Figure 9From: Real-time estimation of respiratory rate from a photoplethysmogram using an adaptive lattice notch filter Experiment data. (a) and (b) represent PPG and the reference respiratory signal from MIT MIMIC data, respectively. (d) and (e) are PPG and the reference respiratory signal measured by BIOPAC® device. (c) and (f) depict residual signals obtained by the ALRE approach from MIT MIMIC data and measured signal, respectively. The unit of vertical axis is mV.Back to article page