原创 【33毕设】毕业设计(论文)OFDM通信系统基带数据

    北京交通大学毕业设计（论文）  

       正交频分复用（OFDM，Orthogonal Frequency Division Multiplexing）是当前一种非常热门的通信技术。它即可以被看作是一种调制技术，也可以被看作是一种复用技术。由于它具有抗多径衰落和频谱利用率高的特点，因此被广泛应用于高速数字通信领域，比如应用于IEEE 802.11a无线局域网（WLAN）的物理层等等。
        我的毕业设计的核心任务是：采用FPGA来实现一个基于OFDM技术的通信系统中的基带数据处理部分，即调制解调器。其中发射部分的调制器包括：信道编码（Reed-Solomon编码），交织，星座映射，FFT和插入循环前缀等模块。我另外制作了相应的解调器，可以实现上述功能的逆变换。另外，我还对OFDM技术，IEEE 802.11a的标准文献，基于Simulink的OFDM模型和仿真，ALTERA公司的技术和IP Core的使用等方面进行了研究。这些在文章中都有体现。
关键词：OFDM, FPGA, ALTERA
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  Abstract
Because of wireless environment where multipath maybe significant, Orthogonal Frequency Division Multiplexing (OFDM), a special form of multicarrier modulation (MCM), where a single data stream is transmitted over a number of lower rate subcarriers has recently received considerable attention for its robustness to multipath selective fading and high bandwidth efficiency. It can be seen as either a modulation technique or a multiplexing technique.
The main work of my graduate design is to implement baseband data processing section on FPGA of an OFDM-based communication system. It contains Reed-Solomon channel coding (FEC), interleaver, constellation, FFT and Prefix Cyclic parts.
In addition, I also pay much attention to other aspects during the design. That is, the study of OFDM, IEEE 802.11a Standard, a demo model of OFDM based on Simulink, devices and IP Megacore of ALTERA corp., which are detailed in my paper.
Key words: OFDM, FPGA, ALTERA

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