Terahertz MIMO Fading Analysis and Doppler Modeling in a Data Center Environment

In this paper, we present results from a Terahertz (THz) channel measurement campaign in a data center environment. We analyze propagation parameters, such as pathloss, shadowing gain, and RMS delay spread. Amplitude fading statistics in a 4 × 4 Multiple-Input-Multiple-Output (MIMO) channel are also investigated. Furthermore, Doppler shift in THz bands due to the effect of cooling airflow turbulence, which causes cables (lying in the wireless propagation path) to vibrate is also measured. A two-dimensional (2-D) geometrical propagation model that includes moving scatterers (cables) is introduced. From the 2-D model, a corresponding Doppler power spectrum (DPS) is derived and validated with measured data. This work is pertinent to THz wireless systems design for a data center environment.