Okumura hata model n okumura collected measurement data and plotted a set of curves for path loss in urban areas around 900 mhz n hatacame up with an empirical model for okumura s curves l. This model incorporates the graphical information from okumura model. There are many empirical models for calculating the path loss such as okumura model, hata model, cost231 model and sui model. The hata model for urban areas, also known as the okumurahata 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 propagation in built up areas. Page 1 khalidbashir 12107 ahrar hussain 122 tayyab khan 12 asad iqbal 12162 2. The hata model is empirical formulation of graphical path loss pl data. The new model obtained can help increase the performance of mobile radio systems deployed in our territory. A better example is we can define rural area with okumura hata model, but we cannot define poor area with it. Cost231 hata extension the cost231 hata model extends the hata cellular models another 500mhz up to 2000mhz so is well suited to gsm1800 in urban areas.
The model served as a base for the hata model okumura model was built into three modes. The main equation of hata urban model is modified by substituting the suburban. The results of these models compared with actual measured data. The result obtained clearly depicts that the okumura hata model predicts better even with increasing distances from the base transceiver stations. The okumura model is a radio propagation model that was built using the data collected in the city of tokyo, japan. Pathloss determination using okumurahata model and. Our path loss calculator provides an easy to use interface to. The results of comparison show that the ecc33 model suitable for a suburban environment.
The hata model is an empirical formulation of the graphical path loss data provided by. Essentially, in all the three performance measures used, the composite function of prediction residual based tuning approach performed better than the rmse based tuning approach. The standard propagation model is a propagation model based on hata formula and is suited for predictions in 150 to 3500 mhz band over long distance from one to 20km. In a practical wireless channel propagation scenario, we want to consider a model which gives you a signal strength as a function of distance. Lecture 7okumura and hata macroscopic propagation models. It is recommended for macrocells in urban and suburban scenarios, showing very good results for path loss calculations for base station antennas located above the average roof height. This model has been proven to be accurate and is used by computer simulation tools. This will ask for antenna heights then ask u for the frequency bandthen it will use the okumura model and give u the simulated output. Okumura hata model n okumura collected measurement data and plotted a set of curves for path loss in urban areas around 900 mhz n hatacame up with an empirical model for okumura s curves l p 69. As with most largescale radio wave propagation models, the free space model predicts that received. Comparison among different large scale path loss models for. In the first form, the pathloss in db is written as. Lte network planning using the hataokumura and the. His paper takes a look at some of the radio propagation models used in designing radio channels, and gives a.
Okumurahata propagation model tuning through composite. Contribution to the performance of mobile radio systems by. The hata model for urban areas also known as the okumura hata model, is a widely used propagation model for predicting path loss in urban areas. Pdf pathloss determination using okumurahata model and. Okumura hata model today is one of the most widely used empirical propagation prediction models. Comparison of okumura, hata and cost231 models on the. The model provides good path loss estimates for large urban cells.
C is 0 in small and mediumsized cities urban areas, and suburban areas. The main result of okumura s work was a set of curves, giving the median attenuation, relative to free space, as a function of frequency, distance. Using gis on rf to integrate geographic with other corporate data has become absolutely vital to this task. Since some of the working frequencies of the lte networks are 2. Pathloss determination using okumura hata model and cubic regression for missing data for oman. These existing path loss models are hata s model, lees model, sui model and egli model. Therefore, in the actual lte system design, the standard cost231 hata model must be corrected based on the cw test result. Then he applied several correction factors for other propagation conditions, such as. On the use of the universal okumurahata propagation.
The model is ideal for using in cities with many urban structures but not many tall blocking structures. On the other hand, the rmse tuned okumura hata model has a higher rmse value of 5. In this video explanation to numerical on okumura and hata model has been explained here. Hata model simulation file exchange matlab central. This video describes two of the most widely used outdoor propagation model, as okumura and hata. Theoretical simulation by okumura hata model and the obtained experimental data is compared and analyzed further using a cubic regression on the set of the experimental data. Rician kratio k direct power c22 over scattered power measured values.
Okumura model from wikipedia, the free encyclopedia the okumura model is a radio propagation model that was built using the data. Need to average the received power measurements to remove multipath effects local mean attenuation lma at distance d. An improved propagation prediction model based on okumura. The cost hata model is a radio propagation model i. On the basis of extensive measurements carried out in tokyo at frequencies in the range of 100 mhz to 1920 mhz, okumura et al. Pathloss determination using okumurahata model and cubic regression for missing data for oman. Pathloss determination using okumurahata model and cubic. The mean square error mse was calculated between measured path loss values and those predicted on basis of okumurahata model for a suburban area. The socalled okumura hata curve is an approximation of radio wave propagation characteristics based on aggregated data obtained in actual tests of propagation characteristics between a base station and mobile stations in various areas, such as open land, suburbs, a medium city, and a large city. Widely used propagation models are okumura hata propagation model, cost hata propagation model, itu5293 propagation model and so on. Comparison of empirical propagation path loss models for fixed. Page 2 hata model the term hata model refers to a radio propagation model that is based on the okumura model.
The two models or their modified version are frequently used throughout commercially available rf engineering tools. This page describes okumura hata model basics, hata model formula and cost231 extension of okumura hata model. Cost 231 hata model extends the validity region of okumura hata model to 1500 2000 mhz range which encompass the 1800 mhz frequency which is used for 2g and 3g cellular systems. Pathloss determination using okumurahata model for rourkela by ashish ekka has been carried out under my supervision in partial fulfillment of the requirements for the degree of bachelor of. In the same way qos parameters behavioural patterns, also have to be taken into consideration for complete definition of an ict area. Hata path loss model the hata model is based on okumura s measurements in. The hata model is a radio propagation model for predicting the path loss of cellular transmissions in exterior environments, valid for microwave frequencies from 150 to 1500 mhz. Okumura model simulation file exchange matlab central. In todays competitive world, a successful utility must take maximum advantage of its resources, from people to equipment to information. Modified equation was also reverified for another cell in an open area in oman and gave acceptable results. These path loss models were developed empirically in the system with similar antenna heights and frequency ranges which are applicable to the cdma network in benin city.
A radio system is built according to the mycomsats. The hata model is a radio propagation model for predicting the path loss of cellular. Okumura hatta model is not sufficient to define the area, but qos model is also required. The cost 231 model 12 is a semiempirical path loss model, resulting from the combination of walfischbertoni 3 and ikegami 4 models. This paper proposes an improved propagation prediction model based on the okumura hata model, considering the effect of ductile diffraction in the hilly terrain environment. Hata model was used and validated in the putrajaya region to detect the relative error to evaluate its efficiency. Okumura hata model is one of the most popular models for predicting macrocell path loss in a general flat terrain, but is poor in the mountainous terrain. It is an empirical formulation based on the data from the okumura model, and is thus also commonly referred to as the okumura hata model. Okumura model for urban areas is a radio propagation model that was built using the data collected in the city of tokyo, japan. Hata okumura model the hata okumura model is best suited for large cell coverage distances up to 100 km and it can extrapolate predictions up to the 2ghz band. In 3 authors gave a brief introduction to loss models, concluding that each model is suitable for a specific environment. Antenna height and carrier frequency suburban, quasiopen space, open space, or hilly terrain areas diffraction loss due to mountains sea or lake areas road slope hata derived empirical formulas for the median path loss l50 to fit okumura curves.
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