NOMA-enabled Cooperative V2V Communications with Fixed-Gain AF Relaying

By virtue of its improving bandwidth efficiency along with user fairness, non-orthogonal multiple access (NOMA) technique is considered a promising method for next-generation wireless communication systems. Since fading effect channels in vehicle-to-vehicle (V2V) systems are more severe than those traditional systems, this study, we employ the power-domain downlink NOMA cooperative V2V to enhance data transmission capacity and network efficiency. In proposed system, base station communicates two vehicular nodes, namely near far users, through relay vehicle employing fixed-gain amplify-and-forward scheme. real-life scenarios, users move high velocities; hence, corresponding between these nodes exposed as having double-Rayleigh characteristic which coefficient channel modeled product Rayleigh distributed random variables. To analyze system performance, first investigate outage probability derive exact closed-form expressions users. Then, make ergodic analysis obtain solution user. Furthermore, performances NOMA-enabled compared simulation results orthogonal approach. We also give analytic numerical evaluate performance show consistency Monte-Carlo simulations analytical derivations. It observed that even small power allocation, both mostly outperform