电力线信道特性分析及FPGA硬件实现
发布时间：2018-10-14 11:16
【摘要】：随着通信技术的飞速发展,电力线作为覆盖范围最广的网络,频率范围高达30MHz的低压电力线被认为可以实现包括Internet接入、视频和语音流等应用的高数据率传输,成为“最后一公里”的解决方案之一,电力线信道特性的研究已成为热点研究课题。信道仿真器能够模拟实际电力线中信道衰落以及噪声情况,通过将特定的发送信号经过信道仿真器后,观察接收端信号的时域和频域特性,能够决定该发送信号是否适合在此信道环境下传输,并且通过对信道参数的不同配置,可以在信道仿真器中模拟实现各种场景下的信道,这对于设备的选型以及信道的实际研究都具有重大意义。近些年来,虽然国内已经在低压电力线通信系统的研究中取得了重大进展,但是,在实验环境下对电力线信道仿真系统的测试和仿真仍为空白。本文讨论了面向电力线信道特性的信道仿真器的研究与实现,对电力线通信系统的信道和噪声特性进行了研究和探索,并对国内外的电力线信道的实现方法进行了对比分析,运用FPGA技术实现电力线信道和噪声的硬件仿真,并在实验室环境下测试了PLC(Power-Line Communication)设备在其上的数据传输特性,验证了系统的可行性。本文的研究重点是根据电力线通信系统中信道和噪声特性,结合FPGA的并行处理特点,通过优化信道和噪声模型,提出了基于FPGA的电力线通信测试系统仿真主机的硬件实现方案,并将方案细化为不同的功能模块。此外,基于Verilog硬件描述语言在Modelsim环境中进行了功能仿真,并在ISE中进行了功能完善。最后在实验室环境下,通过A/D和D/A模块实现了数模间转换功能及PLC设备间的双向通信,并通过示波器获取了信道和噪声的时域波形。
[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.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN913.6;TN791
本文编号：2270293
[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.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN913.6;TN791
【参考文献】
相关硕士学位论文 前1条
1 张龙菲;面向智能电网的宽带电力线通信系统资源分配研究[D];华北电力大学;2012年
，本文编号：2270293
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