Undersampling and Saturation for Impedance Spectroscopy Performance

Beer, Dirk Johannes De; Joubert, Trudi-Heleen

doi:10.1109/jsen.2021.3105317

Cited by 5 publications

(3 citation statements)

References 22 publications

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“…204 In deciding whether to grant/reject a licence, the Board bases decisions on the conduct of other similarly situated copyright owners or general market practices. 205 If the Board arrives at the decision to grant a licence, the next step will be to consider the terms and conditions of the licence 206 , the duration of the licence, the price (tariff) and payment. In setting the terms and conditions of a licence, the Board will take various factors into account on a case-by-case basis including, (a) the number of copies requested; (b) the level of expected profit; (c) the proposed use; and (d) the nature of the applicant.…”

Section: Canadamentioning

confidence: 99%

Copyright, and the Regulation of Orphan Works: A Comparative Review of Seven Jurisdictions and a Rights Clearance Simulation

https://www.gov.uk/government/organisations/intell

Favale

Homberg

et al. 2022

SSRN Journal

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Section: Canadamentioning

confidence: 99%

Copyright, and the Regulation of Orphan Works: A Comparative Review of Seven Jurisdictions and a Rights Clearance Simulation

https://www.gov.uk/government/organisations/intell

Favale

Homberg

et al. 2022

SSRN Journal

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“…Undersampling, which refers to the sampling technique where the sampling frequency is lower than the requirement of the Nyquist sampling theorem, is an effective method for reducing the sampling frequency [29]. When undersampling a signal, the amplitudes and relative phases between different spectral lines in the resultant spectral analysis will not change [30]. However, undersampling inevitably leads to spectral aliasing, and the true amplitude and phase of each spectral line may not be accurately identified.…”

Section: Introductionmentioning

confidence: 99%

Bioimpedance spectroscopy measurement method based on multisine excitation and integer-period undersampling

Hong

Zhang

et al. 2023

Meas. Sci. Technol.

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Bioimpedance spectroscopy (BIS) is a detection technology that uses the bioimpedance characteristics and changes law of human tissue to analyze its physiological and pathological states, and is widely used in clinical and scientific research applications. Traditional BIS measurement needs to satisfy the Nyquist sampling theorem, so as to ensure that the measurement signal has no frequency aliasing, but at the same time, the sampling frequency and the number of sampling points will be increased, which will increase the computation and hardware cost. This paper proposes a novel BIS measurement method based on multisine excitation and integer-period undersampling (IPUS) technology. Firstly, the multisine-based IPUS theory was deduced, and the BIS measurement principle based on multisine excitation and IPUS technology was introduced. Secondly, a BIS measurement system based on FPGA+ADC+DAC architecture was designed, and a multisine excitation with 32 pseudo-logarithmically distributed frequency components in the range of 2-997 kHz was generated. The comparative BIS measurement experiments on three RC three-element models were carried out under the Nyquist sampling condition (fs = 2.56 MHz) and under the IPUS condition (fs = 512 kHz), respectively. Experimental results showed that the average amplitude error of BIS measurement under the Nyquist sampling condition is 0.80% (mean) ± 1.19% (std), while the average amplitude error under the IPUS condition is 1.02% (mean) ± 1.13% (std). Moreover, the signal to nosie ratio (SNRz) is calculated in 40 repeated BIS measurements, where the mean SNRz is 63.60dB under IPUS condition, similar to the value of 62.77dB under Nyquist sampling condition. The proposed multisine-based IPUS theory and its implementation method in this paper can complete a BIS measurement with only one fundamental period, and need the sampling frequency and sampling points lower than the requirements of the Nyquist theory, which lay a theoretical and technical foundation for BIS measurement system with reduced hardware requirements and computation cost.

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“…In practice, conventional laboratory-based systems, such as inductively coupled plasma mass spectrometry (ICP-MS), pH metric determination, optical infrared spectroscopy, optical spectroscopy, and impedance spectroscopy [25][26][27][28], are employed as the gold standard to monitor changes in water quality and to detect whether contaminants are present in water. These methods involve collecting water samples from water sources and transporting them, by field officers, to far-off laboratories, where the samples are studied and analyzed.…”

Section: Introductionmentioning

confidence: 99%

A Bibliometric Analysis and Review of Resource Management in Internet of Water Things: The Use of Game Theory

Olatinwo

Joubert

2022

Water

Self Cite

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To understand the current state of research and to also reveal the challenges and opportunities for future research in the field of internet of water things for water quality monitoring, in this study, we conduct a bibliometric analysis and a comprehensive review of the published research from 2012 to 2022 on internet of water things for water quality monitoring. The bibliometric analysis method was used to analyze the collected published papers from the Scopus database. This helped to determine the majority of research topics in the internet of water things for water quality monitoring research field. Subsequently, an in depth comprehensive review of the relevant literature was conducted to provide insight into recent advances in internet of water things for water quality monitoring, and to also determine the research gaps in the field. Based on the comprehensive review of literature, we identified that reviews of the research topic of resource management in internet of water things for water quality monitoring is less common. Hence, this study aimed to fill this research gap in the field of internet of water things for water quality monitoring. To address the resource management challenges associated with the internet of water things designed for water quality monitoring applications, this paper is focused on the use of game theory methods. Game theory methods are embedded with powerful mathematical techniques that may be used to model and analyze the behaviors of various individual, or any group, of water quality sensors. Additionally, various open research issues are pointed out as future research directions.

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Undersampling and Saturation for Impedance Spectroscopy Performance

Cited by 5 publications

References 22 publications

Copyright, and the Regulation of Orphan Works: A Comparative Review of Seven Jurisdictions and a Rights Clearance Simulation

Copyright, and the Regulation of Orphan Works: A Comparative Review of Seven Jurisdictions and a Rights Clearance Simulation

Bioimpedance spectroscopy measurement method based on multisine excitation and integer-period undersampling

A Bibliometric Analysis and Review of Resource Management in Internet of Water Things: The Use of Game Theory

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