arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2403.04036cs.LGcs.AIeess.SP
收藏

面向时域偏移下鲁棒射频设备指纹识别的无监督对比学习

Unsupervised Contrastive Learning for Robust RF Device Fingerprinting Under Time-Domain Shift

Oregon State University(俄勒冈州立大学)

Jun Chen, Weng-Keen Wong, Bechir Hamdaoui

AI总结:

针对射频设备指纹识别受时域域偏移影响准确率下降的问题,提出基于对比学习的无监督方法,通过构造同/异传输信号正负样本对学习域不变特征,在多日采集的数据集上较基线准确率提升10.8%-27.8%。

摘要:

射频(RF)设备指纹识别被认为是实现自动化无线设备识别与分类的一项潜力技术。然而,该技术面临一项关键挑战:信道条件与环境设置的变化可能引发域偏移,当测试数据与训练数据采集自不同域时,可能会降低基于射频的设备分类准确率。本文提出一种利用对比学习缓解该域偏移问题的新方案。对比学习是深度学习领域一种先进的自监督学习方法,它学习一种距离度量,使得正样本对在学习到的度量空间中比负样本对距离更近(即更相似)。将其应用于射频指纹识别时,我们的模型将来自同一次传输的射频信号视为正样本对,来自不同传输的射频信号视为负样本对。通过对数天内采集的无线及有线射频数据集开展实验,我们证明所提对比学习方法能够捕获域不变特征,削弱域特定变化带来的影响。结果显示,该方法相比基线模型在准确率上实现了大幅且稳定的提升(10.8%至27.8%),凸显了对比学习在提升域偏移场景下设备分类效果方面的有效性。

英文摘要:

Radio Frequency (RF) device fingerprinting has been recognized as a potential technology for enabling automated wireless device identification and classification. However, it faces a key challenge due to the domain shift that could arise from variations in the channel conditions and environmental settings, potentially degrading the accuracy of RF-based device classification when testing and training data is collected in different domains. This paper introduces a novel solution that leverages contrastive learning to mitigate this domain shift problem. Contrastive learning, a state-of-the-art self-supervised learning approach from deep learning, learns a distance metric such that positive pairs are closer (i.e. more similar) in the learned metric space than negative pairs. When applied to RF fingerprinting, our model treats RF signals from the same transmission as positive pairs and those from different transmissions as negative pairs. Through experiments on wireless and wired RF datasets collected over several days, we demonstrate that our contrastive learning approach captures domain-invariant features, diminishing the effects of domain-specific variations. Our results show large and consistent improvements in accuracy (10.8\% to 27.8\%) over baseline models, thus underscoring the effectiveness of contrastive learning in improving device classification under domain shift.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑