本論文提出一個以正交分頻多工(OFDM)為基礎,結合非正交多重接取(NOMA)的系統,搭配使用者迭代選擇演算法、子載波配置演算法等資源配置方式,來提升系統整體的通道容量。;In this paper, we propose a non-orthogonal multiple access systems based on orthogonal frequency division multiplexing (NOMA-OFDM) system with user grouping and subcarrier allocation algorithm to improve the sum capacity.