LTE系统物理层关键技术研究

发布时间：2018-06-06 14:51

本文选题：LTE + OFDM　；参考：《北京理工大学》2014年硕士论文

【摘要】：由于全球微波接入互操作（World interoperability for MicrowaveAccess,WIMAX）、WIFI技术的迅猛崛起，为了应对它们所带来的市场挑战，维持在移动通信行业中的竞争力，2004年底，国际化标准组织3GPP启动了长期演进（Long Term Evolution，LTE）计划，以实现3G技术向超3G移动通信系统和4G的平滑过渡。本文以LTE物理层协议为基础，通过搭建LTE下行物理层链路仿真平台，对其物理层关键技术进行深入的研究与分析。本文首先介绍了LTE技术的背景、演进目标和市场发展现状，阐述了LTE物理层基本概念及下行物理层关键技术OFDM、调制技术的基本原理，，然后搭建LTE下行物理层仿真平台，利用此平台实现对不同调制方式、不同UE速度这两种情况下的仿真分析，接着介绍了一种基于滤波器组的多载波技术（FBMC），由于FBMC具有带外泄露较小，不需添加循环前缀等优点，被认为是可以替代OFDM的一种技术。文中对FBMC系统的基本原理进行了详细的阐述，包括影响系统性能的关键因素——原型滤波器的设计、系统实现结构及OQAM调制技术的特点，然后通过仿真分析了FBMC相较于OFDM技术的一些优势。最后介绍了LTE系统的硬件平台——T6280通用无线通信测试仪，本测试仪可以支持各类通信标准，可高效实现信令、非信令、快速测试等多场景多模式应用。接着介绍了作者在此测试仪开发过程中所负责的GPIB驱动的开发，文中对GPIB接口的基本概念及接口功能进行了简单的说明，然后通过对GPIB专用接口芯片TNT5002的寄存器的描述了解如何实现GPIB接口的功能，最后对GPIB驱动进行软件设计实现其功能。
[Abstract]:Due to the rapid rise of WIMAX WIFI technology in the global microwave access interoperability, in order to meet the market challenges they pose, and to maintain competitiveness in the mobile communications industry in late 2004, the International Standards Organization (3GPP) launched the long term long Term Evolution Project. In order to realize the smooth transition of 3G technology to ultra-3G mobile communication system and 4G. Based on the LTE physical layer protocol, the key technologies of LTE downlink physical layer are deeply studied and analyzed by building a LTE downlink simulation platform. This paper first introduces the background, evolution goal and market development status of LTE technology, expounds the basic concept of LTE physical layer, the key technology of downlink physical layer, and the basic principle of modulation technology, then builds the LTE downlink physical layer simulation platform. This platform is used to simulate and analyze different modulation modes and different UE speeds. Then, a multi-carrier technology based on filter banks is introduced. Because FBMC has the advantages of small out-of-band leakage and no need to add cyclic prefix. It is considered to be a technology that can replace OFDM. In this paper, the basic principle of FBMC system is described in detail, including the design of prototype filter, the structure of system implementation and the characteristics of OQAM modulation technology, which are the key factors affecting the performance of the system. Then some advantages of FBMC compared with OFDM technology are analyzed by simulation. Finally, the hardware platform of LTE system, T6280 universal wireless communication tester, is introduced. This tester can support all kinds of communication standards, and can efficiently implement multi-scene and multi-mode applications such as signaling, non-signaling, fast testing and so on. Then it introduces the development of GPIB driver which the author is responsible for in the development process of the tester. The basic concept and interface function of GPIB interface are briefly explained in this paper. Then, by describing the register of TNT5002, a special interface chip of GPIB, how to realize the function of GPIB interface is understood. Finally, the software design of GPIB driver is carried out to realize its function.
【学位授予单位】：北京理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5

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