Results 31 to 40 of about 109,277 (295)

Accurate Underwater Optical Wireless Communication Model With Both Line-of-Sight and Non-Line-of-Sight Channels

open access: yesIEEE Photonics Journal, 2022
Underwater optical wireless communication (UOWC) systems have been widely studied to achieve high-speed wireless communications. To investigate and design UOWC systems, a mathematical model to characterize the accurate performance of UOWC systems is ...
Chengwei Fang, Shuo Li, Ke Wang
doaj   +1 more source

A line-of-sight optimised MIMO architecture for outdoor environments [PDF]

open access: yes, 2006
The authors present an investigation on the capacity of Line-of-Sight (LoS) optimised and conventional (narrow-spaced) Multiple-Input Multiple-Output (MIMO) communication systems in outdoor environments. Under a LoS scenario, the channel is normally rank
Sarris, I   +4 more
core   +1 more source

Efficient Non-Line-of-Sight Imaging from Transient Sinograms [PDF]

open access: yes, 2020
Non-line-of-sight (NLOS) imaging techniques use light that diffusely reflects off of visible surfaces (e.g., walls) to see around corners. One approach involves using pulsed lasers and ultrafast sensors to measure the travel time of multiply scattered ...
Matthew O'Toole (14045517)   +4 more
core   +1 more source

Karakterisasi nRF24L01+ dengan Kondisi Line of Sight dan Non-Line of Sight untuk Sistem Monitoring Bencana Banjir [PDF]

open access: yes, 2022
Penelitian tentang karakteriasasi nRF2L01+ dengan kondisi line of sight dan non-line of sight untuk sistem monitoring bencana banjir. Penelitian dilakukan untuk melihat kemampuan transceiver nRF24L01+ dalam menstranmisikan data untuk sistem monitoring ...
Costrada, Aldo Novaznursyah   +2 more
core   +1 more source

Personal area networks with line-of-sight MIMO operation [PDF]

open access: yes, 2006
In this paper, the results of an on-body, line-of-sight (LOS), multiple-input, multiple-output (MIMO) channel sounding investigation are reported. Transmission takes place between on-body antennas and a uniform linear array, positioned at close range and
Williams, C   +3 more
core   +1 more source

Performance analysis of coverage probability in ultra-dense small cell networks based on fractional frequency reuse

open access: yes上海师范大学学报. 自然科学版, 2017
Based on stochastic geometry theory and probability theory,a fractional frequency reuse strategy was proposed to improve user communication quality by differentiating line-of-sight propagation from non-line-of-sight propagation in ultra-dense small cell ...
Wang Yuwei, Ge Jia, Yu Hui
doaj   +1 more source

A mobile localization method based on a robust extend Kalman filter and improved M-estimation in Internet of things

open access: yesInternational Journal of Distributed Sensor Networks, 2020
As the key technology for Internet of things, wireless sensor networks have received more attentions in recent years. Mobile localization is one of the significant topics in wireless sensor networks.
Nan Hu   +5 more
doaj   +1 more source

Capacity evaluation of LoS-optimised and standard MIMO antenna arrays at 5.2 GHz [PDF]

open access: yes, 2007
In this paper, the channel capacity of MIMO communication systems is evaluated from measurements in a home environment at 5.2 GHz. The capacity performance of a novel line-of-sight (LoS)-optimised antenna array architecture is investigated and compared ...
Sarris, I   +3 more
core   +1 more source

Scannerless non-line-of-sight three dimensional imaging with a 32x32 SPAD array [PDF]

open access: yes, 2020
We develop a scannerless non-line-of-sight three dimensional imaging system based on a commercial 32x32 SPAD camera combined with a 70 ps pulsed laser.
Meng Tang (139012)   +6 more
core   +1 more source

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