Abstract
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.
Funder
Scientific and Technological Research Council of Turkey
Subject
Electrical and Electronic Engineering,Biochemistry,Instrumentation,Atomic and Molecular Physics, and Optics,Analytical Chemistry
Reference54 articles.
1. Cisco Visual Networking Index (2019). Forecast and Trends, 2017–2022 White Paper, Cisco Systems Inc.
2. Flexible radio access beyond 5G: A future projection on waveform, numerology, and frame design principles;Ankarali;IEEE Access,2017
3. Modulation options for OFDM-based waveforms: Classification, comparison, and future directions;Jaradat;IEEE Access,2019
4. Zegrar, S.E., and Arslan, H. (2022). Common CP-OFDM Transceiver Design for Low-Complexity Frequency Domain Equalization. IEEE Wirel. Commun. Lett.
5. Doğan-Tusha, S., and Arslan, H. (2020). 6G Vision: An Ultra-Flexible Radio Access Technology Perspective. arXiv.
Cited by
5 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献