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Dipole Antenna
Feed-point Connector for Inverted V Dipole Antenna
Area to Area Lee Model
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Lee Model for Area-to-Area Mode is a Radio propagation model that operates around 900 MHz. Built as two different modes, this model includes an adjustment factor that can be adjusted to make the model more flexible to different regions of propagation.
Contents
Applicable to/under conditions
This model is suitable for using in data collected in a specific area. The model predicts the behaviour of all links that has ends in specific areas.
Coverage
Frequency: 900 MHz Band
Mathematical formulation
The model
The Lee Model is formally expressed as:
where,
L = The median path loss. Unit: decibel (dB)
L0 = The reference path loss along 1 km. Unit: decibel] (dB)
= The slope of the path loss curve. Unit: decibels per decade
d = The distance on which the path loss is to be calculated.
FA = Adjustment factor.
Calculation of reference path loss
The reference path loss is usually computed along a 1 km or 1 mile link. Any other suitable length of path can be chosen based on the applications.
where,
GB = Base station antenna gain. Unit: decibel with respect to isotropic antenna (dBi)
? = Wavelength. Unit: meter (m).
GM = Mobile station antenna gain. Unit: Decibel with respect to isotropic antenna (dBi).
Calculation of adjustment factors
The adjustment factor is calculated as:
where,
FBH = Base station antenna height correction factor.
FBG = Base station antenna gain correction factor.
FMH = Mobile station antenna height correction factor.
FMG = Mobile station antenna gain correction factor.
FF = Frequency correction factor
The base station antenna height correction factor
where,
hB = Base station antenna height. Unit: meter (m).
or
where,
hB = Base station antenna height. Unit: foot (ft).
The base station antenna gain correction factor
where,
GB = Base station antenna gain. Unit: decibel with respect to half wave dipole antenna (dBd)
The mobile station antenna height correction factor:
where,
hM = Mobile station antenna height. Unit: meter(m).
The mobile antenna gain correction factor
where,
GM = Mobile station antenna gain. Unit: Decibel with respect to half wave dipole antenna (dBd).
The frequency correction factor
where,
f = Frequency. Unit: megahertz (MHz)
See also
Hata Model for Urban Areas
Hata Model for Suburban Areas
Hata Model for Open Areas
Okumura Model for Urban Areas
COST 231 Model
Young Model
Point to Point Lee Model
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