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AWR1642BOOST: AWR1642BOOST

Part Number: AWR1642BOOST

Hi,

Want clarification on following shared   code block , Where heart rate in range 1.6Hz to 4Hz is estimated using FFT spectral estimation method .

if the peak detected in range 1.6Hz to 4Hz  is less than 2Hz instead of selecting the peak with maximum confidence vale ,the peak closed to the estimated value is getting selected for final Heart rate .What is the logic behind this to do this Kindly explain.

Also in UI code for heart rate decision this heart rate in range 1.6Hz to 4Hz i.e heart rate in BPM 96 to 240 BPM is input to the median filter in UI code when the confidence value is above Threshold.Kindly explain the logic for this  in signal processing.

  • Hi,

    We have to check with algorithm developer and will get back to you later this week

    thank you
    Cesar

  • Sorry for the delay.

    Here is some information I have received from developper:

    "The peak within the range [1.6 – 4.0] Hz is used for detecting the heart-rate based on the  2nd harmonic (if present) of the Heart-beat frequency. The demo is configured for heart-rate measurements from [0.8 – 2.0] Hz hence the 2nd harmonic of the heart-beat will appear in the band [1.6 – 4.0 Hz] . Note that the two bands i.e. [0.8 – 2.0] Hz and [1.6 – 4.0] Hz have an overlap between 1.6 – 2.0 Hz and hence some heuristics are needed to decide if a peak within 1.6 Hz – 2.0 Hz is the fundamental frequency or the harmonic."

    Thank you

    Cesar