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姓名 秦婉瑛(Wan-Ying Chin) 查詢紙本館藏 畢業系所 通訊工程學系 論文名稱 非同調多用戶偵測
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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傳送訊號至彼此的雙向中繼網路為近年來熱門的研究,而利用實體層網路編碼的兩階段雙向中繼網路更是一種高頻譜效益的技術。數個使用相差相位調變的兩階段雙向中繼網路架構被提出,這些架構可以避免由前導符元導致的速率損失。
在本篇論文中,我們首先專注於相差MPSK在兩階段雙向中繼網路架構的解碼轉發。針對中繼節點的最大可能性(maximum-likelihood)檢測器,我們提出了兩個終端的發送信號的距離測量。基於所提出的距離,我們解釋其用戶不能使用相同星座圖的原因,並找到了使用決策反饋與沒使用決策回饋的最佳星座圖角度。接著,我們將此中繼點的非同調二用戶偵測,推廣為非同調三用戶偵測。我們將這些結果應用在非正交多存取,並且以電腦模擬比較其與正交多存取的錯誤率。
摘要(英) Wireless communications is required to transmit quantity of data more and more. An important studying topic is how to transmit the same quantity of data in a shorter period of time. Recently, two-way relaying is a popular subject, where two terminal nodes transmit to each other with the help of the relay node. Two-phase two-way relaying (TPTWR) using physical-layer coding is a bandwidth efficient technique. Several TPTWR schemes using differential phase-shift keying (DPSK) which avoid the rate loss due to pilot symbols were proposed.
In this thesis ,we first focus on differential MPSK for TPTWR using decode and forward technique. We propose that the signal constellation of one terminal is the signal constellation of the other terminal rotated by an angle. For the noncoherent maximum-likelihood detector at the relay, we propose a distance measure for the transmitted signals of the two terminals. Based on the proposed distance, we find the optimal angles for both cases of using decision feedback or not. Then the noncoherent two-user detection at the relay is extended as noncoherent three-user detection. We apply these results to NOMA(non-orthogonal multiple access), and compare it with OMA(orthogonal multiple access) by computer simulation.
關鍵字(中) ★ 非同調多用戶偵測 關鍵字(英) ★ Noncoherent multi-user detection 論文目次 目錄
摘要 I
Abstract II
目錄 III
圖目錄 V
表目錄 VII
第一章 緒論 1
1.1 研究動機 1
1.2 內容介紹 2
第2章 相關背景回顧 3
2.1 合作式通訊 3
2.1.1 放大轉傳 4
2.1.2 解碼轉傳 5
2.2 網路編碼 5
2.3 雙向中繼網路 6
第3章 雙向中繼網路通訊技術回顧 9
3.1 三階段雙向通訊 9
3.2 兩階段雙向通訊回顧 10
3.3 兩階段轉傳雙向通訊架構 11
3.3.1 論文[6]非同調最大相似檢測 12
3.3.2 論文[7]多重符元最大相似檢測 13
3.3.3 論文[9]三符元估測檢測 14
3.3.4 論文[10]架構一 16
3.3.5 論文[10]架構二 16
第4章 針對非同調最大可能性偵測所推算之距離及星座圖設計 17
4.1 利用非同調最大相似檢測法推算之距離 17
4.1.1設定距離公式 17
4.1.2雙用戶推算之距離及星座圖設計 20
4.2 模擬結果求出較佳星座圖 25
4.2.1 雙用戶模擬之較佳星座圖 25
4.2.2 三用戶模擬之較佳星座圖 27
4.5 模擬結果探討 29
第5章 非同調多用戶探討 31
5.1 非同調非正交多存取 31
5.1.1傳送端設計 31
5.1.2接收端設計 32
5.1.3模擬結果探討 34
5.2 同調非正交多存取 36
5.2.1傳送端與接收端 36
5.2.2模擬結果與探討 37
第6章 結論 39
參考文獻 40參考文獻 [1] S. Zhang, S. C. Liew and P. P. Lam, “Hot topic: Physical layer network coding,” in Proc. MobiCom06, pp. 358365, 2006.
[2] S. Zhang, S. C. Liew and L. Lu, “Physical layer network coding schemes over finite and infinite fields,” in Proc. IEEE GLOBECOM, pp. 16, Nov. 2008.
[3] B. Nazer and M. Gastpar, “Reliable physical layer network coding,” in Proc. IEEE, vol. 99, no. 3, pp. 438-460, Mar. 2011.
[4] B. Rankov and A. Wittneben, “Spectral efficient protocals for half-duplex fading relay channels,” IEEE J. Sel. Areas Xommun., vol. 25, no. 2, pp. 379-389, Fdb. 2007.
[5] T. Cui, F. Gao, T. Ho and A. Nallanathan, “Distributed space-time coding for two-way wireless relay networks,” in Proc. IEEE ICC, May 2008.
[6] B. M. Hochwald and T. L. Marzetta, “Unitary space-time modulation for multiple-antenna communications in Rayleigh flat fading,” IEEE Trans. Inf. Theory, vol. 46, pp. 543-564, Mar. 2000.
[7] 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 Trans. Commun., vol. 57, no. 10, pp. 2977-2987, Oct. 2009.
[8] L. Song, Y. Li, A. Huang, B. Jiao and A. V. Vasilakos, “Differential modulation for bidirectional relaying with analog network coding,” IEEE Trans. Signal Proc., vol. 58, no. 7, pp. 3933-3938, July 2010.
[9] W. Guan and K. J. R. Liu, “Performance analysis of two-way relaying with non-coherent differential modulation,” IEEE Trans. Wireless Commun., vol. 10, pp. 20042014, June 2011.
[10] Y. C. Li, “Differential network coding at the physical layer for two-way wireless communications,” Master Thesis, National Central University, 2016.
指導教授 魏瑞益(Ruey-Yi Wei) 審核日期 2019-7-17 推文 plurk
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