arXiv:2504.10556cs.LGcs.AI2025-04被引 4

用变分自编码器分离信号特征,实现干扰分类的高效压缩与增强。

VAE-based Feature Disentanglement for Data Augmentation and Compression in Generalized GNSS Interference Classification

  • 通过VAE提取可分离的低维信号特征,实现数据压缩与插值增强。
  • 压缩率高达512至8192倍,分类准确率达99.92%。
  • 适合边缘计算中资源受限的卫星导航干扰实时识别场景。

分布式学习与边缘AI要求高效数据处理、低延迟通信、去中心化模型训练及严格数据隐私,以在边缘设备上实现实时智能,减少对集中式基础设施的依赖并保障高模型性能。在全局导航卫星系统(GNSS)应用中,核心目标是准确监测与分类干扰,提升环境感知能力。为此,可在低资源设备部署机器学习(ML)模型,实现极低通信延迟与数据隐私保护。关键挑战在于压缩模型的同时保持高分类精度。本文提出基于变分自编码器(VAEs)的特征解耦方法,提取用于干扰分类的关键潜在特征。我们证明该解耦方法可同时用于数据压缩与数据增强,通过插值信号功率的低维潜在表示实现。为验证方法,我们在四个数据集上评估了三种VAE变体——标准、因子分解和条件生成型,包括两个受控室内环境数据集和两个真实高速公路数据集。此外,进行了大规模超参数搜索以优化性能。所提VAE实现512至8192倍的数据压缩率,并达到最高99.92%的分类准确率。

原文摘要 · Abstract (English)

Distributed learning and Edge AI necessitate efficient data processing, low-latency communication, decentralized model training, and stringent data privacy to facilitate real-time intelligence on edge devices while reducing dependency on centralized infrastructure and ensuring high model performance. In the context of global navigation satellite system (GNSS) applications, the primary objective is to accurately monitor and classify interferences that degrade system performance in distributed environments, thereby enhancing situational awareness. To achieve this, machine learning (ML) models can be deployed on low-resource devices, ensuring minimal communication latency and preserving data privacy. The key challenge is to compress ML models while maintaining high classification accuracy. In this paper, we propose variational autoencoders (VAEs) for disentanglement to extract essential latent features that enable accurate classification of interferences. We demonstrate that the disentanglement approach can be leveraged for both data compression and data augmentation by interpolating the lower-dimensional latent representations of signal power. To validate our approach, we evaluate three VAE variants - vanilla, factorized, and conditional generative - on four distinct datasets, including two collected in controlled indoor environments and two real-world highway datasets. Additionally, we conduct extensive hyperparameter searches to optimize performance. Our proposed VAE achieves a data compression rate ranging from 512 to 8,192 and achieves an accuracy up to 99.92%.

VAE特征解耦边缘计算干扰分类

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