
Sensors, Год журнала: 2025, Номер 25(6), С. 1876 - 1876
Опубликована: Март 18, 2025
Human–computer interaction (HCI) drives innovation by bridging humans and technology, with human activity recognition (HAR) playing a key role. Traditional HAR systems require user cooperation infrastructure, raising privacy concerns. In recent years, Wi-Fi devices have leveraged channel state information (CSI) to decode movements without additional preserving privacy. However, these struggle unseen users, new environments, scalability, thereby limiting real-world applications. Recent research has also demonstrated that the impact of surroundings causes dissimilar variations in at different times day. this paper, we propose an unsupervised multi-source domain adaptation technique addresses challenges. By aligning diverse data distributions target (e.g., or atmospheric conditions), method enhances system adaptability leveraging public datasets varying samples. Experiments on three CSI using preprocessing module convert into image-like formats demonstrate significant improvements baseline methods average micro-F1 score 81% for cross-user, 76% cross-user cross-environment, 73% cross-atmospheric tasks. The approach proves effective scalable, device-free sensing realistic cross-domain scenarios.
Язык: Английский