电流耦合型人体通信准静态建模与收发器设计  

Quasi-static model and transceiver design for galvanic coupling intra-body communication

作　　者：高跃明[1,2,3] 潘少恒[2,3] 麦炳源[2,3] 韦孟宇[2,3] 杜民[1,2] 

机构地区：[1]福州大学物理与信息工程学院,福州350002 [2]福州大学福建省医疗器械和医药技术重点实验室,福州350002 [3]澳门大学科技学院电机及电脑工程系,澳门特别行政区999078

出　　处：《电子测量与仪器学报》2012年第8期732-737,共6页Journal of Electronic Measurement and Instrumentation

基　　金：国家自然科学基金(编号:51047001)资助项目;福建省自然科学基金(编号:2011J05077);福建省教育厅项目(编号:JK2010006)资助项目;澳门科学发展基金(编号:014/2007/A1;063/2009/A;024/2009/A1)资助项目

摘　　要：建立电流耦合型人体通信准静态场的电磁模型,为收发器设计提供理论指导。采用有限元方法建立包含电容效应的人体上臂模型,分析人体内部耦合电流的传输特性。以FPGA为平台设计出FSK调制器、全数字锁相环位同步电路和信号解调器,并辅以发送端低通滤波、信号保持和接收端前处理电路,构成电流耦合型人体通信收发器。模型的传输增益特性具有高通特性,在100 kHz以下与实验数据具有较好的一致性。收发器可以5 Kb/s速率实现数字基带信号的可靠通信。建模与设计工作为电流耦合型人体通信的实现提供理论与实践依据。Quasi-static electromagnetism model of galvanic coupling intra-body communication was constituted to provide the theory basis for the transreceiver design. The transmission characteristic of coupling current was studied through the FEM modeling of quasi-static approximate of human limb including the capacity effect. The FSK modulator and demodulator, all digital phase locked loop （ADPLL） bit synchronization circuit were designed based on the FPGA. Also the peripheral circuits with the functions as low pass filter, signal hold circuit of transmitter and preprocess of re- ceiver were completed. Finally, the signal gain calculated by the model with the high pass characteristic was matched well below 100 kHz with the in vivo experiments. The digital base-band signal could be transmitted through the human body reliably with the rate 5 Kb/s. The quasi-static model and the design of the transreceiver of galvanic coupling intra-body communication are significative for the prototype development in the future.

关 键 词：人体通信 电流耦合 准静态建模 电容效应 收发器 位同步 

分 类 号：TN919[电子电信—通信与信息系统]