Baseline correction and extraction of heartbeat profiles

A device, comprising:

• one or more memories;
• and
• one or more processors communicatively coupled to the one or more memories, configured to:
• determine end-of-phase information for a plurality of wavelength channels of photoplethysmography (PPG) data;
• calculate a set of baseline correction points for each wavelength channel of the plurality of wavelength channels,
• wherein a set of baseline correction points is calculated based on end-of-phase information for a wavelength channel of the plurality of wavelength channels and PPG data associated with the wavelength channel;
• perform a baseline correction for each wavelength channel of the plurality of wavelength channels,
• wherein a baseline correction is performed for the wavelength channel based on the set of baseline correction points associated with the wavelength channel and the PPG data associated with the wavelength channel;
• and
• generate a baseline corrected heartbeat profile using a principal component analysis of a result of baseline correcting each wavelength channel of the plurality of wavelength channels.

A non-transitory computer-readable medium storing instructions, the instructions comprising:

• one or more instructions that, when executed by one or more processors, cause the one or more processors to:
• determine end-of-phase information for a plurality of wavelength channels of photoplethysmography (PPG) data;
• calculate a set of baseline correction points for each wavelength channel of the plurality of wavelength channels,
• wherein a set of baseline correction points is calculated based on end-of-phase information for a wavelength channel of the plurality of wavelength channels and PPG data associated with the wavelength channel;
• perform a baseline correction for each wavelength channel of the plurality of wavelength channels,
• wherein a baseline correction is performed for the wavelength channel based on the set of baseline correction points associated with the wavelength channel and the PPG data associated with the wavelength channel;
• and
• generate a baseline corrected heartbeat profile using a principal component analysis of a result of baseline correcting each wavelength channel of the plurality of wavelength channels.