scholarly journals WLCp2-06: Modelling the Likelihood of Line-of-Sight for Air-to-Ground Radio Propagation in Urban Environments

2006 ◽  
Author(s):  
Qixing Feng ◽  
Eustace K. Tameh ◽  
Andrew R. Nix ◽  
Joe McGeehan
Keyword(s):  
Urban Environments ◽  
Radio Propagation ◽  
Line Of Sight

scholarly journals On the Realistic Radio and Network Planning of IoT Sensor Networks

Sensors ◽  
2019 ◽  
Vol 19 (15) ◽  
pp. 3264 ◽  
Author(s):  
Loizos Kanaris ◽  
Charalampos Sergiou ◽  
Akis Kokkinis ◽  
Aris Pafitis ◽  
Nikos Antoniou ◽  
...  
Keyword(s):  
Large Scale ◽  
Open Systems ◽  
Urban Environments ◽  
Radio Propagation ◽  
Correct Usage ◽  
Open Systems Interconnection ◽  
Physical Information ◽  
Network Simulators ◽  
And Performance ◽  
Real Test

Planning and deploying a functional large scale Wireless Sensor Network (WSN) or a Network of Internet of Things (IoTs) is a challenging task, especially in complex urban environments. A main network design bottleneck is the existence and/or correct usage of appropriate cross layer simulators that can generate realistic results for the scenario of interest. Existing network simulators tend to overlook the complexity of the physical radio propagation layer and consequently do not realistically simulate the main radio propagation conditions that take place in urban or suburban environments, thus passing inaccurate results between Open Systems Interconnection (OSI) layers. This work demonstrates through simulations and measurements that, by correctly passing physical information to higher layers, the overall simulation process produces more accurate results at the network layer. It is demonstrated that the resulting simulation methodology can be utilized to accomplish realistic wireless planning and performance analysis of the deployed nodes, with results that are very close to those of real test-beds, or actual WSN deployments.

scholarly journals Oliver Heaviside and the Heaviside layer

2018 ◽  
Vol 376 (2134) ◽  
pp. 20170459
Author(s):  
Hugh Griffiths
Keyword(s):  
Long Range ◽  
Electromagnetic Theory ◽  
Upper Atmosphere ◽  
Radio Propagation ◽  
Line Of Sight ◽  
Theme Issue ◽  
Guglielmo Marconi

In an entry in the Encyclopaedia Britannica in 1902, Oliver Heaviside had suggested the existence of a reflecting layer in the upper atmosphere to account for long range beyond line-of-sight radio propagation of the type demonstrated by Guglielmo Marconi in 1901, in the first transatlantic radio transmission. In about 1910, William Eccles proposed the name ‘Heaviside Layer’ for this phenomenon, and the name has subsequently been adopted and used quite widely. This paper describes the basis of Marconi's experiments and various interpretations of the results in the context of Heaviside's wider work. It also describes some later experiments to measure the height of the ionosphere. This article is part of the theme issue ‘Celebrating 125 years of Oliver Heaviside's ‘Electromagnetic Theory’’.

Ray-tracing analysis of the radio propagation on the line-of-sight maritime wireless environments

2018 ◽  
Vol 8 (4) ◽  
pp. 196
Author(s):  
Yoshinori Matsuura ◽  
Kohei Shimada ◽  
Yasuhiro Sato ◽  
Masaaki Yamanaka ◽  
Daiki Hashimoto
Keyword(s):  
Ray Tracing ◽  
Radio Propagation ◽  
Line Of Sight ◽  
Wireless Environments

Tactical line-of-sight radio propagation reliability modeling

2002 ◽  
Author(s):  
V.J. Procopio ◽  
K.H. Brockel ◽  
J.R. Inserra ◽  
F.G. Loso ◽  
P.A. Major ◽  
...  
Keyword(s):  
Radio Propagation ◽  
Line Of Sight ◽  
Reliability Modeling
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