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研究生:呂柏宣
研究生(外文):Bo-Shuan Lu
論文名稱:結合相差編碼與籬柵編碼調變的碼搜尋
論文名稱(外文):Code Searches for Trellis-Coded Modulation with Differential Encoding
指導教授:魏瑞益
指導教授(外文):Ruey-Yi Wei
學位類別:碩士
校院名稱:國立中央大學
系所名稱:通訊工程學系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2015
畢業學年度:103
語文別:中文
論文頁數:67
中文關鍵詞:相差編碼籬柵編碼調變非同調檢測碼搜尋
外文關鍵詞:Differential encodingTrellis-coded modulationNoncoherent detectionCode Searches
相關次數:
  • 被引用被引用:0
  • 點閱點閱:104
  • 評分評分:
  • 下載下載:9
  • 收藏至我的研究室書目清單書目收藏:0
相差編碼是一個在傳送端的傳統技術,其可在接收端有簡單的非同調檢測器。另一方面,籬柵編碼調變是一種提供可靠數據傳輸的頻寬效益技術。在本論文中,我們在通道相位同調N為2個符號的情況下考慮籬柵編碼調變加相差編碼。此外,在多位元相位偏移調變訊號下,我們提出一種由相差編碼擴展的新籬柵編碼調變,稱為相差籬柵編碼調變。相差籬柵編碼調變是一種籬柵編碼調變加相差編碼,其籬柵圖上的狀態被定義在不同的狀態下會有不同的相差編碼。最後,我們提出一種相差編碼設計方式來完成非同調非災難性的相差籬柵編碼調變。

對於籬柵編碼調變加相差編碼以及相差籬柵編碼調變兩者,我們提出增加距離量和使用集合分割。此外,本論文將會分析集合分割、設計或搜尋到的籬柵碼以及它們的最小距離。在碼率為每一符號為2位元的情況下,我們皆找到對於籬柵編碼調變加相差編碼以及相差籬柵編碼調變兩者,比原始碼更好的新碼,其也具有較好的錯誤率。另外在碼率為每一符號為3位元的情況下,相差籬柵編碼調變使用十六位元振幅相位偏移調變會比十六位元相位偏移調變的相差籬柵編碼調變以及籬柵編碼調變加相差編碼兩者皆有更大的最小距離和更好的錯誤率。

Differential encoding (DE) is a classical technique at the transmitter that allows simple noncoherent detection at the receiver. On the other hand, Trellis-coded modulation (TCM) is a bandwidth efficient technique which offers reliable data transmission. In this paper, we consider TCM with DE for channel phase coherence over N = 2 symbols. Besides the well-known TCM followed by DE (called TCM-DE) for MPSK signals, we propose a new trellis coding extension of DE, called differential trellis coded modulation (DTCM). DTCM is TCM with DE defined in states where distinct states may have distinct DE functions. We propose design methods of DE functions for noncoherently non-catastrophic DTCM.

For both TCM-DE using MPSK signals and DTCM, we propose additive distance measures and set partitioning. Based on the proposed set partitioning, trellis codes are designed or searched and their minimum distances are analyzed. For data rate 2 bits/symbol, the obtained new codes outperform the original codes for both TCM-DE and DTCM, and the new codes of TCM-DE and DTCM have similar bit error rate. For data rate 3 bits/symbol, DTCM using 16APSK (amplitude phase-shift keying) has better minimum distance and BER than both TCM-DE and DTCM using 16PSK.
摘要..................................................I
Abstract.............................................II
誌謝.................................................III
目錄..................................................VI
圖表目錄.............................................VIII
第一章 緒論...........................................1
第二章 回顧相差籬柵編碼調變.............................3
第三章 相差籬柵編碼調變的碼搜尋........................16
第四章 籬柵編碼調變加相差編碼的碼搜尋...................34
第五章 結論..........................................50
參考文獻...............................................51

[1] R. Y. Wei and J. A. Ritcey, “Differential trellis coded modulation with state dependent mappings,”Asilomar Conference on Signals, Systems, and Computers, CA, USA, Nov. 2014.
[2] G. Ungerboeck, “Channel coding with multilevel/phase signals,” IEEE Trans. Inform. Theory, vol. 28, pp. 55-67, Jan. 1982.
[3] G. Ungerboeck, “Trellis-coded modulation with redundant signal sets-Part I: Introduction,” IEEE Commun. Mag., vo1. 25, no. 2, pp. 5-11, Feb. 1987.
[4] G. Ungerboeck, “Trellis-coded modulation with redundant signal sets-Part II: State of the art,” IEEE Commun. Mag., vo1. 25, no. 2, pp. 12-21, Feb. 1987.
[5] R. Y. Wei, “Differential encoding by a look-up table for quadrature-amplitude modulation,” IEEE Trans. Commun., vol. 59,pp. 84-94, Jan. 2011.
[6] R. Y. Wei, S. S. Gu and T. C. Sue, “Noncoherent block-coded TAPSK,” IEEE Trans. Commun., vol. 57, pp 3195-3198, Nov. 2009.
[7] C. Berrou and A. Glavieux, “Near optimum error correcting coding and decoding: Turbo-codes,” IEEE Trans. Commun., vol. 44, no. 10, pp. 1261-1271, Oct. 1996.
[8] R. Y. Wei and C. C. Huang, “Noncoherently non-catastrophic trellis coded modulation,” IEEE Trans. Commun. vol. 59, no. 2, pp. 369-375, Feb. 2011.
[9] R. Y. Wei and C. C. Huang, “Bandwidth-efficient noncoherent trellis-coded MPSK,” IEEE Trans. Commun., vol. 57, no. 10, pp. 2853-2856, Oct. 2009.
[10] G. Colavolpe, G. Ferrari, and R. Raheli, “Noncoherent iterative (turbo) detection,” IEEE Trans. Commun., vol. 48, no. 9, pp. 1488-1498, Sep. 2000.


[11] R. Y. Wei, “Differential encoding by a look-up table for quadrature-amplitude modulation,” IEEE Trans. Commun., vol. 59, pp. 84-94, Jan. 2011.
[12] M. K. Simon and D. Divsalar, “The performance of trellis-coded multilevel DPSK on a fading mobile satellite channel,” IEEE Trans. Veh. Tech., vol. 37, pp. 78-91, May 1988.
[13] G. Colavolpe and R. Raheli, “On noncoherent sequence detection of coded QAM,” IEEE Commun. Lett., vol. 2, pp. 211-213, Aug. 1998.
[14] G. Colavolpe and R. Raheli, “Noncoherent sequence detection,” IEEE Trans. Commun., vol. 47, pp. 1376-1385, Sept.1999.
[15] D. Divsalar, M. K. Simon and M. Shahshahani, “The performance of trellis-coded MDPSK with multiple symbol detection,” IEEE Trans. Commun., vol. 38, pp. 1391-1403, Sept. 1990.

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