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研究生: 楊永軒
Yung-hsuan Yang
論文名稱: 窄頻電力線通訊系統研究與OFDM Modem實作
Narrowband Power Line Communication System Study and OFDM Modem Implementation
指導教授: 曾德峰
Der-Feng Tseng
口試委員: 韓永祥
Yung-hsiang S. Han
張立中
Li-Chung Chang
學位類別: 碩士
Master
系所名稱: 電資學院 - 電機工程系
Department of Electrical Engineering
論文出版年: 2012
畢業學年度: 100
語文別: 中文
論文頁數: 128
中文關鍵詞: 窄頻電力線通訊正交分頻多工多速率信號處理。
外文關鍵詞: narrow band power line communication, OFDM, multirate signal processing
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隨著智慧電網的興起,窄頻電力線通訊成為其中一項關鍵的技術,目前窄頻
電力線通訊主要採用的調變技術為正交分頻多工(OFDM),如PRIME與G3-PLC
皆是採用此調變技術的全球性窄頻電力線通訊規範。而本文主要是參考G3-PLC
的實體層規格,以數位信號處理器進行 OFDM 調變,搭配數位類比轉換器與耦
合電路來實作一組能於電力線中傳收訊號的窄頻電力線通訊模組,以建立可供研
究與實測的測詴帄台。本文中也利用多速率信號處理與多重相位分解濾波器來解
決OFDM系統中傳送端與接收端取樣速率不匹配的問題。最後則在通電與加入
電器負載的電力線中進行實際的傳收測詴,探討其在各種環境中傳輸時的效能與
可能遇到的問題。


With the strong demand for efficient energy usage by virtue of the smart grid, narrow band power line communication (NB-PLC) has been playing a crucial role recently. Widely used in PLC, Orthogonal Frequency Division Multiplexing (OFDM) technology is employed in the global narrow band power line communication standards, such as PRIME and G3-PLC. In this thesis, we first introduce the G3-PLC physical layer specification, and then implement the OFDM power line modem by digital signal processor, analog to digital daughter card, and coupling circuit. Indeed, we can build a test platform by the PLC modem to undergo noise measurements as well as study power line environment. Finally, we experiment the PLC modem in power line with electrical appliances to discuss their noise and loading effects on the power line communication. To cope with the quality of service for narrowband PLC signaling, a software-implemented digitial filter is devised to compensate for the performance loss from couplers, neglected by the previously design.

第1章 緒論 1 1.1 研究背景 1 1.2 研究目的 1 1.3 章節概述 2 第2章 電力線通道特性 3 2.1 電力線通道簡介 3 2.2 電力線通道模型建立方法概述 4 2.2.1 多重路徑模型與Top-down的建立方法 4 2.2.2 ABCD傳輸矩陣與Bottom-up的建立方法 12 2.3 電力線通道參考模型與通道模型產生器 15 2.3.1 OPERA戶外與室內通道參考模型 15 2.3.2 室內通道模型產生器 20 2.4 實際電力線通道量測與模型建立 26 2.4.1 實際電力線通道響應量測 27 2.4.2 實際電力線通道的模型建立 33 第3章 OFDM系統架構設計 39 3.1 OFDM正交分頻多工技術簡介 39 3.1.1 正交分頻多工原理與快速傅立葉轉換的實現 39 3.1.2 保護區間與循環字首 43 3.1.3 OFDM的特點 44 3.2 系統規格簡介 45 3.2.1 G3-PLC 系統簡介 45 3.2.2 G3-FCC OFDM實體層規格 46 3.3 OFDM傳送端設計 48 3.3.1 傳送端架構 48 3.3.2 時域窗函數 55 3.3.3 前置封包 59 3.4 OFDM接收端設計 60 3.4.1 接收端架構 60 3.4.2 時間同步 60 3.4.3 OFDM 解調 62 3.5 系統模擬 63 第4章 多速率信號處理 65 4.1 取樣頻率變換的基本操作 65 4.1.1 降頻取樣與抽值濾波器 65 4.1.2 升頻取樣與插值濾波器 67 4.1.3 有理數倍的取樣頻率變換 69 4.2 多重相位FIR濾波器組於多速率信號處理的應用 70 4.2.1 Noble恆等式 70 4.2.2 FIR濾波器的多重相位分解 71 4.2.3 以多重相位FIR濾波器實現抽值降頻 72 4.2.4 以多重相位FIR濾波器實現插值升頻 74 4.2.5 以多重相位FIR濾波器實現有理數倍的取樣頻率轉換 75 第5章 電力線通訊收發模組實作 76 5.1 硬體功能介紹 76 5.1.1 C6416數位信號處理器軟硬體開發平台 76 5.1.2 ADC / DAC 子卡 79 5.1.3 耦合器電路 80 5.2 系統實作與建置 82 5.2.1 傳送端系統建置 82 5.2.2 接收端系統建置 85 5.2.3 多速率信號處理的多重相位架構演算法實現 90 第6章 系統實測 98 6.1 理想通道環境下的系統實測 99 6.2 通電通道與加入電器負載的系統實測 102 6.2.1 以AC Generator 和LISN 作為電源的系統實測 102 6.2.2 加入鎢絲燈泡作為電器負載的系統實測 106 6.2.3 加入LED與省電燈泡作為電器負載的系統實測 108 6.3 加入數位高通濾波器的系統實測 112 第7章 結論 121 7.1 總結 121 7.2 未來研究 121 附錄表 126 附錄I TWO-PATH MODEL 推導 126 附錄II 參數轉換副程式: “DATCABLES_ALTERED.M” 127

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