基于TDD-LTE干扰检测及规避的分析研究

发布时间：2018-05-05 00:31

本文选题：系统内干扰 + 系统外干扰　；参考：《吉林大学》2017年硕士论文

【摘要】：无线通信业务的飞速发展,数据通信业务的爆发式增长,对无线网络覆盖及其容量提出了更高要求。虽然各大运营商已经规划了各种无线网络,小区的覆盖范围也不断减小,但网络底噪不断抬升仍然使干扰问题日益突出,这使得用户体验不佳,且增加了运营商构建、优化网络的负担。因此,提高LTE网络的运营质量,给用户提供一张纯净的移动网络,成为目前的研究热点。干扰排查和规避是极其复杂的,如何解决干扰也一直困扰着各大运营商。本文在对近年来干扰相关领域中研究成果进行深入研究分析的基础上,利用现网排查中获得的经验,对干扰排查及降低干扰措施进行了研究。对于系统内干扰,结合工参,寻找干扰源,对基站逐个验证,对齐时钟,使之恢复正常。对于系统外干扰,借助频谱仪排查,进行干扰定位,之后将干扰进行分类,分别进行抑制。通过更换天线或跳线,将高段频点退频等措施,使得重度干扰小区数由占总数的8.9%得到有效降低。对于频段内干扰,通过进行TDD-LTE软件升级、调整天面或加装抗滤波器等措施,实现干扰降低。本文的研究成果可帮助一线工作人员,更快、更准确、更方便地掌握干扰排查及其规避方案。对后续LTE网络干扰的更深层次研究和发展具有重要的指导意义。
[Abstract]:With the rapid development of wireless communication services and the explosive growth of data communication services, higher requirements for wireless network coverage and capacity are put forward. Although the major operators have planned all kinds of wireless networks and the coverage of the residential area is also decreasing, the problem of interference is still becoming increasingly prominent because of the rising noise in the network, which makes the user experience poor and increases the construction of the operators. The burden of optimizing the network. Therefore, improving the operation quality of LTE network and providing users with a pure mobile network has become a research hotspot. Interference detection and evasion is extremely complex, how to solve the interference has been puzzling the major operators. On the basis of deeply studying and analyzing the research results in the field of interference in recent years, this paper makes use of the experience gained in the current network search to study the interference detection and the measures to reduce the interference. For intra-system interference, we can find the interference source, verify the base station one by one, align the clock, and make it return to normal. For the interference out of the system, the interference location is carried out by means of spectrometer, and then the interference is classified and suppressed separately. By replacing the antenna or jumper, the frequency of the high frequency band can be reduced effectively from 8.9% of the total. For the interference in the frequency band, the interference can be reduced by upgrading the TDD-LTE software, adjusting the sky surface or installing anti-filter. The research results of this paper can help front-line staff to grasp interference detection and avoidance scheme more quickly, more accurately and more conveniently. It has important guiding significance for the further research and development of subsequent LTE network interference.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5

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