Basic RF Propagation Models for LTE
An RF propagation model is a mathematical formula used to characterize the radio is Wave transmitter at one end and the other end into the receiver propagation between It is usually a path RF frequency, distance, antenna heights of the terrain, Clutter and other conditions.
It’s all in the exact damage to telecommunication systems is difficult to Mathematical equations of variations, as barriers, atmospheric conditions and Other phenomena being observed will result in different behavior. as a result, various Propagation behavior in the model to meet the needs of realizing has been developed for Different conditions. for example, the various conditions that can model promotion Account includes: outdoor or indoor, rain, leaves, or terrain, for the effects of And the city density (urban, suburban and rural).
Radio propagation RF system designs used in wide-area models are usually empirical Nature, which means they are developed on the basis of the data gathered for the vast collection of an empirical model to a specific scenario, should be a sufficiently large amount All situations that could be collected to cover the typical scenario. like all Empirical models, radio propagation models do not provide a link to the exact behavior. Rather, they most likely practice referred to under link can perform predictions Terms.
In the area of empirical observations or measurements the model usually are based on the Pathloss delay, or other channel features stretched measure. the empirical model Widely used in mobile radio and cellular systems engineering. many cellular Operators measure or drive-running programs that collect There are signs, which then call quality and network performance measurement Tune your RF system empirical models the propagation planning tool used to use.
Propagation model RF link budget received in conjunction with a Based upon pathloss acceptable radius from the site link budget. Empirical, also sometimes referred to statistical dissemination model, are used as Within different environments to give quick estimates budgetary radii site design and Eventually the number of sites required for a system to estimate a level of budgetary Design of categorized as a certain different will make broad assumptions Environment (e.g. urban or suburban) and terrain as flat.
Many RF Propagation factors which extend or restrict coverage of a Site (e.g. proximity to buildings, the actual terrain, antenna heights, topology, morphology, Etc.). More detailed propagation models, which include some or all of these factors, Produce more accurate predictions of radii site. the following sections give more Concerning statistical propagation models.
It is necessary to calculate when the signal strength a site assessment, Besides, at regular intervals from BTS calculations must be performed Signal strength as the BTS to map each radial arm regularly with an The function of the distance from BTS. RF planning tools are required to Pathloss and each site to predict the required coverage for thousands of calculations.
Planning tool site, with all the details can be fed such as:
- Types of terrain
- Antenna heights
This is a need to provide the necessary number of right can perform calculations Picture of promotion of the site paths. Many planning tools are available in the market, and it is up to the operators and Systems Designer tool.