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研究生:蔣宗翰
研究生(外文):Zong-Han Jiang
論文名稱:多輸入多輸出系統下傳送波束形成技術之研究
論文名稱(外文):Study of Transmit Beamforming Methods for MIMO Systems.
指導教授:王瑞騰
指導教授(外文):Jui-Teng Wang
口試委員:麥毅廷陳松雄王瑞騰
口試委員(外文):Yi-Ting MaiSong-Shyong ChenJui-Teng Wang
口試日期:民國100年6月23日
學位類別:碩士
校院名稱:國立暨南國際大學
系所名稱:通訊工程研究所
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:2011
畢業學年度:99
語文別:中文
論文頁數:41
中文關鍵詞:多輸入多輸出系統傳送波束形成最大範數結合複雜度
外文關鍵詞:Multiple Input Multiple Output(MIMO)Transmit BeamformingMaximum Norm Combining(MNC)Complexity
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在本論文中,我們在多輸入多輸出(multiple-input multiple-output, MIMO)系統下於傳送端使用傳送波束形成(Transmit Beamforming)技術,在相同環境下探討四種權重決定演算法:奇異值分解(Singular Value Decomposition,SVD)、最大範數結合(Maximum Norm Combining,MNC)、最大比率傳送(Maximum Ration Transmit, MRT)以及改良最大比例傳送(Improved Maximum Ration Transmit, IMRT)的系統效能,模擬並探討四者的在不同天線數下的系統效能與複雜度。
我們透過在雷利衰減通道(Rayleigh fading channel)下做系統模擬,並比較四種權重決定法在相同訊雜比(Signal to Noise Ratio, SNR)下的位元錯誤率(Bit Error Rate,BER)。在傳送端天線數量低的情況下,四種演算法的系統效能相當接近,但是MRT需要考慮接收端天線數,雖然複雜度低,隨著接收天線數上升效能會下降,而在天線數量多的情況下,在系統效能及複雜度間的取捨中選擇MNC會比SVD好。
We study the transmit Beamforming technique for MIMO system in this thesis, and discuss the system performance and complexity of these three different weight algorithms:Singular Value Decomposition(SVD) , Maximum Norm Combining(MNC), Maximum Ration Transmit(MRT), and Improved Maximum Ration Transmit(IMRT).
We simulate the system performance over Rayleigh fading channel, and compare these algorithms bit error rate(BER) at the same signal to noise ratio(SNR). In the case which the number of transmit antenna is small, four kinds of algorithms for performance is very close, and the complexity of the MRT algorithm is very low, but performance is reduced when the number of receiver antenna increase. The MNC method compares with SVD method that offers a good tradeoff between complexity and performance when the transmit antenna is increase.
摘要 .................................................................................................................................. I
Abstract ............................................................................................................................ II
目錄 ............................................................................................................................... III
圖目錄 ............................................................................................................................. V
表目錄 ............................................................................................................................ VI
第一章 緒論 ............................................................................................................... 1
1.1 前言 ..................................................................................................................... 1
1.2 研究目的與動機 ................................................................................................. 1
1.3 論文架構 ............................................................................................................. 3
第二章 系統架構與文獻探討 .................................................................................... 4
2.1多輸入多輸出系統簡介 ...................................................................................... 4
2.2多輸出多輸入系統架構 ...................................................................................... 5
2.3分集技術 ............................................................................................................. 6
2.4合併技術 ............................................................................................................. 7
2.5無線傳輸通道 ..................................................................................................... 8
2.6傳送波束形成簡介 ............................................................................................ 10
2.7 MIMO系統下傳送波束形成之架構 ................................................................ 12
2.8文獻探討 ........................................................................................................... 14
2.8.1奇異值分解演算法 ................................................................................. 14
2.8.2最大範數結合演算法 ............................................................................. 16
2.8.3最大比例傳送權重演算法...................................................................... 17
第三章 傳送波束形成演算法數學模型 ................................................................... 19
3.1奇異值分解演算法 ............................................................................................ 19
3.2最大範數結合權重演算法 ................................................................................ 21
3.3最大比例傳送權重演算法 ................................................................................ 27
第四章 模擬結果與分析 .......................................................................................... 29
4.1 模擬參數與模擬結果 ....................................................................................... 29
4.2 複雜度分析 ...................................................................................................... 35
第五章 結論 ............................................................................................................. 39
參考文獻 ........................................................................................................................ 40
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