Finite integration technique for modelling of WBAN communication links in complex environments

Recently, finite integration technique (FIT) is shown to be promising method for modelling channel characteristics of wireless body area network (WBAN) on-off body communication links. One of the main advantages of FIT-based channel modelling is that channel characteristics for a specific environment can be obtained simply by drawing the environment on the software and selecting proper parameters for simulations. FIT-simulators face the same problem as the other corresponding simulators: large memory and computational capacity is required in complex environments. However, these requirements can be reduced significantly especially by using FIT with a careful planning of meshing for the simulation model and by proper selection for the critical parameters. The first aim of this paper is to depict and visualize how FIT-simulations should be conducted in complex scenarios taken into account the meshing, accuracy of simulation results, complexity, and simulation time. Further, this paper shows how density of meshing influences remarkably on the simulated channel characteristics in time domain, whereas in frequency domain sparser mesh is sufficient to obtain realistic results. Finally, the aim is to verify that FIT is valid in complex environments by comparing the Ultra Wideband (UWB) channel characteristics obtained by FIT-simulations and channel measurements.