Design of a carrier-depletion Mach-Zehnder modulator in 250 nm silicon-on-insulator technology [PDF]
Advances in Radio Science, 2017 We present the design of a single-drive Mach-Zehnder modulator for amplitude modulation in silicon-on-insulator technology with 250 nm active layer thickness. The applied RF signal modulates the carrier density in a reverse biased lateral pn-junction.
M. Félix Rosa +7 more
doaj +1 more source
Graphene-Fiber Biochemical Sensors: Principles, Implementations, and Advances
Photonic Sensors, 2021 Single atomically thick graphene, with unique structural flexibility, surface sensitivity, and effective light-mater interaction, has shown exceptional advances in optoelectronics. It opens a door for diverse functionalized photonic devices, ranging from
Ning An +8 more
doaj +1 more source
Packet Flow Capacity Autonomous Operation Based on Reinforcement Learning
Sensors, 2021 As the dynamicity of the traffic increases, the need for self-network operation becomes more evident. One of the solutions that might bring cost savings to network operators is the dynamic capacity management of large packet flows, especially in the ...
Sima Barzegar, Marc Ruiz, Luis Velasco
doaj +1 more source
Envelope tracking of a radio frequency amplifier for Long Term Evolution using a three-level class-G modulator [PDF]
Advances in Radio Science, 2013 In this contribution, efficiency enhancement of a radio frequency (RF) power amplifier (PA) for Long Term Evolution (LTE) base stations using envelope tracking is investigated. The dynamically adapted drain bias voltage is provided by a three-level class-
A. Bräckle +4 more
doaj +1 more source
Map-Assisted Constellation Design for mmWave WDM With OAM in Short-Range LOS Environment
IEEE Open Journal of the Communications Society, 2023 We consider a system that integrates positioning and single-user millimeter wave (mmWave) communication, where the communication part adopts wavelength division multiplexing (WDM) and orbital angular momentum (OAM).
Yuan Wang +3 more
doaj +1 more source
IEEE Photonics Journal, 2022 We address the lens optimization and signal processing for array-based multiple-input multiple-output (MIMO) visible light communication, especially under link misalignment.
Jiaqi Wei +3 more
doaj +1 more source
Deep Learning-Based Robust Visible Light Positioning for High-Speed Vehicles
Photonics, 2022 Robustness is a key factor for real-time positioning and navigation, especially for high-speed vehicles. While visible light positioning (VLP) based on LED illumination and image sensors is widely studied, most of the VLP systems still suffer from the ...
Danjie Li +12 more
doaj +1 more source
Multiple Wavelength Free-Space Laser Communications [PDF]
, 2003 Free-space optical communications systems in the atmosphere, based on intensity modulation and direct detection, are heavily affected by fading caused by turbulence cells of varying scale and motion.
Perlot, Nicolas +9 more
core +1 more source
Performance optimization of free-space optical communication protocols based on results from FSO demonstrations [PDF]
, 2007 The mobile free-space optical channel mainly suffers from relatively long link outages, produced by short-term blockings of the line-of-sight (obstacles, clouds), pointing- and tracking-errors or deep signal-fades caused by index of refraction turbulence
Bernhard Epple, Epple, Bernhard
core +1 more source
Controllable 3D display system based on frontal projection lenticular screen [PDF]
Journal of the European Optical Society-Rapid Publications, 2014 A novel auto-stereoscopic three-dimensional (3D) projection display system based on the frontal projection lenticular screen is demonstrated. It can provide high real 3D experiences and the freedom of interaction.
Feng Q. +6 more
doaj +1 more source