Abstract

Info

Title:: Communication performance of wearable medical equipment based on human body communication

Author(s):: CHE Kelong; LIAO Wei; ZHOU Lingli; LI Qihang; WU Qiuwen; School of Electronic and Electrical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China

Keywords:: Keywords: human body communication signal detection path loss transmission characteristic channel modeling

Abstract:: Abstract: Human body communication (HBC) is a new way of communication using human tissues as a medium. Medical equipment using HBC is advantageous over traditional wireless communication in energy consumption and radiation. The study aims to study the channel characteristics and communication performance of the HBC mode by analyzing the signal path loss characteristics in human body models of various heights, comparing the bit error rate of channels in two kinds of modulation modes, and analyzing the multipath law in impulse response model through power delay profile. The established channel model is verified by root mean square delay extension. The average value of the shadow effect in multiple models is obtained through analyzing the path loss characteristics. The shadow effect of the human body channel leads to the reduction of system performance. The comparison on the effects of FSK and PSK modulations on the bit error rate reveals that PSK modulation is more suitable for the body surface channels. The analysis on the multipath characteristics showed that the average number of channel multipaths in multiple models is about 16, and the first 4 paths occupy most of the energy. The link characteristics under electromagnetic analysis are very close to the modeling results, verifying the correctness of the model. This study provides theoretical support for the design of medical equipment receivers in the body surface link of the body area network.