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研究生:潘聿銘
研究生(外文):Yu-Ming Pan
論文名稱:用於上行大量多輸入多輸出系統的相差APSK&QAM
論文名稱(外文):Differential APSK & QAM in Uplink Massive MIMO Systems
指導教授:魏瑞益
指導教授(外文):Ruey. Yi. Wei
學位類別:碩士
校院名稱:國立中央大學
系所名稱:通訊工程學系
學門:工程學門
學類:電資工程學類
論文出版年:2018
畢業學年度:107
語文別:中文
論文頁數:69
中文關鍵詞:大量多輸入多輸出系統上行APSKQAM相差編碼
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大量多輸入多輸出系統是近年來熱門的研究,而相差編碼不需要傳送前導序列做通道估測,因此不會有前導序列汙染的問題。最近一個用於上行的大量多輸入多輸出的相差編碼QAM方法被提出,它在接收天線多達1000根時,錯誤效能會比傳統的相差APSK方法還要好。

在前人的論文中,指出此相差QAM方法的一些問題並解決這些問題,為16-QAM建構新的相差編碼表。在使用同樣偵測器下,比較相差16-APSK與相差16-QAM的錯誤效能,以及使用不同偵測器比較同樣傳送端的錯誤效能,模擬結果顯示無論接收天線個數多少,16-APSK都有最好的錯誤效能。

在本篇論文中,我們為32-QAM建構新的相差編碼表。在使用同樣偵測器下,我們比較相差32-APSK與相差32-QAM的錯誤效能,以及使用不同偵測器比較同樣傳送端的錯誤效能,模擬結果顯示無論接收天線個數多少,32-APSK都有最好的錯誤效能,且更改16-APSK內外點數不同的星座圖。

除此之外,針對兩階段雙向中繼無線通訊,我們提出一種中繼點的非同調檢測法。根據此檢測法的雜訊分析,我們讓兩傳送端使用轉動不同角度的MPSK訊號星座圖做相差編碼,並提出了幾種架構,以改善中繼點的錯誤率。先將中繼點判斷兩傳送端訊號的做法改成基地台判斷兩用戶訊號,再將其延伸到更多用戶情形。
Massive MIMO systems are popular studies in recent years. Differential encoding scheme is not required to transmit pilot sequence for channel estimation, so it does not cause pilot contamination. A differentially encoded QAM (quadrature amplitude modulation) scheme for uplink massive MIMO was proposed recently which outperforms conventional differential APSK (amplitude-phase shift keying) scheme for 1000 receiver antennas.

In the predecessors' papers raise and try to resolve some questions about this differential QAM scheme. construct new tables for differentially encoded 16-QAM. compare differential 16-QAM with differential 16-APSK for the same detector, and compare the detector with a conventional detector for the same transmitter. Simulation results show that differential 16-APSK has the best error performance for any number of receiver antennas.

In this letter, we construct new tables for differentially encoded 32-QAM. We compare differential 32-QAM with differential 32-APSK for the same detector, and compare the detector with a conventional detector for the same transmitter. Simulation results show that differential 32-APSK has the best error performance for any number of receiver antennas. and changing the number of points inside and outside for 16-APSK.

In addition, for two-way two-phase relaying wireless communication, we propose a non-coherent detection method for relay points. According to the noise analysis of this detection method, we let the two transmitting end use the MPSK signal constellation diagrams rotating at different angles for phase difference encoding, and propose several architectures to improve the error rate of the relay point. The paper will first change the way the relay point judges the two transmitter signals to the basestation to determine the two user signals, and then extend it to more users.
論文摘要 III
Abstract IV
目錄 V
圖目錄 VII
表目錄 IX
第一章 緒論 1
1.1 背景與研究動機 1
1.2 內容介紹 3
第二章 相關背景介紹 4
2.1 同調大量多輸入多輸出系統 4
2.1.1 系統架構 4
2.1.2 通道估計 6
2.2 非同調大量多輸入多輸出系統 6
2.2.1 系統架構 7
2.2.2 大量多輸入多輸出的相差16-APSK 7
2.2.3 用於大量多輸入多輸出的相差16-QAM檢測 9
2.3 回顧論文[14]之建表演算法 11
2.3.1 針對(2.24)式建表 14
2.3.2 針對(2.33)式建表 15
2.3.3 (2.24)式和(2.33)式偵測器的討論與模擬比較 17
2.3.4 針對(2.35)式建表以及模擬結果 18
第三章 各種星座圖的相差檢測 21
3.1 用於非同調大量多輸入多輸出系統之相差編碼 21
3.1.1 針對(2.24)式建表 21
3.1.2 針對(2.33)式建表 23
3.1.3 (2.24)式和(2.33)式偵測器的討論與模擬比較 24
3.1.4 針對(2.35)式建表以及模擬結果 29
3.2 16APSK內外圈點數不同 33
第四章 用於同調大量多輸入多輸出系統之相差編碼 39
4.1 大量多輸入多輸出多使用者的同調檢測 39
4.2 用於同調大量多輸入多輸出系統之相差編碼 40
4.2.1 正交前導序列的設計 40
4.2.2 模擬結果 43
第五章 多使用者偵測大量多輸入多輸出系統 46
5.1 回顧論文[19]三符元檢測 46
5.2 雙向中繼網路 47
5.2.1 架構一 49
5.2.2 架構二 49
5.3 模擬結果與分析 50
第六章 結論 58
參考文獻 59
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[4]. L. Lu, G. Y. Li, A. L. Swindlehurst, A. Ashikhmin and R. Rhang, ‘‘An overview of massive MIMO: Benefits and challenges,’’ IEEE J. Sel. Topics Signal Process., vol. 8, no. 5, pp. 742-758, Oct. 2014.
[5]. M. Shafi et al., “5G: A tutorial overview of standards, trials, challenges, deployment and practice,” IEEE J. Sel. Areas Commun., vol. 35, no. 6, pp. 1201-1220, Jun. 2017.
[6]. M Chowdhury, A. Manolakos and A. Goldsmith, ‘‘Scaling laws for noncoherent energy-based communications in the SIMO MAC,’’ IEEE Trans. Inform. Theory, vol. 62, no. 4, pp. 1980-1992, Apr. 2016.
[7]. A. G. Armada and L. Hanzo, ‘‘A non-coherent multi-user large scale SIMO system relaying on M-ary DPSK,’’ in Proc. ICC, 2015.
[8]. A. Schenk and R. F. H. Fischer, ‘‘Noncoherent detection in massive MIMO systems,’’ in Proc. WSA, 2013.
[9]. G. Yammine and R. F. H. Fischer, ‘‘Soft-decision decoding in noncoherent massive MIMO systems,’’ in Proc. WSA, 2016.
[10]. Z. Fang, F. Liang, J. Li and Y. Wang, ‘‘Multiuser differential transmission scheme fot massive MIMO systems,’’ Electronics Letters, vol. 52, no. 17, pp. 1451-1453, Aug. 2016.
[11]. D. Kong, X. G. Xia and T. Jiang, ‘‘A differential QAM detection in uplink massive MIMO systems,’’IEEE Trans. Wireless Commun., vol. 15, no. 9, pp. 6371-6382, Sep. 2016.
[12]. R. Y. Wei and X. J. Wang, “Differential 16-QAM and 16-APSK for uplink massive MIMO systems,’’ IEEE Wireless Communications Letters, vol. 7, no. 2, pp. 170-173, Apr. 2018
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modulation,” IEEE Trans. Commun., vol. 59, pp. 84-94, Jan. 2011.
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[16]. D. Liang, S. X. Ng and L. Hanzo, “Soft-decision star-QAM aided BICMID” IEEE Signal Proc. Lett., vol. 18, no. 3, pp. 169-172 Mar. 2011.
[17]. R. Y. Wei, W. Y. Hsu and J. A. Ritcey, “Differential encoding of 16APSK for BICM-ID,” in Proc. Asia-Pacific Conference on Communications (APCC), Kyoto, Japan, Oct. 2015.
[18]. R. G. Egri and F. A. Horrigan, “A finite group of complex integers and its application to differentially coherent detection of QAM signals,” IEEE Trans. Inform. Theory, vol. 40, no. 1, pp. 216-219, Jan. 1994.
[19]. Y. C. Li, “Differential network coding at the physical layer for two-way wireless
communications,” Master Thesis, National Central University, 2016.
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