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一种用于 OTFS 波形射频干扰的综合实验仿真。

A Comprehensive Experimental Emulation for OTFS Waveform RF-Impairments.

机构信息

Department of Electrical and Electronics Engineering, Karadeniz Teknik Üniversitesi, Trabzon 61080, Turkey.

Department of Electrical and Electronics Engineering, Istanbul Medipol University, Istanbul 34810, Turkey.

出版信息

Sensors (Basel). 2022 Dec 21;23(1):38. doi: 10.3390/s23010038.

DOI:10.3390/s23010038
PMID:36616636
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9824501/
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.

摘要

正交时频空间（OTFS）波形在具有高时间频率色散信道的高速移动环境中超越了正交频分复用（OFDM）面临的挑战。由于射频（RF）损伤直接影响波形行为，本文研究了影响 OTFS 波形性能的 RF 损伤的实验实现，并将其与作为基准的 OFDM 波形进行了比较。首先，分析了双色散信道效应，然后建立了一个实验框架，用于研究包括非线性、载波频率偏移（CFO）、I/Q 不平衡、直流偏移和相位噪声在内的 RF 损伤对 OTFS 波形性能的影响。实验在基于 Keysight EXG X-Series 设备的 2.4GHz 和 5GHz 载波频率的软件定义无线电（SDR）中在真实室内无线环境中进行。在存在 RF 损伤的情况下，OFDM 和 OTFS 的性能比较表明，OTFS 明显优于 OFDM。

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Sensors (Basel). 2022 May 23;22(10):3937. doi: 10.3390/s22103937.