One Woodland Terminal Model
Encyclopedia
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
.
Where,
Av = 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)
= Specific Attenuation for short vegetations. Unit: Decibel / meter (dB/m)
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.
Itu
Itu is an old and historic municipality in the state of São Paulo in Brazil. The population in 2009 was 157,384 and the area is 641.68 km². The elevation is 583 m. This place name comes from the Tupi language, meaning big waterfall. Itu is linked with the highway numbered the SP-75 and are flowed...
Terrestrial Model for One Terminal in Woodland is a Radio propagation model
Radio propagation model
A radio propagation model, also known as the Radio Wave Propagation Model or the Radio Frequency Propagation Model, is an empirical mathematical formulation for the characterization of radio wave propagation as a function of frequency, distance and other conditions...
belonging to the class of Foliage models. This model is a successor of the Early ITU Model
Early ITU Model
The ITU Vegetation Model is a radio propagation model that estimates the path loss encountered due to the presence of one or more trees inside a point to point telecommunication link...
.
Applicable To / Under Conditions
Applicable to the scenario where one terminal of a link is inside foliage and the other end is free.Mathematical Formulation
The mathematical formulation of the model is:Where,
Av = Attenuation due to Vegetation. Unit: Decibel
Decibel
The decibel is a logarithmic unit that indicates the ratio of a physical quantity relative to a specified or implied reference level. A ratio in decibels is ten times the logarithm to base 10 of the ratio of two power quantities...
(dB)
A = Maximum Attenuation
Attenuation
In physics, attenuation is the gradual loss in intensity of any kind of flux through a medium. For instance, sunlight is attenuated by dark glasses, X-rays are attenuated by lead, and light and sound are attenuated by water.In electrical engineering and telecommunications, attenuation affects the...
for one terminal caused by a certain foliage. Unit: Decibel
Decibel
The decibel is a logarithmic unit that indicates the ratio of a physical quantity relative to a specified or implied reference level. A ratio in decibels is ten times the logarithm to base 10 of the ratio of two power quantities...
(dB)
d = Depth of Foliage along the path. Unit: Meter(m)
= Specific Attenuation for short vegetations. Unit: Decibel / meter (dB/m)Points to Note
The value of 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.