BangleApps

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Commit Graph

Author	SHA1	Message	Date
Erik Andresen	a152ff546c	hrmmar: bthrm compatibility - Disable when bthrm is active - Enable fft elim as default	2023-03-19 08:26:51 +01:00
Erik Andresen	77e270d356	hrmmar: Add fft elimination algorithm to remove MA The fft with size=256 is calculated over a window of 8 seconds with step size 2 seconds. Sample rate of acceleration (12.5Hz) and PPG sensor (25Hz) is unchanged, so the algorithm runs with 12.5Hz. Generally the maximum peak in fft spectrum in an interval of -5..+10BPM of last one is used. The low fft resolution limits the accuracy to ~3BPM, but mean error is ~5-10BPM. If firmware reports confidence >= 90% its value is used.	2022-11-27 19:05:40 +01:00

Author

SHA1

Message

Date

Erik Andresen

a152ff546c

hrmmar: bthrm compatibility

- Disable when bthrm is active
- Enable fft elim as default

2023-03-19 08:26:51 +01:00

Erik Andresen

77e270d356

hrmmar: Add fft elimination algorithm to remove MA

The fft with size=256 is calculated over a window of 8 seconds with step size 2
seconds. Sample rate of acceleration (12.5Hz) and PPG sensor (25Hz) is unchanged, so the algorithm runs with 12.5Hz.
Generally the maximum peak in fft spectrum in an interval of -5..+10BPM of
last one is used.

The low fft resolution limits the accuracy to ~3BPM, but mean error
is ~5-10BPM.

If firmware reports confidence >= 90% its value is used.

2022-11-27 19:05:40 +01:00

2 Commits (3fc00c62a93e3cbdf69da0d42ba8faec7217ec98)