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

Claim 0:
1. 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, the reference signal to generate an estimate of the source noise component;
calculate an output signal associated with the source signal component based on the sensed signal and the estimate of the source noise component, the output signal including photoplethysmographic information;
and
tune one or more aspects of the fixed lag Kalman smoother based on the output signal by modifying an even number order N of the fixed lag Kalman smoother.