Wideband body-centric channels depending on bandwidths in various environments

The authors have focused on wideband, including ultra-wideband (UWB, 3.1 to 10.6 GHz), on-body radio propagation in various environments. UWB technologies yield less susceptibility to fading due to the greater resolvability of the multipath components. Many studies have been reported about indoor propagation for UWB (typically exceeding 500-MHz bandwidth) as well as narrowband (less than 10 MHz). Bandwidths have not yet fully examined between 10 MHz and 1 GHz. To examine the unexplored channels, a series of propagation measurements campaign were carried out between on-body antennas in five different rooms. A new path loss and statistical models considering room volume had been proposed. This paper presents on-body propagation characteristics in various environments, following the bandwidths between 10MHz and 1-GHz.