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

Claim 10:
11. An apparatus, comprising:
a memory; and
a processor operatively coupled to the memory, the processor configured to:
receive 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;
receive reference information indicative of a reference signal, the reference signal being a second photoplethysmographic signal including a reference noise component correlated with the source noise component;
adaptively filter, via a fixed lag Kalman smoother having an order of an even number, the reference signal to generate an estimate of the source noise component; and
calculate an output signal associated with the source signal component based on the sensed signal and the estimate of the source noise component by subtracting the estimate of the source noise component from the sensed signal.