Characterization and Modeling of Dynamic On-Body Propagation at 4.5 GHz

On-body communication channels are of increasing interest as more and more wireless devices are wearable in medical, military, and personal communications. This letter presents an experimental investigation into the dynamic on-body channel with body movements. Based on statistical analyses of level crossing rate and fading duration, a three-state Fritchman model that considers both channel dwelling time and channel quality is proposed to describe the burst characteristics of on-body fading. The dynamic on-body channels are classified into unstable error-free state, constant error-free state, and error state. Parameters for the Fritchman model are estimated from the measured data.