Near-binary multisine design with arbitrary sparse spectrum for fast BIS measurement
- Author(s): Fu Zhang 1 ; Zhaosheng Teng 1 ; Yuxiang Yang 2 ; Jianmin Li 3 ; Haowen Zhong 4 ; Jiangyan Sang 4
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View affiliations
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Affiliations:
1:
Department of Electronic Science and Technology , Hunan University , 410082 Changsha , People's Republic of China ;
2: Department of Precision Instrumentation Engineering , Xi'an University of Technology , 710048 Xi'an , People's Republic of China ;
3: Department of Control Science and Engineering , Hunan University , 410082 Changsha , People's Republic of China ;
4: Department of Electric Engineering , Hunan University , 410082 Changsha , People's Republic of China
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Affiliations:
1:
Department of Electronic Science and Technology , Hunan University , 410082 Changsha , People's Republic of China ;
- Source:
Volume 12, Issue 4,
July
2018,
p.
448 – 455
DOI: 10.1049/iet-smt.2017.0239 , Print ISSN 1751-8822, Online ISSN 1751-8830
Bioimpedance spectroscopy (BIS) measurement is widely used in various biological medical applications. Broadband excitation signals with sparse spectra can be beneficial to increasing the signal-to-noise ratio (SNR) and decreasing the time of BIS measurements. This study introduces a rapid synthesis method to generate near-binary multisines (NBMs) with arbitrary sparse spectra that have the advantage of lower crest factor and less aliasing compared with the traditional multisines or binary signals. One of the NBM examples, abbreviated as Quasi-Log-Flat-19, which contains 19 quasi-logarithmical and flat desired components from 1 kHz to 1 MHz is used as the voltage source or the current source for BIS measurements (only 1 ms required). The results show that the impedance SNR by using Quasi-Log-Flat-19 (68.9 dB in average from the voltage source and 63.5 dB in average from the current source) is always higher in comparison of the corresponding optimised multisine with the same desired spectrum (65.1 dB in average from the voltage source and 58.5 dB in average from the current source). It can be concluded that NBMs can be used as good alternatives to traditional optimised multisines with sparse spectrum distribution in fast BIS measurement.
Inspec keywords: constant current sources; medical signal processing; biomedical measurement; electric impedance measurement
Other keywords: frequency 1 kHz to 1 MHz; sparse spectrum distribution; noise figure 63.5 dB; broadband excitation signal; fast BIS measurement; signal-to-noise ratio; time 1 ms; current source; NBM design; noise figure 58.5 dB; noise figure 65.1 dB; biological medical application; near-binary multisines generation; crest factor; bioimpedance spectroscopy measurement; SNR; arbitrary sparse spectra; quasilog-flat-19; noise figure 68.9 dB; voltage source; arbitrary sparse spectrum
Subjects: Measurement of basic electric and magnetic variables; Biomedical engineering; Signal processing and detection; Power electronics, supply and supervisory circuits; Digital signal processing; Biology and medical computing; Biomedical measurement and imaging; Impedance and admittance measurement
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