Spectrum Efficiency and Link Reliability Enhancement Algorithm in IRS-Assisted OTFS Systems for Vehicular Networks

IF 4.4 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2025-06-16 DOI:10.1109/LCOMM.2025.3579935

Rong Zeng;Zengxian Lin;Zaichen Zhang;Na Ying;Afeng Yang

引用次数: 0

Abstract

Orthogonal Time Frequency Space (OTFS) modulation offers a promising solution for Vehicle To Everything (V2X) scenarios. In this letter, we present an algorithm that reduces pilot overhead and improves link reliability, which enhances spectral efficiency in IRS (Intelligent Reflecting Surface)-assisted OTFS systems. The method projects received signals onto orthogonal subspaces and performs channel matching within each subspace to minimize pilot overhead. And we utilize the Grey Wolf Optimization (GWO) Algorithm to calculate the channel matching parameters. Additionally, an adaptive pilot overhead reduction(APOR) scheme is presented to further enhance spectral efficiency. Simulation results verify that the proposed methods significantly improve system reliability and throughput rate.

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车载网络红外辅助OTFS系统的频谱效率和链路可靠性增强算法

正交时频空间（OTFS）调制为车辆到一切（V2X）场景提供了一个很有前途的解决方案。在这封信中，我们提出了一种算法，可以减少导频开销并提高链路可靠性，从而提高IRS（智能反射表面）辅助OTFS系统的频谱效率。该方法将接收到的信号投影到正交子空间上，并在每个子空间内进行信道匹配，以最小化导频开销。并利用灰狼优化算法（GWO）计算信道匹配参数。此外，为了进一步提高频谱效率，提出了自适应导频开销降低（APOR）方案。仿真结果表明，该方法显著提高了系统的可靠性和吞吐率。

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

IEEE Communications Letters 工程技术-电信学

CiteScore

8.10

自引率

7.30%

发文量

590

审稿时长

2.8 months

期刊介绍： The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.