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| Multi-frequency Synchronized Measurement Method of Bioimpedance Spectroscopy Based on Nuttall Self-convolution Windowed FFT Algorithm |
| Yang Yu-xiang① Zhang Fu① Qiao Yang① Zhang Wen① Wen He② Tang Qiu② |
①(School of Mechanical and Precision Instrumentation Engineering, Xi’an University of Technology, Xi’an 710048, China)
②(College of Electrical and Information Engineering, Hunan University, Changsha 410082, China) |
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Abstract Since the traditional frequency-sweeping based Bio-Impedance Spectroscopy (BIS) measurement method can not reflect accurately the true impedance of organism, the development of multi-frequency simultaneous fast measurement method of BIS has significance. A BIS Multi-Frequency Synchronized (MFS) measurement method is proposed based on MFS signal excitation and a windowed FFT algorithm. First, the synthesis of a seven-frequency synchronized signal, as well as its spectral characteristic, is introduced. Then, a Nuttall self-convolution window function with excellent performance is put forward, and the improved interpolation FFT-based harmonic analysis algorithm based on this window is built. It validates theoretically the feasibility of the proposed BIS Multi- Frequency Synchronized fast measurement method, and provides technical support for development of practical BIS fast measurement systems.
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Received: 18 March 2013
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Corresponding Authors:
Yang Yu-xiang
E-mail: yangyuxiang@xaut.edu.cn
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2014, Vol. 36 
