人体通信不同信道传播特性的研究

发布时间：2018-03-27 10:23

本文选题：人体通信　切入点：时域有限差分　出处：《计算机工程与应用》2017年18期

【摘要】：植入式通信系统是人体体域网(BAN)的重要组成部分,在医疗监测、疾病诊断治疗和残疾人辅助方面有重要的应用前景。基于时域有限差分的方法(FDTD)原理建立多层非均匀介质人体组织模型,通过在体表、体内植入不同方式信道,研究植入式人体通信信道传播特性。首先,建立多层非均匀介质人体组织模型,考虑到组织介电特性与频率有关,随频率呈α、β、γ色散,需对介质Debye模型进行非线性参数拟合;然后,在人体通信链路体表-体表、体表-体内、体内-体表和体内-体内植入四种信道,分析0.3~100 MHz频段人体通信信道的衰减特性;最后,通过信道植入实验(猪肉)验证了非均匀介质建模的可行性。分析植入式人体信道路径损耗特性:在植入信道传播特性方面,信道路径损耗与信道长度相关且随频率呈高通特性,在信道植入方式方面,体内信道较体表植入更具有优势。
[Abstract]:Implantable communication system is an important part of human body area network (BANs), in medical monitoring, The diagnosis and treatment of diseases and the assistance of the disabled have important application prospects. Based on the FDTD (finite difference time Domain) method, a multilayer non-uniform medium human tissue model is established, and different channels are implanted in the body surface. The propagation characteristics of implanted human communication channel are studied. Firstly, a human body tissue model of multilayer non-uniform medium is established. Considering that the dielectric properties of the tissue are related to frequency and the dispersion is 伪, 尾, 纬 with frequency, the dielectric Debye model needs to be fitted with nonlinear parameters. Then, four channels are implanted in human body surface, body surface, body surface, body surface, body surface and body body to analyze the attenuation characteristics of the human body communication channel in the 0.33 MHz frequency band. The feasibility of non-uniform media modeling is verified by channel implantation experiment (pork). The path loss characteristics of implanted human body channel are analyzed. The channel path loss is related to the channel length and has high pass characteristics with the frequency. In the aspect of channel implantation, the internal channel has more advantages than the body surface implantation.
【作者单位】：南京理工大学自动化学院;中国科学院深圳先进技术研究院;
【基金】：国家自然科学基金(No.61403366,No.U1505251) 广东省科技计划项目(No.2015A020214018) 深圳市基础研究项目(No.JCYJ20150401150223630) 深圳市技术开发项目(No.CXZZ20150505093829778)
【分类号】：TN911

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