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研究生：	劉益興 Yi-Shing, Liou
論文名稱：	高空平台系統CDMA語音通話與位元錯誤之分析 Analysis of Voice Capacity and BER for HAPS CDMA Systems
指導教授：	黃政吉 Huang, Jeng-Ji
學位類別：	碩士 Master
系所名稱：	電機工程學系 Department of Electrical Engineering
論文出版年：	2009
畢業學年度：	97
語文別：	中文
論文頁數：	50
中文關鍵詞：	高空平台、分碼多重存取、上鏈、下鏈、最佳化理論
英文關鍵詞：	High altitude platform stations (HAPSs), code division multiple access (CDMA), uplink, downlink, optimization theory
論文種類：	學術論文
相關次數：	點閱：191 下載：3
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HAPS(High Altitude Platform Station)為一運作在高公21公里處的高空平台，主要用於傳送寬頻應用，以及分碼多重存取 (code division multiple access，CDMA)為基礎的國際行動通訊系統-2000(IMT-2000)無線通訊，其頻帶分別為毫米波段和第三代行動通訊(3G)頻帶。本論首先主要研究在於HAPS系統的不穩定造成細胞在下鏈與上鏈容量的改變，提出兩種天線型式探討HAPS系統位移時對CDMA細胞系統的上鏈與下鏈容量的影響和細胞服務範圍受改變的大小，並且在下鏈部份應用碼的正交因子來說明對容量的改變。而後第二部份利用波束在地面的真實投影計算每個細胞主波束的投射位置，建構出無縫隙系統，並以最佳化理論計算各個細胞最佳的容量，比較最佳化前後的系統容量差異。最後一部份以多架HAPS系統擴大服務範圍，利用兩種通道模型simplified通道模型與Rice-lognormal通道模型計算細胞各層的容量，並且分析比較兩種通道模型所得結果之差異。

High altitude platform stations (HAPSs) operate at an altitude of about 21 km. They are widely known as a new means to provide both broadband applications and code division multiple access (CDMA)-based international mobile telecommunications-2000 (IMT-2000) communications using millimeter wave and third generation (3G) bands, respectively. In this thesis, we firstly consider the impact of platform displacement on both the uplink and downlink capacity and the cell deployment movement under two types of antennas. The orthogonality factor is applied in the calculation of the downlink capacity. Secondly, we build up a seamless HAPS system model under real beam projection on the ground. The cell capacity is then calculated using optimization theory. Finally, multiple-HAPS systems are used to enlarge service area. Two kinds of channel models are taken into consideration: a simplified channel model and a Rice-lognormal channel model. The uplink capacity is compared and analyzed under these two kinds of channel model.

中文摘要....................................................I
英文摘要...................................................II
目    錄..................................................III
表 目 錄...................................................VI
圖 目 錄..................................................VII

第一章 緒論.................................................1
1     HAPS系統簡介........................................1
2     HAPS系統與既有系統比較...............................3
3     文獻回顧............................................4
4     研究動機............................................5
第二章 系統的不穩定與細胞偏移.................................7
1     前言...............................................7
1.1   細胞架構............................................7
1.2   天線增益............................................8
1.2.1 指向性天線..........................................8
1-2.2 多波束天線..........................................8
1.3   路徑損失............................................9
1.4   功率控制............................................9
1.5   遮蔽效應............................................9
1.6   多路徑衰退.........................................10
2     系統架構...........................................10
3     系統的不穩定與細胞偏移..............................11
4     適應性天線的調整....................................12
5     HAPS系統偏移下的容量................................13
5.1   HAPS系統偏移下的上鏈容量............................13
5.1.1 同細胞干擾.........................................13
5.1.2 他細胞干擾.........................................13
5.1.3 上鏈容量...........................................15
5.2   HAPS系統偏移下的下鏈容量............................16
5.2.1 一個基地台的總發送功率..............................16
5.2.2 同細胞與他細胞干擾..................................16
5.2.3 下鏈容量...........................................17
6     數值結果與討論.....................................18
6.1   細胞偏移面積.......................................18
6.2   細胞的上鏈與下鏈容量................................19
6.2.1 細胞的上鏈容量.....................................19
6.2.2 細胞的下鏈容量.....................................20
6.3   討論............................................. 21
第三章 真實投影下的HAPS系統.................................22
1     HAPS系統真實投影下的細胞建構.........................22
1.1   利用細胞邊緣交點尋找細胞中心座標......................22
1.2   利用兩個細胞中心尋找細胞邊緣交點......................24
2     系統容量的最佳化....................................26
2.1   各個參考細胞的同細胞與他細胞干擾之計算................26
2.2   各個細胞使用者人數之計算.............................27
3     數值分析與結果.....................................28
第四章 Rice-Lognormal通道下的效能分析.......................30
1     多架HAPS系統模型...................................30
2     數值分析...........................................31
2.1   Simplified通道模型.................................31
2.1.1 同細胞干擾與他細胞干擾..............................31
2.1.2 他系統干擾.........................................32
2.1.3 上鏈容量...........................................33
2.2   Rice-Lognormal(RLN)通道模型........................33
2.2.1 多重存取干擾的計算..................................33
2.2.2 平均錯誤機率.......................................34
3     數值分析結果與討論..................................36
3.1   RLN通道模型分析結果.................................36
3.2   simplified通道模型與RLN通道模型的比較................37
第五章 總結................................................39
1     總結..............................................39
參考文獻...................................................40
附錄ㄧ....................................................42
附錄二....................................................44
                                

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