The document discusses several radio propagation models used for predicting signal behavior in different environments:
1. The Hata model is based on the Okumura model and has separate models for urban, suburban, and open areas. The urban Hata model is most widely used for built up areas.
2. Mathematical formulations are provided for path loss prediction using the Hata model for various environments. Frequency range is 150-1500 MHz.
3. The Young model is based on data from New York City and models signal behavior in large cities with tall structures. Frequency range is 150 MHz to 3700 MHz.
4. The Okumura model was developed using data from Tokyo and serves as the basis for the
Hello everyone. This is a short presentation on path loss and shadowing. I have not covered all the topics but a brief idea is given on path loss and wireless channel propagation models.
Hope you find it useful.
Thanks
Kinds of Propagation Models
Models of Different Types of Cells
Web Plot Digitizer Tool
Study of the parameters fc, d, hb, hm and Coverage Environments for each of OKUMURA, HATA and COST231
MATLAB Simulation
Indoor propagation is necessary where outdoor propagation don't work perfectly like house, buildings, sports arena. Different material is used in different types of building then signal doesn't propagate as well as in outdoor. So There are different models for different Scenarios due to different environment, wall, etc.
Hello everyone. This is a short presentation on path loss and shadowing. I have not covered all the topics but a brief idea is given on path loss and wireless channel propagation models.
Hope you find it useful.
Thanks
Kinds of Propagation Models
Models of Different Types of Cells
Web Plot Digitizer Tool
Study of the parameters fc, d, hb, hm and Coverage Environments for each of OKUMURA, HATA and COST231
MATLAB Simulation
Indoor propagation is necessary where outdoor propagation don't work perfectly like house, buildings, sports arena. Different material is used in different types of building then signal doesn't propagate as well as in outdoor. So There are different models for different Scenarios due to different environment, wall, etc.
The attached narrated power point presentation attempts to explain the working principle, types, classifications, merits, demerits, applications,safety and deployment issues related to Raman Amplifiers. The material will be useful for KTU final year B Tech students who prepare for the subject EC 405, Optical Communications.
Introduction to basics of wireless networks such as
• Radio waves & wireless signal encoding techniques
• Wireless networking issues & constraints
• Wireless internetworking devices
The attached narrated power point presentation attempts to explain the working principle, types, classifications, merits, demerits, applications,safety and deployment issues related to Raman Amplifiers. The material will be useful for KTU final year B Tech students who prepare for the subject EC 405, Optical Communications.
Introduction to basics of wireless networks such as
• Radio waves & wireless signal encoding techniques
• Wireless networking issues & constraints
• Wireless internetworking devices
Co-channel and adjacent-channel interference evaluation of an outdoor telecom...Konstantinos Stamatakis
The objective of the present paper is to evaluate the
impact of adjacent and co-channel interference on the
performance of some standard report systems that exists in an
outdoor telecommunications cabinet - base station (BS) (also
known as KV, from the acronym of the German word
Kabelverzweiger) and devices that technicians frequently use.
Specifically, the interference analyzed is between devices, such as
Bluetooth handset, laptop and measurement tools, that are
usually used during inspections and repairs by technicians and
wireless reporting systems installed inside BS that provide
information about BS’s condition and real time connection with
the help desk back office
Loss of strength, A periodic reduction in the received strength of a radio transmission.
This is about the phenomenon of loss of signal in telecommunications.Fading refers to the
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COMPARISON OF RADIO PROPAGATION MODELS FOR LONG TERM EVOLUTION (LTE) NETWORKijngnjournal
This paper concerns about the radio propagation models used for the upcoming 4th Generation (4G) of cellular networks known as Long Term Evolution (LTE). The radio wave propagation model or path loss model plays a very significant role in planning of any wireless communication systems. In this paper, a comparison is made between different proposed radio propagation models that would be used for LTE, like Stanford University Interim (SUI) model, Okumura model, Hata COST 231 model, COST Walfisch-Ikegami & Ericsson 9999 model. The comparison is made using different terrains e.g. urban, suburban and rural area.SUI model shows the lowest path lost in all the terrains while COST 231 Hata model illustrates highest path loss in urban area and COST Walfisch-Ikegami model has highest path loss for suburban and rural environments.
Compared to wireless deployment in areas with different environmentseIJECEIAES
In the mobile phone system, it is highly desirable to estimate the loss of the track not only to improve performance but also to achieve an accurate estimate of financial feasibility; the inaccurate estimate of track loss either leads to performance degradation or increased cost. Various models have been introduced to accurately estimate the path loss. One of these models is the Okomura / Hata model, which is recommended for estimating path loss in cellular systems that use micro cells. This system is suitable for use in a variety of environments. This study examines the comparison of path loss models for statistical analysis derived from experimental data collected in urban and suburban areas at frequencies of 150-1500 MHz’s The results of the measurements were used to develop path loss models in urban and suburban areas. The results showed that Pathloss increases in urban areas respectively.
AN ANALYTICAL ANALYSIS OF PATH LOSS MODELS FOR MOBILE CELLULAR WIRELESS COMMU...IJCI JOURNAL
The paper deals with the study based on the comparative analysis of radio propagation models for mobile
cellular wireless communication of global system for mobile at frequencies 0.9 GHz and 1.8 GHz,
respectively. The path loss propagation models are vital tool for planning the wireless network as well as
designed to predict path loss in a meticulous environment. Various propagation models: Free-space
model, CCIR (ITU-R) model, Hata model, Ericson model, and Stanford University Interim (SUI) model
have been studied and examined through analytically from the base station (BS) to mobile station (MS)
and vice versa followed by respective simulation performance evaluation by using Matlab simulator. The
observed data is collected at the operating frequency of 0.9 GHz from various environments (high density
region and low density region) using the spectrum analyzer and path loss comparison is shown for
different model.
An Analytical Analysis of Path Loss Models for Mobile Cellular Wireless Commu...IJCI JOURNAL
The paper deals with the study based on the comparative analysis of radio propagation models for mobile cellular wireless communication of global system for mobile at frequencies 0.9 GHz and 1.8 GHz,respectively. The path loss propagation models are vital tool for planning the wireless network as well as
designed to predict path loss in a meticulous environment. Various propagation models: Free-space model, CCIR (ITU-R) model, Hata model, Ericson model, and Stanford University Interim (SUI) model have been studied and examined through analytically from the base station (BS) to mobile station (MS)
and vice versa followed by respective simulation performance evaluation by using Matlab simulator. The observed data is collected at the operating frequency of 0.9 GHz from various environments (high density region and low density region) using the spectrum analyzer and path loss comparison is shown for
different model.
AN ANALYTICAL ANALYSIS OF PATH LOSS MODELS FOR MOBILE CELLULAR WIRELESS COMMU...IJCI JOURNAL
The paper deals with the study based on the comparative analysis of radio propagation models for mobile cellular wireless communication of global system for mobile at frequencies 0.9 GHz and 1.8 GHz, respectively. The path loss propagation models are vital tool for planning the wireless network as well as
designed to predict path loss in a meticulous environment. Various propagation models: Free-space model, CCIR (ITU-R) model, Hata model, Ericson model, and Stanford University Interim (SUI) model have been studied and examined through analytically from the base station (BS) to mobile station (MS)
and vice versa followed by respective simulation performance evaluation by using Matlab simulator. The observed data is collected at the operating frequency of 0.9 GHz from various environments (high density region and low density region) using the spectrum analyzer and path loss comparison is shown for
different model.
IOSR Journal of Applied Physics (IOSR-JAP) is an open access international journal that provides rapid publication (within a month) of articles in all areas of physics and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in applied physics. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
What is Path loss?
Indoor Propogation Models?
Multi-floor model?
Partition attenuation model?
Empirical path loss model?
ITU Model for Indoor Attenuation/ Wall and floor factor model?
FRIIS MODEL?
Log-distance path loss model?
Comparative Study of Path Loss Models for Wireless Communication in Urban and...Onyebuchi nosiri
ABSTRACT: The study was based on the comparative analysis of radio propagation models for Global System for Mobile Communications at 900MHz. Drive test analyses were carried out from two selected terrains in Rivers State namely GRA Phase II and Aggrey Road classified as urban and suburban areas respectively, to evaluate the best propagation model for the study area. The data obtained were used to compare the various prediction models namely; Cost 231, Okumura-Hata and ECC-33. Mean path loss values of 115.16dB for Okumura-Hata and 117.79dB for COST 231 and 280.88dB for ECC-33 respectively were predicted in the urban environment. Mean path loss values of 115.16dB, 114.76dB and 314.84dB were predicted by Okumura-Hata, Cost 231and ECC-33 models respectively in the suburban environment. ECC-33 over estimated path loss and gave the highest prediction in both environments. Okumura-Hata model showed better performance in urban while COST 231 performed better in the suburban environment. Okumura-hata and COST 231 models are recommended for deployment in urban and suburban environments respectively.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
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This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
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Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
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Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
2. Page 2
HATA MODEL
The term Hata Model refers to a radio propagation model that is based on the Okumura Model.
It is turn has developed separate models for varying environments:
Hata Model for Urban Areas
Hata Model for Suburban Areas
Hata Model for Open Areas
There are more specific models for special uses. For example the cost hata model, an urban
Hata Model, was developed by the Cooperation euro penne dins le domain de la recherché
Scientifique Technique.
HATA MODEL FOR URBAN AREA
In wireless communication, the Hata model for urban areas, also known as the Okumura–Hata
model for being a developed version of the Okumura model, is the most widely used radio
frequency propagation model for predicting the behavior of cellular transmissions in built up
areas. This model incorporates the graphical information from Okumura model and develops it
further to realize the effects of diffraction, reflection and scattering caused by city structures.
This model also has two more varieties for transmission in suburban areas and open areas.
Hata Model predicts the total path loss along a link of terrestrial microwave or other type of
cellular communications
APPLICATION TOUNDER CONDITION
This particular version of the Hata model is applicable to the radio propagation within urban
areas.
This model is suited for both point-to-point and broadcast transmissions and it is based on
extensive empirical measurements taken.
PCS is another extension of the Hata model. The Walfisch and Bertoni model is further
advanced.
COVERAGE
Frequency: 150–1500 MHz
Mobile Station Antenna Height: 1–10 m
Base station Antenna Height: 30–200 m
Link distance: 1–10 km
3. Page 3
MATHEMATICALFORMULATION
The Hata model for urban areas is formulated as following:
For small or medium sized city,
And for large cities,
Where
= Path loss in urban areas. Unit: decibel (dB)
= Height of base station antenna. Unit: meter (m)
= Height of mobile station antenna. Unit: meter (m)
= Frequency of transmission. Unit: Megahertz (MHz).
= Antenna height correction factor
= Distance between the base and mobile stations. Unit: kilometer (km)
LIMITATION
Though based on the Okumura model, the Hata model does not provide coverage to the whole
range of frequencies covered by Okumura model. Hata model does not go beyond 1500 MHz
while Okumura provides support for up to 1920 MHz
HATA MODEL FOR SUBURBAN AREA
The Hata model for suburban areas, also known as the Okumura–Hata model for being a
developed version of the okumura model, is the most widely used model in radio frequency
propagation for predicting the behavior of cellular transmissions in city outskirts and other rural
areas. This model incorporates the graphical information from Okumura model and develops it
further to better suit the need. This model also has two more varieties for transmission in urban
areas and open.
The Hata model predicts the total path loss along a link of terrestrial microwave or other type of
cellular communications. And is a function of transmission frequency and the average path loss
in urban areas.
4. Page 4
APPLICATION TOUNDER CONDITION
This particular version of Hata model is applicable to the transmissions just out of the cities and
on rural areas where man-made structures are there but not so high and dense as in the cities.
To be more precise, this model is suitable where buildings exist, but the mobile station does not
have a significant variation of its height.
This model is suited for both point-to-point and broadcast transmissions
COVERAGE
Frequency: 150 MHz – 1.50 GHz
MATHEMATICALFORMULATION
Hata model for suburban areas is formulated as,
Where,
LSU = Path loss in suburban areas. Unit: decibel (dB)
LU = Average path loss in urban areas for small sized city. Unit: decibel (dB)
f = Frequency of transmission. Unit: megahertz (MHz).
POINTS TONOTE
This model is based on Hata model for urban areas and uses the median path loss from
urban areas.
HATA MODEL FOR OPEN AREA
The Hata model for open areas, also known as the Okumura–Hata model from its origins in
the Okumura model, is the most widely used model for predicting the behavior of cellular
radio transmissions in open areas. It further exploits the graphical information from the Okumura
model. Two additional varieties for transmission are urban areas and suburban areas.
The Hata model for open areas predicts the total path loss along a link of
terrestrial microwave or other type of cellular communications. It is a function of transmission
frequency and the median path loss in urban areas.
5. Page 5
APPLICATION TOUNDER CONDITION
This version of Hata model is applicable to the transmissions in open areas where no
obstructions block the transmission link. It is suited for both point-to-
point and broadcast transmissions.
COVERAGE
Frequency: 150 MHz to 1.5 GHz
MATHEMATICALFORMULATION
The Hata model for open areas is formulated as:
Where
LO = Path loss in open area. Unit: decibel (dB)
LU = Path loss in urban areas for small sized city. Unit: decibel (dB)
f = Frequency of transmission. Unit: Megahertz (MHz)
POINTS TONOTE
This model is dependent on the Hata model for urban areas.
YOUNG MODEL
Young model is a radio propagation model that was built on the data collected on City. It
typically models the behavior of cellular communication systems in large cities.
HISTORY
Young model was built on the data of 1952 in New York City.
APPLICATION TOUNDER CONDITION
This model is ideal for modeling the behavior of cellular communications in large cities with tall
structures.
COVERAGE
Frequency: 150 MHz to 3700 MHz
MATHEMATICALFORMULATION
The mathematical formulation for Young model is:
6. Page 6
Where,
L = path loss. Unit: decibel (dB)
GB = gain of base transmitter. Unit: decibel (dB)
GM = gain of mobile transmitter. Unit: decibel (dB)
hB = height of base station antenna. Unit: meter (m)
hM = height of mobile station antenna. Unit: meter (m)
d = link distance. Unit: kilometer (km)
= clutter factor
OKUMURA MODEL
The Okumura model for urban areas is a Radio propagation model that was built using the data
collected in the city of Tokyo, Japan. The model is ideal for using in cities with many urban
structures but not many tall blocking structures. The model served as a base for the Hata
Model.
Okumura model was built into three modes. The ones for urban, suburban and open areas. The
model for urban areas was built first and used as the base for others.
COVERAGE
Frequency = 150–1920 MHz
Mobile station antenna height: between 1 m and 10 m
Base station antenna height: between 30 m and 1000 m
Link distance: between 1 km and 100 km
MATHEMATICALFORMULATION
The Okumura model is formally expressed as:
7. Page 7
Where,
L = the median path loss. Unit: Decibel (dB)
LFSL = the free space loss. Unit: decibel (dB)
AMU = Median attenuation. Unit: decibel (dB)
HMG = Mobile station antenna height gain factor.
HBG = Base station antenna height gain factor.
Kcorrection = Correction factor gain (such as type of environment, water surfaces, isolated obstacle
etc.
POINTS TONOTE
Okumura's model is considered to be among the simplest and best in terms of
accuracy in path loss prediction for mature cellular and land mobile radio
systems in cluttered environments.
It is very practical and has become a standard for system planning in modern
land mobile radio systems in Japan. The major disadvantage with the model is its
slow response to rapid changes in terrain therefore the model is fairly good in
urban and suburban areas, but not as good in rural areas. Common standard
deviations between predicted and measured path loss values are around 10 dB
to 14 Db.