基于软件无线电平台的WCDMA物理层波形实现

发布时间：2018-12-30 20:49

【摘要】：现代移动无线通信技术发展越来越快,各种制式的通信标准也层出不穷。传统的通信设备只能适应于单一的通信体制,且开发周期长、投入成本高,无法满足现代社会的需求。软件无线电因其灵活性和开放性等特点,成为了未来无线电发展的方向。WCDMA是终端最丰富、用户数量最多的3G标准。本文所实现的WCDMA物理层波形,可以作为教学实验波形,为在软件无线电平台上开发更多的波形打下基础,具有较高的实际意义。本文所做的主要工作有:首先,阐述了软件无线电及WCDMA的发展现状,根据系统需求,设计了波形的总体框架并搭建了Simulink仿真模型,对波形的误码率等参数进行了仿真。同时划分了系统实现时需要的各个模块,对模块的实现原理进行了阐述,并给出了部分模块的设计参数。然后,按照概要设计中所设计框架,使用Xilinx公司推出的System Generator工具对波形进行了实际开发,同时对各个子模块的接口和实现方法进行了说明。对子模块进行功能验证无误后,将其串联起来,组成发射机和接收机。最后,将生成的FPGA文件下载到软件无线电平台上,通过实际测试验证了波形的功能,并对波形的部分指标进行了测验。实验证明,所设计的波形可以承载语音业务、文本聊天业务及文件传输业务,且传输速率符合波形设计预期。本文设计的WCDMA物理层波形在软件无线电平台上进行了工程验证,具有理论和实际价值,可以作为教学实验波形,为下一步在软件无线电平台上开发更多的波形提供了参考。
[Abstract]:Modern mobile wireless communication technology is developing more and more rapidly, and various communication standards are emerging in endlessly. Traditional communication equipment can only adapt to a single communication system, and the development cycle is long, the input cost is high, so it can not meet the needs of modern society. Because of its flexibility and openness, software radio has become the direction of future radio development. WCDMA is the 3G standard with the richest terminals and the largest number of subscribers. The WCDMA physical layer waveform realized in this paper can be used as the waveform of teaching experiment, which lays a foundation for the development of more waveforms on the platform of software radio, and has higher practical significance. The main work of this paper is as follows: firstly, the development status of software radio and WCDMA is described. According to the system requirement, the overall framework of waveform is designed, and the simulation model of Simulink is built, and the error rate of waveform is simulated. At the same time, every module is divided into several modules, the realization principle of the module is expounded, and the design parameters of some modules are given. Then, according to the framework designed in the outline design, the waveform is developed by using the System Generator tool developed by Xilinx Company, and the interface and implementation method of each sub-module are explained. After the function of the sub-module is verified correctly, it is connected in series to make up the transmitter and receiver. Finally, the generated FPGA file is downloaded to the software radio platform, and the function of the waveform is verified by the actual test, and some indexes of the waveform are tested. Experimental results show that the designed waveform can carry voice service, text chat service and file transfer service, and the transmission rate is in line with the waveform design expectation. The WCDMA physical layer waveform designed in this paper has been verified on the software radio platform, which has theoretical and practical value. It can be used as the teaching experimental waveform, and provides a reference for the next step to develop more waveforms on the software radio platform.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.53

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