A Cloud-Based Machine Learning Approach to Reduce Noise in ECG Arrhythmias for Smart Healthcare Services

Table 2

NMSE estimation values of scenario I for estimators.

No. of iterations (k)	Time delay estimation				Doppler shift estimation
	KLMS-modified NC	EKF	UKF	OIUKF	KLMS-modified NC	EKF	UKF	OIUKF
1000	1.28	0.095	0.044	0.0091	0.97	0.095	0.044	0.0082
2000	1.12	0.082	0.036	0.0067	0.68	0.072	0.026	0.0064
3000	0.98	0.055	0.022	0.0054	0.51	0.064	0.022	0.0042
4000	0.67	0.045	0.015	0.0046	0.43	0.051	0.015	0.0026
5000	0.42	0.029	0.012	0.0032	0.36	0.045	0.0092	0.00094