IEEE Journal of Biomedical and Health Informatics ECG biometric authentication using self-supervised learning for IoT edge sensors G Wang, S Shanker, A Nag, Y Lian, D John IEEE Sensors Journal A task-generic high-performance unsupervised pre-training framework for ECG G Wang, Q Wang, A Nag, D John ICTA 2020 Low complexity ecg biometric authentication for iot edge devices G Wang, D John, A Nag 2023 BioCAS Unsupervised pre-training using masked autoencoders for ecg analysis G Wang, Q Wang, GN Iyer, A Nag, D John