A Novel Full Path-Loss Model for a Street Crossing in Urban Microcells

Based on the wideband multi-input multi-output (MIMO), channel measurements carried out in downtown Helsinki, Finland, with 11 measurement routes at 3 base station (BS) sites, a full path-loss model including transition region is developed for urban microcells with Manhattan street blocks. The carrier frequency was 5.3 GHz with 100 MHz bandwidth. The size of a transition region is about 7-10 times of the first Fresnel radius with 15-23 m street widths. The model can continuously predict the path-loss when a mobile station (MS) is turning a street crossing from the line-of-sight (LOS) to non-LOS (NLOS) routes. Moreover, the proposed path-loss model is validated by an independent measurement carried out in downtown Oulu, Finland, for urban microcells at the same carrier frequency and bandwidth. By comparison with the measurement results obtained in both Helsinki and Oulu downtowns, it is found that the proposed path-loss model in this communication is more accurate in most of the measured routes, and it is also concise and easy to be implemented for coverage prediction in urban microcells.