Results 21 to 30 of about 852,457 (267)

Analog Wavelength Locking in an Optical Single-Sideband Transmitter of a Millimeter-Wave Radio-Over-Fiber Link Featuring a Micro-Ring Resonator and a Heat-Pump-Controlled Laser

open access: yesPhotonics, 2023
This paper presents a novel approach to addressing the issue of temperature-induced instability in an optical, single-sideband transmitter based on a micro-ring resonator (MRR) suitable for millimeter-wave (mmW) radio-over-fiber (RoF) communications.
Kristjan Vuk Baliž   +3 more
doaj   +1 more source

A novel approach for optimization of handover mechanism using metaheuristics algorithms

open access: yesMeasurement: Sensors, 2022
The new generation wireless system is an integrated global network, which provides many services for end users across the globe. The major requirement of end users is to allow the mobile user to roam seamlessly across the network.
Mithun B. Patil, Laxmi Math
doaj   +1 more source

Design and Analysis of Ultralow Voltage Graphene on the Silicon Rich Nitride Tunable Ring Resonator-Based Add-Drop Filter for DWDM Systems

open access: yesInternational Journal of Optics, 2022
We propose and simulate a third-order 3D electro-optically highly tunable compact add-drop filter based on nonlinear microring resonators. The used tuning mechanism relies on enhanced Kerr nonlinearity in a graphene layer integrated on top of a two ...
Filston Rukerandanga   +2 more
doaj   +1 more source

Extracting Customer Behavior Pattern in a Telecom Company Using Temporal Fuzzy Clustering and Data Mining [PDF]

open access: yesJournal of Information Technology Management, 2017
One of the most important issues in Customer Relationship Management is customer segmentation and product offer based on their needs. In practice, Customer’s behavior will change over the time by changes in technology, increase in the number of new ...
Mohammad Fathian, Ehsan Azhdari
doaj   +1 more source

THE ATS-1 COMMUNICATIONS MODEL: QUASI-MASS AUDIO NETWORKS FOR EDUCATION AND SOCIAL SERVICE

open access: yesPrometheus, 1984
The ATS-1 satellite is used for social service audioconference networks in the Pacific Islands. Channel limitations restrict the communication efficiency of these networks, but not so badly as to drop them below accepted standards for telecommunication ...
James C. Lange
doaj   +1 more source

Characteristics of Rain-Induced Attenuation over Signal Links at Frequency Ranges of 25 and 38 GHz Observed in Beijing

open access: yesRemote Sensing, 2021
Wireless communication has become a very important part of our lives, and it is well known that meteorological factors affect the quality of communication links, especially at higher frequencies because the physical dimensions of raindrops, hail stones ...
Congzheng Han   +9 more
doaj   +1 more source

Specification of multiparty audio and video interaction based on the Reference Model of Open Distributed Processing [PDF]

open access: yes, 1994
The Reference Model of Open Distributed Processing (RM-ODP) is an emerging ISO/ITU-T standard. It provides a framework of abstractions based on viewpoints, and it defines five viewpoint languages to model open distributed systems.
Gay, V.C.J.   +3 more
core   +13 more sources

Designing a Novel High-Performance FBG-OADM Based on Finite Element and Eigenmode Expansion Methods

open access: yesApplied Sciences, 2016
This study designed a novel high-performance fiber Bragg grating (FBG) optical add/drop multiplexers (OADMs) by referring to current numerical simulation methods. The proposed FBG-OADM comprises two single-mode fibers placed side by side.
Sheng-Chih Yang   +2 more
doaj   +1 more source

Plasmonic Filter and Demultiplexer Based on Square Ring Resonator

open access: yesApplied Sciences, 2018
A ring resonator is a basic component of traditional photonic integrated circuits (PIC), which has been, however, found difficult to be applied efficiently in high-compact plasmonic metal-insulator-metal (MIM) systems.
Zhaojian Zhang   +6 more
doaj   +1 more source

A high-resolution burst-mode laser transmitter with fast and accurate level monitoring for 1.25 Gb/s upstream GPONs [PDF]

open access: yes, 2005
A
Bauwelinck, Johan   +6 more
core   +2 more sources

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