臺灣博碩士論文加值系統

本論文中將會提出一種新的編碼規則使用於合作式通訊系統，包含2x1、3x1、4x1更甚至於多個Relay，藉由透過改變傳輸協定，可以採用類比於多天線系統運用空時碼，有效結合空間分集以提升系統效能。此規則名為Alamouti部分式分散式空時碼(Partially Distributed Space-Time Coding)，本論文中將針對Alamouti部分分散式空時碼在平坦衰弱通道 (Flat Fading Channel) 下進行研究 ，且模擬出Alamouti部分分散式空時碼 (Partially Distributed Space-Time Coding) 在放大與轉發 (Amplify and Forward) 方法的符號錯誤率，並與Alamouti全分散式空時碼　(Full Distributed Space-Time Coding) 做模擬與比較。經過模擬結果得知，Alamouti部分分散式空時碼 (Partially Distributed Space-Time Coding)的表現優於Alamouti全分散式空時碼　(Full Distributed Space-Time Coding)。

In this paper, we will propose a new coding rules used in cooperative communication systems, comprosing 2x1,3x1,4x1 even multiple relay systems, using the virtual relay to simplifies and streamlines the process of the signal transmission, the coding rules names Alamouti Partially Distributed Space-Time Coding, we research on Alamouti Partially Distributed Space-Time Coding system in Flat Fading Channels. The symbol error rate performances of Alamouti Partially Distributed Space-Time Coding system on Flat Fading Channels using Amplify and Forward scheme is simulated and compared with Alamouti Full Distributed Space-Time Coding. We show through simulation that performance of Alamouti Partially Distributed Space-Time Coding is better than Alamouti Full Distributed Space-Time Coding.

目錄
第一章 緒論 10
1.1引言 10
1.2研究動機 11
第二章 合作式通訊系統架構與理論基礎 12
2.1 合作式通訊系統模型 12
2.2 合作式通訊中繼協定 14
2.3 無線通道的傳播特性 15
2.3.1 無線電波的傳送環境 15
2.3.2 傳播路徑衰落 16
2.3.3 可加性白高斯雜訊 16
2.4 空時編碼 (STBC) 18
2.5 正交合作式協定與非正交合作式協定 20
2.5.1 正交合作協定 20
2.5.2 非正交合作協定 21
第三章 部分分散式空時碼系統於平坦衰落通道 22
3.1 Alamouti分散式空時碼系統架構 22
3.2 Alamouti 部分分散式空時碼系統架構 25
3.3 單中繼正交合作式通訊 28
3.4 單中繼非正交合作式通訊 30
3.5 多中繼Alamouti 部分分散式空時碼系統架構 32
第四章 Alamouti部分分散式空時碼系統於平坦衰落通道 36
4.1 Alamouti部分分散式空時碼系統於平坦衰落通道之分析與模擬與結果 36
4.2 Alamouti部分分散式空時碼系統於特定通道之分析與模擬與結果 38
4.3多中繼Alamouti部分分散式空時碼系統於平坦衰落通道之分析與模擬與結果 49
第五章 結論 50
參考文獻 51

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