Variation of impedance in transmission channel of human body communication
Variation of impedance in transmission channel of human body communication
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DOI：
10.1109/ismict.2017.7891765
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发表时间：
2017-02
期刊：
影响因子：
--
通讯作者：
N. Arai;K. Sasaki;D. Muramatsu;Y. Nishida
中科院分区：
文献类型：
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作者：
N. Arai;K. Sasaki;D. Muramatsu;Y. Nishida
人体通信（HBC）是一种以人体为传输介质的无线通信方式。它使用电极代替天线在人体周围产生电场。这个电场在发射器、接收器、人体和周围环境之间形成电容耦合。研究了从用户手腕上的发射器到用户触摸的离体接收器的传输。佩戴发射器的人体被建模为连接到接收器输入的信号源。等效输出阻抗由人体阻抗和受周围环境和发射机布置影响的电容耦合的电容组成。通过调整接收机的输入电阻并插入电感，使接收到的信号功率最大化，从而估计出等效输出阻抗。使用三种类型的发射器电极和两种类型的接收器支架（木制和钢制）来评估对等效输出阻抗的影响。
Human body communication (HBC) is a wireless communication method that uses human body as part of the transmission medium. It uses electrodes instead of antennas to generate electric field around the human body. This electric field forms capacitive couplings between transmitter, receiver, human body, and surrounding environment. Transmission from a transmitter on user's wrist to an off-body receiver touched by the user was investigated. The human body wearing a transmitter was modeled as a signal source connected to the receiver input. The equivalent output impedance is composed of impedance of the human body and the capacitance of the capacitive coupling that is affected by the surrounding environment and the transmitter arrangement. Equivalent output impedance was estimated by maximizing the received signal power by adjusting input resistance of the receiver and by inserting inductance. Three types of transmitter electrodes and two types of receiver stands (wood and steel) were used to evaluate influences on the equivalent output impedance.