Application of Improved Phase Lock Method in Weak Signal Extraction

Table 3

Analysis results of signals and .

Test batch	SNR	Sine function	Theoretical value			Test value
			Amplitude	Frequency	Phase	Amplitude	Phase
Test 1	−35	Sine function 1	0.01	20 Hz	0.6	0.008	0.65 pi
		Sine function 2	0.02	40 Hz	0.8	0.02	0.8 pi
		Sine function 3	0.03	60 Hz	0.6	0.03	0.6 pi
Test 1	−45–55	Sine function 1	0.01	20 Hz	0.6	0.018	0.56 pi
		Sine function 2	0.02	40 Hz	0.8	0.024	0.76 pi
		Sine function 3	0.03	60 Hz	0.6	0.032	0.57 pi
Test 1		Sine function 1	0.01	20 Hz	0.6	0.03	0.4 pi
		Sine function 2	0.02	40 Hz	0.8	0.052	0.5 pi
		Sine function 3	0.03	60 Hz	0.6	0.02	0.4 pi
Test 4	−35	Triangular wave	0.022	20 Hz		0.011	0.5 pi
			0.002	60 Hz		0.00009	0.5 pi