博碩士論文 103523022 詳細資訊




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姓名 李怡君(Yi-Chun Li)  查詢紙本館藏   畢業系所 通訊工程學系
論文名稱 用於雙向無線通訊之實體層相差網路編碼
(Differential Network Coding at the Physical Layer for Two-Way Wireless Communications)
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摘要(中) 無線通訊所需傳送的資料量越來越多,所以如何在越短時間內傳送相同資料量是重要的研究主題。兩終端節點藉由中繼節點同時傳送訊號至彼此的雙向無線通訊技術為近年來熱門的研究,而實體層網路編碼可以進一步提升頻寬效益。另一方面,相差編碼不需要傳送前導符元做通道估測,故不會造成速率損失,也是一個值得研究的通訊技術。

在本篇論文中,我們研究使用單一中繼節點的放大轉發和解碼轉發之相差編碼兩階段雙向無線傳輸架構,首先將一些既有論文在相同條件下比較。我們使用多位元相位偏移調變,將其在不同的通道模型下做模擬,且本論文也研究三階段雙向無線傳輸架構,並基於相同傳輸速率做比較。

除此之外,本論文提出了一個新的使用M-PSK訊號之解碼轉發架構,我們利用中繼節點在前兩個時間收到的訊號去估計參考訊號,再將估計的參考訊號用於目前訊號的判斷。由模擬結果顯示,我們提出的新架構有最好的錯誤效能。
摘要(英) Wireless communications is required to transmit quantity of data more and more. The important studying topic is how to transmit the same quantity of data in a shorter period of time. Recently, two-way wireless communication is a popular type of communication technology, where two terminal nodes transmit simultaneously to each other with the help of the relay node. The physical layer network coding can further improve bandwidth efficiency. On the other hand, differential encoding is not required to transmit pilot symbols for channel estimation, so it does not cause rate loss. It is also a communication technology worth studying.

In this thesis, we study differential encoding for two-phase two-way wireless transmission with the single-relay for amplify-and-forward (AF) and decode-and-forward (DF). First, we compare existent techniques under the same conditions. We use M-PSK (phase-shift keying) modulation, and do computer simulations under different channel models. We also study three-phase two-way wireless transmission, and compared two-phase transmission with three-phase transmission based on the same transmission rate.

Besides, in this thesis, we propose a new decode-and-forward scheme using M-PSK signals. This scheme uses the received signals at the relay in previous two time slots to estimate the reference signal, and then decide the current signal according to the estimated reference signal. Simulation results show that the proposed scheme has the best error performance.
關鍵字(中) ★ 中繼節點
★ 放大轉發
★ 解碼轉發
★ 雙向中繼網路
★ 實體層網路編碼
關鍵字(英) ★ Relay node
★ Amplify-and-Forward
★ Decode-and-Forward
★ Two-Way Relay Networks
★ Physical Layer Network Coding
論文目次 摘 要 I
Abstract II
致 謝 III
目 錄 V
圖 目 錄 VII
表 目 錄 IX
第一章 緒論 1
1-1 研究動機 1
1-2 內容介紹 2
第二章 相關背景介紹 3
2-1 合作式通訊 3
2-1-1 放大轉發 4
2-1-2 解碼轉發 4
2-2 雙向中繼網路 5
2-3 網路編碼 6
2-3-1 發展簡史 6
2-3-2 蝴蝶網 7
第三章 現有的雙向無線通訊技術之比較與探討 8
3-1 三階段雙向傳輸 8
3-2 回顧兩階段雙向傳輸 10
3-2-1 論文[6]的作法 11
3-2-2 論文[7]的作法 12
3-2-3 論文[8]的作法 13
3-3 論文[6]與論文[8]之差異性 14
3-4 論文[6]不適用於QPSK和8PSK調變之原因 16
3-5 三階段雙向傳輸架構與文獻比較 17
3-5-1 半穩態雷利衰退通道下之模擬結果 17
3-5-2 傑克斯模型衰退通道下之模擬結果 21
第四章 新的使用M-PSK訊號之解碼轉發架構 34
4-1 新三符元偵測方法 34
4-2 模擬結果 43
4-2-1 用於半穩態雷利衰退通道 43
4-2-2 用於傑克斯模型衰退通道 47
第五章 結論 55
參考文獻 56
附 錄 58
參考文獻 [1] R. Ahlswede, N. Cai, S.-Yen R. Li, and R. W. Yeung, “Network Information Flow,” IEEE Transactions on Information Theory, vol. 46, no. 4, pp. 1204-1216, July 2000.
[2] R. Koetter and M. Medard, “Beyond Routing: An Algebraic Approach to Network Coding,” IEEE Infocom, 2002.
[3] S.-Yen R. Li, R. W. Yeung, and N. Cai, “Linear Network Coding,” IEEE Transactions on Information Theory, vol. 49, no. 2, pp. 371-381, Feb. 2003.
[4] T. Ho, R. Koetter, M. Medard, D. R. Karger, and M. Effros, “The Benefits of Coding over Routing in a Randomized Setting,” IEEE International Symposium on Information Theory, 2003.
[5] R. Dougherty, C. Freiling, and K. Zeger,, “Insufficiency of Linear Coding in Network Information Flow,” IEEE Transactions on Information Theory, vol. 51, no. 8, pp. 2745-2759, Aug. 2005.
[6] T. Cui, F. Gao, and C. Tellambura, “Differential modulation for two-way wireless communications: a perspective of differential network coding at the physical layer,” IEEE Transactions on Communications, vol. 57, no. 10, pp. 2977-2987, Oct. 2009.
[7] L. Song, Y. Li, A. Huang, B. Jiao, and A. V. Vasilakos, “Differential modulation for bidirectional relaying with analog network coding,” IEEE Transactions on Signal Processing, vol. 58, no. 7, pp. 3933-3938, July 2010.
[8] W. Guan and K. J. Ray Liu, “Performance Analysis of Two-Way Relaying with Non-Coherent Differential Modulation,” IEEE Transactions on Wireless Communications, vol. 10, no. 10, pp. 2004-2014, June 2011.
[9] W. C. Jakes, Microwave Mobile Communications. Piscataway, NJ: IEEE Press, 1993.
[10] M. F. Pop and N. C. Beaulieu, “Limitations of sum-of-sinusoids fading channel simulators,” IEEE Transactions on Communications, vol. 49, no. 4, pp. 699–708, Apr. 2001.
指導教授 魏瑞益(Ruey-Yi Wei) 審核日期 2016-7-20
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