The orthogonal time-frequency space (OTFS) waveform exceeds the challenges that face orthogonal frequency division multiplexing (OFDM) in a high-mobility environment with high time-frequency dispersive channels. Since radio frequency (RF) impairments have a direct impact on waveform behavior, this paper investigates the experimental implementation of RF-impairments that affect OTFS waveform performance and compares them to the OFDM waveform as a benchmark. Firstly, the doubly-dispersive channel effect is analyzed, and then an experimental framework is established for investigating the impact of RF-impairments, including non-linearity, carrier frequency offset (CFO), 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) at carrier frequencies of $2.4$ GHz and 5 GHz based on the Keysight EXG X-Series devices. The comparison of the performances of OFDM and OTFS in the presence of RF-impairments reveals that OTFS significantly outperforms OFDM.

Because of its characteristics of low cost, minimal weight and low profile over a wide spectrum of frequencies, in recent years, the use of microstrip patch antennas increased dramatically in many fields especially in satellite, radars and mobile systems. In order to improve some of the features of patch antennas and develop its performance, antenna arrays are generally used in the academic and industry communities. Therefore, in this work, a 1x16 series fed microstrip patch array is designed for the automotive radar systems. The center frequency is 24 GHz and antenna is located on Rogers RO4003 substrate material with εr=3.55 and the thickness of the substrate (h) is 0.508mm. 14.43 dB gain and -18.1 dB side-lobe level (SLL) is obtained using HFSS Ansoft-High Frequency Structure Simulator.