无线通信QAM调制FDD基带系统硬件平台设计与实现

发布时间：2019-01-19 13:37

【摘要】：随着4G技术的逐步成熟和在中国大规模商用的开始,无线与移动通信技术的发展逐步夸入一个新的时代,移动互联网技术和智能终端技术已经得到前所未有的发展,这也为大型通信设备的发展提出了新要求。本文主要对无线通信QAM调制制式下的FDD基带系统硬件平台的设计和实现进行研究,提出了一些针对系统的特有方案并完成了方案的硬件设计。最终完成了基带系统的联合调试、验证以及测试结果分析。本文对于无线通信基带系统的研究具有一定的现实意义。文章以FDD微波通信系统的工程实现为载体,研究了无线通信QAM调制下基带系统硬件平台的特点和设计方法。通过制定方案,方案可行性验证,器件选型、方案电路设计、高速PCB设计等,实现了一个既有链路接口又有业务接口,既可承载高效的通信链路算法又可以完成网络应用的基带系统硬件平台。本文首先分析系统原理,确定所要设计的基带系统的总体结构和方案,搭建验证平台完成对系统方案的可行性验证。系统以Xilinx公司的XC7K160T(FPGA)和TI公司的TMS320C6424(DSP)为核心处理器件,以FPGA+DSP的架构做为硬件平台的基本架构,根据实际需求做出器件选型方案。采用模块化的设计思想,基带系统硬件平台划分为FPGA最小系统、DSP最小系统、模拟信号处理部分、供电系统等四个主要部分;其中包涵采样率可微调位同步的硬件方案、预留载波恢复接口的硬件方案、数字AGC的接口方案、中频、射频控制接口方案、信号发送接口方案、高速信号采样方案、FPGA与DSP的互联方案等多种方案。完成基带系统硬件平台各个模块和方案设计后,在保证信号完整性的前提下完成了基带系统硬件平台的高速PCB设计,把各个模块和方案统一到了一块高速印制电路板上,通过移植通信链路算法形成一个稳定可靠的FDD基带系统。文章最后对无线通信QAM调制FDD基带系统工程设计中的软硬件结合的调试技巧和方法进行了研究,并以此完成了16QAM调制制式下FDD模式的基带系统对发对收验证和分析,最后设计中频调制、解调方案完成基带到中频的系统联合调试,给出系统的调试分析结果。
[Abstract]:With the gradual maturity of 4G technology and the beginning of large-scale commercial in China, the development of wireless and mobile communication technology has gradually entered a new era, mobile Internet technology and intelligent terminal technology has been unprecedented development. This also put forward new requirements for the development of large-scale communication equipment. In this paper, the design and implementation of the hardware platform of FDD baseband system based on QAM modulation system for wireless communication are studied, and some specific schemes for the system are put forward and the hardware design of the scheme is completed. Finally, the joint debugging, verification and test result analysis of the baseband system are completed. This paper has certain practical significance for the research of wireless communication baseband system. Based on the engineering implementation of FDD microwave communication system, this paper studies the characteristics and design method of baseband system hardware platform based on wireless communication QAM modulation. A link interface and a service interface are realized by making a scheme, feasibility verification, device selection, circuit design, high speed PCB design, etc. It can not only carry high efficiency communication link algorithm but also complete the hardware platform of baseband system for network application. In this paper, the principle of the system is analyzed, the overall structure and scheme of the baseband system are determined, and the feasibility of the system is verified by building a verification platform. The system takes the XC7K160T (FPGA) of Xilinx Company and TMS320C6424 (DSP) of TI Company as the core processing device, takes the structure of FPGA DSP as the basic structure of hardware platform, and makes the device selection scheme according to the actual demand. The hardware platform of baseband system is divided into four parts: FPGA minimum system, DSP minimum system, analog signal processing part and power supply system. It includes the hardware scheme that the sampling rate can be fine-tuned and synchronized, the hardware scheme of reserving carrier recovery interface, the interface scheme of digital AGC, if, RF control interface, the signal sending interface, the high-speed signal sampling, The interconnection scheme between FPGA and DSP, etc. After the design of each module and scheme of the baseband system hardware platform, the high-speed PCB design of the baseband system hardware platform is completed on the premise of ensuring the signal integrity, and each module and scheme are unified on a high-speed printed circuit board. A stable and reliable FDD baseband system is formed by transplanting the communication link algorithm. Finally, the debugging techniques and methods of hardware and software combination in the design of FDD baseband system for QAM modulation in wireless communication are studied, and the verification and analysis of the base band system in FDD mode under 16QAM modulation are completed. Finally, the intermediate frequency modulation and demodulation scheme are designed to complete the joint debugging of baseband to intermediate frequency system, and the results of system debugging and analysis are given.
【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】：TN92

【共引文献】