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Millimeter-wave (mmWave) and Terahertz (THz) will be used in thesixth-generation (6G) wireless systems, especially for indoor scenarios. Thispaper presents an indoor three-dimensional (3-D) statistical channel model formmWave and sub-THz frequencies, which is developed from extensive channelpropagation measurements conducted in an office building at 28 GHz and 140 GHzin 2014 and 2019. Over 15,000 power delay profiles (PDPs) were recorded tostudy channel statistics such as the number of time clusters, cluster delays,and cluster powers. All the parameters required in the channel generationprocedure are derived from empirical measurement data for 28 GHz and 140 GHzline-of-sight (LOS) and non-line-of-sight (NLOS) scenarios. The channel modelis validated by showing that the simulated root mean square (RMS) delay spreadand RMS angular spread yield good agreements with measured values. An indoorchannel simulation software is built upon the popular NYUSIM outdoor channelsimulator, which can generate realistic channel impulse response, PDP, andpower angular spectrum.

3-D Statistical Indoor Channel Model for Millimeter-Wave and Sub-Terahertz Bands