A Denoising and Fourier Transformation-Based Spectrograms in ECG Classification Using Convolutional Neural Network

. 2022 Dec 7;22(24):9576. doi: 10.3390/s22249576

Algorithm 2: Frequency filtration

Step 1:

x = l o a d_d a t a (s i g n a l)

Step 2:

x_{t} = f o u r i e r_t r a n s f o r m a t i o n (x)

Step 3:

\forall x_{i} \in x_{t}, {i = 0, 1, 2 \dots n} S_{f r e q} = f o u r i e r_t r a n s_f r e q . (x_{i}) x_{c l e a n} = d e l (x_{i}, S_{f r e q} > 2 H z)

Step 4:

F_{s i g} = I n v e r s e_f o u r i e r_t r a n s f o r m (x_{c l e a n})