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

doi:10.1109/LWC.2025.3562574

	OFDM-Based NOMA-Enhanced Coexistence of SemCom and BitCom System
	Yu, Hanxiao 1,2,3; Shi, Ningzhe 1,2,3; Shi, Jinglin 1,2,3; Guo, Jing 4; Wang, Siqiang 4; Fei, Zesong 4
	2025-07-01
发表期刊	IEEE WIRELESS COMMUNICATIONS LETTERS
ISSN	2162-2337
卷号	14 期号:7 页码:2069-2073
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.
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)
DOI	10.1109/LWC.2025.3562574
收录类别	SCI
语种	英语
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
WOS类目	Computer Science, Information Systems ; Engineering, Electrical & Electronic ; Telecommunications
WOS记录号	WOS:001527213500005
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/42061
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.