| 研究生: |
鄭如舫 Ju-Fang Cheng |
|---|---|
| 論文名稱: |
用於查表之相差編碼的訊號星座圖 Signal Constellations for Differential Encoding by a Look-Up Table |
| 指導教授: |
魏瑞益
Ruei-Yi Wei |
| 口試委員: | |
| 學位類別: |
碩士 Master |
| 系所名稱: |
資訊電機學院 - 通訊工程學系 Department of Communication Engineering |
| 論文出版年: | 2016 |
| 畢業學年度: | 104 |
| 語文別: | 中文 |
| 論文頁數: | 101 |
| 中文關鍵詞: | 訊號星座圖 、查表 、相差編碼 |
| 外文關鍵詞: | Signal Constellations, Look-Up Table, Differential Encoding |
| 相關次數: | 點閱:31 下載:0 |
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有一種新的相差編碼器被提出,它是藉由查表法所得到,且相差編碼若使用查表法可降低複雜度和有較好的錯誤效能,再者使其𝑁符號差分編碼表檢測最佳化。本篇論文以此一主題,針對各種𝑁來調整16QAM、16APSK及32APSK的星座圖,當我們調整星座圖的參數時,相對應會建立差分編碼表,而其中選擇的參數結果是具有最佳的最小非同調距離,調整後的星座圖最小非同調距離會大於原本星座圖,而其錯誤效能也在模擬結
果證實有較好表現。
A new differential encoder by a look-up table was proposed. Using a table for differential encoding has the advantages of both low complexity and good error performance. The table for N symbol differential detection was optimize as well. In this thesis, we modify the signal constellation of 16QAM , 16APSK and 32APSK for various values of N . The parameters of signal constellation are changed, and the corresponding differential encoding table is constructed.
The parameters which result in the best minimum noncoherent distance are selected. The minimum noncoherent distance of modified constellation is larger than that of the original constellation. The error performance of the modified
constellations are verified by computer simulations.
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[2] D. Warrier and U. Madhow, “Spectrally efficient noncoherent communication,”IEEE Trans. Inform. Theory, vol. 48, pp. 651-668, Mar. 2002.
[3] R. Y. Wei,“Differential encoding by a look-up table for quadrature-amplitude modulation,” IEEE Trans. Commun., vol. 59, pp. 84-94, Jan. 2011.
[4] R. Y. Wei,“Further Results on Differential Encoding by a Table,” IEEE Trans. Commun., June. 2012.
[5] 魏秀如, ”用於多重符號相差檢測之使用查表相差編碼,” 國立中央大學通訊工程研究所,碩士論文, 七月. 2011.
[6] 黃俞豪, ”多重符號相差編碼,” 國立中央大學通訊工程研究所,碩士論文, 七月. 2012.