LTE系统与DTMB系统干扰共存研究
发布时间：2018-07-28 16:01
【摘要】：LTE (Long Term Evolution,长期演进)是3GPP制定的通用移动通信系统技术标准的长期演进。2013年10月我国工业和信息化部公布了2500MHz～2690MHz频段为TDD方式的IMT系统工作频谱,同时明确了在1800MHz到2100MHz频段中未分配的两个60MHz用于FDD频段,2013年12月我国工业和信息化部正式向三大运营商发布了4G牌照,频率划分和运营牌照的发放将使得未来一段时间我国的LTE系统部署迎来一轮高潮。 2006年我国推出了具有自主知识产权的地面数字电视标准DTMB (Digital Television Terrestrial Multimedia Broadcasting,数字电视地面广播),推动我国地面广播电视由模拟电视向数字电视演进。得益于数字电视采用的一系列新技术,DTMB系统将会空出部分频谱资源可供重新分配使用。 在LTE产业的发展过程中始终面临频谱资源不足的问题,特别是缺少有利于网络覆盖的低频段频谱。DTMB系统所在的VHF和UHF频段相关的优质频谱受到越来越多的关注,LTE系统对与DTMB系统相关频谱的需求使得两个系统间的干扰共存问题具有重要价值和现实意义。 本文的主要研究工作围绕LTE系统和DTMB系统的干扰共存问题展开,研究过程中首先采用确定性分析的方法进行LTE系统和DTMB系统间的共存研究,给出了分析过程中使用的系统建模过程,依据相关的系统保护原则确定了当系统处于邻频共存时的干扰情况和所需隔离程度。 在确定性分析的基础上利用基于蒙特卡洛原理构建的系统级仿真,给出了农村和城市两种场景下的系统干扰共存仿真结果。在此基础上针对应用认知无线电技术利用DTMB系统频谱空洞的问题,提出了结合地理位置数据库应用GA算法利用空闲信道的方法,相关的仿真结果表明采用此方法可以改善系统间隔离要求,从而提高频谱利用效率。本论文相关的研究结果可为未来LTE系统部署提供相关的参考依据。
[Abstract]:The long-term evolution of LTE (Long Term Evolution,) is the long-term evolution of the general mobile communication system technical standard established by 3GPP. In October 2013, China's Ministry of Industry and Information announced the working spectrum of IMT system with 2500MHz~2690MHz band as TDD mode. At the same time, it is clear that two 60MHz unallocated in the 1800MHz to 2100MHz band are used in the FDD band. In December 2013, the Ministry of Industry and Information Technology officially issued 4G licenses to the three major operators. The frequency division and the issuance of operating license will make the deployment of LTE system in our country a climax in the future. In 2006, China launched the terrestrial digital television standard DTMB (Digital Television Terrestrial Multimedia Broadcasting, which has its own intellectual property rights. Digital TV terrestrial broadcasting), promote the evolution of terrestrial radio and television from analog television to digital television. Thanks to a range of new technologies used in digital television, DTMB systems will free up some spectrum resources for redistribution. In the process of development of LTE industry, it is always faced with the problem of insufficient spectrum resources. In particular, the lack of low-frequency spectrum. DTMB system is in favor of network coverage. The high quality spectrum related to VHF and UHF band has attracted more and more attention. The demand of DTMB system for the spectrum related to DTMB system makes the interference between the two systems. Coexistence is of great value and practical significance. The main research work in this paper is focused on the coexistence of interference between LTE system and DTMB system. In the process of research, the coexistence between LTE system and DTMB system is studied by deterministic analysis method. The modeling process of the system used in the analysis process is given, and the interference situation and the required isolation degree when the system is in the coexistence of adjacent frequency is determined according to the relevant system protection principles. On the basis of deterministic analysis, the system level simulation based on Monte Carlo principle is used, and the simulation results of system interference coexistence in rural and urban scenarios are given. To solve the problem of using spectrum voids in DTMB system by using cognitive radio technology, a method of using free channel using GA algorithm based on geographical location database is proposed. The simulation results show that the proposed method can improve the isolation requirement and the spectral efficiency. The results of this paper can provide reference for the future deployment of LTE system.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5
本文编号：2150816
[Abstract]:The long-term evolution of LTE (Long Term Evolution,) is the long-term evolution of the general mobile communication system technical standard established by 3GPP. In October 2013, China's Ministry of Industry and Information announced the working spectrum of IMT system with 2500MHz~2690MHz band as TDD mode. At the same time, it is clear that two 60MHz unallocated in the 1800MHz to 2100MHz band are used in the FDD band. In December 2013, the Ministry of Industry and Information Technology officially issued 4G licenses to the three major operators. The frequency division and the issuance of operating license will make the deployment of LTE system in our country a climax in the future. In 2006, China launched the terrestrial digital television standard DTMB (Digital Television Terrestrial Multimedia Broadcasting, which has its own intellectual property rights. Digital TV terrestrial broadcasting), promote the evolution of terrestrial radio and television from analog television to digital television. Thanks to a range of new technologies used in digital television, DTMB systems will free up some spectrum resources for redistribution. In the process of development of LTE industry, it is always faced with the problem of insufficient spectrum resources. In particular, the lack of low-frequency spectrum. DTMB system is in favor of network coverage. The high quality spectrum related to VHF and UHF band has attracted more and more attention. The demand of DTMB system for the spectrum related to DTMB system makes the interference between the two systems. Coexistence is of great value and practical significance. The main research work in this paper is focused on the coexistence of interference between LTE system and DTMB system. In the process of research, the coexistence between LTE system and DTMB system is studied by deterministic analysis method. The modeling process of the system used in the analysis process is given, and the interference situation and the required isolation degree when the system is in the coexistence of adjacent frequency is determined according to the relevant system protection principles. On the basis of deterministic analysis, the system level simulation based on Monte Carlo principle is used, and the simulation results of system interference coexistence in rural and urban scenarios are given. To solve the problem of using spectrum voids in DTMB system by using cognitive radio technology, a method of using free channel using GA algorithm based on geographical location database is proposed. The simulation results show that the proposed method can improve the isolation requirement and the spectral efficiency. The results of this paper can provide reference for the future deployment of LTE system.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5
【共引文献】
相关期刊论文 前4条
1 吴伯锦;;连续的电视图像相似性比对技术[J];中国广电技术文萃;2014年03期
2 朱家强;;模拟电视发射机数字化应考虑的几个方面[J];科技视界;2014年27期
3 范磊;;地县广播电视台向无线数字发射站传送节目的技术方案[J];中国有线电视;2014年03期
4 谭学琴;丁业兵;;基于IP的高清电视平台研究[J];湖北科技学院学报;2014年03期
相关硕士学位论文 前3条
1 黄刚林;基于SORA软件无线电平台DTMB接收技术的实现[D];武汉理工大学;2013年
2 王磊;DVB-T2中基于导频的同步方法研究[D];西安电子科技大学;2014年
3 王丽华;基于CAZAC序列的OFDM同步符号设计[D];西安电子科技大学;2014年
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