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研究生:黃美綺
研究生(外文):Huang, Mei-Qi
論文名稱:基於時空學習技術之自監督方法應用於合作式鄰近車輛定位系統
論文名稱(外文):A Self-Supervised Approach for Cooperative Neighboring Vehicle Positioning System based on Spatial-Temporal Learning Techniques
指導教授:鍾偉和
指導教授(外文):Chung, Wei-Ho
口試委員:劉光浩張佑榕
口試委員(外文):Liu, Kuang-HaoChang, Ronald Y.
口試日期:2023-12-20
學位類別:碩士
校院名稱:國立清華大學
系所名稱:通訊工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2023
畢業學年度:112
語文別:英文
論文頁數:41
中文關鍵詞:自監督學習車輛定位系統層次密度分群法圖卷積網路域對抗神經網路長短期記憶
外文關鍵詞:self-supervisedvehicle positioning systemHDBSCANGCNDANNLSTM
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在電動車日益普及的時代,自動駕駛的性能隨著市場需求不斷進步。精確的車輛定位是推進車輛自動化技術超越第三級的關鍵基礎。然而,傳統的全球定位系統(global positioning system GPS)容易受到環境干擾而導致不準確性。現有的提高定位準確性的方法要麼需要基礎設施修改以替代 GPS,要麼需要利用環境信息的先前知識來減少干擾,這兩者在實務上都難以執行。為了提高基於 GPS 的車輛定位系統的準確性,提供更準確的座標估算,我們提出了一個自監督學習結構,由四種學習方法組成:分層基於密度的空間聚類(hierarchical density-based spatial clustering of applications with noise HDBSCAN)、圖卷積網絡(graph convolutional network GCN)、域對抗神經網絡(domain adversarial neural network DANN)和長短期記憶(long short-term memory LSTM)。所提出的框架利用了車輛定位中的空間和時間信息。模擬結果表明,在我們提出的綜合框架內,車輛座標估算的準確性得到了顯著提高。
Precise vehicle positioning is the key foundation for advancing vehicle automation technology beyond level three. However, the conventional global positioning system (GPS) is susceptible to inaccuracies due to environmental interference. Existing works for improving positioning accuracy either require fundamental infrastructure modification to replace GPS or utilize prior knowledge of environmental information to reduce interference, where both are impractical in the real world. To improve the GPS-based vehicle positioning system to provide more accurate coordinate estimates without prior knowledge of environmental information, we propose a self-supervised learning architecture composed of four learning methods: hierarchical density-based spatial clustering (HDBSCAN), graph convolution network (GCN), domain-adversarial neural network (DANN), and long short-term memory (LSTM). The proposed framework utilizes both spatial and temporal information in vehicle positioning. The simulation results indicate that within our proposed comprehensive framework, the accuracy of vehicle coordinate estimates receives significant improvement.
Abstract (Chinese) IAbstract IIAcknowledgements (Chinese) IIIContents IVList of Figures VIList of Tables VII1 Introduction 11.1 Background . . . . . . . . . . . 11.2 Motivation . . . . . . . . . . . 21.3 Main Contributions . . . . . . . 31.4 Organization . . . . . . . . . . 42 System Model 52.1 System Setup . . . . . . . . . . 52.2 Problem formulation . . . . . . 73 Architecture Design 93.1 System Overview . . . . . . . . 93.2 Architecture of the clustering vehicles . . . . . . . . 113.3 Architecture of the classifying clusters . . . . . . . 143.4 Architecture of generating initial estimations . . . . 163.5 Architecture of generating final estimations . . . . . 184 Results and Discussion 194.1 Data Generation . . . . . . . . . . . . . . . 194.2 Simulation setup . . . . . . . . . . . . . . . 224.3 Performance Comparison and Discussion . . . . .255 Conclusion 33Bibliography 34
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