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通信工程类毕业设计论文模板(节选)
作者:admin   发布于:2014-03-09 18:37    文字:【】【】【
 
        移动通信多系统接入平台的研究
 
摘要
 
    随着科技的进步,人类对通信的要求越来越高。目前,中国移动通信领域有多种通信制式共存,多运营商竞争的格局,势必诞生能兼容各制式网络的覆盖系统。在传统的室内覆盖解决方案中,合路设备只针对某个运营商的几个制式进行合路。这样,就会造成通信制式覆盖不完全,或者在同一小区或一个建筑中会出现多个分布系统,重复投资、重复建设,建设成本居高不下。
    针对目前中国移动通信室内覆盖的现状,本文研究的的多系统合路平台与以往的合成平台最大的突破在于公网全制式接入。因此各种信号可以利用多系统合成平台接入到同一套室内分布系统。这使得大型建筑中的室内覆盖建设成本大大降低。本文对多种通信信号在空间中产生的杂散干扰、互调干扰、阻塞干扰进行分析,从而计算出,合路这些信号所需要的合路设备提供的隔离度要求。根据这些要求,设计出来的合路设备才能保证各种信号在合路后能够正常的工作。
 
关键词: 移动通信   室内覆盖   多系统合成平台   隔离度
 
 
 
 
 
 
 
ABSTRACT
 
With the progress in technology, the demand on communications between human beings becomes higher and higher. At present, a wide rang of communication systems co-exit in China mobile communication system, multi-operator competition pattern, is bound to the birth of compatible with each system of network coverage system.  In the traditional in door coverage solution, the closed circuit equipment only aims at some operator’several service patterns to carry on the closed circuit. Thus, it will bring the incomplete coverage on the correspondence service pattern, or caus many distribution systems  in  the  identical  plot and  buildings, the redundant investment, the building redundant project, the higher construction cost and so on.
According to the current situation of China wireless communication in-building coverage, this paper studies the POI which the major characteristic of this platform is that it contains all the frequency bands of public communication. Therefore a variety of signal systems can take use of POI access to the same set of indoor distribution system. This makes the costs of indoor coverage in large-scale construction much lower. In this paper, we analyze a variety of communication signals which are generated in the space of spurious interference, intermodulation interference and congestion interference, in order to estimate, or the way these signals are combined by way of equipment needed to provide the isolation requirements. In response to these requests,the designed combiner targets to ensure the combined signal to normal after the road work.
 
Keywords:      Mobile Communication        In-building Coverage    
               POI (point of interface)        Isolation
 
 

目 录
第一章  绪论................................................ 1
1.1  移动通信技术介绍........................................... 1
1.1.1  多运营商格局......................................... 1
1.1.2  多制式网络........................................... 1
1.2  集约化建设的必要性......................................... 2
1.2.1  室内覆盖系统概述..................................... 3
1.2.2  室内分布系统主要构成................................. 3
1.2.3  传统无源覆盖和使用多系统合路平台覆盖的差别........... 4
第二章  多系统合路平台概述................................... 7
2.1  无源器件概述............................................... 7
2.2  合路设备在实际中的应用..................................... 7
第三章  多系统合路覆盖可行性分析............................ 11
3.1  多系统合路平台POI........................................ 11
3.1.1  POI 简介............................................ 11
3.1.2  POI功能及特点....................................... 11
3.2  多系统共存的分析.......................................... 12
3.2.1  频率干扰原理分析.................................... 12
3.2.2  无线通信系统频率干扰情形............................ 13
3.2.3  移动通信系统干扰.................................... 14
3.3  多系统共址干扰分析........................................ 15
3.3.1  干扰分类............................................ 15
3.3.2  杂散干扰分析........................................ 16
3.3.3  互调干扰分析........................................ 18
3.3.4  阻塞干扰分析........................................ 19
第四章  多系统合路解决方案.................................. 23
4.1  室内收发天线隔离度分析.................................... 23
4.1.1  收发天线隔离度...................................... 23
4.1.2  天线间隔离度要求.................................... 24

4.2  隔离度解决方案............................................ 25
4.3  天馈功率分配解决方案...................................... 27
第五章  多网覆盖典型工程应用举例............................ 31
5.1  工程概况.................................................. 31
5.2  覆盖范围及各项指标........................................ 31
第六章  结论............................................... 35
致谢....................................................... 37
参考文献................................................... 39


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