Comparison of ray tracing simulations and channel measurements at mmWave bands for indoor scenarios

Accurate characterization of spatial multipath channels at millimeter wave bands is important for system design and performance evaluation of future wireless systems. Channel measurements were conducted at two representative indoor scenarios at 26–30 GHz, i.e., a large unfurnished basement and a small furnished indoor office. A vector network analyzer connected to a rotational directional horn antenna was used in the measurements. Angle-of-arrivals and delay-of-arrivals of the multipath components were obtained from the measurements and compared with ray tracing simulations. Excellent agreement is achieved for the unfurnished basement scenario, where the same clusters were identified in the ray tracing simulations. As for the small furnished office scenario, all the dominant paths are identified as well in the ray tracing simulation, although richer multipath components in the measurement are present.