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{{multiple issues|cleanup=October 2011|notability=October 2011|technical=October 2011}} | |||
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> | |||
[http://www.lx.it.pt/cost231/final_report.htm Final report for COST Action 231, Chapter 4] | |||
</ref> | |||
[[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. | |||
==Applicable To / Under Conditions== | |||
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) | |||
==Coverage== | |||
*Frequency: 1500 MHz to 2000 MHz | |||
*[[Mobile Station]] [[Antenna (radio)|Antenna]] Height: 1 up to 10m | |||
*[[Base station]] [[Antenna (radio)|Antenna]] Height: 30m to 200m | |||
*Link Distance: 1 up to 20 km | |||
==Mathematical Formulation== | |||
The COST-Hata-Model is formulated as, | |||
<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> | |||
For suburban or rural enviorenmments: | |||
<math>a(h_R)\;=\;(1.1\log f\;-\;0.7)h_R\;-\;(1.56\log f\;-\;0.8)</math> | |||
<math>C \; = \; \begin{cases} 0 \; dB \mbox{ for medium cities and suburban areas} \\ 3 \; dB \mbox{ for metropolitan areas} \end{cases}</math> | |||
Where, | |||
L = [[Median]] [[path loss]]. Unit: [[Decibel]] (dB) | |||
f = Frequency of Transmission. Unit: [[Megahertz]] (MHz) | |||
h<sub>B</sub> = [[Base Station]] [[Antenna (radio)|Antenna]] [[effective height]]. Unit: Meter (m) | |||
d = Link distance. Unit: Kilometer (km) | |||
h<sub>R</sub> = [[Mobile Station]] [[Antenna (radio)|Antenna]] [[effective height]]. Unit: Meter (m) | |||
a(h<sub>R</sub>) = [[Mobile station]] [[Antenna (radio)|Antenna]] height correction factor as described in the [[Hata Model for Urban Areas]].. | |||
==Points to Note== | |||
The European Co-operative for Scientific and Technical research (EUROCOST) | |||
formed the COST-231 working committee to develop an extended version | |||
of the Hata model. COST-231 proposed the following formula to extend Hata's | |||
model to 2 GHz. The proposed model for path loss is | |||
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 | |||
where a(hre) is the correction | |||
factor for effective mobile antenna height which is a function of the size of | |||
the coverage area. | |||
0dB for medium sized city and suburban areas | |||
Cm = | |||
3 dB for metropolitan centers | |||
The COST-231 extension of the Hata model is restricted to the following | |||
range of parameters: | |||
f : 1500 MHz to 2000 MHz | |||
{{Not a typo|hte}} :3Om to 200m | |||
hre :lm to lOm | |||
d :lkm to 20 km | |||
==Limitations== | |||
This model requires that the base station antenna is higher than all adjacent rooftops. | |||
==References== | |||
<references /> | |||
==See also== | |||
* [[Hata Model for Urban Areas]] | |||
* [[Hata Model for Suburban Areas]] | |||
* [[Hata Model for Open Areas]] | |||
* [[Radio propagation model]] | |||
[[Category:Radio frequency propagation]] |
Revision as of 05:15, 1 March 2013
Template:Multiple issues 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),[1] also called the Hata Model PCS Extension.[2]
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.
Applicable To / Under Conditions
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)
Coverage
- Frequency: 1500 MHz to 2000 MHz
- Mobile Station Antenna Height: 1 up to 10m
- Base station Antenna Height: 30m to 200m
- Link Distance: 1 up to 20 km
Mathematical Formulation
The COST-Hata-Model is formulated as,
For suburban or rural enviorenmments:
Where,
L = Median path loss. Unit: Decibel (dB)
f = Frequency of Transmission. Unit: Megahertz (MHz)
hB = Base Station Antenna effective height. Unit: Meter (m)
d = Link distance. Unit: Kilometer (km)
hR = Mobile Station Antenna effective height. Unit: Meter (m)
a(hR) = Mobile station Antenna height correction factor as described in the Hata Model for Urban Areas..
Points to Note
The European Co-operative for Scientific and Technical research (EUROCOST) formed the COST-231 working committee to develop an extended version of the Hata model. COST-231 proposed the following formula to extend Hata's model to 2 GHz. The proposed model for path loss is
L50(urban) = 46.3 + 33.9 log fc - 13.82 log Template:Not a typo - a (hre) + (44.9 - 6.55 log Template:Not a typo) log d + Cm where a(hre) is the correction factor for effective mobile antenna height which is a function of the size of the coverage area.
0dB for medium sized city and suburban areas
Cm =
3 dB for metropolitan centers
The COST-231 extension of the Hata model is restricted to the following
range of parameters:
f : 1500 MHz to 2000 MHz Template:Not a typo :3Om to 200m hre :lm to lOm d :lkm to 20 km
Limitations
This model requires that the base station antenna is higher than all adjacent rooftops.
References
- ↑ http://www.cost.eu/domains_actions/ict/Actions/231 COST (European Cooperation in Science and Technology) website
- ↑ Final report for COST Action 231, Chapter 4