Indoor Off-Body and Body-to-Body Communication: UWB and mmW Technologies

This chapter discusses various aspects of modeling and characterization of off-body and body-to-body propagation channels for UWB and mmWave frequency range. The presence of the human subject has significant influence on the radio propagation channel, which makes in-depth study in body-centric communication channel modelling and characterization imperative. Theoretical, numerical, simulation-based, and experimental investigations have been reported to understand the channel behavior in the presence of the human subject in different environments. Different locations of the wearable antenna have been taken into considerations and studies regarding pseudo-dynamic movements have also been reported to have an idea of the channel characteristics in realistic scenarios. Statistical analysis and computation of the channel parameters such as path loss and rms delay spread which corresponds to large-scale and small-scale fading is presented in this chapter and discussed at length. Spatial, angular and application specific channel analysis have been reported in various indoor environments, to study the propagation phenomenon taking place for different types of body centric links. Measurements and theoretical work related to channel parameter variation over distance and in proximity of the user is also presented in this chapter.

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