Nolan Wilson
Nolan Wilson has 1 paper in the ChatPPG research atlas (2026) and 3 co-authors in the atlas. Main topics: ecg, tokenization, ssl, masked-reconstruction, contrastive, morphology.
Papers
- Beat-Synchronous Tokenization for ECG Transformers2026 · IEEE MLSP 2026
University of Minnesota group asks a narrow, well-controlled question: does tokenizing an ECG waveform at cardiac-cycle (beat) boundaries instead of fixed time patches change Transformer performance, holding everything else (encoder architecture, SSL objective, evaluation protocol) constant? They compare fixed patches against three beat-synchronous tokenizer designs — resampled beats, adaptive-pooled beats, and resampled beats plus explicit R-R interval timing — on two settings: 12-lead diagnostic classification (PTB-XL after MIMIC-IV-ECG masked pretraining) and single-lead rhythm classification (Icentia11k after patient-level contrastive pretraining). No wrist signal, no PPG, no accelerometer — this is a pure ECG tokenization ablation.
- Venue: IEEE MLSP 2026 (accepted)
- Signals: ecg
- License: arXiv perpetual non-exclusive license