AI 中文总结
本文比较OTFS与OFDM在移动通信中的性能，发现OTFS在高移动性和多径环境下更优，且非线性均衡器在低中SNR时表现更好。
AI 中文摘要
本文对正交时频空间（OTFS）与正交频分复用（OFDM）调制方案进行了定量性能比较，重点关注移动无线通信场景。我们基于关键通信场景和配置（如移动性水平、调制阶数、多径环境和均衡器）对两种方案进行了评估和比较。该研究系统地确定了OTFS和OFDM各自表现最优的条件。仿真结果表明，在高移动性场景和多径环境中，OTFS始终优于OFDM。根据调制阶数的不同，OTFS与OFDM之间的性能差距可能非常接近，也可能相差多个数量级。此外，在低和中信噪比（SNR）值下，非线性均衡器在OTFS中的表现优于传统线性均衡器。
英文摘要
This paper provides a quantitative performance comparison between Orthogonal Time Frequency Space (OTFS) and Orthogonal Frequency-Division Multiplexing (OFDM) modulation schemes, focusing on mobile wireless communication scenarios. We evaluate and compare both schemes based on critical communication scenarios and configurations such as mobility levels, modulation orders, multipath environments, and equalizers. The study systematically identifies conditions where OTFS and OFDM each exhibit optimal performance. Results from simulations demonstrate that OTFS outperforms OFDM consistently for high mobility scenarios and multipath environments. Depending on the modulation order, the performance gap between OTFS and OFDM might be very close or many orders of magnitude. Moreover, at low and mid values of SNR, the non-linear equalizer performs better than traditional linear equalizers for OTFS.
Journal refXLIII Simpósio Brasileiro de Telecomunicações e Processamento de Sinais (SBrT2025)
DOI：10.14209/sbrt.2025.1571156218
