Motion-weighted beat aggregation plus perfusion-index-guided R correction yields wrist SpO2 MAE 2.305% at 25 Hz, comparable to 100 Hz on a private 9-subject dataset.
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Low-Rate Wrist SpO2 Estimation under Micro-Perturbations Using Motion-Aware Beat Selection and Perfusion-Guided Calibration
Motion-weighted beat aggregation plus perfusion-index-guided R correction yields wrist SpO2 MAE 2.305% at 25 Hz, comparable to 100 Hz on a private 9-subject dataset.