本篇論文主要是針對無線通訊裝置(例如：手機、PDA)在有限的尺寸大小下，如何提高分集增益以增強其上鏈的抵抗通道衰減的能力，因此提出了一個同時具備時間及空間分集增益的架構。首先是時間分集增益的部份，我們利用分碼多工系統的耙型接收器分離不同時間延遲的多路徑，以獲得時間分集增益。另外在空間分集增益的部份，由於無線通訊裝置為了移動方便，裝置的尺寸不會太大，故要使用多天線多輸出的技術便會受到尺寸限制，因此我們利用接收端(例如：基地台)裝設指向性天線陣列，這樣能得到角度上的空間分集增益。而在抵抗多用戶干擾的部份，因為智慧型天線陣列的複雜度很高，所以我們使用完全互補碼做為展頻碼，除了能夠抵抗多路徑及多用戶干擾外，複雜度也比智慧型天線低。本論文的貢獻在於提出一種將角度及時間分集做結合的新的架構。

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摘要 I
誌謝 II
目錄 III
圖目錄 V
變數列表 VIII
第一章 導論 1
1.1 背景 1
1.2 研究動機 2
1.3 論文架構 2
1.4 基礎知識 2
1.4.1 天線陣列 2
1.4.2 互補碼 4
第二章 多用戶角度與時間分集CDMA系統於多路徑複高斯衰減通道 9
2.1 系統架構圖 9
2.2 系統分析 11
2.2.1 多路徑分析 15
2.2.2 多用戶干擾分析 22
2.3 性能分析 27
2.4 DIVERSITY ORDER推導 31
2.5 理論分析 35
第三章 角度與時間分集CC-CDMA系統於子載波完全相關之多路徑複高斯衰減通道 39
3.1 系統架構圖 39
3.2 系統分析 41
3.3 性能分析 48
3.4 DIVERSITY ORDER推導 51
3.5 理論分析 56
第四章 角度與時間分集CC-CDMA系統於子載波具相關性之多路徑複高斯衰減通道 61
4.1 系統分析 61
4.2 性能分析 70
4.3 DIVERSITY ORDER推導 73
4.4 理論分析 76
第五章 結論 81
附錄A 積分式變數變換 82
附錄B 接收端訊號結合之權重證明 83
附錄C 完全互補碼的正交互補性證明 84
附錄D CDMA通道容量定理 91
附錄E 拉普拉式(Laplace)轉換初值定理 92
附錄F CC-CDMA通道容量定理之子載波全相關 93
附錄G CC-CDMA通道容量定理之子載波不相關 94
參考文獻 95

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