宽带无线信道仿真技术研究及仿真仪设计

发布时间：2018-04-05 16:10

本文选题：宽带无线信道仿真　切入点：MIMO　出处：《北京交通大学》2014年硕士论文

【摘要】：摘要：随着当前移动通信系统宽带化以及大规模MIMO通信技术成为下一代移动通信系统研究的热点,宽带无线信道仿真技术需求日益迫切。无线信道仿真是移动通信理论和关键技术研究、通信系统设计、无线网络规划、设备研制及工程验收的重要工具,也是无线信道建模研究与应用之间的重要桥梁。目前,无线信道仿真主要以纯软件仿真为主,该方法实时性较差,仿真环境过于理想,无法提供与物理设备的接口；而基于硬件的无线信道仿真技术被少数国外公司垄断,灵活性较差,难以满足未来无线信道仿真的需求。针对这种情况,本文利用并行计算技术对基于硬件的无线信道仿真系统进行了优化设计,研制了基于半文件存储方法的宽带无线信道仿真仪,并通过了实验室验证测试。本文主要工作及创新点包括以下几个方面：一、针对宽带MIMO信道仿真,采用迭代处理、并行处理、软硬件联合处理等技术,提出了基于半文件存储的信道仿真方法,有效地降低了仿真复杂度,提升了仿真速度,满足了高速环境下高精度实时仿真的需求。二、基于本文提出的信道仿真方法,在美国国家仪器(NI)公司的软件无线电平台上研制了支持两通道独立仿真和2×2MIMO仿真的宽带无线信道仿真仪,满足了当前LTE系统半实物仿真的需求。三、搭建了LTE半实物仿真系统,对TD-LTE系统高速环境下的链路性能进行了仿真测试,分析了EVM、BLER以及吞吐量等性能指标,对研制的无线信道仿真仪的性能进行了验证。
[Abstract]:Absrtact: with the current broadband mobile communication system and large-scale MIMO communication technology become the focus of the next generation of mobile communication systems, broadband wireless channel simulation technology needs more and more urgent.Wireless channel simulation is an important tool for mobile communication theory and key technology research, communication system design, wireless network planning, equipment development and engineering acceptance. It is also an important bridge between wireless channel modeling research and application.At present, the wireless channel simulation is mainly based on pure software simulation. The simulation environment is too ideal to provide the interface with physical equipment, and the hardware-based wireless channel simulation technology is monopolized by a few foreign companies.Because of its poor flexibility, it is difficult to meet the needs of future wireless channel simulation.In this paper, the hardware based wireless channel simulation system is optimized by using parallel computing technology. A wideband wireless channel simulator based on half-file storage method is developed and tested in the laboratory.The main work and innovation of this paper include the following aspects:Firstly, for broadband MIMO channel simulation, iterative processing, parallel processing, hardware / software joint processing and other techniques are used to propose a channel simulation method based on half-file storage, which effectively reduces the complexity of simulation and improves the speed of simulation.It meets the demand of high precision real-time simulation in high speed environment.Secondly, based on the channel simulation method proposed in this paper, a wideband wireless channel simulator supporting two-channel independent simulation and 2 脳 2MIMO simulation is developed on the software radio platform of National instrument Company.It meets the demand of the current LTE system hardware-in-the-loop simulation.Thirdly, the LTE hardware-in-the-loop simulation system is built, and the link performance of the TD-LTE system under the high-speed environment is tested. The performance indexes of the EVMM-BLER and the throughput are analyzed, and the performance of the developed wireless channel simulator is verified.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5

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