TABLE I. SNR_IMP Values Obtained by IRM on SimEMG, MIT-BIH-EMG and Synth Databases.

	SNRIN [dB]	Num	SNRIMP [dB]	SNRIMP 1 [dB]	SNRIMP 2 [dB]	SNRIMP 3 [dB]
SimEMG	<4	33	10.31	6.61	9.29	10.31
	4-8	19	10	7.83	9.84	10.06
	8-12	23	7	6.61	7	6.93
	12-16	28	5.17	5.24	5.17	4.95
	16-20	6	3.36	3.63	3.36	3.12
	>20	1	1.32	1.85	1.32	1.02
	total	110	7.8	6.27	7.46	7.72
MIT-BIH-EMG	<4	0	-	-	-	-
	4-8	15	7.56	4.82	7.37	8.3
	8-12	84	8.07	5.69	8.07	8.11
	12-16	55	7.41	6.7	7.41	6.86
	16-20	15	4.86	5.45	4.73	3.89
	>20	2	1.83	1.83	-0.73	-2.02
	total	171	7.46	5.87	7.4	7.23
Synth	<4	31	7.38	4.65	6.32	7.38
	4-8	89	8.81	5.19	8.25	9.96
	8-12	24	8.93	5.58	8.93	10.25
	12-16	4	9.56	5.64	9.56	10.24
	16-20	2	8.15	8.15	11.23	11.54
	>20	0	0	-	-	-
	total	150	8.54	5.19	8.04	9.5

SNR_IN - SNR of input signals; Num - number of recordings in specific SNR_IN range; SNR_IMP - SNR improvement at the end of the IRM algorithm; SNR_IMP 1-3 - SNR_IMP after 1st, 2nd and 3^rd iteration, respectively. Gray values represent the optimum number of iterations for specific SNR_IN range.