One woodland terminal model

The ITU terrestrial model for one terminal in woodland is a radio propagation model belonging to the class of foliage models. This model is a successor of the early ITU model.

Applicable to/under conditions

Applicable to the scenario where one terminal of a link is inside foliage and the other end is free.

Coverage

Frequency: below 5 GHz
Depth of foliage: unspecified

Mathematical formulation

The mathematical formulation of the model is:

$A_{v}\;=\;A\;[1\;-\;e^{-}{\frac {d\gamma }{A}}]$

Where,

A_v = Attenuation due to vegetation. Unit: decibel (dB)

A = Maximum attenuation for one terminal caused by a certain foliage. Unit: decibel (dB)

d = Depth of Foliage along the path. Unit: Meter(m)

$\gamma \;$ = Specific attenuation for short vegetations. Unit: decibel/meter (dB/m)

Points to note

The value of $\gamma$ is dependent on frequency and is an empirical constant.

The model assumes that exactly one of the terminals is located inside some forest or plantation and the term depth applies to the distance from the terminal inside the plantation to the end of plantation along the link.

v t e Radio frequency propagation models
Free space	Free-space path loss Friis transmission equation Dipole field strength in free space
Terrain	ITU terrain model Egli model Longley–Rice Irregular Terrain Model (ITM) Two-ray ground-reflection model
Foliage	Weissberger's model Early ITU model One woodland terminal model Single vegetative obstruction model
Urban	Okumura model Hata model COST Hata model Young model Six-rays model Ten-rays model
Indoor	ITU model for indoor attenuation Log-distance path loss model
Other	VOACAP (HF) Area-to-area Lee model (900 MHz) Point-to-point Lee model (900 MHz) Longley–Rice model (20 MHz - 20 GHz)

One woodland terminal model

Applicable to/under conditions

Coverage

Mathematical formulation

Points to note

See also

Further reading