Semantic communication-empowered physical-layer network coding

Shuai YANG, Haoyuan PAN, Tse Tin David CHAN, Zhaorui WANG

Research output: Chapter in Book/Report/Conference proceedingChapters

2 Citations (Scopus)

Abstract

In a two-way relay channel (TWRC), physical-layer network coding (PNC) doubles the system throughput by turning superimposed signals transmitted simultaneously by different end nodes into useful network-coded information (known as PNC de-coding). Prior works indicated that the PNC decoding performance is affected by the relative phase offset between the received signals from different nodes. In particular, some "bad"relative phase offsets could lead to huge performance degradation. Previous solutions to mitigate the relative phase offset effect were limited to the conventional bit-oriented communication paradigm, aiming at delivering a given information stream as quickly and reliably as possible. In contrast, this paper puts forth the first semantic communication-empowered PNC-enabled TWRC to address the relative phase offset issue, referred to as SC-PNC. Despite the bad relative phase offsets, SC-PNC directly extracts the semantic meaning of transmitted messages rather than ensuring accurate bit stream transmission. We jointly design deep neural network (DNN)-based transceivers at the end nodes and propose a semantic PNC decoder at the relay. Taking image delivery as an example, experimental results show that the SC-PNC TWRC achieves high and stable image reconstruction quality under different channel conditions and relative phase offsets, compared with the conventional bit-oriented counterparts. Copyright © 2023 by the Institute of Electrical and Electronics Engineers, Inc.

Original languageEnglish
Title of host publicationProceedings of 2023 IEEE Wireless Communications and Networking Conference (WCNC)
Place of PublicationDanvers, MA
PublisherIEEE
ISBN (Electronic)9781665491228
DOIs
Publication statusPublished - 2023

Citation

Yang, S., Pan, H., Chan, T.-T., & Wang, Z. (2023). Semantic communication-empowered physical-layer network coding. In Proceedings of 2023 IEEE Wireless Communications and Networking Conference (WCNC). IEEE. https://doi.org/10.1109/WCNC55385.2023.10118668

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