalidi, Abdullah +7 more
core +2 more sources
Wavelet—Artificial Neural Network Receiver for Indoor Optical Wireless Communications [PDF]
, 2011 The multipath induced intersymbol interference (ISI) and fluorescent light interference (FLI) are the two most important system impairments that affect the performance of indoor optical wireless communication (OWC) systems.
Angelova, Maia +2 more
core +1 more source
Multi-user indoor optical wireless communication system channel control using a genetic algorithm [PDF]
, 2011 A genetic algorithm controlled multispot transmitter is demonstrated that is capable of optimising the received power distribution for randomly aligned single element receivers in multiple fully diffuse optical wireless communications systems with ...
Green, Roger +3 more
core +1 more source
IEEE Photonics Journal, 2021 In this paper, we establish a water-to-air (W2A) visible light communication (VLC) link using green light emitting diode (LED), and investigate the coverage characteristics of the designed W2A-VLC link under calm and wavy water conditions.
Tianrui Lin +4 more
doaj +1 more source
Optimal Transmission of VLC System in the Presence of LED Nonlinearity and APD Module Saturation
IEEE Photonics Journal, 2018 We address the optimal transmission of LED-based visible light communication (VLC) system using direct current biased optical orthogonal frequency division multiplexing (DCO-OFDM) modulation and avalanche photodiode (APD) receiver.
Meijun Gao, Chao Li, Zhengyuan Xu
doaj +1 more source
Cellular Underwater Wireless Optical CDMA Network: Potentials and Challenges [PDF]
, 2016 Underwater wireless optical communications is an emerging solution to the expanding demand for broadband links in oceans and seas. In this paper, a cellular underwater wireless optical code division multiple-access (UW-OCDMA) network is proposed to ...
Akhoundi, Farhad +5 more
core +2 more sources
Enhanced System Acquisition for NB-IoT
IEEE Access, 2017 Machine-type communication (MTC) is the key technology to support data transfer among devices (sensors and actuators) in Internet of Things (IoT).
Wenjie Yang +6 more
doaj +1 more source