Outage probability and diversity analysis of OTFS in AF and DF cooperative communication systems

IF 4 3区计算机科学 Q1 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE

Computers & Electrical Engineering Pub Date : 2025-06-23 DOI:10.1016/j.compeleceng.2025.110516

Annette James, Ananth A.

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引用次数: 0

Abstract

The outage probability of orthogonal time frequency space (OTFS) in amplify and forward (AF) and decode and forward (DF) cooperative communication is investigated in this paper. The system setup involves a source node (S), an intermediate node (I), and a destination node (D). A half-duplex forwarding protocol is utilized, featuring two communication links: one direct link between the source and the destination, and one indirect link through the intermediate node. Closed-form expressions for the outage probability are derived for both AF and DF schemes. Additionally, an analysis of their diversity order is also conducted. The diversity order for both AF and DF schemes is found to be

K

, where

K

represents the number of multipaths. Thus, OTFS-based cooperative transmissions are capable of achieving complete channel diversity. Furthermore, the performance of OTFS AF and DF is compared with that of OFDM, GFDM and AFDM for AF and DF, demonstrating that OTFS outperforms OFDM and GFDM in terms of outage probability. The theoretical results are validated through Monte Carlo simulations.

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AF和DF协同通信系统中OTFS的中断概率和分集分析

研究了放大转发（AF）和解码转发（DF）协同通信中正交时频空间（OTFS）的中断概率。系统设置包括一个源节点(S)、一个中间节点(I)和一个目标节点(D)。采用半双工转发协议，具有两条通信链路：一条是源和目的之间的直接链路，另一条是通过中间节点的间接链路。导出了AF和DF两种方案的停电概率的封闭表达式。此外，还对它们的多样性顺序进行了分析。发现AF和DF方案的分集顺序都为K，其中K表示多路径的数量。因此，基于otfs的合作传输能够实现完全的信道分集。此外，将OTFS的AF和DF性能与OFDM、GFDM和AFDM的AF和DF性能进行了比较，表明OTFS在中断概率方面优于OFDM和GFDM。通过蒙特卡罗仿真验证了理论结果。

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

Computers & Electrical Engineering 工程技术-工程：电子与电气

CiteScore

9.20

自引率

7.00%

发文量

661

审稿时长

47 days

期刊介绍： The impact of computers has nowhere been more revolutionary than in electrical engineering. The design, analysis, and operation of electrical and electronic systems are now dominated by computers, a transformation that has been motivated by the natural ease of interface between computers and electrical systems, and the promise of spectacular improvements in speed and efficiency. Published since 1973, Computers & Electrical Engineering provides rapid publication of topical research into the integration of computer technology and computational techniques with electrical and electronic systems. The journal publishes papers featuring novel implementations of computers and computational techniques in areas like signal and image processing, high-performance computing, parallel processing, and communications. Special attention will be paid to papers describing innovative architectures, algorithms, and software tools.