Egli Model
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Egli Model is a terrain model for radio frequency propagation. This model predicts the total path loss for a point-to-point link. Typically used for Line of Sight transmission, this model provides the path loss as a single quantity.
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[edit] Applicable to/under conditions
- Typically suitable for cellular communication scenarios where one antenna is fixed and another is mobile.
- Egli model is applicable to the scenario where the transmission has to go over an irregular terrain.
- Egli model is not applicable to a scenario where some vegetative obstruction is in the middle of the link.
[edit] Coverage
Frequency: Not specified
[edit] Mathematical formulation
Egli model is formally expressed as:
![L = G_B G_M \big[\frac{h_B h_M}{d^2}\big] ^2 [{\frac{40} {f}}]^2](../../../../math/8/f/5/8f5db9bc96e3c8299ab66b4727cebe50.png)
Where,
GB = Gain of the base station antenna. Unit: dimensionless
GM = Gain of the mobile station antenna. Unit: dimensionless
hB = Height of the base station antenna. Unit: meter (m)
hM = Height of the mobile station antenna. Unit: meter (m)
d = Distance from base station antenna. Unit: meter (m)
f = Frequency of transmission. Unit: megahertz (MHz)
[edit] Points to note
The equation is scaled for frequency specified in megahertz (MHz).
[edit] Limitations
This model predicts the path loss as a whole and does not subdivide the loss into free space loss and other losses.
[edit] Further reading
Introduction to RF propagation, John S. Seybold, 2005, John Willey and Sons Inc.
[edit] See also
Longley Rice Model
