Results 21 to 30 of about 5,804 (248)

Indoor 3-Dimensional Visible Light Positioning Based on Smartphone Camera: Error Metric and LED Layout Optimization

open access: yesIEEE 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

Underwater Optical Wireless Communication

open access: yesIEEE Access, 2016
Underwater wireless information transfer is of great interest to the military, industry, and the scientific community, as it plays an important role in tactical surveillance, pollution monitoring, oil control and maintenance, offshore explorations, climate change monitoring, and oceanography research.
Hemani Kaushal, Georges Kaddoum
openaire   +2 more sources

Optimal Transmission of VLC System in the Presence of LED Nonlinearity and APD Module Saturation

open access: yesIEEE 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

Flip-OFDM for optical wireless communications

open access: yes2011 IEEE Information Theory Workshop, 2011
published in IEEE Information Theory Workshop, Paraty Brazil, Sept ...
Nirmal Fernando   +2 more
openaire   +3 more sources

Enhanced System Acquisition for NB-IoT

open access: yesIEEE 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

Preliminary Characterization of Coverage for Water-to-Air Visible Light Communication Through Wavy Water Surface

open access: yesIEEE 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

Multiuser Diversity Over Parallel and Hybrid FSO/RF Links and Its Performance Analysis

open access: yesIEEE Photonics Journal, 2016
Hybrid free-space optical (FSO)/radio-frequency (RF) communication has emerged as an effective solution for high-data-rate wireless transmission. In this paper, multiuser diversity over parallel and hybrid FSO/RF links is discussed.
Li Chen, Weidong Wang, Chi Zhang
doaj   +1 more source

Multipath Extraction Based UL/DL Channel Estimation for FDD Massive MIMO-OFDM Systems

open access: yesIEEE Access, 2021
In this paper, we propose a multipath extraction based uplink/downlink channel estimation scheme for wideband massive multiple-input multiple-output (MIMO) systems, where orthogonal frequency division multiplexing (OFDM) is adopted and the beam squint ...
Wei Ji, Feng Zhang, Ling Qiu
doaj   +1 more source

Optical wireless communications for micromachines

open access: yesSPIE Proceedings, 2006
A key challenge for wireless sensor networks is minimizing the energy required for network nodes to communicate with each other, and this becomes acute for self-powered devices such as 'smart dust'. Optical communications is a potentially attractive solution for such devices.
O'Brien, D   +6 more
openaire   +2 more sources

Overview of Vehicle Optical Wireless Communications [PDF]

open access: yesIEEE Access, 2020
Effective information transmission between vehicles has become one of the solutions to improve road safety. Based on the huge advantages of optical wireless data transmission technology, this article summarizes the research status of unmanned vehicles in optical wireless communication (OWC).
Hongye Mei   +4 more
openaire   +2 more sources

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