  This paper presents a new large-scale propagation path loss model to design a
fifth-generation (5G) wireless communication system for indoor environments.
Simulations for the indoor environment, for all polarization at
non-line-of-sight (NLOS) and line-of-sight (LOS), which are performed per meter
over a distance of 47 m between each of the separated transmitter antenna (TX)
and the receiver antenna (RX) positions to compare better the proposed
extensive flexible path loss model with previous models. All the simulations
are conducted at the Abu-rayhan buildings at the Amirkabir University of
Technology. The results demonstrated that the simple presented model with a
single parameter denoted ZMS can predict the expansive path loss over distance
more accurately. The values of the path loss exponent (PLE) for the LOS
scenario are simulated and achieved at 3.63, 1.81, and 3.42 for the V-H, V-V,
and V-Omni antenna polarizations, and for NLOS is 6.11, 4.21, and 5.23 at the
28 GHz frequency for all the polarization antenna type V-H, V-V, and V-Omni,
appropriately.
