A Segmental Approach with SWT Technique for Denoising the EOG Signal

Table 2

RMSE values obtained between reference EOG signal and denoised EOG signals by increasing segments approach using RLS adaptive filtering technique.

S. number	Segment of the signal (samples)	EOG5 dB; SNR = 39.04 dB	EOG10 dB; SNR = 33.92 dB	EOG15 dB; SNR = 29.02 dB	EOG20 dB; SNR = 24.12 dB	EOG25 dB; SNR = 19.01 dB
		RMSE (µV)	RMSE (µV)	RMSE (µV)	RMSE (µV)	RMSE (µV)
1	1:512	36.12	35.92	36.42	36.49	36.20
2	1:1024	25.54	25.40	25.76	25.84	25.71
3	1:1536	20.85	20.75	21.05	21.13	21.12
4	1:2048	18.06	17.97	18.24	18.33	18.38
5	1:2560	22.00	21.93	22.16	22.18	22.15
6	1:3072	22.09	20.03	20.23	20.26	20.28
7	1:3584	22.05	21.99	22.12	22.19	22.11
8	1:4096	20.63	20.57	20.69	20.77	20.72
9	1:4608	22.30	22.32	22.40	22.57	22.51
10	1:5120	21.63	21.65	21.74	21.88	21.86
11	1:5632	23.80	23.81	23.94	24.11	23.98
12	1:6144	26.69	26.69	26.83	27.04	26.87
13	1:6656	28.13	28.15	28.22	28.50	28.31
14	1:7168	30.08	30.13	30.21	30.44	30.32
15	1:7680	29.06	29.10	29.19	29.41	29.31
16	1:8192	28.87	28.91	28.98	29.16	29.10
Maximum value		36.12	35.92	36.42	36.49	36.20
Minimum value		18.06	17.97	18.24	18.33	18.38
Mean (µV)		24.87	24.71	24.89	25.02	24.93
Standard deviation (µV)		4.65	4.76	4.78	4.81	4.74