在本篇論文中，我們針對多載波非正交多重接取下行系統之資源分配進行研究。此系統中包含一個基地台與K個使用者分享N個子載波，而兩個使用者被選擇使用一個子載波做訊號傳送。我們利用功率及子載波分配將最佳化問題公式化，在有使用者公平性之限制下最大化整個系統之傳送容量。在給定子載波分配的情況下，我們首先推導了最佳功率分配比，最大化子載波上使用者的最小傳送容量，進而達到兩個使用者之間之公平性。有了最佳功率分配比後，我們接著根據使用者之傳送容量，發展一個基於通道資訊原則之低複雜度次佳聯合功率及子載波分配演算法。模擬結果顯示我們所提出之系統比傳統正交分頻多重接取系統更能有效提升系統之效能。

In this thesis, we investigate resource allocation for a downlink multicarrier non-orthogonal multiple access system with a base station and K users sharing N subcarriers, where two users are selected to share the same subcarriers for signal transmission. We formulate an optimization problem in terms of subcarrier and power allocation to maximize the system capacity under a user fairness constraint. For a given subcarrier allocation, we first derive an optimal power ratio based on maximizing the minimum user capacity in a subcarrier under fairness consideration. Based on this optimal power ratio, a suboptimal algorithm with a low-complexity channel-gain-based criterion is then developed for joint power and subcarrier allocation, which explores the behavior of the user capacity to achieve the user fairness constraint. Simulation results demonstrate that the proposed scheme provides significant capacity gains over the conventional orthogonal frequency division multiple access scheme.

摘 要
誌　謝
目 錄
第一章 簡介
第二章 系統模型及問題公式化
第三章 提出之演算法
第四章 模擬結果及比較
第五章 結論
附 錄 論文英文本
Absrtract.........i
Contents..........ii
List of Figures...iii
I. Introduction....1
II. System Model and Problem Formulation....4
A. System Model....4
B. Problem Formulation....6
III. Propsoed Resource Allocation Method....8
A. The Optimal Power Ratio....8
B. Suboptimal Joint Power And Subcarrier Allocation....11
IV. Simulation Results....15
V. Conclusion....22
References....23

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