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| {{multiple issues|cleanup=October 2011|notability=October 2011|technical=October 2011}}
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| The '''COST-Hata-Model''' is a [[radio propagation model]] that extends the urban [[Hata Model]] (which in turn is based on the [[Okumura Model]]) to cover a more elaborated range of frequencies. It is the most often cited of the COST 231 models (EU funded research project ca. April 1986 - April 1996),<ref>http://www.cost.eu/domains_actions/ict/Actions/231 COST (European Cooperation in Science and Technology) website</ref> also called the ''Hata Model PCS Extension''.<ref>
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| [http://www.lx.it.pt/cost231/final_report.htm Final report for COST Action 231, Chapter 4] | |
| </ref>
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| [[COST]] (COopération européenne dans le domaine de la recherche Scientifique et Technique) is a European Union Forum for cooperative scientific research which has developed this model accordingly to various experiments and researches.
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| ==Applicable To / Under Conditions==
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| This model is applicable to urban areas. To further evaluate Path Loss in Suburban or Rural Quasi-open/Open Areas, this path loss has to be substituted into Urban to Rural/Urban to Suburban Conversions. (Ray GAO, 09 Sep 2007)
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| ==Coverage==
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| *Frequency: 1500 MHz to 2000 MHz
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| *[[Mobile Station]] [[Antenna (radio)|Antenna]] Height: 1 up to 10m
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| *[[Base station]] [[Antenna (radio)|Antenna]] Height: 30m to 200m
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| *Link Distance: 1 up to 20 km
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| ==Mathematical Formulation==
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| The COST-Hata-Model is formulated as,
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| <math>L \; = \; 46.3 \; + \; 33.9\log f \; - \; 13.82 \log h_B \; - \; a(h_R) \; + \; [44.9 \;- \;6.55 \log h_B] \log d \; + \; C </math>
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| For suburban or rural enviorenmments:
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| <math>a(h_R)\;=\;(1.1\log f\;-\;0.7)h_R\;-\;(1.56\log f\;-\;0.8)</math>
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| <math>C \; = \; \begin{cases} 0 \; dB \mbox{ for medium cities and suburban areas} \\ 3 \; dB \mbox{ for metropolitan areas} \end{cases}</math> | |
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| Where,
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| L = [[Median]] [[path loss]]. Unit: [[Decibel]] (dB)
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| f = Frequency of Transmission. Unit: [[Megahertz]] (MHz)
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| h<sub>B</sub> = [[Base Station]] [[Antenna (radio)|Antenna]] [[effective height]]. Unit: Meter (m)
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| d = Link distance. Unit: Kilometer (km)
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| h<sub>R</sub> = [[Mobile Station]] [[Antenna (radio)|Antenna]] [[effective height]]. Unit: Meter (m)
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| a(h<sub>R</sub>) = [[Mobile station]] [[Antenna (radio)|Antenna]] height correction factor as described in the [[Hata Model for Urban Areas]]..
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| ==Points to Note==
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| The European Co-operative for Scientific and Technical research (EUROCOST)
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| formed the COST-231 working committee to develop an extended version
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| of the Hata model. COST-231 proposed the following formula to extend Hata's
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| model to 2 GHz. The proposed model for path loss is
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| L50(urban) = 46.3 + 33.9 log fc - 13.82 log {{Not a typo|hte}} - a (hre) + (44.9 - 6.55 log {{Not a typo|hte}}) log d + Cm
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| where a(hre) is the correction
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| factor for effective mobile antenna height which is a function of the size of
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| the coverage area.
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| 0dB for medium sized city and suburban areas
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| Cm =
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| 3 dB for metropolitan centers
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| The COST-231 extension of the Hata model is restricted to the following
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| range of parameters:
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| f : 1500 MHz to 2000 MHz
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| {{Not a typo|hte}} :3Om to 200m
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| hre :lm to lOm
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| d :lkm to 20 km
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| ==Limitations==
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| This model requires that the base station antenna is higher than all adjacent rooftops.
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| ==References==
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| <references />
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| ==See also==
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| * [[Hata Model for Urban Areas]]
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| * [[Hata Model for Suburban Areas]]
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| * [[Hata Model for Open Areas]]
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| * [[Radio propagation model]]
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| [[Category:Radio frequency propagation]]
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