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姓名 王信傑(Xin-Jie Wang) 查詢紙本館藏 畢業系所 通訊工程學系 論文名稱 用於上行大量多輸入多輸出系統的相差調變
(Differential Modulation in Uplink Massive MIMO Systems)相關論文 檔案 [Endnote RIS 格式]
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摘要(中) 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。
在本篇論文中,我們指出此相差QAM方法的一些問題並解決這些問題,我們為了16-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。
除此之外,我們提出了一個用於使用前導序列的同調大量多輸入多輸出系統的方法,此方法利用傳送過的資料訊號作為前導序列,並設計相互正交的前導序列,可使傳送前導序列的時間縮短。摘要(英)
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 this letter, we raise and try to resolve some questions about this differential QAM scheme. We construct new tables for differentially encoded 16-QAM. We 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.
Besides, we propose a new scheme for uplink coherent massive MIMO. This scheme uses transmitted data signal as pilot sequences, and we also design the pilot sequences to make it orthogonal to each other, which can shorten the time of transmission of the pilot sequence.關鍵字(中) ★ 大量多輸入多輸出
★ 相差檢測
★ 相差編碼
★ 正交振幅調變
★ 振幅相位鍵移關鍵字(英) ★ massive MIMO
★ differential detection
★ differential encoding
★ QAM
★ APSK論文目次
論文摘要 I
Abstract II
目錄 III
圖目錄 V
表目錄 VI
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
2.1.3 前導訊號汙染 7
2.2 非同調大量多輸入多輸出系統 8
2.2.1 系統架構 8
2.2.2 大量多輸入多輸出的相差16-APSK 8
2.2.3 用於大量多輸入多輸出的相差16-QAM檢測 10
2.2.4 模擬結果 17
第三章 新提出的相差檢測法 19
3.1 回顧論文[8]之建表演算法 19
3.2 用於非同調大量多輸入多輸出系統之相差編碼 22
3.2.1 針對(2.32)式建表 22
3.2.2 針對(3.9)式建表 23
3.2.3 (2.32)式和(3.9)式偵測器的討論與模擬比較 25
3.2.4 針對(3.11)式建表以及模擬結果 30
第四章 用於同調大量多輸入多輸出系統之相差編碼 36
4.1 大量多輸入多輸出多使用者的同調檢測 36
4.2 用於同調大量多輸入多輸出系統之相差編碼 37
4.2.1 正交前導序列的設計 37
4.2.2 模擬結果 40
第五章 結論 43
參考文獻 44參考文獻
[1] 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.
[2] 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.
[3] 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.
[4] 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.
[5] 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.
[6] W. Weber, III “Differential encoding for multiple amplitude and phase shift keying systems,” IEEE Trans. Commun., vol. 26, pp. 385-391, Mar. 1978.
[7] D. Warrier and U. Madhow, “Spectrally efficient noncoherent communication,” IEEE Trans. Inform. Theory, vol. 48, pp. 651-668, Mar. 2002.
[8] R. Y. Wei, “Differential encoding by a look-up table for quadrature amplitude modulation,” IEEE Trans. Commun., vol. 59, pp. 84-94, Jan. 2011.
[9] R. Y. Wei and L. T. Chen, “Further results on differential encoding by a table,” IEEE Trans. Commun., vol. 60, pp. 2580-2590, Sep. 2012.
[10] T. L. Marzetta, “Noncooperative cellular wireless with unlimited numbers of base station antennas,” IEEE Trans. Wireless Commun., vol. 9, no. 11, pp. 3590-3600, Nov. 2010.指導教授 魏瑞益(Ruey-Yi Wei) 審核日期 2017-7-25 推文 plurk
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