人体通信信号传输方式与特性研究

发布时间：2018-03-19 04:07

本文选题：人体通信　切入点：多层结构组织模型　出处：《浙江大学》2012年硕士论文　论文类型：学位论文

【摘要】：便携式消费电子产品和医疗卫生保健市场的迅速发展,推动着新兴信息技术的变革。人体通信技术以人体作为数据传输通道,为便携式电子设备建立起无线网络,降低了监测系统的复杂度,具有新的历史意义以及广阔的应用前景。本文首先回顾了人体通信技术在国内外的研究现状,对比了人体通信中信号的三种耦合方式,详细分析了人体通信研究使用的组织结构模型和通信信道模型。在此基础上,本文建立了更为贴近实际的多层组织结构人体通信系统模型,从电磁场与人体相互作用的角度探讨了人体通信的信号传输机制和特性。通过仿真实验,本文分析了人体通信信道在不同方向上的信号衰减率,获取了人体通信的最佳通信频段,并对人体通信的其他影响因素,如收发器与人体表面的间距、电极尺寸、电极间距等进行了分析,为人体通信技术的进一步发展提供指导依据。仿真结果表明,在人体通信中,电磁波信号在人体表面的传播具有表面波的特征,沿人体表面,场强衰减缓慢,远离人体表面,场强衰减迅速；电场在平行和垂直于人体表面的方向上具有不同的衰减常数,垂直于人体表面的场强分量强于平行分量；在0～1000MHz的频率范围内,500～600MHz是最佳的人体通信频段；在收发器与人体表面相隔一定距离的情况下,同样可以实现良好的通信,信号传输主要集中在人体表面5mm的距离范围内；设计的收发器应适于接收垂直于人体表面的电场分量,考虑到随收发器和人体表面之间距离的增加,信号损耗增大,需考虑改进收发器结构以提高信号接收效率。
[Abstract]:The rapid development of portable consumer electronics and health care market has promoted the revolution of new information technology. The human body communication technology takes the human body as the data transmission channel and establishes the wireless network for portable electronic devices. It reduces the complexity of the monitoring system and has new historical significance and broad application prospects. This paper first reviews the research status of human body communication technology at home and abroad, compares three kinds of signal coupling methods in human body communication, and analyzes in detail the organization structure model and communication channel model used in human body communication research. In this paper, a model of human body communication system with multi-layer tissue structure is established, and the signal transmission mechanism and characteristics of human body communication are discussed from the point of view of the interaction between electromagnetic field and human body. In this paper, the signal attenuation rate of human body communication channel in different directions is analyzed, and the optimum communication frequency band is obtained, and other factors affecting human body communication, such as the distance between transceiver and human body surface, electrode size, are obtained. The electrode spacing is analyzed to provide guidance for the further development of human communication technology. The simulation results show that the electromagnetic wave signal propagates on the human body surface with the character of surface wave in the human body communication. Along the human body surface, the field intensity attenuates slowly, far away from the human body surface, and the field intensity attenuates rapidly. The electric field has different attenuation constants in the direction of parallel and perpendicular to the human body surface, the field intensity component perpendicular to the human body surface is stronger than the parallel component, and 500 ~ 600MHz is the best human communication frequency band in the frequency range of 0 ~ 1000MHz. In the case of a certain distance between the transceiver and the human body surface, good communication can also be achieved, and the signal transmission is mainly concentrated in the range of 5 mm from the human body surface, and the designed transceiver should be suitable for receiving electric field components perpendicular to the human body surface, Considering that the signal loss increases with the increase of the distance between the transceiver and the human body, it is necessary to improve the transceiver structure to improve the signal reception efficiency.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：R318.6;TN911

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