多输入多输出电力线通信信道特性研究

发布时间：2018-06-06 15:35

本文选题：多输入多输出 + 电力线通信　；参考：《华北电力大学(北京)》2017年博士论文

【摘要】：随着数字通信技术的发展,新的通信业务需求对电力线通信(Power Line Communication,PLC)技术提出了更高的要求,利用现有电力线架构有效传输高质量的通信信号具有重大的经济效益和社会效益。多输入多输出电力线通信(Multi-input Multi-output Power Line Communication,MIMO-PLC)作为一种有效对抗PLC信道多径衰落、提高PLC可靠性和信道容量的潜在有效手段受到了业界愈来愈广泛的关注。针对目前关于MIMO-PLC信道特性的研究和掌握不够充分、国内鲜有MIMO-PLC技术相关研究的文献报道的情况,本文对2~100MHz范围内的宽带MIMO-PLC信道特性进行了全面而深入的分析研究。本文基于多导体传输线理论,建立了适用于宽带MIMO-PLC信道的可靠模型;结合模型和测量数据,详细分析了2~100MHz范围内宽带MIMO-PLC信道特性的变化规律;基于改进模型,建立了宽带MIMO-PLC随机参数信道模型,并提出了一种针对宽带MIMO-PLC信道的“混合”建模方法,首次对宽带MIMO-PLC信道的随机特性进行了全面的分析;利用频率切片小波变换首次详细分析了2~100MHz范围内宽带MIMO-PLC信道的噪声特性;建立了中继模型,首次详细分析了中继对宽带MIMO-PLC信道特性的影响。本文的研究旨在全面了解和掌握宽带MIMO-PLC信道特性及变化规律,为宽带MIMO-PLC系统的设计提供理论和数据支持,促进宽带MIMO-PLC技术进一步发展。本文取得的主要研究成果如下:(1)提出了一种针对宽带MIMO-PLC信道的改进模型。通过对低压室内配电网常用电缆中影响PLC信道特性的一次线参数进行详细的分析,揭示了低压室内配电网常用电缆一次线参数随频率变化的规律;基于多导体传输线理论分析了基于电压比的宽带MIMO-PLC信道基本模型建模过程,在考虑绝缘材料电特性的情况下,提出了一种针对宽带MIMO-PLC信道的改进模型,对无分支和有分支情况下的宽带MIMO-PLC信道进行了有效建模,并将模型计算值与实际测量数据进行了对比。结果显示,模型能够很好的描述宽带MIMO-PLC实际信道的特性,达到了预期效果,模型为宽带MIMO-PLC信道特性的研究提供了可靠的分析工具。(2)系统地分析了宽带MIMO-PLC信道传输特性和输入阻抗特性随信道拓扑变化而变化的规律,系统地分析了宽带MIMO-PLC信道上的噪声特性。设计和搭建了多种拓扑结构的宽带MIMO-PLC网络,利用网络分析仪对每种拓扑结构网络的传输函数和输入阻抗进行了大量测量,利用测量数据并结合所建宽带MIMO-PLC信道模型,定量分析了分支长度、分支位置和分支数量对宽带MIMO-PLC信道特性的影响;对在线情况下的信道特性进行了建模并与实际测量值进行了对比,进一步证明了建模思路和方法的正确性;对典型环境下宽带MIMO-PLC信道中的噪声进行了测量,并利用频率切片小波时频分析方法对宽带范围内MIMO-PLC信道噪声的特性进行了全面的分析和研究。这些研究对于简化宽带MIMO-PLC信道特性的研究、系统设计和工程应用具有重要意义。(3)首次全面地分析了宽带MIMO-PLC随机参数信道特性;提出了一种针对宽带MIMO-PLC信道的“混合”建模方法,对不同带宽下的宽带MIMO-PLC信道特性进行了全面的分析。利用本文的改进模型建立了针对特定场景的宽带MIMO-PLC随机参数信道模型,并对随机参数宽带MIMO-PLC信道特性进行了全面的研究和分析,模型利用统计分布来表征信道的物理参数,比较分析了参数随机且分支不同的MIMO-PLC宽带信道特征;结合电力线信道自下而上建模和自上而下建模两种建模方法,提出了一种宽带MIMO-PLC混合模型,为宽带MIMO-PLC信道特性分析、研究及工程应用提供了一种先验宽带MIMO-PLC信道建模方法。给出了相关算例,分析了算例在2~30MHz和2~100MHz两种带宽下的信道特征和参数。(4)首次详细分析了中继对宽带MIMO-PLC信道特性的影响。以放大转发中继模式(amplify-and-forward,AF)作为宽带MIMO-PLC中继模式,基于本文建立的宽带MIMO-PLC直接链路信道模型建立了宽带MIMO-PLC信道中继模型。从理论上详细分析了中继对于宽带MIMO-PLC信道特性影响。
[Abstract]:With the development of digital communication technology, new communication services demand higher requirements for Power Line Communication (PLC) technology. The effective transmission of high quality communication signals with existing power line architecture has great economic and social benefits. Multi input and multi output power line communication (Multi-input Multi-outp) UT Power Line Communication, MIMO-PLC), as a potential effective means to effectively combat the multipath fading of PLC channel and improve the reliability and channel capacity of PLC, has attracted more and more attention in the industry. In view of the lack of research and mastery of the characteristics of MIMO-PLC channel, there are few literature reports on the related research of MIMO-PLC technology in China. In this paper, the wideband MIMO-PLC channel characteristics in the 2~100MHz range are thoroughly and deeply analyzed. Based on the multi conductor transmission line theory, a reliable model for broadband MIMO-PLC channel is established, and the variation of the broadband MIMO-PLC channel characteristics in the 2~100MHz range is analyzed in detail by combining the model and the measured data. Based on the improved model, a broadband MIMO-PLC random parameter channel model is established, and a "hybrid" modeling method for broadband MIMO-PLC channel is proposed. The random characteristics of the broadband MIMO-PLC channel are comprehensively analyzed for the first time, and the broadband MIMO-PLC channel in the 2~100MHz range is analyzed for the first time by using the frequency slice wavelet transform. A relay model is established. The effect of relay on the characteristics of broadband MIMO-PLC channel is analyzed in detail for the first time. The aim of this paper is to understand and master the characteristics and change rules of broadband MIMO-PLC channel in an all-round way, to provide theoretical and data support for the design of broadband MIMO-PLC system, and to promote the further development of broadband MIMO-PLC technology. The main research results are as follows: (1) an improved model for broadband MIMO-PLC channel is proposed. Through the detailed analysis of the first line parameters affecting the PLC channel characteristics in the common cables of the low-voltage indoor distribution network, the rule of the frequency variation with the frequency of the primary cable in the low-voltage indoor distribution network is revealed. The line theory analyses the basic model modeling process of broadband MIMO-PLC channel based on voltage ratio. Considering the electrical properties of insulating materials, an improved model for broadband MIMO-PLC channel is proposed. The effective modeling of the broadband MIMO-PLC channel without branch and branching is carried out, and the calculated value and the actual measurement number are also calculated. The results show that the model can well describe the characteristics of the broadband MIMO-PLC actual channel and achieve the expected effect. The model provides a reliable analysis tool for the study of the broadband MIMO-PLC channel characteristics. (2) the characteristics of the broadband MIMO-PLC channel and the input impedance characteristics vary with the channel topology changes. The noise characteristics on the broadband MIMO-PLC channel are systematically analyzed. A wide band MIMO-PLC network is designed and constructed. The network analyzer is used to measure the transmission function and input impedance of each topology network, and the measured data are combined with the built broadband MIMO-PLC channel model, and the quantitative analysis is made. The influence of branch length, branch position and branch number on the characteristics of broadband MIMO-PLC channel; modeling the channel characteristics in the online situation and comparing with the actual measured values, further proving the correctness of the modeling ideas and methods, measuring the noise in the wideband MIMO-PLC channel under the typical environment, and using the frequency. The sliced wavelet time-frequency analysis method is used to analyze and study the characteristics of the MIMO-PLC channel noise in the wideband range. These studies are of great significance to simplify the research on the characteristics of the wideband MIMO-PLC channel, system design and engineering applications. (3) the characteristics of the wide band MIMO-PLC random parameter channel are analyzed for the first time. In view of the "hybrid" modeling method of broadband MIMO-PLC channel, the characteristics of wideband MIMO-PLC channel under different bandwidth are comprehensively analyzed. Using this improved model, a wideband MIMO-PLC random parameter channel model for specific scene is established, and the characteristics of random parameter broadband MIMO-PLC channel are thoroughly studied and analyzed. The model uses statistical distribution to characterize the physical parameters of the channel, compares and analyzes the characteristics of the MIMO-PLC wideband channel with random and different branches, and combines the bottom-up and top-down modeling methods of the power line channel, and proposes a wideband MIMO-PLC hybrid mode, which is the characteristics of broadband MIMO-PLC channel analysis, research and work. Cheng Yingyong provides a priori broadband MIMO-PLC channel modeling method. An example is given and the channel characteristics and parameters of the two bandwidth of 2~30MHz and 2~100MHz are analyzed. (4) the influence of the relay on the broadband MIMO-PLC channel characteristics is analyzed in detail for the first time. The amplification and forwarding mode (amplify-and-forward, AF) is used as a broadband MIMO-P. The LC relay mode, based on the wideband MIMO-PLC direct link channel model established in this paper, establishes a broadband MIMO-PLC channel relay model. The effect of relay on the broadband MIMO-PLC channel characteristics is analyzed in detail.
【学位授予单位】：华北电力大学(北京)
【学位级别】：博士
【学位授予年份】：2017
【分类号】：TN913.6

【参考文献】