Harman Patil (Editor)

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.

Contents

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: 1500–2000 MHz
  • Mobile station antenna height: 1–10 m
  • Base station Antenna height: 30–200 m
  • Link distance: 1–20 km

    • Mathematical formulation

    The COST Hata model is formulated as,

    L = 46.3 + 33.9 log ⁡ f − 13.82 log ⁡ h B − a ( h R , f ) + [ 44.9 − 6.55 log ⁡ h B ] log ⁡ d + C

    For suburban or rural environments:

    a ( h R , f ) = ( 1.1 log ⁡ f − 0.7 ) h R − ( 1.56 log ⁡ f − 0.8 )

    C = { 0 d B  for medium cities and suburban areas 3 d B  for metropolitan areas

    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 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

    Cm =

    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 :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

    COST Hata model Wikipedia
    (Text) CC BY-SA


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