Publication

Abstract : The future wireless communication networks (beyond 5G) are intended to provide seamless connectivity, higher data rates, and lower latency. The intelligent reflecting surface (IRS) promises extended network coverage. The non-orthogonal multiple access (NOMA) technique provides higher spectral efficiency and supports a larger number of users. In general, the cell-edge users far from the base station are affected by severe fading, which may result in an outage. To overcome this issue, we propose an IRS-aided device-to-device (D2D)-enabled two cells coordinated NOMA system in which a common cell-edge user acts as D2D receiver. The cell-edge user receives the signals from near users, IRSs, and both base stations to achieve better diversity. We analyze the outage probability of cell-edge user, while all the fading channels are assumed Nakagami- m and obtain a closed-form expression at higher signal-to-noise ratios. We develop an algorithm to find the ergodic capacity of the cell-edge user. We validate the mathematical expressions with simulation results and see a substantial improvement in outage performance over the existing systems.