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研究生:張孟良
研究生(外文):Meng-Liang Chang
論文名稱:應用於VDSL系統之最佳化功率分配
論文名稱(外文):Optimal Power Allocation for VDSL System
指導教授:林源倍
指導教授(外文):Yuan-Pei Lin
學位類別:碩士
校院名稱:國立交通大學
系所名稱:電機與控制工程系所
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:2004
畢業學年度:92
語文別:英文
論文頁數:60
中文關鍵詞:非常高速數位迴路功率分配
外文關鍵詞:VDSLpower allocation
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近來非常高速數位迴路(VDSL)系統應用於高速資料傳輸的發展上引起廣泛的興趣。VDSL系統使用具有非平的功率頻譜遮罩的多頻帶頻率分配。在這種情況下,傳統的water-filling功率分配可能不是最好的選擇。在本論文中,我們考慮一種最佳化的功率分配應用於具有非平的功率頻譜遮罩的離散多調(DMT)系統。我們可以看到,使用最佳化功率分配將比一般使用的功率分配達到較高的傳
輸速率。
Recently there has been great interest in the development of VDSL (very-high-bit-rate digital subscriber line) system for high speed data transmission systems. The VDSL system has multiband frequency plan with a non-flat power spectrum mask. In this case, the conventional water-filling power allocation may not be the best thing to do. In this thesis, we consider optimal power allocation for DMT (discrete multitone) systems with a non-flat power spectrum density mask. We will see that, the optimal power allocation will achieve higher data rate than the commonly used power allocation.
1 Introduction 1
1.1 Outline ........................................ 3
1.2 Notations ...................................... 3
2 DMT System Model 5
2.1 Loop Characeteristics .......................... 5
2.2 DMT System Model ............................... 7
3 DFT based VDSL System 11
3.1 VDSL System .................................... 11
3.2 Filterbank Representation of DFT based VDSL
Transmitter .................................... 14
4 Optimal Power Allocation 17
4.1 Water-filling Power Allocation ................. 18
4.2 Optimal Power Allocation Method ................ 19
5 Performance Evaluation 25
5.1 Simulation Result .............................. 25
5.2 Discussion ..................................... 26
5.3 Payload for Optimal Power Allocation ........... 28
6 Conclusion 48
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