Median Field Strength Predictions
Based on an underlying propagation model such as Plane Earth Model or Longley Rice Model etc., this tool predicts RF Coverage of a radio system in a prescribed area where the statistical calculations are made for the median field strength receive signal level at each terrain point. This tool may be used to predict RF Coverage of a single site or combination of multiple sites in a given cluster. It assigns different colors to indicate different ranges of receive signal level such as > -65 dBm, -65 dBm to -80 dBm and -80 dBm to -95 dBm as follows:
'+' > -65 dBm
'+' -65 dBm to -80 dBm
'+' -80 dBm to -95 dBm
RF Propagation simply means the transmission of radio signals from the transmitter output to the receiver. The propagation model takes into account the effects of the surrounding terrain, diffraction loss, foliage loss, and other system elements based on designer input parameters such as site coordinates, ground elevation, antenna type, azimuth, transmitter power, transmitter antenna height and receiver antenna height. RF predictions are made at the desired level of coverage reliability for the intended objectives such as 95%, 90% or 80% level. For example 95% coverage would mean that it is statistically possible to establish a radio link 95% of the time. This type of system parameters are selected by designers based on Raleigh Fading or Log Normal Fading models etc
RF Coverage plots are done separately for down-link (a.k.a. Talk-Out) for base station to mobile and up-link (a.k.a. Talk-Back) from the mobile to the fixed base station. The predicted receive signal level (a.k.a. RSSI - Received Signal Strength Indicator) is calculated and plotted along with the roadmap helps to assess the coverage holes and adjust the systems design parameter accordingly.
For RF Coverage Plotting services, please visit RF Propagation Analysis Tool page and submit your system design parameters by filling out all the applicable fields. We will perform the analysis and the results of your data will be emailed to you within 24 hours.
Please note that currently we are offerring this service on a limited basis for US customers only.