Important Bits Prefix M-Ary Quadrature Amplitude Modulation for Semantic Communications

IEEE Wireless Communications Letters 2026

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Authors: Haonan Lu, Rui Meng, Xiaodong Xu, Ying Liu, Ping Zhang, Dusit Niyato
DOI: 10.1109/lwc.2026.3693913
Cited by: 1
References: 22

Abstract

M-ary Quadrature Amplitude Modulation (MQAM) is a commonly used channel modulation technology in wireless communication systems. To achieve dedicated channel modulation for semantic communication (SemCom), we propose an Important Bits Prefix MQAM (IBP-MQAM) scheme and derive its approximate expression of important symbol error rate (ISER) and unimportant symbol error rate (USER). By extracting and quantifying text semantics using Dynamic Proximal Policy Optimization (DPPO) and Latent Dirichlet Allocation (LDA), we verify that IBP-MQAM achieves improved performance over MQAM in SemCom scenarios and further analyze the effects of key system parameters.

Fields of Study & Subjects

Wireless Signal Modulation Classification Advanced Wireless Communication Techniques Advanced Wireless Communication Technologies

Publication details

Journal / source
IEEE Wireless Communications Letters
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Volume
15
Pages
3209–3213
Publication date
1 January 2026
Language
EN