Egli Model

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.

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.

Coverage

Frequency: Not specified

Mathematical formulation

Egli model is formally expressed as:

Where,

$G\_B$ = Gain of the base station antenna. Unit: dimensionless

$G\_M$ = Gain of the mobile station antenna. Unit: dimensionless

$h\_B$ = Height of the base station antenna. Unit: meter (m)

$h\_M$ = 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)

Points to note

The equation is scaled for frequency specified in megahertz (MHz).

Limitations

This model predicts the path loss as a whole and does not subdivide the loss into free space loss and other losses.

Further reading

"Introduction to RF propagation," John S. Seybold, 2005, John Willey and Sons Inc.

ee also

Longley Rice Model

ITU Terrain Model

International telecommunication union