Impact of user mobility on wireless powered network for AF and DF relaying over FTR fading channel

User mobility causes a significant impact on wireless system performance specifically when cell radius is small like in mm-wave band communication. This research studies, the ergodic outage probability (EOP) performance of wireless power transfer based simultaneous wireless information and power transfer system considering the random way point distributed user mobility. The fluctuating two ray fading model has been used to characterize source to relay and relay to mobile user channel, as it gives the best fit for small-scale fading measurement at the 28 GHz band and can be used to model various conventional and non-conventional fading environments. Closed form expressions for EOP have been derived for all four cases considering amplify-and-forward time switching relaying and decode-and-forward TSR protocols for no diversity and with multiple antenna reception case. Further the asymptotic expressions are also presented to get a better insight on the derived analytical expressions. The system EOP performance have been studied considering user mobility in 1D, 2D, and 3D deployment and results shows that a minute variation in node positioning can impact the system outage performance significantly. Hence the derived performances metric are useful to accurately characterize the system performance with random user mobility. Finally the accuracy of derived expressions has been validated through Monte Carlo simulations.