在數位訊號處理的平台上實現電力線通訊系統

電力線通訊是透過電力線載波的方式來傳送網路資訊，電力線通訊各個聯盟為各國的廠商一起聯合制定，制定上皆是以正交分頻多工電力線通訊為標準。近年來，通訊上的正交分頻多工技術發展成熟，並運用至電力線通訊，以及晶片製程的進步，讓電力線通訊這個新興的通訊技術得以實現。本研究的實作運用快速傅立葉轉換演算法，快速傅立葉轉換演算法是正交分頻多工技術中的關鍵演算法，可以有效的降低複數乘法與複數加法的數學運算。本研究以德州儀器之數位信號處理實作平台及整合式發展環境，實現電力線通訊正交分頻多工系統。並透過最佳化機制有效提升其工作速度3%~7%及降低記憶體需求5%~9%。並藉由降低記憶體需求及提升工作速度的搭配使用，將記憶體需求再減少約1%~5%。

關鍵字

電力線通訊；正交分頻多工；快速傅立葉轉換；最佳化

並列摘要

Power Line Communications (PLC) is a promising emerging technology, which has attracted much attention due to the wide availability of power distribution lines. PLC based on Orthogonal Frequency Division Multiplexing (OFDM) and is a multicarrier modulation technique. It is using Inverse Discrete Fourier Transform (IDFT). A large amount of work has been devoted to reducing the computation time of a Discrete Fourier Transform (DFT). This has led to efficient algorithms which are known as Fast Fourier Transform (FFT) algorithms. In this thesis, we will implement the PLC system based on Texas Instruments’ (TI) Digital Signal Processor (DSP) platform, TMS320C6416. Besides, after optimizing the operation cycle, the speed will be improved 3% to 7%. After optimizing the code size, the size will be reduced 5% to 9%. By optimizing both of speed and code size, code size will be reduced additional 1% to 5%.

並列關鍵字

OFDM ； FFT ； Optimization ； PLC

參考文獻

[6] H. Kim, B. Varadarajan, and A. Dabak, “Performance Analysis and Enhancements of Narrowband OFDM Powerline Communication Systems,” in Proceedings of the IEEE Communication and Medical Systems Laboratory, pp. 362-367, 2010.

[14] M. S. Gast, 802.11 Wireless Networks: The Definitive Guide, O’Reilly Media, pp. 261-267, 2005.

[1] 蒲冠志，林俊良，“電力線通訊(PLC)系統工程系列專刊(一)”，經濟部通訊產業發展推動小組，pp. 1-4，2007。