基于TD-LTE室内分布系统改造的有源天线的研究与设计

发布时间：2018-06-28 18:46

本文选题：TD-LTE + MIMO技术　；参考：《武汉邮电科学研究院》2014年硕士论文

【摘要】：随着移动通信技术的发展，移动通信的重点从语音业务模式逐步转向数据业务传输。而随着LTE时代的即将到来，移动通信速率将得到极大的提升，视频、游戏、流媒体等高速率的分组交换业务将成为人们日常使用手机的主要业务。有数据显示，移动通信网络的业务量有70%发生在室内，特别是对传输速率和稳定性要求较高的分组数据业务。所以在引入TD-LTE网络后，室内分布系统建设是运营商的工作重点。为了保护运营商的前期投资，TD-LTE网络的室内分布建设要尽量使用现有室内分布系统进行改造。 TD-LTE系统使用的一个重要技术是多天线技术，即MIMO技术。而现有的室分系统为单馈线系统，无法实现TD-LTE系统的MIMO特性，对TD-LTE系统的容量和传输速率都有很大影响。若要在现有室分系统上改造实现TD-LTE系统的MIMO特性，最常规的方法是新建一路馈线系统，实现TD-LTE系统的双路覆盖。这种方案的缺点是改造成本较高、施工周期较长和物业协调的难度较大。本文提出了一种通过有源天线对现有的单馈线室内分布系统改造的方法，并详细介绍了有源天线的功能和设计方法。单缆MIMO有源天线分布系统是在单根馈缆上通过变频方式实现TD-LTE系统MIMO功能的全新室内分布系统，传输TD-LTE信号同时还兼容其他制式信号的透传。通过在现有的单路室内分布系统的基础上加装有源天线的近远端，使单路室内分布系统可以在引入TD-LTE网络后实现其MIMO特性。这种方式的改造周期短，改造难度较小，，成本较低，物业协调的难度较小。
[Abstract]:With the development of mobile communication technology, the emphasis of mobile communication is gradually shifting from voice service mode to data service transmission. With the coming of LTE era, mobile communication rate will be greatly improved, video, game, streaming media and other high-speed packet switching services will become the main business of people using mobile phones. Some data show that 70% of the traffic in mobile communication network occurs indoors, especially packet data services which require high transmission rate and stability. So after the introduction of TD-LTE network, the construction of indoor distribution system is the focus of operators. In order to protect the upfront investment of operators in the indoor distribution construction of TD-LTE networks, the existing indoor distribution systems should be reformed as far as possible. One of the most important technologies used in TD-LTE systems is multi-antenna technology, that is, MIMO technology. However, the existing system is a single-fed system, which can not realize the MIMO characteristics of TD-LTE system, which has great influence on the capacity and transmission rate of TD-LTE system. In order to improve the MIMO performance of TD-LTE system on the existing system, the most common method is to create a new one way feeder system to realize the dual coverage of TD-LTE system. The disadvantage of this scheme is that the cost of reconstruction is high, the construction period is longer and the coordination of property is difficult. In this paper, a method of transforming the existing single-fed indoor distribution system through active antenna is proposed, and the function and design method of active antenna are introduced in detail. Single cable MIMO active antenna distribution system is a new indoor distribution system which can realize MIMO function of TD-LTE system by frequency conversion on a single feed cable. The transmission of TD-LTE signal is compatible with the transmission of other standard signals at the same time. Based on the existing single-channel indoor distribution system, the MIMO characteristics of the single-channel indoor distribution system can be realized with the introduction of TD-LTE network by adding the near and far end of the active antenna. This type of transformation cycle is short, transformation difficulty is small, cost is lower, the difficulty of property coordination is small.
【学位授予单位】：武汉邮电科学研究院
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN828.6

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