LTE-A异构网中小区间干扰抑制算法研究

发布时间：2018-03-21 11:16

本文选题：异构网　切入点：小区间干扰消除　出处：《西安电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：异构网技术作为LTE-A系统的重要候选技术之一,能够很好地实现小区边缘覆盖以及数据的高速传输。但是在小区内部署低功率节点使无线通信系统性能增加的同时也会带来一些弊端。由于系统结构趋于复杂,将会产生很多不同类型的小区,使得处于小区边缘的用户将会受到更为复杂的干扰。随着异构网技术的应用,如何抑制LTE-A异构网中小区间干扰成为了目前移动通信领域的一个重要研究课题。本论文针对LTE-A异构网中小区间干扰抑制技术展开了以下研究:1、研究了LTE-A系统及其关键技术,对异构网中的小区间干扰场景进行了分析。然后详细研究了3GPP提供的三种常用的小区间干扰抑制方案:小区间干扰随机化、小区间干扰协调以及小区间干扰消除,为后面的研究提供了理论基础。2、实现了LTE-A异构网系统仿真平台的搭建,在研究频率复用技术与协作波束赋形技术的基础上,提出了一种基于频率复用及协作波束赋形相结合的小区间干扰抑制方案。该方案实现简单,充分利用了这两种算法较强的小区间干扰抑制能力以及两者间良好的兼容性,相对传统方案能够提升小区用户的平均吞吐量。3、针对传统的基于协作调度/协作波束赋形(Coordinated Scheduling/Coordinated Beamforming,CS/CB)方案中资源调度算法复杂度随着协作区域用户数的提升急剧增加的问题,提出了一种基于用户分类的协作调度/协作波束赋形方案,该方案能够大大降低系统复杂度的同时,保证了小区吞吐量损失率在可接受的范围内。
[Abstract]:Heterogeneous network technology is one of the important candidate technologies for LTE-A systems. It can achieve cell edge coverage and high speed data transmission. However, the performance of wireless communication system can be improved by deploying low power nodes in the cell. Because the system structure tends to be complex, There will be many different types of cells, which will make the users at the edge of the cell more complicated. With the application of heterogeneous network technology, How to suppress the small and medium interval interference in LTE-A heterogeneous networks has become an important research topic in the field of mobile communication. This paper has carried out the following research on the LTE-A heterogeneous network small and medium interval interference suppression technology: 1, studied the LTE-A system and its key technologies. The inter-cell interference scenarios in heterogeneous networks are analyzed. Then three common inter-cell interference suppression schemes provided by 3GPP are studied in detail: randomization of inter-cell interference, inter-cell interference coordination and inter-cell interference cancellation. It provides a theoretical basis for the following research. 2, realizes the LTE-A heterogeneous network system simulation platform, based on the study of frequency multiplexing technology and cooperative beamforming technology, A new inter-cell interference suppression scheme based on frequency multiplexing and cooperative beamforming is proposed. The scheme is simple and makes full use of the strong inter-cell interference suppression ability of the two algorithms and the good compatibility between the two algorithms. Compared with the traditional scheme, the average throughput of cell users can be improved by. 3. Aiming at the problem that the complexity of resource scheduling algorithm increases sharply with the increase of the number of users in the cooperative area, the complexity of the resource scheduling algorithm in the traditional cooperative scheduling / cooperative beamforming scheme is increased sharply. A cooperative scheduling / cooperative beamforming scheme based on user classification is proposed. This scheme can greatly reduce the system complexity and ensure that the cell throughput loss rate is within an acceptable range.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5;TN972

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