Real-Time and Secure Wireless Health Monitoring

Figure 5

(a) Raw measured ECG signal, (b) ECG signal 𝑑(𝑛) after the differentiator, (c) ECG signal 𝑓(𝑛) after lowpass filtering. The detected R peaks are overlaid on the plot, and (d) impulse response of the lowpass filter, 𝑔₂(𝑛).

(a)

(b)

(c)

(d)