Near-binary multisine design with arbitrary sparse spectrum for fast BIS measurement
Near-binary multisine design with arbitrary sparse spectrum for fast BIS measurement
复制标题
具有任意稀疏频谱的近二值多重正弦设计，可实现快速 BIS 测量
DOI：
10.1049/iet-smt.2017.0239
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发表时间：
2018
影响因子：
1.4
通讯作者：
Sang Jiangyan
中科院分区：
文献类型：
--
作者：
Zhang Fu;Teng Zhaosheng;Yang Yuxiang;Li Jianmin;Zhong Haowen;Sang Jiangyan
生物阻抗谱（BIS）测量广泛应用于各种生物医学应用中。具有稀疏频谱的宽带激励信号可以有利于提高信噪比（SNR）和减少BIS测量的时间。该研究介绍了一种快速合成方法来生成具有任意稀疏频谱的近二进制多正弦（NBM），与传统的多正弦或二进制信号相比，该方法具有更低的波峰因子和更少的混叠的优点。其中一个NBM示例，缩写为Quasi‐Log‐Flat‐19，包含19个从1 kHz到1 MHz的准对数和平坦期望分量，用作BIS测量的电压源或电流源（仅需1 ms）。结果表明，使用Quasi‐Log‐Flat‐19的阻抗SNR（电压源平均为68.9 dB，电流源平均为63.5 dB）始终高于具有相同期望频谱的相应优化多正弦（电压源平均为65.1 dB，电流源平均为58.5 dB）。可以得出结论，NBMs可以作为传统的优化多谱线稀疏频谱分布的快速BIS测量的良好替代品。
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.