A Comprehensive Experimental Emulation for OTFS Waveform RF-Impairments

被引：8

作者：

Abushattal, Abdelrahman ^{[1
]}

Zegrar, Salah Eddine ^{[2
]}

Yazgan, Ayhan ^{[1
]}

Arslan, Huseyin ^{[2
]}

机构：

[1] Karadeniz Tech Univ, Dept Elect & Elect Engn, TR-61080 Trabzon, Turkiye

[2] Istanbul Medipol Univ, Dept Elect & Elect Engn, TR-34810 Istanbul, Turkiye

来源：

SENSORS | 2023年 / 23卷 / 01期

关键词：

OTFS; OFDM; RF-impairments; I; Q imbalances; DC-offset; phase noise; carrier frequency offset; AVERAGE POWER RATIO; CHANNEL ESTIMATION; MODULATION; IMBALANCE; PHASE;

D O I：

10.3390/s23010038

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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.

引用

页数：21

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