Fiber Optics vs. Conventional Transmission Lines in Distance Communication Systems

1980 ◽  
pp. 305-312
Author(s):  
C. J. Georgopoulos ◽  
N. P. Athanasiadis
Keyword(s):  
Fiber Optics ◽  
Transmission Lines ◽  
Communication Systems ◽  
Distance Communication

SIGNAL PROCESSING IN LONG-DISTANCE COMMUNICATION SYSTEMS

2015 ◽  
Vol 74 (10) ◽  
pp. 895-904
Author(s):  
A. I. Litvin-Popovich ◽  
S.I. Pavlik
Keyword(s):  
Signal Processing ◽  
Communication Systems ◽  
Long Distance ◽  
Distance Communication

scholarly journals Study of Optical Fiber Design Parameters in Fiber Optics Communications

2017 ◽  
Vol 2 (3) ◽  
pp. 302-308 ◽  
Author(s):  
Salim Qadir Mohammed ◽  
Asaad M. Asaad M. Al-Hindawi
Keyword(s):  
Optical Fiber ◽  
Fiber Optics ◽  
Numerical Aperture ◽  
Design Parameters ◽  
Light Sources ◽  
Long Distance ◽  
Graded Index ◽  
Large Bandwidth ◽  
Telecommunication Infrastructure ◽  
Distance Communication

Fiber optics is an important part in the telecommunication infrastructure. Large bandwidth and low attenuation are features for the fiber optics to provide gigabit transmission. Nowadays, fiber optics are used widely in long distance communication and networking to provide the required information traffic for multimedia applications. In this paper, the optical fiber structure and the operation mechanism for multimode and single modes are analyzed. The design parameters such as core radius, numerical aperture, attenuation, dispersion and information capacity for step index and graded index fibers are studied, calculated and compared for different light sources.

scholarly journals BPL-PLC Voice Communication System for the Oil and Mining Industry

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4763
Author(s):  
Grzegorz Debita ◽  
Przemysław Falkowski-Gilski ◽  
Marcin Habrych ◽  
Grzegorz Wiśniewski ◽  
Bogdan Miedziński ◽  
...  
Keyword(s):  
Fiber Optics ◽  
Communication System ◽  
Communication Systems ◽  
High Efficiency ◽  
Coal Dust ◽  
Mining Industry ◽  
Power Line ◽  
Communication Link ◽  
Voice Communication ◽  
Medium Voltage

Application of a high-efficiency voice communication systems based on broadband over power line-power line communication (BPL-PLC) technology in medium voltage networks, including hazardous areas (like the oil and mining industry), as a redundant mean of wired communication (apart from traditional fiber optics and electrical wires) can be beneficial. Due to the possibility of utilizing existing electrical infrastructure, it can significantly reduce deployment costs. Additionally, it can be applied under difficult conditions, thanks to battery-powered devices. During an emergency situation (e.g., after coal dust explosion), the medium voltage cables are resistant to mechanical damage, providing a potentially life-saving communication link between the supervisor, rescue team, paramedics, and the trapped personnel. The assessment of such a system requires a comprehensive and accurate examination, including a number of factors. Therefore, various models were tested, considering: different transmission paths and types of coupling (inductive and capacitive), as well as various lengths of transmitted data packets. Next, a subjective quality evaluation study was carried out, considering speech signals from a number of languages (English, German, and Polish). Based on the obtained results, including both simulations and measurements, appropriate practical conclusions were formulated. Results confirmed the applicability of BPL-PLC technology as an efficient voice communication system for the oil and mining industry.

scholarly journals Tangled Transmissions: The Differentiation of Historic Telegraph and Telephone Lines through Material Culture

2020 ◽  
pp. 23-46
Author(s):  
Joshua Birndorf ◽  
Scott Ingram
Keyword(s):  
Material Culture ◽  
Transmission Lines ◽  
Communication Systems ◽  
Temporal Evolution ◽  
Archaeological Site ◽  
Historical Record ◽  
Cultural Resources ◽  
Survey Area ◽  
Archaeological Work ◽  
Temporal Overlap

Historic telegraph and telephone material culture are frequently encountered but seldom differentiated during archaeological site and survey work in Colorado. The poles, wires, and insulators that comprise these cultural resources are often recorded simply as transmission lines. The research reported here is the first archaeologically focused comparative study of telegraph and telephone material culture designed to help archaeologists differentiate between the two communication systems. Differentiating and documenting these systems fills gaps in an inadequate historical record of their spatial and temporal evolution and contributes to site and survey area interpretations. We find substantial material culture similarities due to shared hardware and the temporal overlap of the introduction of these systems to Colorado. We also identify several material attributes to help differentiate the systems. Accurately identifying cultural resources is a mainstay of archaeological work and we make progress by understanding the possibilities and challenges of differentiating these poorly documented resources.

scholarly journals Evolution Of Fair Business Performance As A Tool Of Marketing In Spain

2011 ◽  
Vol 15 (5) ◽  
pp. 1-10 ◽  
Author(s):  
Maria Cordente-Rodriguez ◽  
Juan-Antonio Mondejar-Jimenez ◽  
Juan-Carlos Gazquez-Abad
Keyword(s):  
Communication Systems ◽  
Business Performance ◽  
Information Technologies ◽  
Business Relationship ◽  
Communication Tool ◽  
Communication Platform ◽  
New Business ◽  
Distance Communication ◽  
Areas Of Interest

Although the distance communication systems have been developed in the last years thanks to the development of communication and information technologies, recent studies argue that simple ways of communication like fairs maintain and increase their weigh cause of their profitability. In this way the fairs represent an important communication platform, whose use is generalized in the all economic areas. The aim of this paper is analyze the evolution of fair business in Spain, in the period 2002-2009, to solve two important questions which revolve about the efficiency of this communication tool and its power to maintain and establish new business relationship. For this, this paper analyzes the main characteristics or indicators of fair business, such as number of celebrated events, areas of interest, number of exhibitors or the number of attendees, from the information of Spanish Association of Fairs.

Optical cables for short-distance communication systems

1979 ◽  
Author(s):  
H. Aulich ◽  
K. H. Eisenrith ◽  
G. Kinshofer ◽  
J. Grabmaier ◽  
E. Mayr ◽  
...  
Keyword(s):  
Short Distance ◽  
Communication Systems ◽  
Distance Communication
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