臺灣博碩士論文加值系統

近幾年來無線系統傳輸的分集已經廣泛的被研究，多階層空時區段碼的技術已是根據編碼増益距離的討論，再結合多階層信號集合分割的概念及空時區段碼。我們在多階層空時區段碼的系統加入里德所羅門碼作為聯結外部碼。模擬結果顯示我們所提出聯結碼系統，可以達到很好的位元錯誤率與低解碼複雜度。

Over past several years, transmit diversity has been studied extensively to provide error performance for wireless systems. A novel technique for constructing multilevel space-time code is proposed. For a given orthogonal space-time block code, several component codes are combined in conjunction with set partitioning of the multidimensional signal constellation according to the coding gain distance criterion. Then, the associated scheme is further concatenated with an outer Reed-Solomon code. Simulation results show that the concatenated scheme can achieve excellent error performance with low decoding complexity.

目 錄

摘要 i
ABSTRACT ii
目 錄 iii
表目錄 v
圖目錄 vi
第一章 緒論 1
第二章 空時區段碼 2
2.1 空時區段碼介紹 2
2.2 空時區段碼傳輸模型 3
2.3 空時區段編碼與正交矩陣設計 5
2.3.1 實數正交空時區段碼方陣 5
2.3.2 一般化實數正交空時區段碼矩陣 7
2.3.3複數正交空時區段碼矩陣 8
2.4 空時區段碼解碼 10
第三章 多階層空時區段碼 13
3.1多階層區段編碼調變 13
3.1.1 距離概念(Distance Concepts) 14
3.1.2 信號集合分割(Signal Set Partition) 15
3.1.3 三階層區段編碼調變 16
3.1.4 多階層區段編碼調變解碼 17
3.2 多階層空時區段碼 20
3.2.1多階層空時區段碼介紹 20
3.2.2最小編碼增益距離的計算 22
3.2.3 多階層空時區段碼系統模擬 24
3.2.4 多階層空時區段碼系統解碼 26
3.3模擬結果 27
3.3.1 系統在穩定平坦衰落通道的模擬結果 27
3.3.2 系統在時間相關性瑞雷衰落通道的模擬結果 29
第四章 里德所羅門聯結多階層空時區段碼 32
4.1 聯結編碼調變(CCM)介紹 32
4.1.1 單階層聯結編碼調變 33
4.1.2 多階層聯結編碼調變 34
4.1.3 聯結編碼調變解碼 35
4.2 里德所羅門碼聯結多階層空時區段碼介紹 36
4.2.1 里德所羅門碼聯結多階層空時區段碼系統模擬 37
4.2.2 里德所羅門碼聯結多階層空時區段碼解碼 38
4.3 模擬結果 39
4.3.1系統在穩定平坦衰落通道的模擬結果 40
4.3.2系統在時間相關性瑞雷衰落通道的模擬結果 42
第五章 結論 46
參考文獻 47

參考文獻

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