Quantitative analysis of measurements on human body channel for body area network

Human Body Communication (HBC) is an emerging communication technique for healthcare system in recent years. There were amount of researches about the human channel in literature in which the signal was generated, input into the human body through the transmit electrode, received in the receive one and evaluated in the network analyzer or oscilloscope. The frequency domain responses were obtained from these experiments and were used to evaluate the channel and choose the best frequency range for our application. However, to obtain the delay of channel, we must consider the time domain response of channel. The previous paper calculated the average power delay profile by the inverse Fourier transform from the frequency domain data, collected from only six test people (three males and three females). The time delay of the strongest echo was 12.208 nanoseconds. These initial analyses are not complete and not adequate to estimate the channel especially for designing one high speed HBC system. Hence, we must measure the human channels of amount of people after that propose the detail quantitative estimation of the spread delay. This paper performs measurements and investigates the characteristics of the body channel.