  Orthogonal time-frequency space (OTFS) waveform exceeds the challenges that
face orthogonal frequency division multiplexing (OFDM) in the high-mobility
environment with high time-frequency dispersive channels. Since practical pulse
shaping design and RF-impairments effects have a direct impact on waveform
behavior, this paper investigates experimental implementation for practical
pulse shaping design and RF-impairments that affect OTFS waveform performance
and compares them to OFDM waveform as a benchmark. Firstly, the
doubly-dispersive channel effect is analyzed, then an experimental framework is
established for investigating the RF-impairments include non-linearity, Carrier
frequency offset, I/Q-imbalances, DC-offset, and phase noise are considered.
The experiments were conducted in a real indoor wireless environment using
software-defined radio (SDR)based on the Keysight EXG X-Serie devices. The
experimental results validate the accuracy of the theoretical results.
