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Article type: Other
Authors: Zhang, Shuanga; b; c; d; 1 | Qin, Yu-Pinga; b; 1 | Kuang, Jiang-Minga; b | Yin, Fu-Chenga | Liu, Yi-Hea; 1; *
Affiliations: [a] College of Computer Science, Neijiang Normal University, Neijiang, Sichuan, China | [b] Engineering and Technical College, Chengdu University of Technology, Leshan, Sichuan, China | [c] State Key Laboratory of Analog and Mixed-Signal VLSI, University of Macau, Macau, China | [d] Department of Electrical and Computer Engineering, Faculty of Science and Technology, University of Macau, Macau, China
Correspondence: [*] Corresponding author: Yi-He Liu, College of Computer Science, Neijiang Normal University, Neijiang, Sichuan, China. E-mail: [email protected].
Note: [1] Authors contributed equally.
Abstract: BACKGROUND: This experiment was designed to study the respective effects of the closed-state human palm and dynamic arm bending on intra-body communication channel attenuation. METHODS: We selected the right upper arm of a healthy adult male as the experimental object to measure channel attenuation variation in a closed or open palm, and when the arm was bent, so as to analyze channel characteristics. CONCLUSIONS: The experiment showed that, in a quasi-static stable system, the effects of a closed palm on channel attenuation were negligibly minimal. In contrast, the physiological signal of the living body significantly interfered with the channel in the low-frequency mode. In the dynamic arm-bending experiment, we found that the attenuation variation range corresponds to the intersection angle (90∘⩽θ⩽ 180∘) of the upper arm and forearm; these results provide the basis for the establishment of a theoretical model.
Keywords: Human upper limbs, dynamic pattern, channel attenuation, upper arm, forearm
DOI: 10.3233/THC-181208
Journal: Technology and Health Care, vol. 26, no. 3, pp. 553-558, 2018
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