Table 1.

Performance evaluation of benchmark signals denoising with different thresholding schemes.

	Noisy signal		Soft thresholding		Hard thresholding		Sigmoid thresholding
	SNR	RMSE	SNR	RMSE	SNR	RMSE	SNR	RMSE
Blocks	2.0000	0.9826	12.8601	0.2814	13.0078	0.2767	13.0926	0.2740
	5.0000	0.9826	14.5781	0.3262	14.7936	0.3182	14.8078	0.3177
	10.0000	0.9826	17.5151	0.4136	17.9304	0.3943	17.9304	0.3943
Bumps	2.0000	0.9826	13.6467	0.2571	13.6467	0.2571	13.6467	0.2571
	5.0000	0.9826	15.9711	0.2779	16.0294	0.2760	16.1072	0.2735
	10.0000	0.9826	19.3004	0.3368	19.6685	0.3228	20.0682	0.3083
Heavy sine	2.0000	0.9826	18.9648	0.1393	18.9648	0.1393	18.9648	0.1393
	5.0000	0.9826	21.1270	0.1535	21.1270	0.1535	21.1270	0.1535
	10.0000	0.9826	23.9296	0.1976	23.9296	0.1976	23.9480	0.1972
Doppler	2.0000	0.9826	12.4548	0.2949	13.0133	0.2765	13.4134	0.2641
	5.0000	0.9826	14.0443	0.3469	14.7786	0.3187	14.8974	0.3144
	10.0000	0.9826	17.7133	0.4043	19.3587	0.3345	19.6503	0.3235