系統識別號 | U0002-2707201123400900 |
---|---|
DOI | 10.6846/TKU.2011.00990 |
論文名稱(中文) | 具不完美通道狀態資訊的放大前送中繼通訊系統 |
論文名稱(英文) | Amplify-and-Forward Relay Communication Systems with Imperfect Channel State Information |
第三語言論文名稱 | |
校院名稱 | 淡江大學 |
系所名稱(中文) | 電機工程學系碩士班 |
系所名稱(英文) | Department of Electrical and Computer Engineering |
外國學位學校名稱 | |
外國學位學院名稱 | |
外國學位研究所名稱 | |
學年度 | 99 |
學期 | 2 |
出版年 | 100 |
研究生(中文) | 林大洲 |
研究生(英文) | Ta-Chou Lin |
學號 | 698440046 |
學位類別 | 碩士 |
語言別 | 繁體中文 |
第二語言別 | 英文 |
口試日期 | 2011-07-05 |
論文頁數 | 36頁 |
口試委員 |
指導教授
-
易志孝(chyih@ee.tku.edu.tw)
委員 - 嚴雨田(059270@mail.tku.edu.tw) 委員 - 曾憲威(hwtseng@mail.dlit.edu.tw) |
關鍵字(中) |
通道估測 合作式通訊系統 中繼站傳輸 |
關鍵字(英) |
channel estimation cooperative communication systems relay-based transmission |
第三語言關鍵字 | |
學科別分類 | |
中文摘要 |
對於同調調變下放大前送中繼通訊系統,在目的地節點的接收機欲執行最大比例結合時,需要知道通道狀態資訊和所有分集鏈路的等效雜訊變異數。在本論文中,我們將設計一個線性最小均方誤差估計器來估測放大前送中繼網路中,由來源節點,經中繼節點,至目的地節點(source-relay-destination, SRD)鏈路的等效雜訊變異數。為了使中繼節點及目的地節點的估計工作能更方便執行,在來源節點的訊框中我們採用導航符號輔助調變結構。我們研究的結果顯示SRD鏈路的等效雜訊變異數之最小均方誤差並不必然會隨著訊雜比增加而降低。此外,SRD鏈路的等效雜訊變異數估計誤差將產生訊雜比不匹配的問題,而造成位元錯誤率的上升。 |
英文摘要 |
For amplify-and-forward (AF) relay communication systems with coherent modulation, the receiver at the destination node requires the channel state information and noise variances of all diversity links to perform maximal ratio combining. In this thesis, we design a linear minimum mean square error (LMMSE) estimator to estimate the equivalent noise variance of the source-relay-destination (SRD) link in AF relay networks. Pilot symbol assisted modulation is employed at the transmitter to facilitate the estimation task at the relay and destination nodes. Our results show the LMMSE of the noise variance of the SRD link dose not necessarily decrease as the signal-to-noise ratio (SNR) increases. Moreover, the estimation error of SRD link noise variance results in SNR mismatch problem which can degrade bit-error-rate performance of AF relay networks significantly. |
第三語言摘要 | 用増幅アンドフォワード(AF)コヒーレント変調による中継通信システム、宛先ノードの受信機は、最大比合成を実行するすべての多様性のリンクのチャネル状態情報とノイズの分散が必要です。この論文では、AFリレーネットワークで送信元中継先(SRD)リンクの等価雑音分散を推定する二乗誤差(LMMSE)推定量を意味する線形最小を設計。パイロットシンボルアシスト変調は、中継ノードと宛先ノードで、推定のタスクを容易にするために送信機で採用されている。我々の結果は、SRDのリンクの量の雑音分散のLMMSEが必ずしも信号対雑音比(SNR)が増加するにつれて減少しない示す。また、大幅にAFリレーネットワークのビット誤り率の性能を劣化させることができるSNRの不一致の問題のSRDのリンクの雑音分散の結果の推定誤差。 |
論文目次 |
目錄 目錄.....................................................III 圖目錄....................................................IV 一、緒論...................................................1 二、無線行動通道模型.......................................5 2.1固定至行動(fixed-to-mobile)的通道模型...................5 2.2行動至行動(mobile-to-mobile)的通道模型.................10 2.3模擬結果...............................................14 三、系統模型..............................................17 四、估計 的LMMSE估計器....................................23 五、數值結果..............................................28 六、結論..................................................34 七、參考文獻..............................................36 圖目錄 圖2.1、單環模型簡圖........................................6 圖2.2、雙環模型簡圖.......................................12 圖2.3、AoD和AoA之示意圖...................................12 圖2.4、模擬固定至行動通道模型的自相關函數圖...............15 圖2.5、模擬行動至行動通道模型的自相關函數圖...............16 圖3.1、單一中繼系統示意圖.................................17 圖3.2、來源端的傳輸訊框架構...............................19 圖3.3、中繼站的傳輸訊框架構...............................19 圖5.1、以導航符元輔助調變為基礎的퐴(푘)ℎ푟,푑(푘)線性最小均方誤 差估計器的效能.....................................31 圖5.2、在放大前送中繼網路中導航符元週期對系統誤碼率的影 響.................................................32 圖5.3、不完美通道狀態資訊下,放大前送中繼網路的誤碼 率.................................................33 |
參考文獻 |
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