臺灣博碩士論文加值系統

在無線通訊系統發展快速的背景下，設備傳輸的速率與品質的要求越來越高，錯誤更正碼可以改正傳輸中造成的錯誤，提高資料的正確性。在無線通訊環境中，傳輸通道中存在著多重路徑造成的訊號衰減，在訊號衰減的環境下可以透過多天線系統以減少傳輸時訊號衰減造成的訊號錯誤，改善多路徑造成的位元錯誤率。本論文提出一種可應用於長期演進技術升級版，使用兩根傳輸天線與三個時槽之多階層時空區段碼，以達到多輸入多輸出之無線傳輸系統中高傳輸速率的需求。這項新技術利用時空區段碼傳輸矩陣之集合分割，並以BCH碼作為多階層編碼，在通訊品質效率上得到全速率傳輸、低錯誤率的改善。

In digital transmission, the technical of error control coding can improve the error rate. In recent years, multiple-input multiple output (MIMO) schemes can be used to over the problem of multipath fading in wireless communication environments. In this thesis, we proposed a multilevel space-time block code with two transmit antennas and three time slots which can be applied to LTE-A frame structure. A transmission system which can achieve high transmission rate requirements in the MIMO. This new structure is designed by multilevel space-time block code and BCH code. The simulation results show that this new structure can achieve full rate transmission and outstanding error performance.

中文摘要 i
英文摘要 ii
誌謝 iii
目錄 iv
表目錄 vi
圖目錄 vii
第一章 緒論 1
1.1研究動機 1
1.2文獻探討 1
1.3論文架構 2
第二章 多階層區段編碼調變 3
2.1 編碼調變 3
2.2 區段編碼 4
2.3 訊號集合分割 4
2.4 硬式決策與軟式決策解碼 7
2.5 維特比演算法 8
2.6 多階層區段碼架構 9
2.6.1 多階層區段編碼調變 10
2.6.2 多階層區段編碼調變解碼 11
第三章 時空區段碼之傳輸架構 13
3.1 時空區段碼 13
3.1.1 簡介 13
3.1.2 時空區段碼之傳輸架構 14
3.1.3 時空區段碼之傳輸矩陣 15
3.1.4 時空區段碼之解碼 16
3.1.5 二傳一收天線之傳輸架構 18
3.2 Novel時空區段碼 20
3.2.1 簡介 20
3.2.2 系統架構模型 21
3.2.3 傳輸矩陣 21
3.2.4最小行列式值 23
3.2.5 解碼 24
第四章 BCH多階層時空區段碼 26
4.1 最小編碼增益距離 26
4.2 多階層時空區段碼架構 27
4.3 七階層時空區段編碼 29
4.4 MMV-S4系統架構 33
4.5 BCH多階層時空區段碼 36
4.5.1 BCH碼簡介 36
4.5.2 BCH多階層時空區段碼系統架構 37
4.6模擬結果 40
第五章 結論 41
參考文獻 42

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