Broadband Bioimpedance Spectroscopy Based on a Multifrequency Mixed Excitation and Nuttall Windowed FFT Algorithm

Table 1

Spectrum characteristics of the nine primary harmonics in the MFM signal 𝑓(9,𝑡).

𝐻𝑘	𝑓0	2𝑓0	4𝑓0	8𝑓0	16𝑓0	32𝑓0	64𝑓0	128𝑓0	256𝑓0
𝑏𝑘	0.3993	0.3988	0.3976	0.3953	0.3909	0.3827	0.3688	0.3482	0.3482
𝑝𝑘 (%)	7.97	7.95	7.90	7.81	7.64	7.32	6.80	6.06	6.06
𝜑𝑘	0	0	0	0	0	0	0	0	0
𝑓 (kHz)	3.90625	7.8125	15.625	31.25	62.5	125	250	500	1000