COST Hata model
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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), also called the Hata Model PCS Extension.
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)
- Frequency: 1500–2000 MHz
- Mobile station antenna height: 1–10 m
- Base station Antenna height: 30–200 m
- Link distance: 1–20 km
The COST Hata model is formulated as,
For suburban or rural environments:
And for large cities:
f = Frequency of Transmission. Unit: megahertz (MHz)
d = Link distance. Unit: Kilometer (km)
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 hte – a (hre) + (44.9 – 6.55 log 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.
0 dB for medium-sized city and suburban areas
3 dB for metropolitan centers
The COST-231 extension of the Hata model is restricted to the following
range of parameters:
f : 1500–2000 MHz hte :30m to 200m hre :1m to 10m d :1km to 20 km
This model requires that the base station antenna is higher than all adjacent rooftops.
- 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