Analysis on frequency-dependency of conductive signal transmission channel for wearable devices

Abstract

Human body communication method technology can transmit the data signal through human body that is suitable for healthcare and mobile devices. This technology uses the human body channel and therefore is greatly influenced by human body characteristics. Impulse response measurements were performed on 120 adult males to analyze channel characteristics of human body. The average signal loss was −67 to −65 dB depending on the transmission direction. In addition, the correlation between human body channel characteristics and body weight, skeletal muscle mass, body fat mass, total body water and transmission and reception direction signal loss were obtained. Through analysis of channel characteristics of human body medium, channel characteristics suitable for human body communication device are presented.