Propagation-path losses characterization for 900 MHz cellular communications in Dhaka City (original) (raw)
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Mobile radio propagation path loss studies at VHF/UHF bands in Southern India
IEEE Transactions on Broadcasting, 2000
Field strength measurements at 200, 400 and 450 MHz (VHF/UHF band) were conducted with the field strength meter placed on board of a vehicle in Southern India. Observed field strength values were converted into path losses and are compared with different path loss prediction methods like Hata, Egli, Blomquist-Ladell, COST 231 Walfisch-Ikegami, Walfisch-Bertoni and ITU-R. These path loss studies are carried out in urban, suburban and open areas in this region. The results showed that Hata's method gave better agreement with observed values in urban, suburban and open regions. COST 231 Walfisch-Ikegami model is also in good agreement with the observed values in urban and suburban regions. Egli and Blomquist-Ladell methods showed moderate agreement in open region only. The agreement of Walfisch-Bertoni and ITU-R methods with observed values is not good.
Radioelectronics and Communications Systems, 2021
In this research we present the measured path loss values in typical urban and suburban areas at the operating frequency of 3.5 GHz. The measurements are carried out using the spectrum analyzer FSH6 in order to record the channel response. The values of path loss exponent n are calculated for urban and suburban environments. We also compare and analyze the path loss predictions with the measured data. The results of this research confirm that in urban areas the path loss estimation is influenced according to the greater distances. At the beginning of the measurements in urban environment the losses are equal 23 dB after 18 m from the measurement survey. The analysis of measurements centers on anticipating the normal signal quality at the collector set at the given remove from the transmitter as well as the changeability of the signal quality in the specific environment. The acquired from this work results are salutary for planning and installation of any base station with similar to the thoughtful locations environments in order to supply rules for cell arranging of remote communication frameworks as path loss could be a key in calculations within the plan of any radio communications framework system.
Advances in Science, Technology and Engineering Systems Journal
This investigation deals with the identification of the suitable empirical models for predicting radio wave propagation path losses in Erbil city of Kurdistan region in Iraq. For this purpose, two sites of Korek Telecom operating at 1800 MHz and 2100 MHz have been selected at urban and suburban environments in the city and seven different empirical path loss model named free space model, ECC-33, Stanford Interim University (SUI), Optimized Cost-231, Okumura-Hata, Egli, and Ericson models are tested against experimentally measured path loss values. The path loss was measured experimentally using Sony Ericson handset with complete required equipment and the results are compared to that predicted by each of the mentioned empirical models. The results which have been analyzed through the identification of Root Mean Square Error value achieved by each model revealed that the Optimized Cost-231 and Ericson model provide lowest Root Mean Square Error values.
A Propagation Model of Cellular Mobile Radio Communication in Urban Areas
A numerical modeling of the propagation path loss using Uniform Theory of Diffraction (UTD) has been presented here. Computed results at 835 MHZ have been presented for various parameters of interest. The results at 2.154GHz have been obtained and compared with that of Walfish and Bertoni [1]. These are found to be in excellent agreement thereby establishing the validity of the code. Method is simple, efficient and reliable. Both shadow zone and line of sight zone have been considered.
Investigation of Path Loss Models for Mobile Communications in Malaysia
2011
The design of a propagation path loss model requires knowledge of environment characteristics. Quite a number of propagation path loss models for mobile radio communication system were published in the literature. However, choosing the most suitable model for a given geographical and morphographical area is not a simple task because descriptions of terrain and land-use information can vary widely from country to country. Furthermore, Efficiency of present path loss models suffers when they are used in the environment other than for which they have been designed. The Malaysian geographical and morphographical area varies widely from areas where most models were developed. In addition, several studies in Malaysia, Indonesia and others have shown that the known path loss models perform unsatisfactory when compared with measured data. Hence, this prompts the necessity to investigate the models that suit the Malaysian environment conditions. To investigate the path loss models, measureme...
Advances in Electrical and Electronic Engineering
In this research various channel propagation models of wireless communication systems were analysed. There are many types of propagation models that can minutely calculate the path loss in all types of terrain. Performance estimation of different propagation models was analysed using simulations. In the simulations the selected propagation models have been proposed at the operating frequency of 1800 MHz for different receiver antenna heights in urban and rural environments. Simulations were performed using MAT-LAB R2013b. The propagation models depend on location, frequency range and clutter type such as urban, suburban and countryside. It was noticed from the results of the path loss calculation for 2 m, 7 m and 14 m receiver antenna heights in urban environment that COST 231 (W-I) model showed the lowest path loss results (138 dB) as compared with the other models in urban environment. On the contrary, SUI model showed the highest path loss result (166 dB in 2 m receiver antenna height) as compared with the other models in the same environment.
AN ANALYTICAL ANALYSIS OF PATH LOSS MODELS FOR MOBILE CELLULAR WIRELESS COMMUNICATIONS
International Journal on Cybernetics & Informatics , 2020
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 arevital 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.
Investigation into Path Loss Propagation at UHF Band in Low Latitude Region
Knowledge of propagation characteristics in the mobile channel is important to the design of a cellular system. It is a major component in the analysis and design of the link budget of a Telecommunication system. This paper deals with the outdoor path loss bahaviour. The study has been conducted in The Polytechnic, Ibadan at GSM frequency 900MHz so as to fit a suitable propagation model within the campus and environs. The experimental data collected from measurements were compared with Cost 231 Hata model, Erickson model and free space models. The results are in good agreement with Cost 231 Hata model. The accuracy of the results is estimated by determine the mean square error between the measured and estimated path loss of the empirical model. The mean square errors, ? at different height were 2.04, 2.71, 2.90, 1.46, and 1.61dBm. The results are in good agreement with the acceptable international range 1???15dBm (Wu and Yuan, 1998).
Analysis of the indoor propagation losses for the portable phone "Pointel
Proceedings of IEEE Antennas and Propagation Society International Symposium, 1993
The results of power loss measurements for the portable phone "Pointel" operating in the 864 -868 MHz band are presented. These measurements were performed in the frequency domain using a network analyzer. Three indoor environments were considered for propagation experiments. Three methods for the power loss analysis are also described. From the obtained results, the radio coverage with both line-of-sight and obstruction of the direct path is derived.