Model and channel characteristics of near field inter-body coupling communication

Near field inter-body coupling communication (NF-IBCC) is a short-distance wireless communication centered on the human body. It uses the electric field within close proximity of the human body to establish a channel, when electrodes as a radiation source keep in contact with the human body. NF-IBCC can achieve much higher data security and lower power consumption than traditional radio frequency communications, which is a potential communication technology applied to the internet of body (IoB). However, its channel model is not totally clear so far. In this letter, we propose a channel model. Then, the accuracy of the proposed model is verified. Finally, the effect of distances, postures, angles, and heights on the channel characteristics is analyzed and discussed. Our work lays a theoretical foundation for the system design of NF-IBCC and will promote its application to IoB.