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研究生: 邱偉育
Chiu, Wei-Yu
論文名稱: 最佳化方法在通訊系統中之應用
Apply Optimization Methods to Communication Systems
指導教授: 陳博現
Chen, Bor-Sen
口試委員:
學位類別: 博士
Doctor
系所名稱: 電機資訊學院 - 通訊工程研究所
Communications Engineering
論文出版年: 2010
畢業學年度: 98
語文別: 英文
論文頁數: 63
中文關鍵詞: 多目標最佳化
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  • The cellular downlink power and rate control problems are considered in this thesis. Many studies have extensively examined this topic, but most of them have focused on single-objective (SO) approaches for resource allocation.
    In a real-world scenario, multiple objectives naturally occur, and often conflict with one another. In such a case, the globally optimal solution may not exist. Therefore, the strategy is to provide the base station (BS) or service provider with several Pareto optimal solutions for power and rate assignment, and the BS can select one according to its own preference. To this end, a multi-objective (MO) approach is proposed in this study. For the downlink resource allocation, the BS desires the revenue obtained from the mobile stations (MSs) or users to be maximized, while keeping the total network utility as large as possible. However, the total power resource is constrained and the allocated data rates to MSs are upper bounded by the
    channel capacity. In this thesis, the resource allocation problem is first formulated as a constrained MO problem (MOP), and then transformed into an MOP with only box constraints, which can be solved by the existing multiobjective evolutionary algorithms (MOEAs). A careful design is proposed to provide good initial setting for the employed MOEA. Related analysis has been carried out to examine some interesting properties of the problem, and
    the numerical simulation has been given to verify the proposed MO approach.


    1 Introduction 6 2 Related Works and Preliminary 10 3 Problem Formulation and Related Properties 13 4 Problem Transformation and Related Properties 21 5 A Note on Weighted Sum Method 29 6 Numerical Implementation Issues 34 7 Numerical Examples 41 7.1 Example 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 7.2 Example 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 7.3 Example 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 8 Conclusion 53 Bibliography 54

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