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研究生:楊宗憲
研究生(外文):Tsung-Hsien Yang
論文名稱:2.44GHz室內無線電空-時通道特性之量測與研究
論文名稱(外文):Measurement and Study for IndoorSpatio-Temporal Radio Channel Characteristics of 2.44GHz
指導教授:唐震寰唐震寰引用關係
指導教授(外文):Jenn-Hwan Tarng
學位類別:碩士
校院名稱:國立交通大學
系所名稱:電信工程系
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:2002
畢業學年度:90
語文別:中文
中文關鍵詞:室內無線電
外文關鍵詞:indoor Spatio-Temporal
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本研究利用向量通道脈衝響應量測系統(RUSK Channel Sounder)於交通大學光復校區室內環境下將環境分為三類進行2.44GHz無線電空-時通道脈衝響應定點量測。藉由定點之『功率角度極座標分佈圖』探討多重路徑空-時分佈與量測環境的關係,並經由多重路徑之TOA與AOA統計分析發現TOA的機率密度可用『指數衰減函數』表示其分佈,而AOA的分佈則呈現數個(通常不大於三個)主要叢集特性,各叢集之主要指向與傳播環境及發射端和接收端相對位置有關。於是本論文提出叢集式機率密度函數描述AOA之分佈,另外根據分析TOA與AOA的聯合機率密度發現多重路徑在時間與空間上相關性並不明顯。最後統計空-時通道之特性參數如: (mean excess delay)、 (delay spread)、 (angular spread)、 (angular constriction)、 (maximum fading angle),用以描述室內無線傳播通道在空間及時間上之特性,並做為設計室內無線通信系統的參考數據。
In this thesis, an advanced channel sounder was employed to perform the spatio-temporal radio channel characteristics measurement in NCTU indoor environment. The relation between multipath components in spatio-temporal domain and measurement site is discussed with power angle profiles. It is found that the probability density of arrival can be described by an exponential decaying function and the distribution of angle of arrival can be grouped to several main cluster where the number of cluster is site dependent. Then a clustered probability density function is proposed to describe the distribution of angle of arrival where several spatio-temporal channel parameters are applied, which includes (mean excess delay)、 (delay spread)、 (angular spread)、 (angular constriction)、 (maximum fading angle). Characteristics of these parameters are discussed and studied also.
目錄
第一章 緒論……………………………………………………………1
第二章 室內無線電空-時通道模型之介紹……………………………3
2.1 前言……………………………………………………………3
2.2 Saleh-Valenzuela模型之介紹………………………………5
2.3 Modified Saleh-Valenzuela模型之介紹…………………7
2.3.1 模型簡介………………………………………………7
2.3.2 量測系統與量測方法…………………………………8
2.3.3 量測分析………………………………………………9
2.4 室內之射線追蹤模型介紹………………………………11
2.4.1 射線固定座標系統……………………………………11
2.4.2 三維均勻繞射公式……………………………………13
2.4.3 傳播模型………………………………………………17
第三章 室內無線電空-時通道特性之量測分析……………………18
3.1 前言…………………………………………………………18
3.2量測設備與量測方法………………………………………18
3.3 量測地點規劃………………………………………………21
Site#1…………………………………………………………21
Site#2…………………………………………………………22
3.4 空-時通道之定點量測結果分析……………………………26
3.4.1 Site#1量測分析………………………………………26
(i) 接收點位於走廊………………………………………26
(ii) 接收點位於教室………………………………………28
3.4.1 Site#2量測分析………………………………………40
(i) 接收點位於走廊………………………………………40
(ii) 接收點位於教室………………………………………46
第四章 室內無線電空-時通道特性之統計分析與模型建構………50
4.1 有效path之擷取……………………………………………50
4.2 TOA統計分析…………………………………………………53
4.3 AOA統計分析與模型建構……………………………………57
4.3.1 AOA統計分析…………………………………………57
4.3.2 AOA預估模型建構……………………………………62
4.4 TOA/AOA 聯合統計分析……………………………………67
4.5 空-時通道之特性參數統計…………………………………72
第五章 結論……………………………………………………………75
參考文獻
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[13] J. B. Andersen,“Transition zone diffraction by multiple edges,”IEE Proc. Microwave Antennas Propagation﹐vol. 141 ﹐NO. 5, pp.382-384﹐October 1994.
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[15] Mangold, S.; Lott, M.; Evans, D.; Fifield, R.” Indoor radio channel modeling-bridging from propagation details to simulation,” The Ninth IEEE International Symposium on , Volume: 2 , pp. 625 —629, 1998.
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[17] M. Lotter and P. van Rooyen, “Cellular channel modeling and performance of DS-CDMA system with antenna array,” IEEE J. Select. Areas Commun., vol. 17, NO. 12, December 1999.
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