以小波理論進行OFDM電力線濾除雜訊之FPGA晶片設計

在現今科技不斷進步的時代，家庭所使用的傳統電力線不在只是單純用來傳送電力，還可以將數位資料利用數位調變技術將載波資料進行傳輸。本論文將使用正交分頻多工技術將載波資料進行高速傳輸。本論文主要分為三種架構設計，一是傳送端傳送資料並進行升頻傳送載波資料，在傳送端主要由錯誤更正碼、反快速傅立葉轉換、I/Q調變區塊等所組成。二是接收端接收載波資料並進行降頻解調，在接收端主要由解調變、快速傅立葉轉換、解編碼等區塊所組成。三是使用耦合電路來阻隔市電。最後藉由使用小波濾波器廣泛地驗證實務上的統計錯誤率，以達到降低錯誤率的目的。本論文將以理論上的分析與實務上的驗證，並以考慮加入白色高斯雜訊，電力線長短及並聯不同負載，由結果可以很明顯的發現，考慮電力線長短與並聯不同負載對於錯誤率並不會有明顯的改變，對於加入白色高斯雜訊(AWGN)其位元錯誤率(BER)有著明顯的改變，本論文將以使用小波濾波器進行濾除電力線上的雜訊，在其位元錯誤率有著明顯的降低。

關鍵字

正交分頻多工； I/Q調變器；電力線通訊；快速傅立葉轉換；耦合電路；數位濾波器； FPGA晶片；小波濾波器

並列摘要

Due to technology progress nowadays, the power-line at home can not only transfer power but also can transmit digital signals using modulation. The thesis uses OFDM for high-speed data transmission. This thesis has three parts: First, the sending part includes FEC, IFFT, I/Q modulation and so on. Second, the receiving part consists of demodulation, FFT, decoding and so on. Third, a coupling circuit is included. Finally, wavelet filter and extensive verification were used to reduce the error rate statistics on the experiments to achieve the goal. This thesis conducts verification on the practice and analysis on theory. This thesis considers AWGN, different lengths and loads. The parallel power line of different lengths and loads that will not change BER but BER will be changed by adding AWGN. Wavelet filter plays an important role to reduce the noise for power-line in this thesis.

並列關鍵字

Digital Filter. ； FPGA Chip ； Wavelet Filter ； I / Q Modulator ； Fast Fourier Transform ； Power Line Communication ； Orthogonal Frequency Division Multiplexing ； Coupled Circuit

參考文獻

[20]李子豪，「利用FPGA晶片實現正交分頻多工調變以進行電力線通訊」，私立中原大學電機工程研究所碩士論文，2010。

[1]Haibo He and Shijie Cheng, “Analysis of Reflection of Signal Transmitted in Low-Voltage Powerline With Complex Wavelet,” IEEE Trans. Om Power Delivery, Vol.19, Jan. 2004, pp. 86-91.

[2]Haibo He and Shijie Cheng, “Home network Power-Line Communication Signal Processing Based on Wavelet Packet Analysis,” IEEE Trans. On Power Delivery, Vol.20, No.3, July 2005, pp. 1879-1885.

[3]Chunfeng Luo and Shijie Cheng, “A Nonlinear Equalization Method Based on Multilayer Perception for OFDM Power Line Communication,” IEEE Trans. On Power Delivery, Vol.2, No.1, March 2009, pp.2437-2442.

[4]Julian Meng and Andrew E.Marble, “Effective Communcation Strategies for Noise –Limited Power-Line Channel,” IEEE Trans. On Power Delivery, Vol.22, No.2, 2007, pp. 887-892.

國際替代計量

以小波理論進行OFDM電力線濾除雜訊之FPGA晶片設計

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