Golang, Dsp, Heartbeat, Fast Fourier Transform, Grafana.
see that the peak around 0.92Hz (55 bpm). The next step that we want to do is to run the signal through a bandpass filter to remove some of the noise from the low and high frequencies that we don’t care about. The code to do that is, filtered, err := signal.BandPassFilter(0.5, 1.2) We assume that