Ray-tracing based Channel Modeling for Rough-boundary Environments

Wireless ad-hoc network which has not been supported by centralized infrastructure is widely used because of its utilitarian ability. Thanks to a low-complex aspect, It is favorable for IoBT (Internet of Battlefield Things) applications. Propagation channel analysis prior to the network configuration is required to the appropriate sensor deployment. Although experimental approaches warrant an accuracy, ray-tracing simulator is employed because site measurements are highly prohibitive and labor-absorbing. The scattering mechanisms are tough to be implemented by a ray-tracing simulator, which often causes low accuracy in harsh areas, such as subterranean environments. In this paper, the surface scattering theory that considers an incident wave at a rough boundary as the radiation source is exploited to revise the existing ray-tracing simulator. The accuracy of the revised simulator is verified by the channel sounding conducted in the subterranean area which has much roughness. The measurement result indicates that a propagation channel could be well analyzed by employing the surface scattering theory for the ray-tracing based channel analysis.