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研究生:劉君彥
研究生(外文):Chun-YenLiu
論文名稱:在多細胞多用戶的蜂巢式系統下行鏈路中具多對一天線的分散式資源分配技術
論文名稱(外文):Distributed Resource Allocation for the Downlink of Multi-user Multi-cell MISO Cellular System
指導教授:蘇賜麟
指導教授(外文):Szu-Lin Su
學位類別:碩士
校院名稱:國立成功大學
系所名稱:電腦與通信工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2012
畢業學年度:100
語文別:中文
論文頁數:61
中文關鍵詞:分散式系統多對一天線
外文關鍵詞:Distributed SystemMISO(Multi Input Multi Output)
相關次數:
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  • 點閱點閱:254
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  • 下載下載:3
  • 收藏至我的研究室書目清單書目收藏:0
在OFDMA系統下,為了提高頻譜使用效率(spectrum efficiency),系統資源分配機制盡可能重複使用OFDMA的每一個子載波,亦即同一個子載波有可能會被多個細胞以及多個用戶使用到。這些情況會造成使用同一個子載波的用戶互相干擾,要如何有效降低相互干擾效應以提高系統通訊量並達到公平原則是本論文非常重要的議題之一。

本論文探討多細胞多用戶蜂巢式系統的下行鏈路中基地台與行動用戶間具多對一天線(multi input single output)架構的有效降低用戶間干擾的技術。在此系統中本研究強調基地台的分散式(distributed)運作,亦即基地台間可以不用交換任何資訊(減少overhead)。

另外,在多細胞多用戶的環境,細胞邊緣(cell edge)用戶的訊息容量(capacity)會因為干擾較嚴重而降低很多,因此本論文在分散式系統下並提出功率控制以及用戶篩選的方法以有效提升細胞邊緣用戶的訊息容量以及提升整體用戶的公平性。

In order to increase spectrum efficiency, the resource allocation mechanism of OFDMA system reuses every subcarrier to the best of its ability, which means the same subcarrier would be applied to multi-cell and multi-user. The situations will cause the interferences between the users which were using the same subcarrier. To decrease the interferences effectively is one of the important issues in the thesis.

A technology with MISO(multi input single output) to decrease the interferences between users effectively in multi-cell multi-user downlink system had been proposed in the thesis. The system emphasizes how the distributed operations work at the base stations, which means there are no information exchanges between the base stations.

Since under multi-cell and multi-user environment, the capacity of cell-edged users reduce conspicuously because of the interferences. Hence, the thesis proposed the idea of power control and user selection under distributed system to increase the information capacity of cell-edged users and to elevate the fairness of the users’ information capacity.

摘要 i
Abstract ii
致謝 iii
目錄 v
表目錄 vii
圖目錄 viii
第一章 1
1.1研究背景與動機 1
1.2 論文章節組織 3
第二章 4
2.1 新世代通訊系統的發展 4
2.2 智慧型資源分配技術 9
2.2.1 頻率重複使用(fractional frequency reuse, FFR) 12
2.2.2中繼站台(In-Channel Relay) 16
2.2.3毫微細胞(Femtocell) 16
2.2.4 Higher Order MIMO及Beam-Steering 18
2.2.5 分散式天線(Distributed Antenna) 18
第三章 20
3.1 系統假設 20
3.2 無線通道介紹(Erceg Model) 22
第四章 24
4.1 分散式預編碼(Distributed procoding method) 24
4.1.1 SLNR-Based Precoding 25
4.1.2 SLNR-Based 與其他方法比較(引用文獻) 27
4.1.3 SLNR-Based optimal case 28
4.2 功率控制(Power Control) 30
4.2.1 功率控制方法 30
4.2.2 上下界設定(Setting The Upper Bound and Lower Bound) 31
4.3 用戶篩選(User Selection) 32
4.3.1 用戶篩選方法 32
4.3.2 不同篩選機率的方案 36
第五章 38
5.1 參數設定 38
5.2 模擬結果與討論 40
第六章 56
參考文獻 57

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