基于OFDM的电力线载波通信系统外收发机关键技术研究

发布时间：2019-05-30 04:12

【摘要】：目前,应用OFDM (Orthogonal Frequency Division Multiplexing,正交频分复用)技术的电力线通信(Power line communication,简称PLC)技术,在远程抄表、智能控制等日常的各个方面应用广阔。然而,电力线通信环境相当复杂,随机引入的干扰非常严重,尤其是在低压电力线通信系统中。因此,采取必要的措施去提高通信的抗干扰性能,从而提高通信的质量,一直是PLC系统所关注的研究热点和难点。本文从有效提高PLC抗干扰性能的前向纠错编码(Forward Error Correction,简称FEC)基带信号处理技术出发,对基于OFDM的PLC系统外收发机关键技术进行研究,具体的研究内容和成果概括如下：(1)对基于OFDM的PLC系统的整体架构、各项参数的意义等进行研究。对基于OFDM的PLC系统外收发机关键技术,包括加扰／解扰、交织／解交织等技术进行理论研究。(2)通过分析常用的PLC协议物理层架构,对PLC的外收发机结构进行研究,并给出本文所使用的外收发机结构。(3)对PLC系统外收发机扰码技术、交织技术设计原理进行研究,并进行相应的设计实现和仿真验证。(4)阐述了应用于PLC系统的外收发机Turbo编译码技术原理,将Turbo编译码器以IP核模块调用的形式进行仿真验证。(5)对所研究的基于OFDM的PLC系统外收发机进行了整体的仿真验证。
[Abstract]:At present, the power line communication (Power line communication, (PLC) technology based on OFDM (Orthogonal Frequency Division Multiplexing, orthogonal Frequency Division Multiplexing (OFM) technology is widely used in remote meter reading, intelligent control and other daily aspects. However, the power line communication environment is very complex, and the random interference is very serious, especially in the low voltage power line communication system. Therefore, taking necessary measures to improve the anti-interference performance of communication, so as to improve the quality of communication, has always been the focus and difficulty of PLC system. In this paper, based on the baseband signal processing technology of forward error correction coding (Forward Error Correction, (FEC), which effectively improves the anti-interference performance of PLC, the key technology of PLC system external transceiver based on OFDM is studied. The specific research contents and results are summarized as follows: (1) the overall architecture of PLC system based on OFDM and the significance of various parameters are studied. The key technologies of PLC external transceiver based on OFDM, including scrambling / descrambling, interleaving / deinterleaving and so on, are studied theoretically. (2) by analyzing the physical layer architecture of PLC protocol, the external transceiver structure of PLC is studied. The structure of the external transceiver used in this paper is given. (3) the scrambling technology and interleaving technology of the external transceiver in PLC system are studied. The corresponding design, implementation and simulation verification are carried out. (4) the principle of Turbo encoding and decoding technology applied to PLC system is described. The Turbo encoder and decoder are simulated and verified in the form of IP core module call. (5) the external transceiver of PLC system based on OFDM is verified by simulation.
【学位授予单位】：北方工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN913.6;TN859

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