【作者】 王闯；

【导师】 谢仁宏；

【作者基本信息】 南京理工大学 ， 通信与信息系统， 2008， 硕士

【摘要】 随着超大规模集成电路技术和通信技术的发展,数字电视技术迅速发展起来。数字地面电视作为数字电视广播中最复杂的一个,具有在无线和移动条件下接收的能力,在我国有着广阔的应用前景。近几年来,随着微电子技术的迅猛发展,使得FPGA的各种性能越来越好,其在数字系统设计中占据了越来越重要的地位。考虑到系统成本、功耗和面市时间等因素,FPGA的发展为许多通信、音频、视频和图像系统提供了全新的解决方案。基于FPGA的系统解决方案在性价比和可移植性方面的优点使其有着广阔的发展前景。本文所做的工作是基于DVB-T标准的研究和FPGA设计,DVB-T是欧洲电信标准委员会提出的数字地面电视广播标准。本文首先介绍了DVB-T发射端的整体实现框图,重点分析了DVB-T标准中所用到的信道编码调制技术,说明了DVB-T系统的结构流程、核心技术及系统信道特性和参数。其次在MATLAB软件平台下仿真实现了高斯信道、莱斯信道的系统模型,深入研究了DVB-T系统在各种信道环境下的传输性能,全面分析了系统的优缺点。最后完成了DVB-T系统中信道编码调制各模块的FPGA设计与仿真验证,包括数据加扰,RS编码,外交织,卷积编码,比特交织,符号交织等子模块。通过仿真分析,可以看到各模块功能和性能都满足设计要求。更多还原

【Abstract】 With the development of VLSI technology and communication technology, the Digital TV technology develops rapidly. As one of the most complicated technology of digital video broadcasting, digital terrestrial video broadcasting can be used in wireless and mobile situation and will be used generally in China.In recent years, with the rapid development of micro-electronics technology, performance of FPGA gets better and better. So FPGA has become more and more important in digital system design. Development of FPGA provides new resolutions of many communication, audio, video and imaging systems when considering of cost, system power consumption and time to market. Cost performance and portability of the system resolution based on FPGA make FPGA have broad prospects.The research on FPGA design in the paper is based on DVB-T standard. DVB-T is brought forward by ESTI. At firstly, thesis gives the structure chart of transmitter in the DVB-T system and researches the different kinds of channel coding and modulation in the system particularly. It analyzes the system structure and system flow, the core techniques, the channel characteristic and parameters of DVB-T system. Then, does the simulation of DVB-T system with Gauss and Ricean channel under the MATLAB software environment. Analyzes and simulates the transmission of the system in all kinds of complex channel conditions and lucubrate the advantages and disadvantages of the system. At last, the FPGA design and simulation of the channel coding and modulation of DVB-T system has been completed using VHDL, including energy dispersal, outer coding, outer interleaving, inner coding, inner interleaving, etc. The simulation and validation prove that the modules are designed successfully and can work efficiently.更多还原