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IWR6843AOPEVM: Calculation of vital parameters from the waveform

plefert
Prodigy 60 points
Part Number: IWR6843AOPEVM

Hello,

I wanted to ask whether it makes sense to calculate the actual HR or BR from the HR or BR waveform.

You should then arrive at the same values, right?

How does the radar module (I have an IWR6843AOPEVM) do the calculation, simply using FFT?

I would be very pleased to receive an answer. Thanks in advance!

Kind regards
Patrick

  • 0
    TI__Expert 8790 points

    Hi Patrick,

    HR or BR waveform correspond to the internal values obtained during computation. They do not indicate the HR and BR. It is not possible to arrive at the HR and BR using the waveform data.

    You need to extract the HR and BR from the Vital signs TLV sent out by the sensor

    You can refer to the Vital signs TLV at the below link

    \radar_toolbox_2_00_00_06\source\ti\examples\Medical\Vital_Signs_With_People_Tracking\docs\vital_signs_with_people_tracking_user_guide.html

    Vital signs computation algorithm is based on the computation of phase differences and then performing FFT to obtain the HR/BR spectrum

    You can refer to the openly available papers which describe vitals signs computation

    Regards