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研究生:陳百立
研究生(外文):Pai-Li Chen
論文名稱:同步估測技術應用於歐規數位地面電視廣播接收機之實現與效能評估
論文名稱(外文):Implementation and Evaluation of Applying Synchronization Estimation Scheme in DVB-T Receiver
指導教授:林信標林信標引用關係
指導教授(外文):Hsin-Piao Lin
口試委員:詹英傑賴柏洲
口試日期:2007-06-28
學位類別:碩士
校院名稱:國立臺北科技大學
系所名稱:電子電腦與通訊產業研發碩士專班
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:2007
畢業學年度:95
語文別:中文
論文頁數:52
中文關鍵詞:歐規數位電視系統正交分頻多工同步最大相似估測法整體相關性估測法部分相似估測法時域下自相關估測法
外文關鍵詞:DVB-TOFDMSynchronizationMLECDPLDFPTC
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歐規數位電視系統所使用的傳輸架構為正交分頻多工(Orthogonal Frequency Division Multiplexing, OFDM),OFDM系統可以支援大量的資料傳輸,但是它對於同步(Synchronization)的要求卻更加嚴格。
本篇論文描述了三種同步的架構,包含了最大相似估測法(Maximum Likelihood Detection, ML)、整體相關性估測法(Ensemble Correlation Detection, ECD)和部分相似估測法(Part Likelihood Detection, PLD),將這三種演算法應用於DVB-T系統上評估其效能,改善接收機接收訊號時因為時間偏移(Timing Offset)和頻率偏移(Frequency Offset)所造成的誤差。
最後將傳統數位電視接收機的同步與通道估測演算法換成部分相似估測法與時域下自相關估測法(Frequency Domain Pilot Time Domain Correlation Method, FPTC)後,在固定接收的情況下效能增加了36.7%,時速40km/h接收的情況下效能增加了29.3%。
DVB-T employs Orthogonal Frequency Division Multiplexing (OFDM) as its modulation method. OFDM is known for its better transmission rate, however, it is quite strict with requirements of synchronization.
This paper describes, applies, and evaluates three different synchronization architectures for DVB-T system, including Maximum Likelihood Detection (ML), Ensemble Correlation Detection (ECD), and Part Likelihood Detection (PLD), which are used to reduce the BER performance at the receiving side due to timing offset and frequency offset.
Finally, after using PLD and Frequency Domain Pilot Time Domain Correlation Method(FPTC)to replace the conventional synchronization and channel estimation scheme of DVB-T receiver. The reception performance increases 30.7% and 29.3%, respectively, in fixed and 40km/hr cases.
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前言....................................................................................................1
1.2研究動機.............................................................................................2
1.3章節介紹.............................................................................................3
第二章 歐規數位電視系統..............................................................................4
2.1 OFDM簡介........................................................................................4
2.1.1 OFDM系統架構 ...................................................................5
2.2 DVB-T系統架構................................................................................8
2.3 DVB-T之OFDM系統參數..............................................................19
第三章 OFDM之同步...................................................................................24
3.1 OFDM之時間及頻率偏移................................................................24
3.1.1 時間偏移問題.......................................................................24
3.1.2 頻率偏移問題.......................................................................26
3.2最大相似估測法...............................................................................28
3.3整體相關性估測法...........................................................................30
3.4部分相似估測法...............................................................................31
3.5模擬結果..........................................................................................34
第四章 實現數位電視接收器......................................................................39
4.1 數位電視接收器架構......................................................................39
4.1.1 數位處理前端......................................................................40
4.1.2 訊號同步與通道估測...........................................................41
4.1.3 通道解碼..............................................................................42
4.2 實際應用同步架構與通道估測.......................................................43
4.3 實際接收訊號解調變對應星座圖比較............................................47
第五章 結論.................................................................................................49
參考文獻.........................................................................................................50
[1] M. S. Richer, G. Reitmeier, T. Gurley, G. A. Jones, J. Whitaker, and R. Rast, “The ATSC Digital Television System,” Proceedings of the IEEE, vol. 94, no. 1, pp. 37-43, January 2006.
[2] ETSI EN 300 744: Digital Video Broadcasting(DVB), “Framing structure, channel coding and modulation for digital terrestrial television,” vol. 5.1, November 2004.
[3] H. Asami and M. Sasaki, “Outline of ISDB Systems,” Proceedings of the IEEE, vol. 94, no. 1, pp. 248-250, January 2006.
[4] J. A. C. Bingham, “Multicarrier modulation for data transmission:an idea whose time has come,” IEEE Communication Magazine, vol. 28, no. 5, pp. 5-14, May 1990.
[5] ISO/IEC 13818-2: 2000 Information technology, ”Generic coding of moving pictures and associated audio information:Video,” cor. 1, March 2002.
[6] ISO/IEC 11172-3: 1993 Information technology, “Coding of moving pictures and associated audio for digital storage media at up to about 1.5 Mbit/s-Part 3:Audio,” cor 1, 1996.
[7] ISO/IEC 13818-1: 2000 Information technology, “Generic coding of moving pictures and associated audio information: Systems,” cor 2, December 2002.
[8] 曾建誠、陳常侃、王鵬華和丁建均譯,離散時間訊號處理, 台北:全華科技圖書股份有限公司,2004,第9-18 – 9-24頁。
[9] J. Louveaux, L. Vandendorpe, and T. Sartenaer, “Cyclic Prefixed Single Carrier and Multicarrier Transmission:Bit Rate Comparison,” IEEE Communications Letter, vol. 7, no. 4, April 2003.
[10] S. G. Kang, Y. M. Ha, and E. K. Joo, “A comparative Investigation on Channel Estimation Algorithms for OFDM in Mobile Communications,” IEEE Transactions on Broadcasting, vol. 49, no. 2, pp. 142-149, June 2003.
[11] G. S. Liu and C. H. Wei, “A New Variable Fractional Sample Delay Filter with Nonlinear Interpolation,” IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing, vol. 39, no. 2, pp. 123-126, Feburary 1992.
[12] X. Wang, Y. Wu, J. Y. Chouinard, S. Lu, and B. Caron, “A channel characterization technique using frequency domain pilot time domain correlation method for DVB-T systems,” IEEE Transactions on Consumer Electronics, vol. 49, no. 4, pp. 949-957, November 2003.
[13] 賴柏洲、林世欽,數位電視廣播技術與原理,台北:全華科技圖書股份有限公司,2004,第6-7 – 6-35頁。
[14] 鍾勝民,多功能里德所羅門編/解碼器之矽智產產生器,碩士論文,國立雲林科技大學電子與資訊工程研究所,雲林,2003。
[15] J. Jaap, M. Sandell, and P. O. Borjesson, “ML Estimation of Time and Frequency Offset in OFDM Systems,” IEEE Transactions on Signal Processing, vol. 45, no. 7, pp. 1800-1805, July 1997.
[16] K. Ramasubramanian and K. Baum, “An OFDM Timing Recovery Scheme with Inherent Delay-Spread Estimation,” IEEE Global Telecommunications Conference, vol. 5, pp. 3111-3115, November 2001.
[17] Z. Lu, Y. Wang, J. Ge, and B. Ai, “A Robust Timing and Frequency Synchronization Algorithm for DVB-H Receiver,” IEEE Transactions on Consumer Electronics, vol. 52, no. 2, pp. 341-346, May 1997.
[18] 蘇漢強,DVB-H基頻接收機之系統設計,碩士論文,國立臺灣大學電信工程學研究所,台北,2005。
[19] 王陽瑄,數位電視系統的同步與頻道估測知研讀,碩士論文,國立東華大學電機工程學系,花蓮,2006。
[20] 李卓澔,數位電視通道解碼及解調變之實作,碩士論文,國立台北科技大學資訊工程系所,台北,2006。
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