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OFDM-Based NOMA-Enhanced Coexistence of SemCom and BitCom System

文献类型：期刊论文

作者Yu, Hanxiao1,2,3; Shi, Ningzhe1,2,3; Shi, Jinglin1,2,3; Guo, Jing4; Wang, Siqiang4; Fei, Zesong4
刊名IEEE WIRELESS COMMUNICATIONS LETTERS
出版日期2025-07-01
卷号14期号:7页码:2069-2073
关键词Antennas Semantics Fluids Resource management NOMA Optimization Heuristic algorithms Fading channels Uplink Spectral efficiency Semantic communication non-orthogonal multiple access (NOMA) fluid antenna deep reinforcement learning (DRL)
ISSN号2162-2337
DOI10.1109/LWC.2025.3562574
英文摘要To facilitate the popularization and application of semantic communication, it is crucial to ensure its efficient coexistence with traditional digital communication networks. In this letter, we investigate a non-orthogonal multiple access (NOMA)-enabled heterogeneous semantic communication (SemCom) and bit communication (BitCom) coexistence system under an orthogonal frequency division multiplexing (OFDM) framework. The deployment of fluid antennas at the user side is treated as a crucial strategy to enhance system efficiency and mitigate interference. Within the above OFDM framework, we construct a frequency domain channel with multicarriers, based on the multipath channel characteristics exhibited by different fluid antenna ports. Subsequently, a sum semantic rate maximization problem is formulated by optimizing the subcarrier allocation, power allocation, and the fluid antenna port selection of the users. Note that the derived problem is challenging to solve through conventional methods due to the presence of highly coupled continuous and discrete variables. To address this challenge, we propose a dual proximal policy optimization (DPPO) algorithm as a solution for this problem, which divides the problem into two parts and leverages separate subnetworks to solve each part. Simulation results demonstrate the efficiency of the proposed algorithms in enhancing the sum semantic rate.
资助项目National Natural Science Foundation of China[62201052] ; Natural Science Foundation on Frontier Leading Technology Basic Research Project of Jiangsu[BK20212001]
WOS研究方向Computer Science ; Engineering ; Telecommunications
语种英语
WOS记录号WOS:001527213500005
出版者IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
源URL[http://119.78.100.204/handle/2XEOYT63/42060]  
专题中国科学院计算技术研究所期刊论文_英文
通讯作者Guo, Jing
作者单位1.Chinese Acad Sci, Inst Comp Technol, State Key Lab Processors, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Beijing Key Lab Mobile Comp & Pervas Device, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Sch Comp Sci & Technol, Beijing 100049, Peoples R China
4.Beijing Inst Technol, Sch Informat & Elect, Beijing 100081, Peoples R China
推荐引用方式
GB/T 7714		 Yu, Hanxiao,Shi, Ningzhe,Shi, Jinglin,et al. OFDM-Based NOMA-Enhanced Coexistence of SemCom and BitCom System[J]. IEEE WIRELESS COMMUNICATIONS LETTERS,2025,14(7):2069-2073.
APA Yu, Hanxiao,Shi, Ningzhe,Shi, Jinglin,Guo, Jing,Wang, Siqiang,&Fei, Zesong.(2025).OFDM-Based NOMA-Enhanced Coexistence of SemCom and BitCom System.IEEE WIRELESS COMMUNICATIONS LETTERS,14(7),2069-2073.
MLA Yu, Hanxiao,et al."OFDM-Based NOMA-Enhanced Coexistence of SemCom and BitCom System".IEEE WIRELESS COMMUNICATIONS LETTERS 14.7(2025):2069-2073.

入库方式： OAI收割

来源：计算技术研究所

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