發(fā)布時間：2018-10-14 11:16

【摘要】：隨著通信技術(shù)的飛速發(fā)展,電力線作為覆蓋范圍最廣的網(wǎng)絡(luò),頻率范圍高達(dá)30MHz的低壓電力線被認(rèn)為可以實現(xiàn)包括Internet接入、視頻和語音流等應(yīng)用的高數(shù)據(jù)率傳輸,成為“最后一公里”的解決方案之一,電力線信道特性的研究已成為熱點研究課題。信道仿真器能夠模擬實際電力線中信道衰落以及噪聲情況,通過將特定的發(fā)送信號經(jīng)過信道仿真器后,觀察接收端信號的時域和頻域特性,能夠決定該發(fā)送信號是否適合在此信道環(huán)境下傳輸,并且通過對信道參數(shù)的不同配置,可以在信道仿真器中模擬實現(xiàn)各種場景下的信道,這對于設(shè)備的選型以及信道的實際研究都具有重大意義。近些年來,雖然國內(nèi)已經(jīng)在低壓電力線通信系統(tǒng)的研究中取得了重大進(jìn)展,但是,在實驗環(huán)境下對電力線信道仿真系統(tǒng)的測試和仿真仍為空白。本文討論了面向電力線信道特性的信道仿真器的研究與實現(xiàn),對電力線通信系統(tǒng)的信道和噪聲特性進(jìn)行了研究和探索,并對國內(nèi)外的電力線信道的實現(xiàn)方法進(jìn)行了對比分析,運用FPGA技術(shù)實現(xiàn)電力線信道和噪聲的硬件仿真,并在實驗室環(huán)境下測試了PLC(Power-Line Communication)設(shè)備在其上的數(shù)據(jù)傳輸特性,驗證了系統(tǒng)的可行性。本文的研究重點是根據(jù)電力線通信系統(tǒng)中信道和噪聲特性,結(jié)合FPGA的并行處理特點,通過優(yōu)化信道和噪聲模型,提出了基于FPGA的電力線通信測試系統(tǒng)仿真主機(jī)的硬件實現(xiàn)方案,并將方案細(xì)化為不同的功能模塊。此外,基于Verilog硬件描述語言在Modelsim環(huán)境中進(jìn)行了功能仿真,并在ISE中進(jìn)行了功能完善。最后在實驗室環(huán)境下,通過A/D和D/A模塊實現(xiàn)了數(shù)模間轉(zhuǎn)換功能及PLC設(shè)備間的雙向通信,并通過示波器獲取了信道和噪聲的時域波形。
[Abstract]:With the rapid development of communication technology, power line as the most extensive network, low voltage power line with frequency range up to 30MHz is considered to be able to achieve high data rate transmission, including Internet access, video and voice stream applications. As one of the "last kilometer" solutions, the study of power line channel characteristics has become a hot research topic. The channel simulator can simulate the channel fading and noise in the actual power line. By passing the specific transmitted signal through the channel simulator, the time domain and frequency domain characteristics of the signal at the receiving end can be observed. It is possible to determine whether the transmitted signal is suitable for transmission in this channel environment, and through different configuration of channel parameters, the channel under various scenarios can be simulated in a channel simulator. This is of great significance to the selection of equipment and the actual research of channel. In recent years, although great progress has been made in the research of low-voltage power line communication system in China, the test and simulation of power line channel simulation system in the experimental environment is still blank. In this paper, the research and implementation of the channel simulator for power line channel characteristics are discussed, the channel and noise characteristics of power line communication system are studied and explored, and the implementation methods of power line channel at home and abroad are compared and analyzed. The hardware simulation of power line channel and noise is realized by using FPGA technology. The data transmission characteristics of PLC (Power-Line Communication) equipment on it are tested in the laboratory environment, and the feasibility of the system is verified. According to the characteristics of channel and noise in power line communication system and the parallel processing characteristics of FPGA, this paper puts forward the hardware implementation scheme of power line communication test system simulation host based on FPGA by optimizing channel and noise model. The scheme is refined into different functional modules. In addition, the function is simulated in Modelsim environment based on Verilog hardware description language, and the function is perfected in ISE. Finally, in the laboratory environment, the digital-to-analog conversion function and the two-way communication between PLC devices are realized by means of A / D and D / A modules, and the time-domain waveforms of channel and noise are obtained by oscilloscope.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN913.6;TN791

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 張龍菲;面向智能電網(wǎng)的寬帶電力線通信系統(tǒng)資源分配研究[D];華北電力大學(xué);2012年

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本文編號：2270293