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研究生: 武建祥
Wu, Chien-Hsiang
論文名稱: 基於數據驅動機器學習模型實現 MIMO 系統下多樣性天線選擇之研究
A Data-Driven Machine Learning Approach for Adaptive Diversity Antenna Selection in MIMO Systems
指導教授: 賴槿峰
Lai, Chin-Feng
學位類別: 博士
Doctor
系所名稱: 工學院 - 工程科學系
Department of Engineering Science
論文出版年: 2023
畢業學年度: 111
語文別: 英文
論文頁數: 122
中文關鍵詞: 多樣性天線數據驅動支援向量機神經網路誤差向量幅度
外文關鍵詞: diversity antenna, data-driven, Support Vector Machine, Neural Network, Error Vector Magnitude
ORCID: 0000-0003-4199-3996
相關次數: 點閱:79下載:41
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  • 隨著網際網路無遠弗屆的應用所伴隨著行動裝置的普及所引導出無線網路通訊應用的迅速發展,因此無線連網裝置速率提升的需求與日俱增。提升無線網路傳輸品質研究更是現階段無線通訊發展的重心。保持現有的硬體裝置中來提升無線網路的傳輸品質是較容易達成且節省費用的做法之一,因此提升天線的效能進而達到穩定地將無線網路傳輸提升的想法應孕而生,其中利用智能天線的場型選擇已是已廣泛的思考並應用於無線設備之中。本研究是利用多樣性天線選擇的方案應用於具有高度移動性的筆記型電腦環境下,不僅利用無線信號建模和預測機器學習在天線選擇解決方案中,更加入數字驅動方式用以强化提升無線網路的傳輸品質反應出實際運用的結果。其中本文首先針對多樣型天線選擇整體的系統設計與學理說明接著對所取得的無線訊號進行分析與探討,利用無線通訊信號資料集並加入標籤化的數據驅動資料數據等,最後以機器學習的智能方法達成提升天線選擇的精確度。本實驗以支援向量機 (SVM)、神經網路 (NN)等學習方式與傳統以誤差向量幅度 (EVM) 套用於數據驅動中在多樣性天線架構選擇做比較。從實驗結果的預測中證明套用機器學習的方式與傳統以誤差向量幅度 (EVM)的天線選擇的精確度結果比較有著明顯的提升,從而實現移動無線通訊設備的精確的天線調整,提高無線傳輸質量。

    With the widespread application of the Internet and the popularization of mobile devices, the rapid development of wireless network applications leads to an ever-increasing demand for the speed of wireless networking devices. The research on improving the transmission quality of wireless networks is one of the critical points in developing wireless communication at this stage. Keeping the existing hardware device to improve the transmission quality of the wireless network is cost-effective and easy to achieve. Therefore, enhancing the antenna's efficiency to reach stable wireless network transmission emerged. The field type selection using the smart antenna has been widely considered and applied to wireless devices. In this study, the solution of diversity antenna selection applies to the laptop with high mobility that uses wireless signal data modeling and prediction by machine learning. The wireless communication signal data labeling and data-driven intelligent machine learning method improve antenna selection accuracy. This article starts with leading data-driven strategies to enhance the wireless transmission quality of the network, reflecting the results of actual use. This paper first aims at the overall system design and theoretical explanation of the selection of various antennas. It then analyzes and discusses the obtained wireless signals. In this experiment, the wireless signal data and the data-driven training dataset compare the SVM (Support Vector Machine), NN (Neural Network) learning methods, and EVM (Error Vector Magnitude) in diverse antenna selection mechanisms. The prediction from the experimental results presents that the accuracy of the technique of applying machine learning is significantly improved compared with the traditional EVM antenna selection method. Thus, the accuracy of the antenna adjustment of the mobile wireless communication device is realized, and the wireless transmission quality is improved.

    摘要 i Abstract ii Acknowledgments iv Table of Contents v List of Tables vi List of Figures vii Chapter 1 Introduction 1 Chapter 2 Related Works 10 2.1 Fundamental Review 11 2.1.1 CSI 11 2.1.2 MIMO Antenna Architecture 15 2.1.3 Diversity Antenna Differentiation 19 2.1.4 EVM 24 2.2 Antenna Selection Mechanism Theoretical Approach 26 2.3 Overall Architecture 39 2.4 Literature Review 42 2.5 Proposed Scheme 47 Chapter 3 Experiment Preparation 56 3.1 Diversity Antenna Preparation 56 3.2 Experiment Setup 66 Chapter 4 Materials and Methods 68 4.1 Data Preparation 68 4.2 Data Preprocessing 73 Chapter 5 Methodologies 78 5.1 SVM 78 5.2 ANN 85 Chapter 6 Performance Assessment 96 6.1 EVM 98 6.2 SVM 100 6.3 ANN 103 Chapter 7 Conclusions and Future Works 111 7.1 Conclusions 111 7.2 Future Works 114 References 117

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