臺灣博碩士論文加值系統

合作式通訊(cooperative communications)是近年相當熱門的研究領域，在新一代無線通訊系統中占有相當重要的地位。網路編碼則是將多個傳送端傳來的訊號經由編碼的技術結合後傳輸至下一個接收端，能有效的提供傳輸效率。本論文將建構一個無線通訊系統，由動態解碼轉傳(Dynamic Decode and Forward, DDF)協定結合網路編碼，考慮在多個中繼站下，如何選擇適當的一個中繼站,並且分析雷利(Rayleigh Fading Channel)、萊斯(Rician Fading Channel)、仲上(Nakagami Fading Channel)三種無線通道下的中斷情形。並且推導此系統的中斷機率之理論值，並且將此理論值和模擬值做比較看是否符合。經過模擬與分析後發現此系統在網路編碼階段是否成功傳輸，將是影響整體中斷機率的最主要因素，並且了解有越多的中繼站可供選擇，則系統的中斷機率也有顯著的下降。

Cooperative communication is a very popular research area, and it plays an important role in the new generations of wireless communications. Network coding technology combines several messages, and transmit the mixed messages into next receiver for providing higher transmitting throughput and performance. This thesis builds a wireless communication system combined with dynamic decode and forward (DDF) and network coding technology. We consider the situation when the system has multiple relays, how to select a proper relay? We research outage probability of this system under Rayleigh, Rician and Nakagami fading channels. We choose a single relay to transmit, and derive the theoretical value of outage probability. Last, we compare theoretical value with simulation result. After simulation and analysis, we find whether the system can transmit successfully in the network coding stage is the main factor in affecting outage probability, and we know when we get more relays, outage probability is lower.

誌謝辭 i
中文摘要 ii
英文摘要 iii
目錄 iv
圖目錄 vi
第一章 簡介 1
1.1 研究動機與目的 1
1.2 論文架構 1
第二章 背景介紹 2
2.1 合作式通訊 2
2.2 網路編碼 3
2.3 動態解碼轉傳協定 4
第三章 系統模型建構 6
3.1 系統假設 6
3.2 系統模型 7
3.3 中斷機率 13
3.4 中繼點選擇方式 16
第四章 雷利、萊斯、仲上衰減通道 17
4.1 雷利衰減通道 17
4.2 萊斯衰減通道 18
4.3 仲上衰減通道 19
第五章 中斷機率模擬與理論值之推導與分析 20
5.1 雷利衰減通道在Min-Max selection criterion下之理論值推導與模擬 20
5.2 萊斯衰減通道之理論值與模擬 24
5.3 仲上衰減通道之理論值與模擬 26
第六章 結論及未來展望 28
參考文獻 29

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http://en.wikipedia.org/wiki/Rayleigh_distribution
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