Assessment of Wireless Signal Propagation in an Obstacle Rich Environment and Maintenance Communication Capability

2021 ◽  
pp. 364-377
Author(s):  
Marko Božić ◽  
Tomislav Keser ◽  
Andi Bašić
Keyword(s):  
Signal Propagation ◽  
Wireless Signal ◽  
Communication Capability

FIELD TEST OF WIRELESS SENSOR NETWORK IN THE NUCLEAR ENVIRONMENT

2014 ◽  
Vol 3 (01) ◽  
pp. 47-51 ◽  
Author(s):  
L. Li ◽  
Q. Wang ◽  
A. Bari ◽  
C. Deng ◽  
D. Chen ◽  
...  
Keyword(s):  
Electromagnetic Interference ◽  
Nuclear Power ◽  
Power Plants ◽  
Low Cost ◽  
Signal Propagation ◽  
Nuclear Radiation ◽  
Wireless Sensor ◽  
Wireless Signal ◽  
Nuclear Environment ◽  
Interference Tests

Wireless sensor networks (WSNs) are appealing options for the health monitoring of nuclear power plants due to their low cost and flexibility. Before they can be used in highly regulated nuclear environments, their reliability in the nuclear environment and compatibility with existing devices have to be assessed. In situ electromagnetic interference tests, wireless signal propagation tests, and nuclear radiation hardness tests conducted on candidate WSN systems at AECL Chalk River Labs are presented. The results are favourable to WSN in nuclear applications.

Effects of Varying Distance on Wireless Signal Propagation in Indoor and Outdoor Built Sites

2011 ◽  
Vol 6 ◽  
pp. 75-89 ◽  
Author(s):  
B.K. Chomba ◽  
D.B.O. Konditi ◽  
D.M. Nyaanga ◽  
J.M. Githeko
Keyword(s):  
Communication Systems ◽  
Signal Propagation ◽  
Interference Signal ◽  
Indoor Environments ◽  
Signal Loss ◽  
Signal Attenuation ◽  
Ieee 802.11B ◽  
Wireless Signal ◽  
Rf Signal ◽  
Indoor And Outdoor

The effects of varying distances on wireless signal propagation in indoor and outdoor built sites is presented in this paper. In indoor and outdoor built sites the major RF signal attenuation is due to multi-path interference, signal loss (fading), and non-line of sight signal blockage. A number of mobile communication systems is currently and frequently being used in indoor environments based on IEEE 802.11b standards which is on 2.4GHz frequency ISM band at the rate of 11Mbps. To determine the effects of varying distances on signal strength at 2.457 GHz, a Spykee spy Wi-Fi robot was used as the transmitter and laptop installed with a Wi-Fi card and Spykee console software to control the robot was used as the receiver. Results showed that the signal attenuation levels increased as distances increased.

3-D Research about Walfisch-Bertoni Model

2013 ◽  
Vol 385-386 ◽  
pp. 1527-1530 ◽  
Author(s):  
Jie Chen ◽  
Dong Ya Shen ◽  
Na Yao ◽  
Ren Zhang
Keyword(s):  
Distribution Function ◽  
Cumulative Distribution Function ◽  
Path Loss ◽  
Signal Propagation ◽  
Loss Probability ◽  
Cumulative Distribution ◽  
Diffraction Loss ◽  
Wireless Signal ◽  
Probability Density Function Pdf ◽  
Signal Field

Walfisch - Bertoni model is used to predict the average signal field intensity of the main street. The model considers the path loss of the free space, diffraction loss along the path, and the influence of the height of the building. There are six City parameters in Walfisch - Bertoni model influence communication quality. In this paper, the researches about path loss and its characteristics is under the case of considering two city parameters at the same time. Facts have proved that this case is more close to the actual that the wireless signal propagation environment. This paper mainly researched the path loss, probability density function (PDF) and cumulative distribution function (CDF) of the path loss.

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