Development of a Stair-Step Multifrequency Synchronized Excitation Signal for Fast Bioimpedance Spectroscopy

Table 4

Results of impedance measurement experiment under the excitation of the MFS signal 𝑓(4, 𝑡).

Harmonics 𝐇𝐤	Frequency (kHz)	Standard 𝐙st	Measured 𝐙𝐡	Relative errors |𝐄𝐙| (%)	Standard 𝜽st	Measured 𝜽𝐡	Absolute errors |𝐄𝐏| (°)
𝑓0	16	374.39	374.32	0.02	−11.48	−10.91	0.57
2𝑓0	32	326.91	326.23	0.21	−17.53	−17.54	0.01
4𝑓0	64	263.19	261.58	0.61	−18.73	−18.58	0.15
8𝑓0	128	222.37	222.16	0.09	−13.50	−13.56	0.06
Mean error				0.23			0.20