MSMA-PPG
channel-aligned expert routing for selected-wavelength PPG
PPGIMU
Key facts
- Pretraining Data
- Synchronized multi-wavelength PPG + acceleration recordings (sources not named in abstract)
- Venue
- ICLR 2027 submission (under review)
Summary
Wavelength-specific projections + residual adapters on a shared optical temporal backbone; full-to-subset alignment links paired training views; Channel-Aligned MoE (availability-masked top-2 routing) over optical, motion and fused experts. Evaluated HR, BP, AF single-stream transfer. Reported (routing disabled, PPG-only, seven-model comparison): lowest participant-macro HR MAE on EarSet 5.020 bpm and PPG-DaLiA 9.246 bpm; lowest SBP MAE 15.456 mmHg and second-best AF AUPRC/AUROC 0.5177/0.8909.
Reported benchmarks
Heart rate estimation
EarSet · MAE (bpm) ↓
#1 of 1
5.020
PPG-only single selected λ; participant-macro; routing off; ICLR'27 sub
Heart rate estimation
PPG-DaLiA · MAE (bpm) ↓
#4 of 6
9.246
PPG-only — not comparable to PPG+ACC SOTA rows above; ICLR'27 sub