ArticleScientific reports2019
Quadrature Frequency-Group Radar and its center estimation algorithms for small Vibrational Displacement.
Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Through the wall human heart beat detection using single channel CW radar.Frontiers in physiology · 2024Article
- A Review on Recent Advancements of Biomedical Radar for Clinical Applications.IEEE open journal of engineering in medicine and biology · 2024Article
- Frequency Comb-Based Ground-Penetrating Bioradar: System Implementation and Signal Processing.Sensors (Basel, Switzerland) · 2023Article
- Methodology for the determination of human respiration rate by using Doppler radar and Empirical Modal Decomposition.Scientific reports · 2022Article
- Detrending Technique for Denoising in CW Radar.Sensors (Basel, Switzerland) · 2021Article
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Authors and funding
2 authors.
Funding
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Abstract
The quadrature continuous-wave (QCW) radar has been extensively studied for small vibrational displacement detection such as non-contact sensing of human vital signals. One of the challenges of the QCW radar is the IQ-imbalance and DC-offset estimation by using curve fitting algorithms. Many algorithms have been proposed and have shown that the fitting error increases when the displacement length is small, in which case sufficient data is not provided to the algorithms. This paper presents a quadrature frequency-group (QFG) radar which utilizes a group of frequencies to enhance the fitting performance even with the small displacement. The grouped-frequencies in the QFG radar gives more data than the single-tone of the QCW radar under the same displacement condition. This paper presents the framework and properties of the QFG radar. Some fitting algorithms for the QFG radar are presented and the most adequate algorithm is suggested by simulation and experiments. Simulation and experimental results shows that the QFG radar outperforms the QCW radar. Specifically, it is shown that the fitting accuracy of the QFG radar is up to 100 times better than the QCW radar in the experiment.
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Registered trials
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