28 GHz propagation analysis for passive repeaters in NLOS channel environment

This paper presents an extensive indoor radio propagation characteristics at 28 GHz office environment. A full 3D ray tracing simulation results are compared with measurement results and features high correlation. Means of differences between simulation and measurement are 5.13 dB for antenna 1 and 4.51 dB for antenna 2, and standard deviations are 4.03 dB and 3.11 dB. Furthermore novel passive repeaters in both indoor and outdoor environments are presented and compared. The ray tracing simulation procedures for repeaters are introduced and the simulation results are well matched with measured results.