Indoor Office Plan Environment and Layout-Based MmWave Path Loss Models for 28 GHz and 73 GHz

摘要

This paper presents large-scale path loss models based on extensiveultra-wideband millimeter-wave propagation measurements performed at 28 GHz and73 GHz in three typical indoor office layouts -- namely: corridor, open-plan,and closed-plan. A previous study combined all indoor layouts together, whilethis study separates them for site-specific indoor large-scale path loss modelanalysis. Measurements were conducted using a 400 megachips-per-secondbroadband sliding correlator channel sounder with 800 MHz first null-to-null RFbandwidth for 48 transmitter-receiver location combinations with distancesranging 3.9 m to 45.9 m for both co- and cross-polarized antenna configurationsin line-of-sight and non-line-of-sight environments. Omnidirectional path lossvalues were synthesized from over 14,000 directional power delay profiles andwere used to generate single-frequency and multi-frequency path loss models forcombined, co-, and cross-polarized antennas. Large-scale path loss models thatinclude a cross-polarization discrimination factor are provided forcross-polarized antenna measurements. The results show the value of using theclose-in free space reference distance single and multi-frequency path lossmodels, as they offer simplicity (less parameters) in path loss calculation andprediction, without sacrificing accuracy. Moreover, the current 3GPPfloating-intercept path loss model only requires a simple and subtlemodification to convert to the close-in free space reference distance models.