Small-scale fading modeling for tactical ad hoc networks

Small-scale fading describes the rapid fluctuations of the channel envelop due to multipath (interferences between different components of the transmitted signal) and Doppler spectrum. The modeling of these effects is not easy especially in context of mobile wireless ad hoc networks (MWAN). The nodes' mobility in an MWAN induces random and rapid variation of network topology. Consequently, small-scale fading modeling becomes more complex. We elaborated a channel simulator using Tap Delay Lines (TDL) method and based on ITU-RM.1225 model. ITU standard model is used in addition with Doppler spectrum formulation particularly for mobile-to-mobile (M2M) channel. Some simulation results with the corresponding channel statistics (CDF, LCR and ADF) are presented. This simulator is a part of a global approach which linked tactical scenarios specification and channel modeling (large-scale and small-scale propagation). The aim is to provide better analysis of tactical ad hoc network channel modeling.