研究生: |
黃博祥 |
---|---|
論文名稱: |
雷利衰減通道下針對訊號空間分集的最佳調變星座映射設計 Optimal Constellation Mapping for Signal Space Diversity in Rayleigh Fading Channels |
指導教授: | 蔡育仁 |
口試委員: |
溫志宏
黃政吉 |
學位類別: |
碩士 Master |
系所名稱: |
電機資訊學院 - 通訊工程研究所 Communications Engineering |
論文出版年: | 2012 |
畢業學年度: | 100 |
語文別: | 英文 |
論文頁數: | 54 |
中文關鍵詞: | 訊號空間分集 、映射最佳化 |
外文關鍵詞: | signal space diversity, rotation, constellation mapping |
相關次數: | 點閱:3 下載:0 |
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訊號空間分集是一項藉由旋轉星座點後再將實虛部做打散、重組的動作進而得到分集增益的技術。也由於打散及重組的動作,並且判定邊界會隨著通道效應而改變等因素,使得整個系統的符號錯誤率變成一個複雜的問題。然而我們從模擬觀察到一些現象,並從中分析出了一些性質:我們發現一般傳統中最佳的格雷映射在這個狀況下並非最佳的映射;另外兩個星座點之間的積距離大小決定了兩個星座點錯誤率。因此我們利用蒙地卡羅方法以及積距離這項性質,針對幾個符號錯誤率較低的角度,設計出一個能達到最低位元錯誤率的星座映射。
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