Wireless Signal Modulation Classification Open access Peer reviewed

LM-GDMAF: A Lightweight Mamba Multimodal Fusion Algorithm for Small-Sample Modulation Recognition

Zhaoguang Zhang, Zhenhua Wei, Siming Han, Yuxin Yang and 4 more

Algorithms | Jul 1, 2026

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LM-GDMAF is proposed, which integrates lightweight Mamba modules with a GDMAF fusion module, which efficiently extract temporal features, while GDMAF deeply fuses dual-modality information from IQ time series and frequency-domain spectrograms.

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Automatic modulation recognition (AMR) is a key technique in modern communications. We propose LM-GDMAF, which integrates lightweight Mamba modules with a GDMAF fusion module. The lightweight Mamba modules efficiently extract temporal features, while GDMAF deeply fuses dual-modality information from IQ time series and frequency-domain spectrograms. On a public dataset, the proposed method improves average recognition accuracy by at least 4.25% compared to baseline methods. The number of computational parameters of the lightweight Mamba module is reduced by approximately 26.1% compared to the standard Mamba model. The complete model achieves average modulation recognition accuracy gains of approximately 11.89% and 14.74% over the respective single-branch models.

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Authors

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Zhaoguang Zhang

first | PLA Rocket Force University of Engineering

Zhenhua Wei

middle | PLA Rocket Force University of Engineering

Siming Han

middle | PLA Rocket Force University of Engineering | ORCID 0009-0002-3887-3846

Yuxin Yang

middle | PLA Rocket Force University of Engineering | ORCID 0000-0002-9975-7139

Jianwei Zhan

middle | PLA Rocket Force University of Engineering

Wenpeng Wu

middle | PLA Rocket Force University of Engineering | ORCID 0009-0005-3192-2862

Haiyang You

middle | PLA Rocket Force University of Engineering

Chenxi Li

last | PLA Rocket Force University of Engineering

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BibTeX

@article{Zhang2026GDMAF,
  title = {LM-GDMAF: A Lightweight Mamba Multimodal Fusion Algorithm for Small-Sample Modulation Recognition},
  author = {Zhaoguang Zhang and Zhenhua Wei and Siming Han and Yuxin Yang and Jianwei Zhan and Wenpeng Wu and Haiyang You and Chenxi Li},
  journal = {Algorithms},
  year = {2026},
  doi = {10.3390/a19070532},
  url = {https://doi.org/10.3390/a19070532}
}

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