Characterization of In-Body Radio Channels for Wireless Implants
Characterization of In-Body Radio Channels for Wireless Implants
复制标题
无线植入体内无线电通道的表征
DOI：
10.1109/jsen.2016.2635700
复制
发表时间：
2017-03-01
影响因子：
4.3
通讯作者：
Hao, Yang
中科院分区：
文献类型：
--
作者：
Li, Jingzhen;Nie, Zedong;Hao, Yang
以身体为中心的无线通信被认为是第四代移动通信系统的重要组成部分，为个人医疗保健中的植入式设备提供了一种有前景的通信解决方案。本文提出了一种非均匀人体模型来研究无线植入物体内无线电信道，并采用时域有限差分法进行数值模拟。具体来说，根据植入位置，分别从大脑内到胸部、腹部、上臂和大腿表面，在不同频率（5至100 MHz）下研究不同链路的通道增益和群延迟等参数。还在 45 MHz 下研究了电极尺寸和类型的影响。结果表明，所有通道在 5 MHz 时的最大增益均超过 -12 dB。群延迟几乎与通道无关。该模型通过实验测量得到验证。结果表明，模拟与测量结果非常吻合。
Body-centric wireless communication, which is accepted as an important part of the fourth generation mobile communications systems, provides a prospective communication solution for implantable devices in personal health care. In this paper, an inhomogeneous human body model was proposed to study the in-body radio channels for wireless implants, and numerical simulations were carried out with the finite-difference time-domain method. Specifically, parameters, such as channel gain and group delay, were studied for different links according to implant locations, namely, from intra-brain to the surface of chest, abdomen, upper arm, and thigh, respectively, over different frequencies (from 5 to 100 MHz). The influences of electrode size and type were also studied at 45 MHz. The results showed that all channels had the maximum gain of more than-12 dB at 5 MHz. Group delay was almost independent of channels. The model was verified by experimental measurements. The results showed that the simulations were in good agreement with the measurements.