應用於電力線通道之OFDM modem 實作
彭彥龍* 蘇賜麟**
國立成功大學電機工程系碩士班通訊與網路組
摘要
一般居家住宅的低壓電力線網路是一相當便利與低廉的通信媒介。以往應用於電力線網路多為低速率的控制，量測系統。本篇論文中，將針對寬頻電力線通道特性作資料整理、分析與實際量測；並且實現一個電力線通訊系統。我們採用正交分頻多工技術（Orthogonal Frequency Division Multiplexing；OFDM）的架構，並使用德州儀器公司所生產的TMS320C6211 DSP Chip（fixed-point DSP）來實現這個系統，所佔用的頻寬為192 kHz，傳輸速率為96 kbps。

Abstract

Low voltage electrical power distribution networks represent an attractive medium for digital communications. In this thesis we introduce and implement a power line communication system by Orthogonal Frequency Division Multiplexing (OFDM). We implement the power line modem by TI TMS320C6211 DSP. The transceiver runs at the bandwidth 192 kHz, and provides a data rate up to 96 kbps.

[1] EN 50065 part 1: ”Signaling on low voltage electrical installations in the
frequency range 3 kHz to 148.5 kHz , general requirement frequency bands and electromagnetic disturbance. “, CENELEC Brussels Dec. 1992.
[2] Title 47, Chapter I, Part 15.113, Federal Communications Commission rules and regulations, USA.
[3] HomePlug 1.0 Specification, HomePlug Powerline Alliance, 2001.
[4] Richard van Nee and Ramjee Prasad,”OFDM Wireless Multimedia Communications ,”Artech House, 2000.
[5] Weilin Liu; Widmer, H.P.; Aldis, J.; Kaltenschnee, T., “Nature of Power Line Medium and Design Aspects for Broadband PLC System”, International Zurich Seminar on Broadband Communications, 2000
[6] Liu, D.; Flint, E.; Gaucher, B.; Kwark, Y., “Wide Band AC Power Line Characterization”, IEEE Transactions on Consumer Electronics, Volume: 45 Issue: 4, Nov. 1999
[7] K. M. Dostert, “Power Lines as High Speed Data Transmission Channels-Modelling the Physical Limits”, IEEE 5th International Symposium on Spread Spectrum Techniques and Applications, pp.585-589, 1998
[8] T. Waldeck, M. Busser, K. Dostert, “Telecommunication Applications over the Low Voltage Power Distribution Grid”, IEEE 5th International Symposium on Spread Spectrum Techniques and Applications, pp.73-77, 1998.
[9] A.M. J. Goiser, “Direct-Sequence Spread-Spectrum Modem for Data Communications Over Power-Lines”, MILCOM 97, pp.1052-1056, 1997.
[10] R.M. Vines, “The Characteristics of Residential Impedances and Noisesource for Power Line Carrier Communication”, Center for Communication and Signal Processing, North Carolina State University Raleigh, NC, June 10, 1983.
[11] H.C. Ferreira, H.M. Grove, O. Hooijen, Vinck. Han, A.J. AFRICON, “Power Line Communications: an Overview”, IEEE AFRICON Volume: 2, pp.558 -563, 1996.
[12] J.R. Nicholson and J.A. Malack, “RF Impedance of Power Lines and Line Impedance Stabilization Networks in Conducted Interferences Measurement”, IEEE Transactions on Electromagnetic Compatibility, vol. EMC-15, pp.84-86, May 1973.
[13] J.A. Malack and J.R. Engstrom, ”RF Impedance of United States and European Power Lines”, IEEE Transactions on Electromagnetic Compatibility, vol. EMC-18, pp.34-38,Feb 1976.
[14] G. Marubayshi and S. Tachikawa, ”Spread Spectrum Transmission on Residential Power Line”, in Processing of 4th IEEE International Symposium on Spread Spectrum Techniques and Applications, Mainz, Germany, pp. 1082-1086, Sept. 22-25 1996.
[15] Texas Instruments, “TMS320C6000 CPU and Instruction Set Reference Guide ”, Jan. 2000.
[16] Texas Instruments,”TMS320C6000 Peripherals Reference Guide”, April 1999
[17] Yi-Shenq Wang, ”Communication Using Spread Spectrum Modulation on Distribution Power Line”, National Sun Yat-Sen University Electrical Engineering, Taiwan, June 1998.