The core principle of mobile radio propagation modeling is that wideband and narrowband signals experience distinct statistical behaviors due to whether multipath components can be individually resolved in time bins or undergo vectorial combination within the same bin. The theoretical framework defines the Discrete Time Impulse Response via excess delay bins ($\Delta \tau$) where unresolved components summate vectorially, leading to phase-dependent amplitude fluctuations that cancel out upon spatial averaging for wideband signals but persist significantly for narrowband continuous wave probes due to path gain correlations and relative phase differences. This concept belongs to the domain of wireless communications engineering specifically concerning small-scale fading analysis, distinguishing between time-resolved impulse response characterization (wideband) and power delay profile accumulation where instantaneous fluctuations average out over local spatial areas.
The core principle of mobile radio propagation modeling is that wideband and narrowband signals experience distinct statistical behaviors due to whether multipath components can be individually resol…