The Realisation and Performance of Terminal Equipment for Circular Waveguide TE01? Mode Trunk Communication Systems

1973 ◽  
Author(s):  
M. B. Read
Keyword(s):  
Communication Systems ◽  
Circular Waveguide ◽  
Te01 Mode ◽  
And Performance ◽  
Terminal Equipment

scholarly journals Fog and rain attenuation characterization and performance of terrestrial free space optical communication in Akure, Nigeria

2020 ◽  
Vol 4 (3) ◽  
pp. 125-134
Author(s):  
Ajewole M. O ◽  
Owolawi P. A ◽  
Ojo J. S ◽  
Adetunji R. M.
Keyword(s):  
Free Space ◽  
Communication Systems ◽  
Outer Space ◽  
Rain Attenuation ◽  
Integration Time ◽  
Free Space Optical ◽  
High Data ◽  
Space Optical Communication ◽  
And Performance ◽  
One Year

Reliable broadband communication requires secure high data rate and bandwidth links. With the observedincrease in broadband users, known communication systems such as RF and microwave links cannot promise suchrequirements due to link interference and low bandwidth. A current communication system that promises suchrequirements and more is Free Space Optical (FSO) communication. This system basically involves the transmissionof signal-modulated optical radiation from a transmitter to a receiver through the atmosphere or outer space. However,location-variant atmospheric channel degrades the performance of an FSO system under severe atmosphericconditions, thus necessitating local atmospheric attenuation studies.This paper presents the characterization of both fog- and rain-induced attenuation and the performance ofan FSO system in a terrestrial terrain at Akure, Nigeria. One-year archived visibility data and in-situ measured 1-minute integration time rain rate data obtained from Nigerian Meteorological Agency (NIMET) and the Departmentof Physics, Federal University of Technology, Akure were used to compute the fog- and rain-induced specificattenuations using Kruse model and Carboneur model respectively. The performance of the FSO system is analyzedthrough link margin by using the parameters of a commercial optical transceiver, Terescope 5000.

scholarly journals Fog and Rain Attenuation Characterization and Performance of Terrestrial Free Space Optical Communication in Akure, Nigeria

2019 ◽  
Vol 4 (3) ◽  
pp. 125-134
Author(s):  
Joseph Sunday Ojo ◽  
Owolawi P. A. ◽  
Ajewole M. O. ◽  
Adetunji R. M.
Keyword(s):  
Free Space ◽  
Communication Systems ◽  
Outer Space ◽  
Rain Attenuation ◽  
Integration Time ◽  
Atmospheric Conditions ◽  
Free Space Optical ◽  
High Data ◽  
Space Optical Communication ◽  
And Performance

 Reliable broadband communication requires secure high data rate and bandwidth links. With the observed increase in broadband users, known communication systems such as RF and microwave links cannot promise such requirements due to link interference and low bandwidth. A current communication system that promises such requirements and more is Free Space Optical (FSO) communication. This system basically involves the transmission of signal-modulated optical radiation from a transmitter to a receiver through the atmosphere or outer space. However, location-variant atmospheric channel degrades the performance of an FSO system under severe atmospheric conditions, thus necessitating local atmospheric attenuation studies. This paper presents the characterization of both fog- and rain-induced attenuation and the performance of an FSO system in a terrestrial terrain at Akure, Nigeria. One-year archived visibility data and in-situ measured 1-minute integration time rain rate data obtained from Nigerian Meteorological Agency (NIMET) and the Department of Physics, Federal University of Technology, Akure were used to compute the fog- and rain-induced specific attenuations using Kruse model and Carboneur model respectively. The performance of the FSO system is analyzed through link margin by using the parameters of a commercial optical transceiver, Terescope 5000.

A NEW GENERATION OF RUSSIAN SATELLITE COMMUNICATION SYSTEMS. OPTIONS FOR CREATION OF TERMINAL EQUIPMENT AND REALIZATION OF SERVICES

2021 ◽  
Author(s):  
Л.О. МЫРОВА ◽  
С.В. ШВЕЦ ◽  
И.А. БАЙГУТЛИНА ◽  
П.А. ЗАМЯТИН ◽  
Е.Ф. ЛЯДОВА
Keyword(s):  
Communication Systems ◽  
Satellite Communication ◽  
New Generation ◽  
Terminal Equipment

Описаны возможные направления создания терминального оборудования для новых спутниковых систем связи российского проекта «Сфера». Рассмотрены варианты построения терминальных систем для космических аппаратов «Марафон IoT» и «Скиф-Д». The possible directions of creating terminal equipment for new satellite communication systems of the Russian project Sphere are described. The options for constructing terminal systems for spacecrafts Marathon IoT and Skif-D are considered.

Lending a Hand

2013 ◽  
pp. 1-29
Author(s):  
George T. Karetsos
Keyword(s):  
Communication Systems ◽  
Performance Metrics ◽  
Control Design ◽  
Medium Access ◽  
Design And Implementation ◽  
Data Rates ◽  
Capacity Bounds ◽  
Cooperative Networking ◽  
Outage Probabilities ◽  
And Performance

Cooperative networking is considered one of the main enablers for achieving enhanced data rates in wireless communications. This is due to the fact that through cooperation the adverse effects of fading can be alleviated significantly. Thus, more reliable communication systems deployments can be devised, and performance enhancements can be achieved. In this chapter, the authors discuss the main aspects of cooperative networking starting from the main historical milestones that shaped the idea. Then they focus on the main mechanisms and techniques that foster cooperation and continue by studying performance metrics for various possible deployments, such as capacity bounds and outage probabilities. Finally, the authors take a more practical viewpoint and discuss aspects related to medium access control design and implementation that can serve as a stepping stone for the widespread deployment of cooperative networking.

scholarly journals Channel Modelling and Performance Limits of Vehicular Visible Light Communication Systems

2020 ◽  
Vol 69 (7) ◽  
pp. 6891-6901 ◽  
Author(s):  
Mehdi Karbalayghareh ◽  
Farshad Miramirkhani ◽  
Hossien B. Eldeeb ◽  
Refik Caglar Kizilirmak ◽  
Sadiq M. Sait ◽  
...  
Keyword(s):  
Visible Light ◽  
Communication Systems ◽  
Visible Light Communication ◽  
Performance Limits ◽  
Channel Modelling ◽  
And Performance

Design and Performance Analysis of Fractal Regular Slotted-Patch Antennas for Ultra-Wideband Communication Systems

2019 ◽  
Vol 105 (3) ◽  
pp. 819-833 ◽  
Author(s):  
Majed O. Dwairi ◽  
Mohamed S. Soliman ◽  
Ahmad A. Alahmadi ◽  
Sami H. A. Almalki ◽  
Iman I. M. Abu Sulayman
Keyword(s):  
Performance Analysis ◽  
Communication Systems ◽  
Ultra Wideband ◽  
Patch Antennas ◽  
And Performance ◽  
Ultra Wideband Communication

scholarly journals Optical Quantum Memory and its Applications in Quantum Communication Systems

2020 ◽  
Vol 125 ◽  
Author(s):  
Lijun Ma ◽  
Oliver Slattery ◽  
Xiao Tang
Keyword(s):  
Communication Systems ◽  
Quantum Systems ◽  
Quantum Memory ◽  
Research Progress ◽  
Quantum Communications ◽  
Quantum Repeater ◽  
Quantum Networks ◽  
And Performance ◽  
The Impact ◽  
Photon Source

Optical quantum memory is a device that can store the quantum state of photons and retrieve it on demand and with high fidelity. It is emerging as an essential device to enhance security, speed, scalability, and performance of many quantum systems used in communications, computing, metrology, and more. In this paper, we will specifically consider the impact of optical quantum memory on quantum communications systems. Following a general overview of the theoretical and experimental research progress in optical quantum memory, we will outline its role in quantum communications, including as a photon source, photon interference, quantum key distribution (QKD), quantum teleportation, quantum repeater, and quantum networks.

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