Capacity and outage analysis of SM-OTFS system with imperfect CSI in V2V communications

IF 5.8 2区计算机科学 Q1 TELECOMMUNICATIONS

Vehicular Communications Pub Date : 2025-05-05 DOI:10.1016/j.vehcom.2025.100931

Zhiquan Bai , Runlai Wang , Yingchao Yang , Huili Hu , Jingxin Li , Xiao Zhou , Chengyou Wang , Jian Dai

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引用次数: 0

Abstract

With the continuous emergence of high-mobility communication scenarios, such as the Internet of Vehicles (IoV) and Vehicle to Vehicle (V2V) communications, more unique challenges have appeared in mobile communications, due to the severe Doppler frequency shift and fast time-varying channel caused by high mobility. Meanwhile, the moving speed, data volume, and quality of service are becoming more and more important in V2V communications. Providing efficient and reliable wireless communication services to high-mobility users has become a critical issue. Spatial modulation (SM) based orthogonal time frequency space (OTFS) (SM-OTFS) system can improve the reliability and effectiveness of V2V communications because of the excellent Doppler shift resistance of OTFS modulation and the low complexity of SM transmission. In this paper, considering the case that achieving perfect channel estimation is really challenging in actual situation, we derive and analyze the capacity and outage performance of the SM-OTFS system under the circumstance of ideal pulse and imperfect channel state information (CSI) based on the statistical probability and the delay-Doppler domain (DD) input-output relationship. Our theoretical analysis and derivation are approved by the numerical results. Moreover, we also demonstrate the effect of the number of resolvable multipaths, the error of channel estimation, and the different moving speeds on the performance of the SM-OTFS system in V2V communications.

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V2V通信中CSI不完善的SM-OTFS系统容量及中断分析

随着车联网（IoV）、车对车通信（V2V）等高移动性通信场景的不断出现，高移动性带来的多普勒频移严重、信道时变快，给移动通信带来了更多独特的挑战。同时，移动速度、数据量和服务质量在V2V通信中变得越来越重要。为高移动性用户提供高效、可靠的无线通信服务已成为一个关键问题。基于空间调制（SM）的正交时频空间（OTFS）（SM-OTFS）系统由于OTFS调制具有良好的抗多普勒频移性能和较低的传输复杂度，可以提高V2V通信的可靠性和有效性。考虑到在实际情况中实现完美信道估计的难度较大，本文基于统计概率和时延-多普勒域（DD）输入输出关系，推导并分析了理想脉冲和不完全信道状态信息（CSI）情况下SM-OTFS系统的容量和中断性能。我们的理论分析和推导得到了数值结果的验证。此外，我们还演示了可解析多径数量、信道估计误差和不同移动速度对SM-OTFS系统在V2V通信中的性能的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Vehicular Communications Engineering-Electrical and Electronic Engineering

CiteScore

12.70

自引率

10.40%

发文量

审稿时长

62 days

期刊介绍： Vehicular communications is a growing area of communications between vehicles and including roadside communication infrastructure. Advances in wireless communications are making possible sharing of information through real time communications between vehicles and infrastructure. This has led to applications to increase safety of vehicles and communication between passengers and the Internet. Standardization efforts on vehicular communication are also underway to make vehicular transportation safer, greener and easier. The aim of the journal is to publish high quality peer–reviewed papers in the area of vehicular communications. The scope encompasses all types of communications involving vehicles, including vehicle–to–vehicle and vehicle–to–infrastructure. The scope includes (but not limited to) the following topics related to vehicular communications: Vehicle to vehicle and vehicle to infrastructure communications Channel modelling, modulating and coding Congestion Control and scalability issues Protocol design, testing and verification Routing in vehicular networks Security issues and countermeasures Deployment and field testing Reducing energy consumption and enhancing safety of vehicles Wireless in–car networks Data collection and dissemination methods Mobility and handover issues Safety and driver assistance applications UAV Underwater communications Autonomous cooperative driving Social networks Internet of vehicles Standardization of protocols.