10684972d7
process_frame computed arithmetic mean + variance on phase values from atan2(), which are wrapped to (-pi, pi]. Phases close across the +/-pi discontinuity produced ~pi^2 variance instead of ~1e-6, feeding wrap noise into the heart-rate FFT buffer. Replace inline math with a standard circular variance helper (1 - mean resultant length). Add 4 unit tests, one through the production path of process_frame. Closes #593 |
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| patches/ruvector-crv | ||
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