一种基于OTFS调制的卫星车联网系统与性能评估

摘要：分析了卫星车联网（SIoV）场景的现状及星地信号传播所遇到的问题，研究利用正交时频空（OTFS）调制技术，设计并评估了基于SIoV传播信道的系统性能。此外，深入探讨了该信道在时间-频率域和时延-多普勒域的特性，并指出了OTFS调制的优势。仿真结果表明，OTFS调制在应对具有SIoV特性的信道时展现出卓越的性能稳健性。未来将进一步重点优化基于OTFS调制的系统设计，以便提升SIoV中的高质量通信服务。

关键词：卫星车联网；信道分析；正交时频空；时延-多普勒域

Abstract: The current situation of satellite-based Internet of vehicles (SIoV) scenarios and the problems encountered in signal propagation are analyzed, the use of orthogonal time frequency space (OTFS) modulation technology to design is studied and the system performance based on the SIoV propagation channel is evaluated. Besides, we deeply explore the characteristics of the channel in the time-frequency domain and delay-Doppler domain, and point out the advantages of OTFS modulation. The simulation results show that OTFS modulation exhibits excellent robustness when dealing with channels with SIoV characteristics. Future work will focus on optimizing the system design based on OTFS modulation to further improve high-quality communication services in SIoV.

Keywords: satellite-based IoV; channel analysis; orthogonal time-frequency space division multiplexing; delay-Doppler domain