Time-Domain Channel Sounder Calibration at Low Terahertz Band
Tobias Doeker, Johannes M. Eckhardt, Carla E. Reinhardt, Thomas Kürner
Abstract
This article provides a comprehensive overview of calibrating a correlation-based channel sounder designed for the low THz frequency range. The calibration process outlined herein encompasses fundamental aspects, including the calibration of the measured delay and amplitude of the CIR. Specifically, it discusses the influence of the utilized waveguides during a B2B calibration, as well as the effects of antennas, and noise floor estimation. Furthermore, the calibration procedure is enhanced through deconvolution to mitigate the impact of the measurement system itself. Specifically, the discussion addresses the windowing technique applied to the deconvolved signal. Lastly, additional considerations such as averaging, interpolation, MIMO configurations, and high-resolution measurements are discussed.