多载波技术是5G 通信系统的关键技术，本文主要介绍了三种面向5G 比较常见的多载波传输技术，包括滤波器组多载波（FBMC）、通用滤波多载波(UFMC) 以及广义频分复用(GFDM)，将三种技术进行比较分析，探讨其自身的优劣势。结果显示，FBMC 技术具有较高的时频效率，但其缺陷为帧的长度过长，不能用于短包类业务；UFMC 能够支持较短的系统帧，但由于未使用CP，对短时间的不重合更敏感；而GFDM 具备有灵活的帧结构，而且相比前两者者的复杂度要低，方便于实际应用。
Multi-carrier technology is the key technology of 5G communication system. This paper mainly introduces three common multi-carrier transmission technologies for 5G, including filter bank multi-carrier (FBMC), general filter multi-carrier (UFMC) and generalized frequency division multiplexing (GFDM).The results show that FBMC technology has high time-frequency efficiency, but its defect is that the frame length is too long to be used in short packet service.UFMC can support shorter system frames, but is more sensitive to short mismatches because it does not use CP.GFDM has a flexible frame structure, and the complexity is lower than the former two, which is convenient for practical application. (2020-03-10, PDF, 1220KB, 下载8次)
第5 代移动通信系统(5G) 是面向2020 年之后的新一代移动通信系统, 其技术发展尚处于探
索阶段. 结合国内外移动通信发展的最新趋势, 本文对5G 移动通信发展的基本需求、技术特点与可
能发展途径进行了展望, 并分无线传输和无线网络两个部分, 重点论述了富有发展前景的7 项5G 移
动通信关键技术, 包括大规模天线阵列、基于滤波器组的多载波技术、全双工复用、超密集网络、自
组织网络、软件定义网络及内容分发网络. 本文还概括性地介绍了国内5G 移动通信的相关研发活
动及其近期发展目标.
The 5th generation mobile communication system (5G) is a new generation mobile communication system after 2020, and its technological development is still under exploration
Cable stage. Combined with the latest trend of mobile communication development at home and abroad, this paper presents the basic needs, technical characteristics and feasibility of 5G mobile communication development The way of energy development is prospected, and divided into two parts: wireless transmission and wireless network The key technologies of mobile communication include large-scale antenna array, multi-carrier technology based on filter bank, full duplex multiplexing, super dense network and self -
Organization network, software defined network and content distribution network. This paper also introduces the research and development of 5G mobile communication in China
Action and its recent development goals. (2020-03-10, PDF, 314KB, 下载7次)
以广域相量测量系统为技术平台，建立基于模型预测控制的含规模化风电场/群互联电网的负荷频率分散预测控制模型。以典型双区域负荷频率控制模型为例，考虑不同风电渗透率情况。仿真研究结果表明，所提基于模型预测控制的负荷频率分散控制模型不但能够有效地跟踪风电输出功率的随机波动， 维持系统频率及区域间交换功率在较小的范围内变化， 并且控制效果明显优于常规 PI 型负荷频率控制器。
Based on the wide area phasor measurement system (WAPMS), a decentralized load-frequency predictive control model for large-scale wind farm/cluster interconnected power grids based on model predictive control (MPC) is established. The typical two-zone load frequency control model is taken as an example to consider the different wind power permeability. The simulation results show that the proposed decentralized load frequency control model based on model predictive control can not only effectively track the random fluctuation of wind power output, but also maintain the change of system frequency and inter-area exchange power in a small range, and the control effect is significantly better than that of conventional PI load frequency controller. (2019-08-17, PDF, 988KB, 下载13次)
以电磁辐射测试系统为对象进行了深入研究，在虚拟暗室技术的基础上
建立了电磁辐射测试系统的模型，并利用自适应滤波算法和功率谱估计对系统模
型进行了分析。在传统算法的基础上通过改进提出了一种新的混合自适应算法，
并对其进行了仿真实验的验证。同时利用测量仪器硬件知识对电磁辐射测试系统
进行了物理平台的搭建，并利用虚拟暗室技术对系统的软件平台进行了开发。最
后，通过现场测试试验验证了系统的可行性，并对改进后的算法进行了实际验证。
The electromagnetic radiation testing system is studied in depth. On the basis of virtual dark room technology, the model of electromagnetic radiation testing system is set up, and the system model is analyzed by adaptive filtering algorithm and power spectrum estimation. Based on the traditional algorithm, a new hybrid adaptive algorithm is proposed and verified by simulation. At the same time, the physical platform of the electromagnetic radiation testing system is built by using the hardware knowledge of the measuring instrument, and the software platform of the system is developed by using the virtual dark room technology. Finally, the feasibility of the system is verified by field test, and the improved algorithm is verified in practice. (2018-08-09, PDF, 2720KB, 下载0次)
提出了“工况块”的概念, 用工况的平均行驶车速和行驶距离作为特
征参数, 将统计的理论工况进行分类, 通过模糊控制器, 对实际工况进行模糊分析, 将其划
为对应的某一类. 为更准确地反映行驶工况, 还提出以时间、距离、最大车速等10个参数
作为工况的相关特性参数, 用聚类分析的方法对车辆行驶工况的类别进行了更细致的分
析和辨识.
The concept of "working condition block" is put forward, and the average driving speed and driving distance of working condition are used as special
The parameters are classified according to the theoretical condition of the statistics, and the fuzzy controller is used to analyze the actual working conditions
In order to accurately reflect the driving conditions, 10 parameters, such as time, distance and maximum speed, are proposed
As the relevant characteristic parameters of the working condition, the classification of vehicle driving conditions is divided by the method of cluster analysis
Analysis and identification. (2017-07-05, PDF, 258KB, 下载22次)