Optimal Power Allocation and Cooperative Relaying under Fuzzy Inference System (FIS) Based Downlink PD-NOMA

Optimal power allocation (PA) is a decisive part of the domain non-orthogonal multiple access (PD-NOMA) technique. In PD-NOMA, users are served at same time and using frequency band, but differing levels. this paper, optimization problem for PA formulated with distance (d), signal-to-noise ratio (SNR), foliage depth (df) constraints. A fuzzy inference system (FIS) addresses by allocating optimal factors (power levels) to each user in vicinity 5G base-station (gNodeB). The proposed incorporates cooperative relaying technique near-user assist far-user facing signal degradation greater path losses. realistic micro-cell analyzed downlink PD-NOMA where superposition coding (SC) used transmitter side, successive interference cancellation (SIC) scheme near-user, maximum combining (MRC) far-user’s receiver, respectively. For both simple presented technique’s bit-error-rate (BER) performance evaluated against various SNR values, it concluded that outperforms PD-NOMA. By FIS cooperation relaying, method guarantees fairness systems while also significantly improving performance.