Table 1.

A comparison of the SER (dB) from four different filtering methods. Maximum SER values of the same noise category and level are marked in bold.

Noise type	Method	EMG 1				EMG 2
		SNR = −6 dB	SNR = −2 dB	SNR = 2 dB	SNR = 6 dB	SNR = −6 dB	SNR = −2 dB	SNR = 2 dB	SNR = 6 dB
PLI	IIR Causal	3.138	4.025	4.390	4.515	2.198	3.257	3.828	4.110
	IIR Noncausal	7.062	10.27	12.75	14.34	7.120	10.41	13.01	14.74
	EMD	7.305	10.50	12.70	14.18	7.569	11.28	13.45	15.81
	EEMD	9.150	11.22	13.56	15.10	8.699	11.59	14.16	16.03
WGN	IIR Causal	−4.777	−1.881	1.203	2.996	−4.633	−1.272	1.400	3.154
	IIR Noncausal	−4.036	−1.458	3.944	7.905	−4.037	−0.041	3.950	7.929
	EMD	1.891	4.469	6.301	8.383	0.687	2.905	5.481	8.130
	EEMD	3.155	5.785	8.707	11.30	1.476	3.670	6.121	9.475
BW	IIR Causal	3.186	4.087	4.696	4.955	3.132	4.008	4.415	4.590
	IIR Noncausal	8.506	12.37	16.05	19.38	8.624	12.59	16.39	20.19
	EMD	9.382	12.95	15.62	18.66	9.316	12.75	16.40	20.04
	EEMD	10.67	13.88	16.22	18.36	9.355	12.43	15.34	17.75