基于OFDM的数字图像无线传输关键技术研究
摘要数字图像无线传输技术是图像处理和无线收发技术的结合，在现代生活中发挥着越来越大的作用。为实现数字图像的无线传输，本课题基于OFDM通信技术，以FPGA为硬件平台，完成了整个系统方案的设计及系统关键技术的仿真研究。69355
本课题利用Matlab对编码中的分组交织、QAM调制、IFFT等模块以及解码中的分组检测、同步处理、信道均衡与估计等模块进行仿真研究，同时编写OFDM编解码模块的Verilog程序，并在Modelsim上进行功能仿真，验证了整个系统的可行性。最后，结合数字图像传输的特点，以FPGA为核心，设计了基于CCD图像传感器的图像采集模块、基于DDR2的存储模块、基于AD9762的数模转换模块以及基于AD9433的模数转换模块的电路原理图，完成了整个数字图像传输系统的硬件设计。
毕业论文关键词 OFDM 数字图像传输 FPGA 编解码
毕业设计说明书（论文）外文摘要
Title Key technology study of digital image wireless transmission based on OFDM
Abstract
Digital image wireless transmission technology, the combination of image processing and wireless communication is playing a more and more important role in modern life.The wireless transmission of digital image system based on OFDM communication technology with FPGA as the hardware platform is realized in this paper.
Matlab is used to carry on the simulation research of block interleaving, QAM modulation, IFFT and other modules in coding and Packet detection, synchronous processing, channel equalization and estimation and other modules in decoding.At the same time Verilog program for OFDM coding and decoding module are prepared for function simulation on Modelsim.The feasibility of the entire system are verified based on the results of the
simulation.Finally,combined with the characteristics of digital image transmission and using FPGA as the core, design of image acquisition module based on CCD image sensor,storage module based on DDR2,digital analog conversion module based on AD9762 and analog to digital conversion module based on AD9433 are finished.After that the hardware design of the whole digital image transmission system is completed.
Keywords OFDM digital image transmission FPGA encoding and decoding
目 次
1 引言 1
1.1 数字图像无线传输简介 1
1.2 数字图像无线传输技术研究现状 1
1.3 采取的研究方案和技术路线 2
1.4 本论文的主要工作以及内容安排 2
2 基于OFDM的数字图像无线传输系统工作原理 4
2.1 OFDM基本原理 4
2.2 数字图像无线传输与OFDM 5
2.3 基于OFDM数字图像无线传输系统方案设计 6
2.4 基于OFDM编解码原理 7
2.5 本章小结 8
3 基于OFDM的数字图像无线传输系统编解码模块设计及仿真 9
3.1 OFDM参数分析及计算 9
3.2 OFDM编码部分各模块设计及仿真 9