不完美通道中放大轉遞中繼點對於訊號品質的改善

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葉政凱(Zheng-Kai Ye) 查詢紙本館藏

畢業系所

通訊工程學系

論文名稱

不完美通道中放大轉遞中繼點對於訊號品質的改善
(Improvement of Imperfect Channel by Using Amplify-and-Forward Relay)

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摘要(中)

近年來，資訊化的時代來臨，通訊技術中透過中繼點傳輸無線通訊開始蓬勃發展，尤以合作式通訊之議題廣為討論，合作式的協助通信在不需增加行動裝置複雜度情形下又能達到空間分集的目的，因而受到許多重視。本論文利用在中繼端(relay，R)使用放大轉遞(amplify-and-forward，AF)，先將功率放大以便目的端(destination，D)接收，且可在接收端先獲取通到狀態資訊(channel state information，CSI)，S-R 通道資訊則會先經壓縮量化後再由專用通道傳至目的端，在目的端同時接收來自資源端(source，S)與中繼端之訊號，依據最大比例合成(maximal ratio combining，MRC)進行接收，論文模擬在接收端其訊雜比(SNR)分布的機率密度函數(PDF)，比較各通道狀態影響接收SNR 值的情形，並進一步探討其平均準位跨越率(average level crossing rate, LCR)和平均衰落區間(average fade duration, AFD)，討論通道衰減程度。

摘要(英)

In recent years,the technology through in wireless communication is popular in the world.Especially,more and more people discussed the cooperative communication.The experts talked about the advantages that it is not only easy to achieve but also realize the diversity technology. This paper uses the Amplify and Forward relay to amplify the power for the destination receiving channel state information(CSI).S-R channel information will be quantified in relay and transmited to the destination in delicated channel.The destination receives the informations from the source and the relay by using maximal ratio combining.The paper simulates the SNR distribution and compares with the SNR distribution from each channel.Finally,the paper simulates level
crossing rate and average fade duration in this paper.

關鍵字(中)

★ 放大轉遞
★ 中繼點

關鍵字(英)

論文目次

摘要 I
英文摘要 II
致謝 III
目錄 IV
圖目錄 V
表目錄 VI
第一章緒論 1
1-1 研究背景 1
1-2 研究動機 4
1-3 文獻探討 5
1-4 論文大綱 7
第二章無線通道環境 8
2-1 簡介 8
2-2 常見通道模型紹 8
2-3 多重路徑衰減效應 13
第三章合作式通訊系統 14
3-1 合作式通訊系統模型 14
3-2 合作式通訊系統應用發展 15
第四章系統模型 17
4-1 系統架構 17
4-2 通道量化 18
第五章模擬環境與結果說明 22
5-1 模擬環境 22
5-2 模擬結果 24
第六章結論 34
參考文獻 35

參考文獻

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指導教授

林嘉慶(Jia-Chin Lin)

審核日期

2017-7-3

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