Power Delay Profile Characterization for THz Communications Link

The use of sub-terahertz and terahertz waves is considered as a frequency band for next-generation wireless communication systems that will enable high-speed communication of tens of Gbps or more, and it is necessary to clarify the radio wave propagation characteristics to design the physical layer of wireless systems. Previously, the authors developed a propagation loss model based on the results of measuring the propagation loss in the 232–500 GHz band in office and data center environments. In this paper, we report on the results of measuring the power-delay profile in a data center and an outdoor environment with wireless signal bandwidths of 2.16 GHz and 5 GHz. We also present analytical results on the rms delay spread and correlation bandwidth, which are important parameters for physical layer design, as an evaluation of the characteristics of the power-delay profile.