相差位元交錯編碼之16QAM

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姓名

沈宥樂(Yu-Le Shen) 查詢紙本館藏

畢業系所

通訊工程學系

論文名稱

相差位元交錯編碼之16QAM
(Differential Bit-Interleaved Coded 16QAM)

相關論文

★ 具有快速改變載波相位之籬柵編碼MPSK 的非同調解碼	★ 用於非同調解碼之多層次編碼調變
★ 么正空間時間籬柵碼之解碼演算法	★ 由多層次編碼所架構之非同調碼
★ 用於非同調檢測之與空時區塊碼連結的區塊編碼調變	★ 用於正交分頻多工系統具延遲處理器的空時碼
★ 用於非同調區塊編碼MPSK之A*解碼演算法	★ 在塊狀衰退通道上的籬柵么正空時調變
★ 用於非同調區塊編碼MPSK之Chase演算法	★ 使用決定回授檢測之相差空時調變的一種趨近同調特性
★ 具延遲處理器的空時碼之軟式輸入輸出遞迴解碼	★ 用於非同調區塊編碼MPSK的最大可能性解碼演算法
★ 具頻寬效益之非同調調變	★ 非同調空時渦輪碼
★ 循環字首及補零正交分頻多工系統經預編碼後之頻譜比較	★ 循環字首及補零正交分頻多工系統在時序同步上之效能比較

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摘要(中)

位元交錯編碼調變是一個適合連續衰退通道的通道碼。在不完美的通道狀態資訊下，需要傳送前導符元做通道估測。當通道變化速度越快，前導符元須傳送較頻繁，所導致的速率損失也越大。所以在這篇論文裡我們使用16QAM調變，並串接位元交錯編碼調變與使用查表的相差編碼，接收端用非同調檢測，避免傳送前導符元速率損失的問題。模擬結果顯示，串接遞迴解碼的位元交錯編碼調變與使用查表的相差編碼，其錯誤率會比使用前導符元做通道估測的同調位元交錯編碼調變還要更好。

摘要(英)

Bit-interleaved coded modulation is a channel code that is suitable for continuous fading channel.To obtain channel state information,the transmitter periodically inserts pilot symbols to offer the receiver the ability to estimate channel amplitude and phase reference.When channel varies faster,the frequency of inserts pilot symbols should be higher,then it causes the rate loss.In this paper,we combine bit-interleaved coded modulation with differential encoding by a look-up table and use 16QAM modulation.At the receiver,we use noncoherent detector to avoid the rate loss.Simulation results show that combined bit-interleaved coded modulation and iterative decoding with differential encoding by a look-up table has better error performance than inserted pilot symbols with coherent detector.

關鍵字(中)

★ 位元交錯編碼
★ 16QAM
★ 非同調
★ 相差編碼
★ 查詢表

關鍵字(英)

★ BICM
★ 16QAM
★ noncoherent
★ differential encoding
★ look-up table

論文目次

摘要 I
Abstract II
致謝 III
第一章緒論 1
1.1 研究動機 1
1.2 內容介紹 2
1.3 通道模型 4
第二章回顧位元交錯編碼調變和使用查表的相差編碼 5
2.1 回顧位元交錯編碼調變 5
2.2 回顧使用查表的相差編碼 7
2.2.1 兩符號相差檢測 8
2.2.2 查表法精神與例子 9
2.2.3 查表法之演算法 10
2.2.4 建立16QAM的相差編碼表 12
2.2.5 使用查表的相差編碼可被描述成籬柵相差編碼 17
2.2.6 狀態數量縮減定理 18
第三章位元交錯編碼調變串接使用查表的相差編碼 21
3.1 系統分析 21
3.1.1 軟式輸出 21
3.1.2 硬式輸出 22
3.2 模擬結果 23
3.2.1 軟式輸出和硬式輸出 23
3.2.2 使用前導符元做通道估測的同調位元交錯編碼調變 25
3.2.3 APSK 30
3.2.4 不同觀察區間長度的模擬結果 31
3.2.5 降低複雜度 32
第四章交錯編碼調變使用遞迴解碼 34
4.1 硬式決策迴授 34
4.2 模擬結果 34
第五章結論 41
參考文獻 42

參考文獻

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指導教授

魏瑞益(Ruey-Yi Wei)

審核日期

2013-8-8

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