Contact Us

For Marketing, Sales and Subscriptions Inquiries
2637 E Atlantic Blvd #43110
Pompano Beach, FL 33062
USA

Conference List

Analysis of the Effect of Variations in Refractivity Gradient on Line of Sight Percentage Clearance and Single Knife Edge Diffraction Loss

Eduediuyai, Dan

,

Enyenihi, Johnson

,

Idorenyin Markson

Eduediuyai, Dan 1
Enyenihi, Johnson 2

Idorenyin Markson 3

  1. Department of Computer Engineering Federal Polytechnic Ukana, Akwa Ibom State, Nigeria 1

  2. Department of Electrical/Electronic Engineering, Akwa Ibom State University Mkpat Enin, Akwa Ibom State, Nigeria 2

  3. Department of Mechanical Engineering, University of Uyo, Akwa Ibom, Nigeria 3

Pages: 1-9

DOI: 10.18488/journal.13.2019.81.1.9

Share :

Article History:

Received: 17 October, 2018
Revised: 21 November, 2018
Accepted: 24 December, 2018
Published: 27 February, 2019


Abstract:

In this paper, analysis of the effect of variations in refractivity gradient on line of sight percentage clearance and single knife edge diffraction loss is presented. Relevant, mathematical expressions and approaches for the analyses are presented. Sample path profile data of terrestrial line of sight (LOS) microwave communication links operating at C-band 5.5 GHz frequency and Ku-band 11 GHz frequency with 15 Km path length are used in the study to demonstrate the application of the ideas presented in this paper. The results showed that the critical point of minimum LOS percentage clearance occurred at a distance of 8.89 Km from the transmitter. Based on the results regression models were derived for relating the refractivity gradient to the effective earth K-factor, earth bulge, LOS percentage clearance and single knife edge LOS percentage clearance. The implication of the result is that, given that for any location the refractivity gradient varies with the primary atmospheric parameters like temperature, pressure and relative humidity, the amount of diffraction loss posed to the signal in the atmosphere will be varying at different rates depending on the prevailing values of the atmospheric parameters upon which refractivity gradient depends. Also, apart from the reference refractivity gradient of 39.25 N units/km, different frequencies will experience different amount of diffraction loss. The specific impact of the refractivity gradient on different frequencies depends on whether the prevailing refractivity gradient is above or below the reference refractivity gradient of 39.25 N units/km.
Contribution/ Originality
This study is one of very few studies which have investigated the effect of variations in refractivity gradient on line of sight percentage clearance and single knife edge diffraction loss. The ideas presented can easily be used to study the effect of variations in atmospheric parameters on wireless signal quality.

Keywords:

Refractivity, Refractivity gradient, Line of Sight , Percentage clearance of LOS, Diffraction loss, Earth bulge, Effective earth radius factor

Video:

Reference:


Statistics:

Google Scholor ideas Microsoft Academic Search bing Google Scholor

Funding:

This study received no specific financial support.

Competing Interests:

The authors declare that they have no competing interests.

Acknowledgement:

All authors contributed equally to the conception and design of the study.

Related Article

( 1 ) Spatio-Temporal Analysis of Agricultural Development A Block-Wise Study of Dehradun District
( 2 ) Optimal Density Determination of Bouguer Anomaly Using Fractal Analysis (Case of Study: Charak Area, Iran)
( 3 ) Energy Consumption and Economic Growth in Nigeria: A Causality Analysis
( 4 ) Energy Consumption and Thermal Comfort Analysis of Public Housing in Sao Paulo, Brazil
( 5 ) Well Log Sequence Stratigraphic and Palynological Analysis of Late Miocene to Pliocene Agbada Formation, Southwestern Niger Delta Basin, Nigeria
( 6 ) Application of Geospatial Analysis and Augmented Reality Visualization in Indoor Advertising
( 7 ) Analysis of Farmers’ Vulnerability, Perception and Adaptation to Climate Change in Kwara State, Nigeria
( 8 ) Analysis of Dioxins Concentration in Domestic Waste and Burnt Tyre Residue at Gosa Dumpsite in Abuja, Nigeria
( 9 ) Comparison of the Gravimetric Network in Esfarayen Region with the Network of Fractal Analysis
( 10 ) An Analysis of Effective Factors on Spatial Distribution of Poverty in Rural Regions of Hamedan Province
( 11 ) Urban Sprawl Analysis in Jalingo Metropolis, Taraba State Nigeria
( 12 ) Sensitivity Analysis and Vulnerability Mapping of the Guilan Aquifer Using Drastic Method
( 13 ) Analysis of the Trends in Temperature and Rainfall in Thika River Basin in Kenya
( 14 ) Analysis of the Factors Affecting Changes in Land Cover Patterns in Rural Districts in East of Guilan Province (Iran) for Foresight
( 15 ) Sphene and Zircon Fission Track Analysis of Syenite Rocks of the Sushina Hills, Purulia-Bankura Shear Zone (TPSZ)
( 16 ) Analysis of the Effect of Variations in Refractivity Gradient on Line of Sight Percentage Clearance and Single Knife Edge Diffraction Loss
( 17 ) Reading Activities in Kauman Area, Parakan, Indonesia, During the Colonial Era Using Mapping Analysis
( 18 ) Geographical Analysis of Household Waste Generation and Disposal in Taraba State, Northeast Nigeria
( 19 ) Soil Thermal Properties and the Effects of Groundwater on Closed Loops
( 20 ) Direct Effects of Stubble Burning on Some Edaphic Characteristics of Coastal Plain Sands at Different Heating Intensities
( 21 ) Application of Response Surface Methodology (RSM) and Artificial Neural Network (ANN) for Achieving Desire BA in the Biotransformation of Benzaldehyde Using Free Cells of Saccharomyces Cerevisae and the Effect of Β-Cyclodextrin
( 22 ) Tourism Advertisement Management and Effective Tools in Tourism Industry
( 23 ) Effects of Climatic Change On Gsm Signal in Lagos Metropolitan Terrain
( 24 ) Agrochemicals and Personal Care Products: Occurrence, Effects, Analytical Determination and Treatment Processes
( 25 ) Effect of Active Mass in Electrode Disc on Performance of Li1.06ni0.313co0.313mn0.313o2cathode
( 26 ) An Exploratory Study of Effects of Prepaid Metering and Energy Related Behaviour among Ghanaian Household
( 27 ) The Effect of Ergonomics on Sustainable Urban Development: A Case Study
( 29 ) Investigation of the Effect of Weather Conditions on Solar Energy in Rivers State University of Science and Technology, Port Harcourt, Nigeria
( 30 ) Dimension Effect on the Ultrasonic Pulse Velocity
( 31 ) The Effect of Co2 Emission and Economic Growth on Energy Consumption in Sub Sahara Africa
( 32 ) Assessment of Environmental Effect of Abandoned Uranium Mine Site in Mika Village of Taraba State Nigeria
( 33 ) Effect of Local Admixture Ipomoea Asarifolia (Ajara) on the Strength Characteristics of Stabilized and Unstabilized Lateritic Blocks
( 34 ) Likely Effects of Geological Features on Carbonate Rock Strength
( 35 ) Mössbauer Research of Surface-Surface Concentric-Zonal Color Effects in Zoloceramic Materials
( 37 ) Economic Contributions and Environmental Effects of Geothermal Energy: Çanakkale-Tuzla Geothermal Example
( 38 ) Effects of Municipal Abattoir Waste on Water Quality of Woji River in Trans-Amadi Industrial Area of Port Harcourt, Nigeria: Implication for Sustainable Urban Environmental Management
( 39 ) The Impact of Land Use on Spatial Variations of Begging in District Lahore_Pakistan
( 40 ) Variations of Atmospheric Boundary Layer Stability Conditions Over Climate Belts in Nigeria
( 43 ) Determination of Refractivity Gradient and Modified Refractivity Gradient for Cross River State
( 46 ) Valorization of Hazelnut Biomass Framework in Turkey: Support and Model Guidelines from the Italian Experience in the Field of Renewable Energy