LTE-Advanced载波聚合技术与标准进展

LTE-Advanced是基于LTE的增强与演进,载波聚合技术是LTE-Advanced的关键技术之一。文章介绍了LTE-Advanced载波聚合技术的背景、技术构成及在3GPP中的标准化进程,并总结了该技术的下一步研究重点与发展方向。     

载波聚合技术对LTE-Advanced空口协议带来的挑战

载波聚合技术是LTE-Advanced标准的一个重要特性,也是实现LTE-Advanced系统百兆带宽运行的最关键技术,但其也对LTE-Advanced空口协议带来了诸多挑战。为了支持载波聚合技术,LTE-Advanced需要对此前的LTE空口协议进行多方面的增强。本文从成员载波分类、上行时钟提前、系统信息处理、无线链路失败处理等方面介绍了目前3GPP正在讨论的针对载波聚合的空口协议增强方案,包括已经形成的结论以及后续还需研究的问题。     

LTE-Advanced关键技术演进趋势

文章对LTE-Advanced的定位及需求进行了分析,对LTE-Advanced技术和网络演进趋势进行了研究,指出LTE-Advanced的重点工作方向将放在RRM技术和网络架构优化方面。     

LTE-Advanced关键技术研究

文章从当今热门的移动4G网络通信的发展现状入手，引出4G网络通信中的LTE-Advanced的基本概念，进而简单介绍了LTE-Advanced的主要技术参数，然后详细分析并研究了LTE-Advanced技术中的的几项关键技术并进行了深入的分析研究，最后在分析研究的基础上对LTE-Advanced的发展前景作出展望。     

第四代移动通信关键技术研究

介绍了第四代移动通信技术——LTE-Advanced(包括TD-LTE-Advanced及LTE-Advanced FDD)产生的背景,重点阐述了LTE-Advanced系统中载波聚合技术、增强MIMO(Multi-input Multi-output多输入多输出)天线技术、中继技术、异构网络等关键技术的特点及相应的研究内容。     

LTE-Advanced标准进展及演进策略分析

LTE-Advanced作为4G的候选技术方案,是在LTE基础上的进一步增强。本文对3GPP LTE-Advanced中各关键技术标准化的进展及热点问题进行讨论,并且对3G移动通信技术向LTE/LTE-Advanced未来移动通信技术的演进策略进行分析。     

LTE-Advanced新技术及终端一致性测试国际标准化最新进展

为了保持移动通信标准的技术优势并提高市场竞争力,3GPP组织开始了LTE的演进系统——LTE-Advanced系统的研究和标准制定。LTE-Advanced标准于2010年6月通过ITU的评估,正式成为IMT-Advanced主要技术之一,并于2011年3月在3GPP完成R10版本的标准制定。本文介绍了LTEAdvanced新技术,并重点对LTE-Advanced终端一致性测试在3GPP组织最新的标准化进展进行了介绍。     

LTE/LTE-Advanced R10标准化进展

介绍了LTE/LTE-Advanced标准发展概况,详细分析了近期LTE-Advanced R10版本技术标准化情况及可行性阶段技术的进展,同时展望了LTE-Advanced R11版本的发展方向,最后分析了TD-LTE现网测试情况。     

LTE-Advanced载波聚合工程建设策略研究

LTE-Advanced载波聚合工程的建设是当前通信行业最重要的信息化建设之一,并且在2014年中国移动已经率先开展LTE-Advanced载波聚合工程的建设,不仅对其制定了符合实际的总体设计,并对去部署方案进行了详细的规划,主要部署在人员集中的区域,如城市的核心商圈,各大交通枢纽,以及学校医院等地。载波聚合（CA）是LTE-Advanced系统的关键技术,这种技术可以满足该系统对于带宽资源的需求,对于LTE-Advanced载波聚合工程的建设,各大通信公司都是在LTE网络的基础上增加载波聚合功能,本对LTE-Advanced载波聚合工程的建设进行了探讨研究,并对其建设方案进行优化。     

LTE-Advanced中继系统基于辅助载波的协作切换算法

切换是移动性管理的重要组成部分.在LTE-Advanced系统中,由于中继、载波聚合等新技术的引入,给系统的切换机制提出了更高的要求和挑战.通过对传统LTE-Advanced系统和LTE-Advanced中继系统切换过程的分析,提出了LTE-Advanced中继系统基于辅助载波的协作切换算法.该算法利用低频载波传播范围广、高频载波资源相对较多的优势,并结合中继技术和载波聚合技术,达到了降低切换中断概率、提高系统吞吐量的目的.     

浅议IT网管系统的建设

基于IT网管系统的组织架构及功能划分，结合实际工作的经验，进行了相应的技术分析，进而对建设IT网管系统的几个技术难点进行了探讨，提出了相应的技术建议。     

Assessment on IT-based Technical Innovation of the Subordinate Company of the Corporation

Information technology （IT） is one of the most important means by which companies can win an advantaged position in drastically competed market. It has a positive effect on the advancement of the corporation＇s technical innovation. The application of IT can promote the communication among subordinates of a corporation or group, reduce explicit boundaries of the subordinates, and boost the ripple effect of technical innovation of the subordinates. Not only does any subordinate company within a corporation need to assess both technical and economic benefits brought to the corporation itself by technical innovation, but also it should thoroughly analyze how the ripple effect of technical innovation among subordinate companies plays a significant role in the boosting value of the corporation as a whole. In this paper, a scientific approach to assessing technical innovation of a subordinate company is proposed through analyzing the ripple effect of IT-based technical innovation on subordinate companies.     

EPON最新标准与技术进展(本期优秀论文)

介绍了EPON标准和技术的最新进展情况,重点分析了三种EPON的技术发展方向:10GEPON标准进展情况及主要技术特点、2G EPON标准进展及主要技术特点以及WDM EPON的技术特点.通过对EPON技术发展的分析,得出今后FTTX发展的趋势.     

对PCB行业技术论文的一些看法

作者概述自己对我国目前PCB兴业技术论文的看法,认为技术论文数量很多,总体水平需提高,包括技术内容、文章结构和学术风气.     

300mm硅单晶的生长技术

讨论了 30 0 mm硅单晶的工艺控制 ,分析了拉晶工艺、热屏及磁场对晶体质量的影响。合理的工艺参数是拉制无位错单晶的前提 ,热屏和磁场的应用有效地控制了晶体的氧含量和微缺陷     

300mm硅单晶的生长技术

讨论了300mm硅单晶的工艺控制,分析了拉晶工艺、热屏及磁场对晶体质量的影响。合理的工艺参数是拉制无位错单晶的前提,热屏和磁场的应用有效地控制了晶体的氧含量和微缺陷。     

5G环境下无人机高清视频数据实时传输组网方式研究

第五代移动通信技术为无人机赋予实时超高清图传能力,将催生无人机超高清视频实时传输服务,颠覆4G时代的思维方式和工作习惯,重塑行业流程和作业规范。河南浩宇空间在分析现有技术实现方案存在问题的基础上,利用市场上常见的CPE设备进行实际组网测试验证,在5G无人机高清视频数据实时传输组网技术层面做了大量测试工作,在现有技术设备条件下探讨了5G无人机高清视频实时传输的技术可行性,提出了无人机高清视频数据实时传输的可行研究方向。     

Motivating Technical Visionaries in Large American Companies

Many studies have been performed previously to investigate different theories of motivation and, more specifically, how to motivate technical professionals. The problem with these studies is that they consider groups of scientists, engineers, or technical professionals as a whole or "on average," despite the fact that not all technical professionals are the same. One particular set of individuals - technical visionaries - is a key driver of technical innovation and new product development within technology- intensive organizations. While the literature intimates the existence of these highly innovative individuals in industry, technical visionaries have not been investigated in a systematic manner. Through in-depth interviews with 24 technical visionaries, identified as such by managers in their Arms, this study identifies what methods are used in industry to motivate these exceptional individuals, what works and what does not. Our results show that technical visionaries are first and foremost motivated by internal factors, including the desire to see their ideas become a reality, and enjoying working "on-the-edge," and innovating. While many aspects of standard incentives and reward systems used to motivate technical professionals in general are also motivating for technical visionaries, these results indicate that they are motivated by additional factors not generally discussed in the literature.     

透过专利看微处理器的技术发展（五）——浅谈主要专利权人技术发展

本文在调研大量专利文献的基础上,通过跟踪微处理器的主要专利权人IBM、Intel和AMD在中国的微处理器专利,研究其不同时期技术重点,明确其技术发展历程。同时从技术分布、典型芯片结构对比、专利申请增长率以及法律状态几个方面分析了微处理器的专利技术演进,并分析近期专利技术的特征,以及技术要素的变化,分析各厂商的专利技术现状,预测发展方向,为新产品开发计划提供线索。     

Technical writing and computer programming

It is argued that technical writing and computer programming are based on similar principles, perhaps because both are mechanisms for efficiently organizing and communicating complex information. Both technical writing and programming are multistep processes involving planning, drafting, and revising. Moreover, six key aspects of computer programming (modularity, modifiability, user interface, failsafe presentation, style, and debugging) have analogs among such technical writing principles and practices as report sectioning, audience analysis and adaptation, and editing. These similarities are discussed and a course that builds on these likenesses to teach technical writing to programming students is described