ALIGN_PPG_ECG_BEATS - aligns PPG and ECG beats.

ALIGN_PPG_ECG_BEATS aligns beats detected in an electrocardiogram (ECG) signal with those detected in a simultaneous photoplethysmogram (PPG) signal.

Inputs

• ppg_beats_inds - indices of PPG beats

• ecg_beats_inds - indices of ECG beats

• ppg_fs - sampling frequency of PPG in Hz

• ecg_fs - sampling frequency of ECG in Hz

• options - (optional) A structure containing the settings for the analysis:

  • options.max_lag - max permissible lag between ECG and PPG in secs
  • options.lag_int - increment between tested lags
  • options.tol_window - acceptable tolerance between ECG and PPG beats
  • options.do_wins - whether or not to use windowing to find the time lag
  • ecg_exc_log - (optional) A logical indicating whether or not each ECG sample will be excluded from the analysis

Outputs

• ecg_beats_a_inds : the aligned indices of ECG beats

• ecg_exc_a_log : the aligned ECG exclusion logical

• lag_ecg_samps : the number of samples by which the ECG is in front / behind the PPG

Documentation

https://ppg-beats.readthedocs.io/

Author

Peter H. Charlton, University of Cambridge, February 2022.

Version

1.0

License - GPL-3.0

   Copyright (c) 2022 Peter H. Charlton
   This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
   This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
   You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.