Results 1 to 10 of about 387 (179)
Addressing Multi-User Interference in Vehicular Visible Light Communications: A Brief Survey and an Evaluation of Optical CDMA MAC Utilization in a Multi-Lane Scenario [PDF]
Sensors, 2023 Visible Light Communications (VLC) are developing as an omnipresent solution for inter-vehicle communications. Based on intensive research efforts, the performance of vehicular VLC systems has significantly improved in terms of noise resilience ...
Emmanuel Plascencia +5 more
doaj +2 more sources
Information Leakage Rate of Optical Code Division Multiple Access Network Using Wiretap Code [PDF]
Entropy, 2023 Secrecy capacity is usually employed as the performance metric of the physical layer security in fiber-optic wiretap channels. However, secrecy capacity can only qualitatively evaluate the physical layer security, and it cannot quantitatively evaluate ...
Rongwo Xu +4 more
doaj +2 more sources
Electron-Mediator-Free Microfluidic Photocatalytic Coenzyme Regeneration with 100% Conversion Efficiency within 126 S. [PDF]
Adv Sci (Weinh)Discover a groundbreaking mediator‐free photocatalytic method for coenzyme NAD(P)H regeneration using BiOBr nanosheets in a microfluidic chip. This study achieves 100% NAD+ to NADH conversion in 126 s, maintaining >87% efficiency over 32 h. Explore how photocatalysis and microfluidics combine to offer a sustainable, scalable solution for green ...
Chai Y +13 more
europepmc +2 more sources
Stable, Efficient, and Scalable Two-Dimensional Perovskites for Next-Generation Solar Cells. [PDF]
Small SciTwo‐dimensional perovskites are presented as a versatile platform for photovoltaic research, combining enhanced stability with competitive efficiencies. This review analyses 2D perovskite structure–property relationships linking crystallographic orientation and phase distribution and implications in stability and performance.
Bhat K, Das S, Roy A, Das PP.
europepmc +2 more sources
Analysis of Multiple-Access Discrimination Techniques for the Development of a PSD-Based VLP System [PDF]
Sensors, 2020 There are several technologies and techniques available when developing indoor positioning systems (IPS). Recently, the development of positioning systems based on optical signals has aroused great interest, mainly those using visible light from the ...
Álvaro De-La-Llana-Calvo +5 more
doaj +2 more sources
Sequential logic circuit gold codes for electronics and communication technologies [PDF]
MethodsXThe linear feedback shift register (LFSR) and Gold codes are used in telecommunications, Global Positioning System (GPS), satellite navigation, wireless systems, and code division multiple access (CDMA) dependent channel schemes for numerous radio ...
Aakanksha Devrari +4 more
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IEEE Photonics Journal, 2022 The scheme of combining relay and optical code division multiple access (OCDMA) is one of the effective methods to improve the reliability and security of free space optical (FSO) communication system.
Jianhua Ji +4 more
doaj +1 more source
Digital Communications and Networks, 2021 This paper reports the implementation and theoretical model for analyzing an optical CDMA/DWDM hybrid system to reduce two major problems, the Inter-Symbol Interference (ISI) and the Four-Wave Mixing (FWM) effects and improve the performance of optical ...
Naif Alsowaidi +2 more
doaj +1 more source
Photonics, 2022 This paper carries out a numerical simulation investigating three different modulation formats: carrier suppressed return to zero (CSRZ), modified duobinary return to zero (MDRZ) and return to zero (RZ).
Naif Alsowaidi +2 more
doaj +1 more source
Flexible Free-Space Optical CDMA Networks
IEEE Access, 2023 In this paper, we propose a novel hybrid network solution using optical code-division multiple-access and free-space optics (OCDMA-FSO) to support multiple data rates and quality-of-service according to user requirements.
Maria Alvarez-Roa +7 more
doaj +1 more source