Ray-Tracing Based Multi-Frequency Large-Scale Channel Characterization for Indoor Millimeter Wave Communications

The millimeter wave has received extensive attention because of its abundant spectrum resources. However, millimeter wave wireless communication systems face problems such as large frequency differences, small coverage areas, and high deployment costs. Therefore, it is urgent to complete millimeter wave wireless channel measurement and modeling for multiple scenarios. This paper first introduces the mainstream 5G millimeter wave candidate frequency bands and application scenarios. Then, based on the commercial ray-tracing simulation tools, the large-scale propagation characteristics for the indoor millimeter wave channel across multiple typical frequency bands are investigated. Finally, simulation results show that the large-scale path loss and angle spread strongly depend on carrier frequencies and antenna positions.