成功大學博碩士論文系統

簡易檢索 / 詳目顯示

回結果列表

研究生：	王宏仁 Wang, Hung-Ren
論文名稱：	電力線通道的週期性行為與其對通訊系統設計的影響 Cyclic Behavior of Power-Line Channels and Its Effect on Communication System Design
指導教授：	蘇賜麟 Su, Szu-Lin
學位類別：	碩士 Master
系所名稱：	電機資訊學院 - 電腦與通信工程研究所 Institute of Computer & Communication Engineering
論文出版年：	2006
畢業學年度：	94
語文別：	英文
論文頁數：	51
中文關鍵詞：	適應性調變、多頻正交多工、電力線通訊
外文關鍵詞：	Adaptive modulation, OFDM, Power-line communications
相關次數：	點閱：104 下載：0
分享至:	分享至facebook 分享至twitter

查詢本校圖書館目錄查詢臺灣博碩士論文知識加值系統勘誤回報

電力線通訊近來漸漸走入人們的生活中，在歐美地區尤其明顯，電力線通訊有著許多先天上的優點，如在家中早已佈置好的電力線網路與可使裝置同時取得電源與連上網路，但電力線本來是為傳遞電力而設計的，欲在其上傳輸高頻的通訊資料，必須對抗其嚴重的衰減與多路徑干擾、時變的阻抗與通道。
近年來，研究電力線通訊主要有兩個組織，一個是歐洲系統的組織，主要是根據CENELEC standard EN 50065 的標準，另一個是美洲的組織，HomePlug Powerline Alliance，先前在2001 年發表的HomePlug 1.0.1 Specification 傳輸速率只達13Mbps，但在2005 年發表的HomePlug AV 傳輸速率可達到150Mbps，這更讓電力線通訊成為一個傳送影音/資料的良好媒介。
本論文著重於電力線通道週期性行為的探討，由實際量測的結果加以驗證，與傳統的非時變通道模型比較，週期性的通道行為更接近真實的電力線通道，由此出發，研究其對通訊系統設計的影響，提出一個同時考慮在時域與頻域上最佳化傳輸率的適應性調變技術。

Recently, power-line communications (PLC) has become more accessible to people especially in America and Europe. PLC has some inherent advantages, such as the wide availability of outlets and the delivery of both power and information to devices. However, PLC has to combat with serious attenuation, multipath effects, time-variant impedance and channels because power lines are not initially devised for communication purposes.
There are mainly two organizations researching on PLC. One is in Europe following CENELEC standard EN 50065, and the other is HomePlug Powerline Alliance (HPA) in America. HPA released HomePlug 1.0.1 Specification in 2001 with 13Mbps information rate and HomePlug AV in 2005 with 150 Mbps information rate aiming at distributing multimedia entertainment content throughout the home.
In the thesis, the focus is put on the cyclic behavior of power-line channels and the verification by measurements. Compared with traditional time-invariant channel models, the cyclic channel model is more close to practical power-line channels. With this in mind, the effects of the cyclic behavior on communication system design are studied and an adaptive modulation scheme to maximize the throughput over cyclic channels is proposed.

摘要.......................................................................i
Abstract..................................................................ii
Contents.................................................................iii
List of Tables...........................................................v
List of Figures.........................................................vi
Chapter 1  Introduction............................................. 1
1.1	Overview of Power-Line Communications................................1
1.2	Outlines......................................3
Chapter 2  Characteristics of Power-Line Channels......4
2.1	Noise.........................................4
2.1.1	Background Noise..............................8
2.1.2	Performance Simulation........................9
2.2	Traditional Time-invariant Channel Model.....11
2.3	Cyclic Behavior..............................17
2.3.1	Measurement Methodology......................18
2.3.2	Statistical Analysis.........................20
Chapter 3  System Structure Description...............24
3.1	Overview of HomePlug 1.0 and HomePlug AV.....24
3.2	HomePlug 1.0.................................27
3.2.1	Modulation...................................27
3.2.2	Scrambler	....................................28
3.2.3	Convolutional Encoder / Viterbi Decoder......28
3.2.4	Puncturing...................................32
3.2.5	Interleaver..................................32
3.2.6	OFDM Symbols.................................33
3.2.7	Preamble.....................................35
3.3	Frame Synchronization........................35
3.4	Channel Estimation	...........................37
3.5	Noise Estimation.............................38
Chapter 4  Adaptive Modulation over Cyclic Channels...41
4.1	Proposed Adaptive Method.....................41
4.2	Performance Simulation.......................43
Chapter 5  Conclusions................................49
Bibliography..........................................50
                                    

[1] Anindya Majumder and J. James Caffery, "Power line communications: an overview," Potentials, IEEE, vol. 23, no. 4, pp. 4-8, Oct.2004.
[2] F. J. Canete, J. A. Cortes, L. Diez, J. T. Entrambasaguas, and J. L. Carmona, "Fundamentals of the cyclic short-time variation of indoor power-line channels," Proc. 9th Int. Symp. Power-Line Commun. and its Applications, pp. 157-161, Apr.2005.
[3] F. J. Canete, L. Diez, J. A. Cortes, and J. T. Entrambasaguas, "Broadband modelling of indoor power-line channels," IEEE Trans. Consumer Electron., vol. 48, no. 1, pp. 175-183, Feb.2002.
[4] J. A. Cortes, F. J. Canete, L. Diez, and J. T. Entrambasaguas, "Characterization of the cyclic short-time variation of indoor power-line channels response," Proc. 9th Int. Symp. Power-Line Commun. and its Applications, pp. 326-330, Apr.2005.
[5] Filippo Tosato and Paola Bisaglia, "Simplified Soft-Output Demapper for Binary Interleaved COFDM with Application to HIPERLAN/2," IEEE Int. Conf. Commun., vol. 2, pp. 664-668, 2002.
[6] M. Gotz, M. Rapp, and K. Dostert, "Power line channel characteristics and their effect on communication system design," Communications Magazine, IEEE, vol. 42, no. 4, pp. 78-86, Apr.2004.
[7] John Terry and Juha Heiskala, OFDM wireless LANs: a theoretical and practical guide. Indianapolis, Ind.: Sams, 2002.
[8] Klaus Dostert, Powerline communications. Upper Saddle River, NJ: Prentice Hall PTR, 2001.
[9] G. Marubayashi and S. Tachikawa, "Spread Spectrum Transmission on Residential Power Line," IEEE 4th Int. Symp. Spread Spectrum Techniques and Applications Proceedings, vol. 3, pp. 1082-1086, Sept.1996.
[10] H. Meng, Y. L. Guan, and S. Chen, "Modeling and analysis of noise effects on broadband power-line communications," IEEE Trans. Power Delivery, vol. 20, no. 2, pp. 630-637, Apr.2005.
[11] R. Nilsson, F. Sjoberg, and J. P. LeBlanc, "A rank-reduced LMMSE canceller for narrowband interference suppression in OFDM-based systems," IEEE Trans. Commun., vol. 51, no. 12, pp. 2126-2140, Dec.2003.
[12] I. C. Papaleonidopoulos, C. N. Capsalis, C. G. Karagiannopoulos, and N. J. Theodorou, "Statistical analysis and simulation of indoor single-phase low voltage power-line communication channels on the basis of multipath propagation," IEEE Trans. Consumer Electron., vol. 49, no. 1, pp. 89-99, Feb.2003.
[13] J. G. Proakis, Digital communications, 4 ed. Boston: McGraw-Hill, 2001.
[14] Thomas Keller and Lajos Hanzo, "Adaptive Modulation Techniques for Duplex OFDM Transmission," IEEE Trans. Veh. Technol., vol. 49, no. 5 Sept.2000.
[15] M. Zimmermann and K. Dostert, "A multipath model for the powerline channel," IEEE Trans. Commun., vol. 50, no. 4, pp. 553-559, Apr.2002.

校內：2016-08-02公開
校外：2026-08-02公開電子論文尚未授權公開，紙本請查館藏目錄

簡易檢索 / 詳目顯示

相關論文