用於相位不確定性通道的非同調渦輪解碼

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謝旻倫(Min-lun Hsieh) 查詢紙本館藏

畢業系所

通訊工程學系

論文名稱

用於相位不確定性通道的非同調渦輪解碼
(Noncoherent Turbo Decoding for the Phase-Uncertain Channel)

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)

在1993年所提出的同調渦輪碼，因其優異的錯誤效能受到高度的重視，在許多通訊協定中也被採用。許多實際的帶通通信系統中，在資料可以被解碼之前，估計出載波相位是困難的。許多強大的演算法基於合併檢測和解碼策略已經被提出。本篇論文提出使用原始籬柵的改良式演算法，由模擬結果顯示在高訊雜比的情況之下，我們所提出的作法能有較佳的位元錯誤率。此外，本篇論文在渦輪編碼器前串接差分編碼器去避免非同調災難碼的產生。

摘要(英)

Turbo code was proposed in 1993 and has raised great attention for its good effectiveness, and thus it has been used widely in many communication protocols. In many practical bandpass communication systems, it is difficult that the carrier phase needs to be estimated before the data can be decoded. Some powerful algorithms based on combined detection and decoding strategy has been proposed. In this thesis, we propose a modified algorithm using the original trellis. The simulation result shows that at high SNR, the proposed approach has better bit error rate. In addition, we concatenate a differential encoder with a turbo encoder to avoid noncoherent catastrophic codes.

關鍵字(中)

★ 差分編碼器
★ 非同調檢測
★ 渦輪碼
★ 非同調災難碼

關鍵字(英)

★ turbo code
★ differential encoder
★ noncoherent catastrophic code
★ noncoherent detection

論文目次

摘要 ······································································· I
Abstract ··································································II
誌謝 ·····································································III
目錄 ····································································· V
圖目錄 ································································ VII
第一章緒論 ························································ 1
1.1 介紹 ···································································· 1
1.2 研究動機 ······························································ 1
1.3 通道模型 ······························································ 2
第二章相關文獻回顧 ············································ 4
2.1 同調渦輪碼 ··························································· 4
2.1.1 編碼器 ····································································· 4
2.1.2 解碼器 ····································································· 6
2.2 同調渦輪籬柵型編碼調變 ········································· 8
2.2.1 編碼器 ····································································· 8
2.2.2 解碼器 ···································································· 11
2.3 在AWGN通道的非同調重複渦輪解碼 ······················ 14
2.3.1 非同調BCJR演算法 ··················································15
2.3.2 非同調重複解碼 ························································17
2.4 用於相位不確定性通道的適應性重複檢測 ·················· 19
2.4.1 系統與通道模型 ························································19
2.4.2 用於相位不確定性通道的檢測策略 ································20
第三章使用原始籬柵之改良式演算法 ······················27
3.1 第Ⅰ種 ······························································· 28
3.2 第Ⅱ種 ······························································· 30
3.3 第Ⅲ種 ······························································· 35
第四章串接相差編碼器 ········································40
4.1 非同調災難碼 ······················································ 40
4.2 串接差分編碼器 ··················································· 42
第五章結論 ·······················································51
參考文獻 ·······························································52

參考文獻

[1]C. Berrou and A. Glavieux, “Near optimum error correcting coding and decoding: turbo-codes,” IEEE Trans. Commum., vol. 44, Oct. 1996, pp. 1261-1271.
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[4]P. Robertson and T. Worz, “Bandwidth-efficient turbo trellis-coded modulation using punctured component codes,” IEEE J. Select. Areas Commun., vol. 16, no. 2, Feb. 1998, pp. 206-218.
[5]G. Ungerboeck, “Channel coding with multilevel/phase signals,” IEEE Trans. Inform. Theory, vol. IT-28, Jan. 1982, pp. 55-56.
[6]Divsalar and M. K. Simon, “Multiple-symbol differential detection of MPSK,” IEEE Trans. Commun., vol. 38, pp. 300-308, Mar 1990.
[7]G. Colavolpe, G. Ferrari, and R. Raheli, “Noncoherent iterative (turbo) decoding,” IEEE Trans. Commun., vol.48, no. 9, pp. 1488-1498, 2000.
[8]G. Ferrari, A. Anastasopoulos, G. Colavolpe and R. Raheli, “Adaptive iterative detection for the phase-uncertain channel: limited-tree-detection versus truncated-memory detection,” IEEE Trans. Veh. Technol., vol. 53, no.2, Mar. 2004, pp. 433-442.
[9]Anastasopoulos and K. M. Chugg, “Adaptive iterative detection for phase tracking in turbo-coded systems,” IEEE Trans. Commun., vol. 49, no. 12, Dec. 2001, pp. 2135-2144.
[10]G. Colavolpe and R. Raheli, “Noncoherent sequence detection,” IEEE Trans. Commun., vol. 47, Sept. 1999, pp. 1376-1385.

指導教授

魏瑞益(Ruey-yi Wei)

審核日期

2010-7-26

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