近年來，非正交多重接取系統被視為第五代行動通訊的重要技術。在本篇論文中，我們設計了一個結合多天線的非正交多重接取系統去提升上行傳輸中的總通道容量，其中假設在基地台端有 N 根天線並利用連續干擾消除，使之可以在相同的頻譜資源下，同時服務 2"N" 個使用者端設備。由於多個用戶復用相同頻率區塊，導致使用者端設備彼此互相干擾，所以我們研究出使用者組別的選擇方法和次佳的功率控制，用以消除使用者端設備間的干擾，及在最低目標通道容量的限制下去最大化總通道容量。在使用者組別的選擇方法中，第一步驟為去比較我們設計的參數大小，此參數用來平衡會影響總通道容量因素，以達到最佳的使用者組別選擇。接著，使用功率控制參數去做次佳的功率控制，在這篇論文中，我們整理出四種情況的功率控制參數值。最後模擬結果顯示提出的方法可以明顯提升系統的總通道容量。;Non-orthogonal multiple access (NOMA) has recently been considered as a key technique for 5G cellular systems. In this thesis, we develop a NOMA system equipped with multi-antenna to enhance the sum capacity of uplink. It is proposed that the base station (BS) with N antenna supports 2"N" user equipment (UEs) in the same spectrum resource simultaneously, and successive interference cancellation (SIC) is applied at the BS. Because the multiplexing of multiple users within the same frequency block leads to the interference between UEs, we investigate a set selection algorithm and a suboptimal power control to mitigate the interference and to maximize the sum capacity under minimum target rate. The set selection algorithm is firstly applied by comparing the ratio which balances the causes effecting the sum capacity. Second, the suboptimal power control is utilized by power control factors which can be sorted into four conditions. The simulation results show that the proposed schemes can significantly improve the sum capacity.
