Relay selection in the multiple-mobile-relay-based D2D system over N-Nakagami fading channels
Xing Liu, Tingting Lu, Lingwei Xu, Hao Zhang · International Journal of Computational Science and Engineering · 2017
Based on variable-gain amplify-and-forward relaying scheme, the lower bound on the outage probability of the multiple-mobile-relay-based device-to-device system with relay selection over N-Nakagami fading channels is investigated in this paper. By the method of harmonic mean of positive random variables, the closed-form expressions for the lower bound on outage probability are derived. Then the outage probability performance under different conditions is evaluated through numerical simulations to verify the analysis. The simulation results showed that the number of mobile relays, the fading coefficient, the number of cascaded components, the relative geometrical gain, and the power-allocation parameter have an important influence on the outage probability performance.