毕业设计（论文）-GSM室内分布系统设计.doc

南京信息职业技术学院 毕业设计论文 作者 学号 50913X32 系部 通信学院 专业 通信技术（光纤通信） 题目 GSM室内分布系统设计 指导教师 评阅教师 完成时间： 2012年5月15日 毕业设计（论文）中文摘要 题目：GSM室内分布系统设计 摘要：随着城市移动用户的飞速发展以及高层建筑越来越多，话务密度和覆盖要求也不断上升。这些建筑物规模大、质量好，对移动电话信号有很强的屏蔽作用。在大型建筑物的低层、地下停车场等环境下，移动通信信号弱，手机无法正常使用，形成移动通信的盲区和阴影区，在中间楼层，由于周围不同基站信号的重叠，来自形成了乒乓效应，手机频繁切换，甚至掉话，严重影响了手机店的正常使用；在高层，由于受基站天线高度限制，无法正常覆盖，也是移动通信的盲区。另外，在有些建筑物内，虽然手机能够正常通话，但是用户密度大，基站信道拥挤，手机上线困难,网络覆盖系统就是在这种背景之下产生的。 关键词：移动通信，室内分布覆盖，蜂窝，系统容量  毕业设计（论文）英文摘要 Title: GSM indoor distribution system design Abstract: With the rapid development of city mobile users as well as more and more high-rise buildings, traffic density and coverage requirements are also rising. These buildings are in large scale, good quality, to the mobile phone signal has the very strong shielding effect. In large buildings in the lower layer, such as underground parking environment of mobile communication, mobile phone signal is weak, cannot use normally, formation of mobile communication blind area and in the shadows, in intermediate floor, because around the different base station signal overlap, from the formation of the ping-pong effect, frequent switching of mobile phone, and even drop, seriously affecting the mobile phone shop the normal use; at the top, due to base station antenna height restrictions, can not cover, but also the blind area of mobile communication. In addition, in some buildings, while the mobile phone to the normal call, but the user density, base station channel congestion, difficulty of mobile phone line，network coverage system is under this kind of background generation. Keywords: mobile communication; indoor coverage distribution; cellular network; system capacity