電力線通訊通道量測與發射機實現; Channel Measurement and Transmitter Implementation of Power Line Communications

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Title:	電力線通訊通道量測與發射機實現;Channel Measurement and Transmitter Implementation of Power Line Communications
Authors:	蕭嵎之;Hsiao,Yu-jhih
Contributors:	通訊工程學系
Keywords:	電力線通訊;正交分頻多工;現場可程式化閘陣列;PLC;OFDM;FPGA
Date:	2013-07-23
Issue Date:	2013-08-22 12:07:17 (UTC+8)
Publisher:	國立中央大學
Abstract:	電力線通訊近來蓬勃發展，可藉由既有之電力線路傳遞訊號，不需重新佈線，可解決通訊傳輸中最後一哩的問題。在本篇論文中，對電力線通道進行了以軟體方式的測量環境，並且針對電力線通道的特有現象進行探討，包括了特殊雜訊以及通道變化等。此外設計並且實現了在電力線上通訊的即時軟體定義OFDM 發射機與接收機。在平台使用了FPGA 實驗板、數位轉類比與類比轉數位開發板以及自製電力線類比前級。在發射機之訊號處理模組中設計了串列轉並列處理器、高速回旋碼編碼器、訊號交錯器、星座圖映射器、反快速傅立葉轉換器、循環字首置入器和前導符碼置入器等，而在接收機設計了訊號同步器、快速傅立葉轉換器、通道估測器、通道等化器、硬式決策器、訊號解交錯器及通道解碼器等。傳送頻帶為2.3MHz~20MHz，在64-QAM的模式之下最高傳輸率為42.52Mbps 。 Power Line Communication (PLC) system is a flourishing communication technology, which can transmit signal over the existing AC electrical wiring without building whole new network and deal with the last mile issue. In this thesis, we formed a software method to measuring PLC channel's feature and investigated a particular phenomenon of powerline channel-special noise and channel changing.In other way, we design and implement a real-time software defined OFDM transceiver over powerline. In this platform, we use FPGA, DAC/ADC EVM board and design PLC Analogy-Front-End (AFE). The transmitter includes parallel-to-serial module, high-rate convolutional encoder, signal interleaver, constellation mapper, Invers FFT, cyclic prefix inserter and preamble inserter. The receiver includes signal synchronizer, FFT, channel estimator, channel equalizer, hard decider, signal de-interleaver and channel decoder etc. Transmission bandwidth between 2.3MHz$ and 20MHz$. In 64-QAM mode, the maximum throughput is around 42.52Mbps.
Appears in Collections:	[Graduate Institute of Communication Engineering] Electronic Thesis & Dissertation

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