Improve Throughput and spectrum efficiency using Cell – Free MIMO-NOMA network with user–centric clustering

Abstract In this article, the user resource allocation and scheduling in a cell-free user-centric clustering network coherent transmissions is investigated. However, setup of not sufficient for multi-user transmissions, becomes difficult. To overcome aforementioned problem to provide fairness, an optimum algorithm with perfect scheduling, beam forming, radio frequency transmitter (RFT) proposed. Thereby, cell edge achieves throughput spectrum efficiency. The simulation result shows that proposed method outperforms conventional method. addition, pilot-reusing factor used obtain loss due imperfect channel state information pilot train overhead.