Comparison of Sub-THz Radio Channel Characteristics at 158 GHz and 300 GHz in a Shopping Mall Scenario

This paper compares the sub-THz radio channel characteristics at 158 GHz and 300 GHz in a shopping mall scenario by extracting three different path loss models and various channel parameters. The path loss models extracted are two single frequency models, that include the close-in (CI) and floating-intercept (FI) model, and the alpha-beta-gamma (ABG) model being a multi frequency model. The extracted channel parameters include K-factor, delay spread and angular spread. The extraction of mentioned models and parameters is based on two measurement campaigns executed at the mentioned center frequencies in the same shopping mall like environment with a time-domain correlative channel sounder. The subsequent comparison gives an assessment on the extracted path loss models and the multipath behaviour of the sub-THz radio channel. The paper presents for the first time a comparison between a D-band and H/J-band channel measurements taken both in the same shopping mall environment.