LongleyRice
Longley-Rice propagation model
Description
Model the behavior of electromagnetic radiation from a point of transmission over
irregular terrain, including buildings, by using the Longley-Rice model, also known at the
Irregular Terrain Model (ITM). For more information about the model, see [1]. Represent the model by using a
LongleyRice
object.
The Longley-Rice model:
Is designed for frequencies from 20 MHz to 20 GHz, distances from 1 to 2000 km, and antenna heights from 0.5 to 3000 m.
Calculates path loss from free-space loss, terrain and obstacle diffraction, ground reflection, atmospheric refraction, and tropospheric scatter.
Provides path loss estimates by combining physics with empirical data statistics.
To predict path loss in scenes that feature buildings, such as urban environments,
consider using a ray tracing propagation model. For more information about ray tracing models,
see RayTracing
.
Note
The LongleyRice
object implements the point-to-point mode of the
model, which uses terrain data to predict the loss between two points.
Creation
Create a LongleyRice
object by using the propagationModel
function.
Properties
Examples
More About
References
[1] Hufford, George A., Anita G. Longley, and William A.Kissick. A Guide to the Use of the ITS Irregular Terrain Model in the Area Prediction Mode. NTIA Report 82-100. National Telecommunications and Information Administration, April 1, 1982.
[2] Seybold, John S. Introduction to RF Propagation. Hoboken, N.J: Wiley, 2005.
Version History
Introduced in R2019b