用於上行大量多輸入多輸出系統的相差APSK&QAM

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潘聿銘(Yu-Ming Pan) 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APSK&QAM
(Differential APSK & QAM in Uplink Massive MIMO Systems)

相關論文

★ 具有快速改變載波相位之籬柵編碼MPSK 的非同調解碼	★ 用於非同調解碼之多層次編碼調變
★ 么正空間時間籬柵碼之解碼演算法	★ 由多層次編碼所架構之非同調碼
★ 用於非同調檢測之與空時區塊碼連結的區塊編碼調變	★ 用於正交分頻多工系統具延遲處理器的空時碼
★ 用於非同調區塊編碼MPSK之A*解碼演算法	★ 在塊狀衰退通道上的籬柵么正空時調變
★ 用於非同調區塊編碼MPSK之Chase演算法	★ 使用決定回授檢測之相差空時調變的一種趨近同調特性
★ 具延遲處理器的空時碼之軟式輸入輸出遞迴解碼	★ 用於非同調區塊編碼MPSK的最大可能性解碼演算法
★ 具頻寬效益之非同調調變	★ 非同調空時渦輪碼
★ 循環字首及補零正交分頻多工系統經預編碼後之頻譜比較	★ 循環字首及補零正交分頻多工系統在時序同步上之效能比較

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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。

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 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.

關鍵字(中)

★ 大量多輸入多輸出系統
★ 上行
★ APSK
★ QAM
★ 相差編碼

關鍵字(英)

論文目次

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

參考文獻

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指導教授

魏瑞益(Ruey. Yi. Wei)

審核日期

2018-10-12

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