Indoor path loss variations with frequency and visibility conditions at 3.5 GHz band

Studying the radio wave propagation within indoor environment is necessary previously to deploy wireless networks. Thus, and next to launching 5G systems at 3.5 GHz band, some insights on the behavior of the channel are required. This contribution describes the results of a measurement campaign in three different indoor scenarios, which are representative for a collection of similar environments. A simple path loss exponential decay model, adjusted by the measurement outcomes, indicates the evolution of radio waves as a function of the distance to the transmitter. In line of sight conditions, path loss seems to be just a bit stronger than in open space situations (the exponent is between 2 and 2.5, depending on the frequency, compared to the standard value 2 of open spaces). However, obstructed line of sight condition strengthens this decay rhythm, being over 4.Studying the radio wave propagation within indoor environment is necessary previously to deploy wireless networks. Thus, and next to launching 5G systems at 3.5 GHz band, some insights on the behavior of the channel are required. This contribution describes the results of a measurement campaign in three different indoor scenarios, which are representative for a collection of similar environments. A simple path loss exponential decay model, adjusted by the measurement outcomes, indicates the evolution of radio waves as a function of the distance to the transmitter. In line of sight conditions, path loss seems to be just a bit stronger than in open space situations (the exponent is between 2 and 2.5, depending on the frequency, compared to the standard value 2 of open spaces). However, obstructed line of sight condition strengthens this decay rhythm, being over 4.C