Patent ID: 11922915
Assignee: EMPATICA SRL
Field: Medical technology (Instruments)
Classification: CPC G  A  H | IPC A  G  H

Claim 15:
16. A method, comprising:
receiving, from a first sensor and at a processor, sensed information indicative of a sensed signal, the sensed signal being a first photoplethysmographic signal and including a source signal component and a source noise component;
receiving, from a second sensor and at the processor, reference information indicative of a reference signal, the reference signal being a second photoplethysmographic signal and including a reference noise component correlated with the source noise component;
adaptively filtering, at the processor, the reference signal to generate an estimate of the source noise component using an adaptive filter configured as a fixed lag Kalman smoother;
calculating, at the processor, an output signal associated with the source signal component based on the sensed signal and the estimate of the source noise component; and
tuning, at the processor, one or more aspects of the fixed lag Kalman smoother based on the output signal.